Sharon Worcester

Adding tiragolumab to first-line treatment with atezolizumab improves outcomes in patients with PD-L1–positive non–small cell lung cancer (NSCLC), according to updated results from the phase 2 CITYSCAPE study.

Patients who received tiragolumab, an anti-TIGIT antibody, in combination with atezolizumab, a PD-L1 inhibitor, had superior overall response rates (ORR) and progression-free survival (PFS), when compared with results of patients who received placebo with atezolizumab.

Melissa L. Johnson, MD, of the Sarah Cannon Research Institute in Nashville, Tenn., presented these results as part of the American Society of Clinical Oncology virtual scientific program.

Dr. Johnson explained that TIGIT is an immunomodulatory receptor present on activated T cells and natural killer cells in multiple cancers, including NSCLC.

“TIGIT inhibits T cells and natural killer cells by binding to its ligand PVR on tumor cells and antigen-presenting cells,” she said. “TIGIT expression strongly correlates with PD-1 expression, sometimes on the same tumor-infiltrating T cells in lung cancer. So the hypothesis of this trial was that anti-TIGIT antibodies, which prevent TIGIT from binding to its ligand, could restore the antitumor response and could complement the activity of anti–PD-L1/PD-1 antibodies.”

Dr. Johnson noted that combination anti–TIGIT/PD-L1 antibody treatment synergistically improved tumor control and prolonged survival over either antibody alone in preclinical models (Cancer Cell. 2014 Dec 8;26[6]:923-937). In addition, tiragolumab has been evaluated in a phase 1 study, both as monotherapy and in combination with atezolizumab, in multiple solid tumors (NCT02794571).

The phase 2 CITYSCAPE study (NCT03563716) was initiated to confirm the efficacy and safety of tiragolumab plus atezolizumab versus placebo plus atezolizumab for the first-line treatment of NSCLC, Dr. Johnson said.

CITYSCAPE enrolled 135 patients with chemotherapy-naive, PD-L1–positive, locally advanced or metastatic NSCLC. Patients did not have EGFR or ALK alterations.

Half of patients (n = 68) were randomized to receive tiragolumab at 600 mg plus atezolizumab at 1,200 mg, both given on day 1 of every 3-week cycle. The other half of patients (n = 67) were randomized to receive atezolizumab at the same dose and schedule plus placebo.
 

ORR and PFS

The study’s primary analysis was conducted in June 2019 at a median follow-up of 5.9 months. At that time, the ORR and PFS data showed an early benefit with tiragolumab. The ORR was 31% in the tiragolumab arm and 16% in the placebo arm. The median PFS was 5.42 months and 3.58 months, respectively (hazard ratio, 0.57).

With an additional 6 months of follow-up, the tiragolumab benefit persisted, Dr. Johnson said. The updated ORR in the intent-to-treat population was 37% in the tiragolumab arm and 21% in the placebo arm. The median PFS was 5.6 months and 3.9 months, respectively (HR, 0.58).

The tiragolumab combination showed “clinically meaningful” improvements in ORR and PFS, Dr. Johnson said. She also noted “a greater magnitude of improvement” was seen in patients with a PD-L1 tumor proportion score of 50% or greater.

There were 29 patients in each treatment arm with a PD-L1 tumor proportion score of 50% or greater. Among these patients, the ORR was 66% in the tiragolumab arm and 24% in the placebo arm. The median PFS was not reached and 4.1 months, respectively (HR, 0.30).

There were no significant differences in ORR or PFS among patients with PD-L1 tumor proportion scores below 50%, Dr. Johnson noted.

She added that duration of response and overall survival data are not yet mature and will be presented at a future conference.
 

Adverse events

As reported in the primary analysis, tiragolumab plus atezolizumab had a tolerable safety profile, Dr. Johnson said.

“Despite a near doubling of the median treatment duration [at the updated analysis], there were similar numbers of any-cause adverse events, grade 3-5 adverse events, and serious adverse events,” she said.

Overall, adverse events occurred in 99% of patients in the tiragolumab arm and 96% of those in the placebo arm. Rates of grade 3-5 adverse events were 48% and 44%, respectively. Rates of serious adverse events were 37% and 35%, respectively.

A higher frequency of adverse events in the tiragolumab arm was related to an increase in immune-related events, including infusion reactions, pruritus, rash, arthralgia, and nephritis. This makes sense because the patients in that group were receiving two active immunotherapies, Dr. Johnson said.
 

Data inspire cautious optimism

The safety and activity of tiragolumab plus atezolizumab are “to be confirmed in an ongoing phase 3 study called SKYSCRAPER-01 [NCT04294810],” Dr. Johnson said.

Invited discussant Grace K. Dy, MD, of Roswell Park Comprehensive Cancer Center in Buffalo, N.Y., said the ORRs in CITYSCAPE have “generated a lot of buzz,” but she urged caution pending phase 3 results.

“While we are all excited by the data and want to see a winner, we should be careful, as speed can also crash and burn,” she said. “We have plenty of examples of promising studies that collapsed in later phase trials.”

There is room, however, for cautious optimism that the combination is a promising advance “as long as no prognostic or confounding variable is determined later on to be nonrandomly distributed between the groups to account for the difference seen,” Dr. Dy said.

She also noted that “the distribution of favorable or unfavorable mutations between the groups is unknown, and understanding this will be relevant.”

Preclinical data suggest the presence of DNM1 expression is crucial for maximizing the effect of TIGIT blockade, and tumor MHC class 1 expression appears to be reduced alongside reductions in DNM1 expression in the intratumoral natural kill cells in lung cancer specimens, Dr. Dy explained.

“Assessment of these biomarkers will be instructive,” she said. “More recent data also appear to implicate a paradoxical role of soluble CD155 or PVR ligand in actually inhibiting DNM1, so the effect of systemic TIGIT blockade may be mitigated if there is rebound increase of counterbalancing signals by increased secretion of soluble CD155, and we look forward to more data in the future regarding this.”

CITYSCAPE was sponsored by Genentech. Dr. Johnson disclosed relationships with Genentech and numerous other companies. Dr. Dy disclosed relationships with AstraZeneca, GlaxoSmithKline, Takeda, Amgen, Bristol-Myers Squibb, Regeneron, and Tesaro.

[email protected]

SOURCE: Rodriguez-Abreu D et al. ASCO 2020, Abstract 9503.

Adding tiragolumab to first-line treatment with atezolizumab improves outcomes in patients with PD-L1–positive non–small cell lung cancer (NSCLC), according to updated results from the phase 2 CITYSCAPE study.

Patients who received tiragolumab, an anti-TIGIT antibody, in combination with atezolizumab, a PD-L1 inhibitor, had superior overall response rates (ORR) and progression-free survival (PFS), when compared with results of patients who received placebo with atezolizumab.

Melissa L. Johnson, MD, of the Sarah Cannon Research Institute in Nashville, Tenn., presented these results as part of the American Society of Clinical Oncology virtual scientific program.

Dr. Johnson explained that TIGIT is an immunomodulatory receptor present on activated T cells and natural killer cells in multiple cancers, including NSCLC.

“TIGIT inhibits T cells and natural killer cells by binding to its ligand PVR on tumor cells and antigen-presenting cells,” she said. “TIGIT expression strongly correlates with PD-1 expression, sometimes on the same tumor-infiltrating T cells in lung cancer. So the hypothesis of this trial was that anti-TIGIT antibodies, which prevent TIGIT from binding to its ligand, could restore the antitumor response and could complement the activity of anti–PD-L1/PD-1 antibodies.”

Dr. Johnson noted that combination anti–TIGIT/PD-L1 antibody treatment synergistically improved tumor control and prolonged survival over either antibody alone in preclinical models (Cancer Cell. 2014 Dec 8;26[6]:923-937). In addition, tiragolumab has been evaluated in a phase 1 study, both as monotherapy and in combination with atezolizumab, in multiple solid tumors (NCT02794571).

The phase 2 CITYSCAPE study (NCT03563716) was initiated to confirm the efficacy and safety of tiragolumab plus atezolizumab versus placebo plus atezolizumab for the first-line treatment of NSCLC, Dr. Johnson said.

CITYSCAPE enrolled 135 patients with chemotherapy-naive, PD-L1–positive, locally advanced or metastatic NSCLC. Patients did not have EGFR or ALK alterations.

Half of patients (n = 68) were randomized to receive tiragolumab at 600 mg plus atezolizumab at 1,200 mg, both given on day 1 of every 3-week cycle. The other half of patients (n = 67) were randomized to receive atezolizumab at the same dose and schedule plus placebo.
 

ORR and PFS

The study’s primary analysis was conducted in June 2019 at a median follow-up of 5.9 months. At that time, the ORR and PFS data showed an early benefit with tiragolumab. The ORR was 31% in the tiragolumab arm and 16% in the placebo arm. The median PFS was 5.42 months and 3.58 months, respectively (hazard ratio, 0.57).

With an additional 6 months of follow-up, the tiragolumab benefit persisted, Dr. Johnson said. The updated ORR in the intent-to-treat population was 37% in the tiragolumab arm and 21% in the placebo arm. The median PFS was 5.6 months and 3.9 months, respectively (HR, 0.58).

The tiragolumab combination showed “clinically meaningful” improvements in ORR and PFS, Dr. Johnson said. She also noted “a greater magnitude of improvement” was seen in patients with a PD-L1 tumor proportion score of 50% or greater.

There were 29 patients in each treatment arm with a PD-L1 tumor proportion score of 50% or greater. Among these patients, the ORR was 66% in the tiragolumab arm and 24% in the placebo arm. The median PFS was not reached and 4.1 months, respectively (HR, 0.30).

There were no significant differences in ORR or PFS among patients with PD-L1 tumor proportion scores below 50%, Dr. Johnson noted.

She added that duration of response and overall survival data are not yet mature and will be presented at a future conference.
 

Adverse events

As reported in the primary analysis, tiragolumab plus atezolizumab had a tolerable safety profile, Dr. Johnson said.

“Despite a near doubling of the median treatment duration [at the updated analysis], there were similar numbers of any-cause adverse events, grade 3-5 adverse events, and serious adverse events,” she said.

Overall, adverse events occurred in 99% of patients in the tiragolumab arm and 96% of those in the placebo arm. Rates of grade 3-5 adverse events were 48% and 44%, respectively. Rates of serious adverse events were 37% and 35%, respectively.

A higher frequency of adverse events in the tiragolumab arm was related to an increase in immune-related events, including infusion reactions, pruritus, rash, arthralgia, and nephritis. This makes sense because the patients in that group were receiving two active immunotherapies, Dr. Johnson said.
 

Data inspire cautious optimism

The safety and activity of tiragolumab plus atezolizumab are “to be confirmed in an ongoing phase 3 study called SKYSCRAPER-01 [NCT04294810],” Dr. Johnson said.

Invited discussant Grace K. Dy, MD, of Roswell Park Comprehensive Cancer Center in Buffalo, N.Y., said the ORRs in CITYSCAPE have “generated a lot of buzz,” but she urged caution pending phase 3 results.

“While we are all excited by the data and want to see a winner, we should be careful, as speed can also crash and burn,” she said. “We have plenty of examples of promising studies that collapsed in later phase trials.”

There is room, however, for cautious optimism that the combination is a promising advance “as long as no prognostic or confounding variable is determined later on to be nonrandomly distributed between the groups to account for the difference seen,” Dr. Dy said.

She also noted that “the distribution of favorable or unfavorable mutations between the groups is unknown, and understanding this will be relevant.”

Preclinical data suggest the presence of DNM1 expression is crucial for maximizing the effect of TIGIT blockade, and tumor MHC class 1 expression appears to be reduced alongside reductions in DNM1 expression in the intratumoral natural kill cells in lung cancer specimens, Dr. Dy explained.

“Assessment of these biomarkers will be instructive,” she said. “More recent data also appear to implicate a paradoxical role of soluble CD155 or PVR ligand in actually inhibiting DNM1, so the effect of systemic TIGIT blockade may be mitigated if there is rebound increase of counterbalancing signals by increased secretion of soluble CD155, and we look forward to more data in the future regarding this.”

CITYSCAPE was sponsored by Genentech. Dr. Johnson disclosed relationships with Genentech and numerous other companies. Dr. Dy disclosed relationships with AstraZeneca, GlaxoSmithKline, Takeda, Amgen, Bristol-Myers Squibb, Regeneron, and Tesaro.

[email protected]

SOURCE: Rodriguez-Abreu D et al. ASCO 2020, Abstract 9503.

Adding tiragolumab to first-line treatment with atezolizumab improves outcomes in patients with PD-L1–positive non–small cell lung cancer (NSCLC), according to updated results from the phase 2 CITYSCAPE study.

Patients who received tiragolumab, an anti-TIGIT antibody, in combination with atezolizumab, a PD-L1 inhibitor, had superior overall response rates (ORR) and progression-free survival (PFS), when compared with results of patients who received placebo with atezolizumab.

Melissa L. Johnson, MD, of the Sarah Cannon Research Institute in Nashville, Tenn., presented these results as part of the American Society of Clinical Oncology virtual scientific program.

Dr. Johnson explained that TIGIT is an immunomodulatory receptor present on activated T cells and natural killer cells in multiple cancers, including NSCLC.

“TIGIT inhibits T cells and natural killer cells by binding to its ligand PVR on tumor cells and antigen-presenting cells,” she said. “TIGIT expression strongly correlates with PD-1 expression, sometimes on the same tumor-infiltrating T cells in lung cancer. So the hypothesis of this trial was that anti-TIGIT antibodies, which prevent TIGIT from binding to its ligand, could restore the antitumor response and could complement the activity of anti–PD-L1/PD-1 antibodies.”

Dr. Johnson noted that combination anti–TIGIT/PD-L1 antibody treatment synergistically improved tumor control and prolonged survival over either antibody alone in preclinical models (Cancer Cell. 2014 Dec 8;26[6]:923-937). In addition, tiragolumab has been evaluated in a phase 1 study, both as monotherapy and in combination with atezolizumab, in multiple solid tumors (NCT02794571).

The phase 2 CITYSCAPE study (NCT03563716) was initiated to confirm the efficacy and safety of tiragolumab plus atezolizumab versus placebo plus atezolizumab for the first-line treatment of NSCLC, Dr. Johnson said.

CITYSCAPE enrolled 135 patients with chemotherapy-naive, PD-L1–positive, locally advanced or metastatic NSCLC. Patients did not have EGFR or ALK alterations.

Half of patients (n = 68) were randomized to receive tiragolumab at 600 mg plus atezolizumab at 1,200 mg, both given on day 1 of every 3-week cycle. The other half of patients (n = 67) were randomized to receive atezolizumab at the same dose and schedule plus placebo.
 

ORR and PFS

The study’s primary analysis was conducted in June 2019 at a median follow-up of 5.9 months. At that time, the ORR and PFS data showed an early benefit with tiragolumab. The ORR was 31% in the tiragolumab arm and 16% in the placebo arm. The median PFS was 5.42 months and 3.58 months, respectively (hazard ratio, 0.57).

With an additional 6 months of follow-up, the tiragolumab benefit persisted, Dr. Johnson said. The updated ORR in the intent-to-treat population was 37% in the tiragolumab arm and 21% in the placebo arm. The median PFS was 5.6 months and 3.9 months, respectively (HR, 0.58).

The tiragolumab combination showed “clinically meaningful” improvements in ORR and PFS, Dr. Johnson said. She also noted “a greater magnitude of improvement” was seen in patients with a PD-L1 tumor proportion score of 50% or greater.

There were 29 patients in each treatment arm with a PD-L1 tumor proportion score of 50% or greater. Among these patients, the ORR was 66% in the tiragolumab arm and 24% in the placebo arm. The median PFS was not reached and 4.1 months, respectively (HR, 0.30).

There were no significant differences in ORR or PFS among patients with PD-L1 tumor proportion scores below 50%, Dr. Johnson noted.

She added that duration of response and overall survival data are not yet mature and will be presented at a future conference.
 

Adverse events

As reported in the primary analysis, tiragolumab plus atezolizumab had a tolerable safety profile, Dr. Johnson said.

“Despite a near doubling of the median treatment duration [at the updated analysis], there were similar numbers of any-cause adverse events, grade 3-5 adverse events, and serious adverse events,” she said.

Overall, adverse events occurred in 99% of patients in the tiragolumab arm and 96% of those in the placebo arm. Rates of grade 3-5 adverse events were 48% and 44%, respectively. Rates of serious adverse events were 37% and 35%, respectively.

A higher frequency of adverse events in the tiragolumab arm was related to an increase in immune-related events, including infusion reactions, pruritus, rash, arthralgia, and nephritis. This makes sense because the patients in that group were receiving two active immunotherapies, Dr. Johnson said.
 

Data inspire cautious optimism

The safety and activity of tiragolumab plus atezolizumab are “to be confirmed in an ongoing phase 3 study called SKYSCRAPER-01 [NCT04294810],” Dr. Johnson said.

Invited discussant Grace K. Dy, MD, of Roswell Park Comprehensive Cancer Center in Buffalo, N.Y., said the ORRs in CITYSCAPE have “generated a lot of buzz,” but she urged caution pending phase 3 results.

“While we are all excited by the data and want to see a winner, we should be careful, as speed can also crash and burn,” she said. “We have plenty of examples of promising studies that collapsed in later phase trials.”

There is room, however, for cautious optimism that the combination is a promising advance “as long as no prognostic or confounding variable is determined later on to be nonrandomly distributed between the groups to account for the difference seen,” Dr. Dy said.

She also noted that “the distribution of favorable or unfavorable mutations between the groups is unknown, and understanding this will be relevant.”

Preclinical data suggest the presence of DNM1 expression is crucial for maximizing the effect of TIGIT blockade, and tumor MHC class 1 expression appears to be reduced alongside reductions in DNM1 expression in the intratumoral natural kill cells in lung cancer specimens, Dr. Dy explained.

“Assessment of these biomarkers will be instructive,” she said. “More recent data also appear to implicate a paradoxical role of soluble CD155 or PVR ligand in actually inhibiting DNM1, so the effect of systemic TIGIT blockade may be mitigated if there is rebound increase of counterbalancing signals by increased secretion of soluble CD155, and we look forward to more data in the future regarding this.”

CITYSCAPE was sponsored by Genentech. Dr. Johnson disclosed relationships with Genentech and numerous other companies. Dr. Dy disclosed relationships with AstraZeneca, GlaxoSmithKline, Takeda, Amgen, Bristol-Myers Squibb, Regeneron, and Tesaro.

[email protected]

SOURCE: Rodriguez-Abreu D et al. ASCO 2020, Abstract 9503.

Adjuvant gefitinib provides no overall survival (OS) benefit over standard chemotherapy for EGFR-mutant, resected, stage II-IIIA non–small cell lung cancer (NSCLC), according to final results from the phase 3 ADJUVANT trial.

The median OS was 75.5 months in patients randomized to adjuvant gefitinib and 62.8 months in patients randomized to vinorelbine plus cisplatin.

Yi-Long Wu, MD, of Guangdong Lung Cancer Institute in Guangzhou, China, reported these results as part of the American Society of Clinical Oncology virtual scientific program.

Prior results from this trial had shown a disease-free survival (DFS) benefit with gefitinib, but this did not translate to an OS benefit at the final analysis, Dr. Wu said.

He noted, however, that the median OS of 75.5 months in the gefitinib arm “was one of the best in resected EGFR-mutant non–small cell lung cancer, compared with historical data.”

The findings also suggest a possible benefit with at least 18 months of gefitinib and show that adjuvant EGFR tyrosine kinase inhibitors (TKIs) should be considered the optimal therapy to improve DFS and achieve potentially better OS in this setting, Dr. Wu said.
 

Study details and DFS

The ADJUVANT trial (NCT01405079) randomized 222 patients, aged 18-75 years, with EGFR-mutant, stage II-IIIA (N1-N2) NSCLC who had undergone complete resection. Patients were enrolled at 27 sites between September 2011 and April 2014.

The patients were randomized 1:1 to receive 250 mg of gefitinib once daily for 24 months, or 25 mg/m² of vinorelbine on days 1 and 8 plus 75 mg/m² of cisplatin on day 1 every 3 weeks for 4 cycles.

The intent-to-treat (ITT) population included 111 patients in each arm. The per-protocol population included 106 patients in the gefitinib arm and 87 patients in the chemotherapy arm.

Primary results from this trial showed a significant improvement in DFS with gefitinib (Lancet Oncol. 2018 Jan;19[1]:139-48). That improvement was maintained in the final analysis.

The median DFS was 30.8 months in the gefitinib arm and 19.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The hazard ratio (HR) was 0.56 (P = .001) in the ITT population and 0.51 (P < .001) in the per-protocol population.

In the ITT population, the 5-year DFS rates were 22.6% in the gefitinib arm and 23.2% in the chemotherapy arm. In the per-protocol population, the 5-year DFS rates were 22.6% and 22.8%, respectively.

OS results

The median OS was 75.5 months in the gefitinib arm and 62.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The HR was 0.92 in both the ITT (P = .674) and per-protocol populations (P = .686).

In the ITT population, the 5-year OS rates were 53.2% in the gefitinib arm and 51.2% in the chemotherapy arm. In the per-protocol population, the 5-year OS rates were 53.2% and 50.7%, respectively.

Subgroup analyses by age, gender, lymph node status, and EGFR mutation showed trends toward improved OS with gefitinib, but the differences were not statistically significant.

The researchers conducted a post hoc analysis to assess the effect of subsequent treatment on patient outcomes. The analysis showed that patients who received gefitinib with subsequent EGFR-TKIs had the best responses and OS.

The median OS was not reached among patients who received gefitinib and subsequent EGFR-TKIs, whereas the median OS ranged from 15.6 months to 62.8 months in other groups. The shortest OS was observed in patients who received adjuvant chemotherapy without subsequent therapy.

The duration of gefitinib treatment also appeared to affect OS. The median OS was 35.7 months in patients who received gefitinib for less than 18 months, and the median OS was not reached in patients who received gefitinib for 18 months or longer (HR, 0.38; P < .001).
 

Implications and potential next steps

Despite the lack of OS improvement with gefitinib, “all of the patients on this study did much, much better than historical non–small cell lung cancer not specified by the EGFR mutation, with 70 months median survival compared to 35 months median survival for N2-positive disease,” said invited discussant Christopher G. Azzoli, MD, director of thoracic oncology at Lifespan Cancer Institute at Brown University in Providence, R.I.

“But you can’t avoid noticing how the curves come back together in terms of disease-free survival when your effective treatment is limited to 24 months,” he added.

An apparent risk of late brain recurrence in the gefitinib arm is also a concern, Dr. Azzoli said. “So ... longer duration of treatment with a drug that has better control of CNS [central nervous system] disease, such as osimertinib, may improve both DFS and OS,” he added.

Only about 50% of patients in the chemotherapy arm received a TKI at recurrence. The post hoc analysis showing that TKI recipients had the best outcomes raises the question of whether “the survival benefit could be conferred by delivering a superior drug merely at recurrence, or is there benefit to earlier delivery of an effective drug,” Dr. Azzoli said.

Given the high cost of continuous therapy, biomarker refinement could help improve treatment decision-making, he said, noting that “early testing of blood DNA to detect cancer in the body as minimal residual disease is showing promise,” and that many phase 3 studies of EGFR-TKIs are ongoing.

The current trial was sponsored by the Guangdong Association of Clinical Trials. Dr. Wu disclosed relationships with AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb/China, Lilly, MSD Oncology, Pfizer, and Roche. Dr. Azzoli reported having no disclosures.

[email protected]

SOURCE: Wu Y et al. ASCO 2020, Abstract 9005.

Adjuvant gefitinib provides no overall survival (OS) benefit over standard chemotherapy for EGFR-mutant, resected, stage II-IIIA non–small cell lung cancer (NSCLC), according to final results from the phase 3 ADJUVANT trial.

The median OS was 75.5 months in patients randomized to adjuvant gefitinib and 62.8 months in patients randomized to vinorelbine plus cisplatin.

Yi-Long Wu, MD, of Guangdong Lung Cancer Institute in Guangzhou, China, reported these results as part of the American Society of Clinical Oncology virtual scientific program.

Prior results from this trial had shown a disease-free survival (DFS) benefit with gefitinib, but this did not translate to an OS benefit at the final analysis, Dr. Wu said.

He noted, however, that the median OS of 75.5 months in the gefitinib arm “was one of the best in resected EGFR-mutant non–small cell lung cancer, compared with historical data.”

The findings also suggest a possible benefit with at least 18 months of gefitinib and show that adjuvant EGFR tyrosine kinase inhibitors (TKIs) should be considered the optimal therapy to improve DFS and achieve potentially better OS in this setting, Dr. Wu said.
 

Study details and DFS

The ADJUVANT trial (NCT01405079) randomized 222 patients, aged 18-75 years, with EGFR-mutant, stage II-IIIA (N1-N2) NSCLC who had undergone complete resection. Patients were enrolled at 27 sites between September 2011 and April 2014.

The patients were randomized 1:1 to receive 250 mg of gefitinib once daily for 24 months, or 25 mg/m² of vinorelbine on days 1 and 8 plus 75 mg/m² of cisplatin on day 1 every 3 weeks for 4 cycles.

The intent-to-treat (ITT) population included 111 patients in each arm. The per-protocol population included 106 patients in the gefitinib arm and 87 patients in the chemotherapy arm.

Primary results from this trial showed a significant improvement in DFS with gefitinib (Lancet Oncol. 2018 Jan;19[1]:139-48). That improvement was maintained in the final analysis.

The median DFS was 30.8 months in the gefitinib arm and 19.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The hazard ratio (HR) was 0.56 (P = .001) in the ITT population and 0.51 (P < .001) in the per-protocol population.

In the ITT population, the 5-year DFS rates were 22.6% in the gefitinib arm and 23.2% in the chemotherapy arm. In the per-protocol population, the 5-year DFS rates were 22.6% and 22.8%, respectively.

OS results

The median OS was 75.5 months in the gefitinib arm and 62.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The HR was 0.92 in both the ITT (P = .674) and per-protocol populations (P = .686).

In the ITT population, the 5-year OS rates were 53.2% in the gefitinib arm and 51.2% in the chemotherapy arm. In the per-protocol population, the 5-year OS rates were 53.2% and 50.7%, respectively.

Subgroup analyses by age, gender, lymph node status, and EGFR mutation showed trends toward improved OS with gefitinib, but the differences were not statistically significant.

The researchers conducted a post hoc analysis to assess the effect of subsequent treatment on patient outcomes. The analysis showed that patients who received gefitinib with subsequent EGFR-TKIs had the best responses and OS.

The median OS was not reached among patients who received gefitinib and subsequent EGFR-TKIs, whereas the median OS ranged from 15.6 months to 62.8 months in other groups. The shortest OS was observed in patients who received adjuvant chemotherapy without subsequent therapy.

The duration of gefitinib treatment also appeared to affect OS. The median OS was 35.7 months in patients who received gefitinib for less than 18 months, and the median OS was not reached in patients who received gefitinib for 18 months or longer (HR, 0.38; P < .001).
 

Implications and potential next steps

Despite the lack of OS improvement with gefitinib, “all of the patients on this study did much, much better than historical non–small cell lung cancer not specified by the EGFR mutation, with 70 months median survival compared to 35 months median survival for N2-positive disease,” said invited discussant Christopher G. Azzoli, MD, director of thoracic oncology at Lifespan Cancer Institute at Brown University in Providence, R.I.

“But you can’t avoid noticing how the curves come back together in terms of disease-free survival when your effective treatment is limited to 24 months,” he added.

An apparent risk of late brain recurrence in the gefitinib arm is also a concern, Dr. Azzoli said. “So ... longer duration of treatment with a drug that has better control of CNS [central nervous system] disease, such as osimertinib, may improve both DFS and OS,” he added.

Only about 50% of patients in the chemotherapy arm received a TKI at recurrence. The post hoc analysis showing that TKI recipients had the best outcomes raises the question of whether “the survival benefit could be conferred by delivering a superior drug merely at recurrence, or is there benefit to earlier delivery of an effective drug,” Dr. Azzoli said.

Given the high cost of continuous therapy, biomarker refinement could help improve treatment decision-making, he said, noting that “early testing of blood DNA to detect cancer in the body as minimal residual disease is showing promise,” and that many phase 3 studies of EGFR-TKIs are ongoing.

The current trial was sponsored by the Guangdong Association of Clinical Trials. Dr. Wu disclosed relationships with AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb/China, Lilly, MSD Oncology, Pfizer, and Roche. Dr. Azzoli reported having no disclosures.

[email protected]

SOURCE: Wu Y et al. ASCO 2020, Abstract 9005.

Adjuvant gefitinib provides no overall survival (OS) benefit over standard chemotherapy for EGFR-mutant, resected, stage II-IIIA non–small cell lung cancer (NSCLC), according to final results from the phase 3 ADJUVANT trial.

The median OS was 75.5 months in patients randomized to adjuvant gefitinib and 62.8 months in patients randomized to vinorelbine plus cisplatin.

Yi-Long Wu, MD, of Guangdong Lung Cancer Institute in Guangzhou, China, reported these results as part of the American Society of Clinical Oncology virtual scientific program.

Prior results from this trial had shown a disease-free survival (DFS) benefit with gefitinib, but this did not translate to an OS benefit at the final analysis, Dr. Wu said.

He noted, however, that the median OS of 75.5 months in the gefitinib arm “was one of the best in resected EGFR-mutant non–small cell lung cancer, compared with historical data.”

The findings also suggest a possible benefit with at least 18 months of gefitinib and show that adjuvant EGFR tyrosine kinase inhibitors (TKIs) should be considered the optimal therapy to improve DFS and achieve potentially better OS in this setting, Dr. Wu said.
 

Study details and DFS

The ADJUVANT trial (NCT01405079) randomized 222 patients, aged 18-75 years, with EGFR-mutant, stage II-IIIA (N1-N2) NSCLC who had undergone complete resection. Patients were enrolled at 27 sites between September 2011 and April 2014.

The patients were randomized 1:1 to receive 250 mg of gefitinib once daily for 24 months, or 25 mg/m² of vinorelbine on days 1 and 8 plus 75 mg/m² of cisplatin on day 1 every 3 weeks for 4 cycles.

The intent-to-treat (ITT) population included 111 patients in each arm. The per-protocol population included 106 patients in the gefitinib arm and 87 patients in the chemotherapy arm.

Primary results from this trial showed a significant improvement in DFS with gefitinib (Lancet Oncol. 2018 Jan;19[1]:139-48). That improvement was maintained in the final analysis.

The median DFS was 30.8 months in the gefitinib arm and 19.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The hazard ratio (HR) was 0.56 (P = .001) in the ITT population and 0.51 (P < .001) in the per-protocol population.

In the ITT population, the 5-year DFS rates were 22.6% in the gefitinib arm and 23.2% in the chemotherapy arm. In the per-protocol population, the 5-year DFS rates were 22.6% and 22.8%, respectively.

OS results

The median OS was 75.5 months in the gefitinib arm and 62.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The HR was 0.92 in both the ITT (P = .674) and per-protocol populations (P = .686).

In the ITT population, the 5-year OS rates were 53.2% in the gefitinib arm and 51.2% in the chemotherapy arm. In the per-protocol population, the 5-year OS rates were 53.2% and 50.7%, respectively.

Subgroup analyses by age, gender, lymph node status, and EGFR mutation showed trends toward improved OS with gefitinib, but the differences were not statistically significant.

The researchers conducted a post hoc analysis to assess the effect of subsequent treatment on patient outcomes. The analysis showed that patients who received gefitinib with subsequent EGFR-TKIs had the best responses and OS.

The median OS was not reached among patients who received gefitinib and subsequent EGFR-TKIs, whereas the median OS ranged from 15.6 months to 62.8 months in other groups. The shortest OS was observed in patients who received adjuvant chemotherapy without subsequent therapy.

The duration of gefitinib treatment also appeared to affect OS. The median OS was 35.7 months in patients who received gefitinib for less than 18 months, and the median OS was not reached in patients who received gefitinib for 18 months or longer (HR, 0.38; P < .001).
 

Implications and potential next steps

Despite the lack of OS improvement with gefitinib, “all of the patients on this study did much, much better than historical non–small cell lung cancer not specified by the EGFR mutation, with 70 months median survival compared to 35 months median survival for N2-positive disease,” said invited discussant Christopher G. Azzoli, MD, director of thoracic oncology at Lifespan Cancer Institute at Brown University in Providence, R.I.

“But you can’t avoid noticing how the curves come back together in terms of disease-free survival when your effective treatment is limited to 24 months,” he added.

An apparent risk of late brain recurrence in the gefitinib arm is also a concern, Dr. Azzoli said. “So ... longer duration of treatment with a drug that has better control of CNS [central nervous system] disease, such as osimertinib, may improve both DFS and OS,” he added.

Only about 50% of patients in the chemotherapy arm received a TKI at recurrence. The post hoc analysis showing that TKI recipients had the best outcomes raises the question of whether “the survival benefit could be conferred by delivering a superior drug merely at recurrence, or is there benefit to earlier delivery of an effective drug,” Dr. Azzoli said.

Given the high cost of continuous therapy, biomarker refinement could help improve treatment decision-making, he said, noting that “early testing of blood DNA to detect cancer in the body as minimal residual disease is showing promise,” and that many phase 3 studies of EGFR-TKIs are ongoing.

The current trial was sponsored by the Guangdong Association of Clinical Trials. Dr. Wu disclosed relationships with AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb/China, Lilly, MSD Oncology, Pfizer, and Roche. Dr. Azzoli reported having no disclosures.

[email protected]

SOURCE: Wu Y et al. ASCO 2020, Abstract 9005.

This is the second of a two-part article on the role of racism and bias in the U.S. maternal mortality crisis and part of an ongoing Ob.Gyn. News feature series on the crisis. Part one of the story explored existing data, societal factors, and patient experiences related to structural racism, overt racism, and implicit bias as factors contributing to racial disparities in maternal outcomes. Here we explore potential solutions for addressing the inequities as proposed by thought leaders and key stakeholders.



The emerging racial disparities in COVID-19 incidence and outcomes in the United States are on a collision course with long-standing racial disparities in U.S. maternal care and mortality.

Maternal health advocates are bracing for the impact, but in the spotlight that the pandemic is training on the inequities and the health system changes taking shape in its wake, some also see hope for a shift in at least one important driver of the racial health disparities: access to care.

Non-Hispanic black women are at least three times more likely than Hispanic women and non-Hispanic white women to experience pregnancy-related death, and indigenous women are more than twice as likely, according to the latest data from the Centers for Disease Control and Prevention’s National Center for Health Statistics. The added strain COVID-19 is putting on the system stands to further limit the access to care that many pregnant women of color experience and to exacerbate racial disparities, panelists agreed during a recent National Maternal Health Patient Centered Outcomes Research Network webinar entitled “The Impact of COVID-19 on Black, Brown, and Native Pregnant People.”

“The saying is that ‘the virus doesn’t discriminate,’ but it understands our biases, right? So, the virus takes advantage of the weaknesses in our system,” said panelist Joia A. Crear-Perry, MD, an ob.gyn. and founder and president of the National Birth Equity Collaborative (NBEC), a New Orleans–based research, training, and advocacy organization working to optimize black maternal and infant health.
 

Hope for solutions from the ashes of a pandemic

The weaknesses in the system that Dr. Crear-Perry spoke of are in many ways a product of structural racism as described in a conceptual report in The Lancet, titled “America: Equity and Equality in Health,” which dug into the entrenched and tangled historical roots of racist sociological and political factors that formed a foundation for health inequity over time.

Today, people of color remain more likely to be excluded from access to health insurance and adequate health care. The authors defined structural racism as “the totality of ways in which societies foster racial discrimination through mutually reinforcing systems of housing, education, employment, earnings, benefits, credit, media, health care, and criminal justice.” Today, largely as a result of these “reinforcing systems,” people of color remain more likely to be excluded from access to health insurance and adequate health care. At the same time, and for the same reasons, they are more likely to work in the service industry, be essential workers, and use mass transit, each of which increases the risk of exposure to COVID-19, Dr. Crear-Perry explained.

“It’s important for us to know that, for maternal mortality, it’s the same thing that happens,” she said. That means the focus on COVID-19–related disparities helps magnify and elevate the conversation regarding similar disparities in maternal outcomes.

It also means that some of the care delivery solutions embraced and facilitated amid the pandemic, such as extension of Medicaid coverage for up to a year after giving birth and broader use and insurance coverage of telemedicine, could finally gain traction; those are solutions long-sought by advocates like Dr. Crear-Perry and others as a means for alleviating racial disparities in maternal outcomes and addressing the maternal mortality crisis.

Therein lies the hope, she explained in an interview. “Some of the policies that we know would have been helpful prior to COVID-19 now are being seen as really important.”
 

Solution: Extending coverage

During a May 7 virtual Congressional hearing on “America’s Two Public Health Crises: The Impact of COVID-19 on Racial Inequities and Maternal Mortality in the U.S.,” cosponsored by the American College of Obstetricians and Gynecologists, the March of Dimes, and the NBEC, Dr. Crear-Perry further explained the importance of extended coverage and care access.

Asked what Congress could do immediately to “ensure that the pandemic does not compound the nation’s maternal mortality crisis, including unacceptable rates among black women,” she didn’t hesitate.

“Well, it would be amazing if we could get Medicaid extended for 12 months post delivery,” she said. “As you can imagine right now, we have moms who are birthing in hospitals where they have to worry about, 2 months later, not having coverage for themselves.”

If that mom is exposed to COVID-19 and has no insurance coverage and a newborn at home, the likelihood that she will call a provider if she develops symptoms is low, Dr. Crear-Perry said. “This is a great opportunity for us to really rethink some of those policies that we know are barriers, that we have created for people to be able to thrive after they have a baby and during child birth.”

Current policies are centered around an arbitrary cutoff of about 6 weeks for postpartum care, but the CDC reports that a third of all postpartum deaths occur between 1 week and 12 months after birth.

“We need our policies to reflect the current knowledge and the science,” she said. “Just like babies have automatic insurance coverage for a year later, mothers should have the same.”

Medicaid finances nearly half of all births in the United States, according to a 2019 Kaiser Family Foundation brief, which explained that federal law requires Medicaid coverage for only 60 days post partum for women who are eligible. Decisions regarding coverage after 60 days are determined by individual states; those that expanded Medicaid under the Affordable Care Act typically allow extended coverage – but only with reapplication at 60 days.

Many women in nonexpansion states become uninsured after pregnancy-related coverage ends, as do some in expansion states for whom reapplying is a hurdle too high to clear with a newborn baby to care for at home, Dr. Crear-Perry said.

Addressing these coverage gaps is key to improving access, and it is a core component of the Black Maternal Health Momnibus Act of 2020, a nine-bill package introduced in March by Rep. Lauren Underwood (D-Ill.), Rep. Alma Adams (D-N.C.), Sen. Kamala Harris (D-Calif.), and members of the Black Maternal Health Caucus to “fill gaps in existing legislation to comprehensively address every dimension of the Black maternal health crisis in America.”

One bill in the package addresses extended coverage with a goal to “promote innovative payment models to incentivize high-quality maternity care and continuity of health insurance coverage from pregnancy through labor and delivery and up to 1 year post partum.” Another focuses on promoting alternative ways to access care, such as through telemedicine.

Solution: Expanding care access

“There is a need for the democratization of care,” Dr. Crear-Perry said. “There is a need for people to have more ways to get care. This idea that the only way you can get prenatal care is you have to come to me at my office, has been a burden for working people for a long, long time.”

The COVID-19 pandemic necessitates increased use of telemedicine, but building blocks to allow patients to use it effectively must be put in place, she said. That means expanding broadband access, providing patients with blood pressure cuffs and other tools for use remotely, and expanding reimbursement to include not just video, but also phone calls.

Heart Safe Motherhood, a University of Pennsylvania text-based intervention developed to address postpartum hypertension – a leading cause of maternal morbidity and mortality, and at the start of the program, the leading cause of 7-day readmissions among obstetric patients, demonstrated the value of such approaches to care.

The program involves remote blood pressure monitoring using a digital monitor provided to at-risk patients at discharge. Text-based monitoring reminders encourage patients to check their blood pressure twice daily for the first 7 days.

“In our randomized, controlled trial, we saw our ability to meet ACOG guidelines on postpartum blood monitoring leap from 0% to 82%, compared to in-person office visits and 7-day readmissions from hypertension drop from 3% to 0%,” an update at the program website states.

ACOG

Rebekah Gee, MD, an ob.gyn. and director of the Louisiana State University Health System in New Orleans, also noted the importance of finding ways to deliver care “that are outside the traditional norm.

“Telemedicine, home visiting ... I think there are a wide variety of ways,” she said, noting that these kind of approaches not only help circumvent roadblocks to care, such as lack of transportation, but also can feel more personal and approachable for some women.
 

Solution: Measuring, investing, diversifying, respecting

The aims of other bills in the Momnibus Act also mirror several solutions proposed by maternal health advocates interviewed for this article. Among them are:

• Development of improved data collection processes and quality measures to better understand the factors that contribute to the crisis overall and among special populations, and to inform solutions for addressing them.
• Investments in social determinants of health that influence maternal health outcomes, like housing, transportation, and nutrition.
• Commitment to the growth and diversification of the perinatal workforce to ensure that every mom receives maternity care and support from people she can trust to provide quality care and treat her with respect.

The latter is one that Dr. Gee, Dr. Crear-Perry, and others particularly emphasized.

“We need patient advocates like doulas, midwives and others who are better listeners and better able to advocate for patients,” Dr. Gee said. This would better allow for women’s desires in the childbirth experience to be addressed appropriately, she said, adding that this is something that “frankly, a lot of doctors do not have the time to do.”

That’s why the efforts to address maternal mortality have to focus on the health care system, not just on doctors’ behavior with respect to bias, she said.

Dr. Gee also said there is a need for culturally appropriate literacy and numeracy communications “that respect how people seek and understand information.” This varies by population, which is why it’s important to provide the same approach to care “no matter what the patient looks like,” while also understanding that different patients communicate in different ways.

A 2019 study published in Social Science & Medicine underscored how communication differences can affect outcomes; using a national sample of women who gave birth in U.S. hospitals, the authors found that those who had declined care for themselves or their infant during their childbirth hospitalization were more likely to report receiving poor treatment based on race or ethnicity. They concluded that, in the context of childbirth care, women – particularly black women – pay a penalty for what is perceived as uncooperative behavior.

This is another area where doulas and other patient advocates can help, Dr. Gee said.

Doulas have long been an integral part of the birthing process for many women, particularly women of color, and evidence suggests the supportive care they provide helps to improve outcomes. In fact, several states – including Oregon, Minnesota, and New York, among others – have expanded or have proposed expanding Medicaid coverage to include doula services for pregnant beneficiaries, a move cheered by doula associations and other maternal health advocates.

In many ways, it’s about “respectful maternity care,” which is something Dr. Crear-Perry has been working to promote through the NBEC in partnership with ACOG and the Robert Wood Johnson Foundation. It’s also something the World Health Organization has promoted by establishing global standards for such care.

“We’re hoping to socialize that as a norm in United States ... to really see what it would look like to value what birthing people want and to see them as partners in their birth,” she said.

However, the 2019 Giving Voice to Mothers study demonstrating consistently higher rates of mistreatment during obstetrical care for women of color than for comparable white women shows that the United States is falling short of those standards. The national study of 2,700 women examined how race, ethnicity, and place of birth interact with the experience of receiving maternity care in the United States, and showed that 1 in 6 experienced one or more types of mistreatment – with consistently higher rates among women of color, even after adjusting for interactions between race and other maternal characteristics, Saraswathi Veda, MD, of the Birth Place Lab and professor of midwifery at the University of British Columbia, Vancouver, and colleagues reported in Reproductive Health.
 

Solution: Listening, learning, reflecting, partnering

Timoria McQueen Saba, birth trauma survivor and maternal health advocate, has described experiencing instances of mistreatment throughout her obstetric care, and like Dr. Crear-Perry, she said trust and collaboration in care is imperative for improving outcomes.

“I think the most important thing you can do is really consider a patient a partner in the care you give them,” she said during a panel discussion at the 2019 ACOG annual meeting. “You’re not experts in their lived experience ... center a patient’s voice or the voice of a patient’s family. Incorporate that into your learning.”

During a virtual workshop held May 19-20 by the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Judette Louis, MD, chair of the department of obstetrics and gynecology at the University of South Florida, Tampa, and president of the Society of Maternal-Fetal Medicine, provided practical guidance for addressing racism and implicit bias in practice and in research to reduce disparities in outcomes.

In an interview, she summarized her key points, reiterating solutions proposed by Dr. Gee and Dr. Crear-Perry and addressed in the Momnibus Act, and also offering a few others:

First, put aside the notion that disparities are genetically driven. For a variety of reasons, that just doesn’t make sense. For one thing, not all blacks are African American.

“My family is from the Caribbean,” she said. “Is it really conceivable that we’re all so similar?”

Look also at the disparities among Native Americans, she said. “How can you take 500 distinct tribes that live across a wide geographic area and lump them into one group and assume that they are similar?”

The problem is racism, not race. “When you keep saying ‘it’s about race, it’s about race, it’s about race’ – that sends a message to the person who is of that race that there is something inherently broken about [them],” she said.

Recognize that the roots of the problem run deep. Learn about and support efforts to address the underlying structural factors that contribute to the problem, Dr. Louis emphasized, and recognize your own bias. “We all have it. The key is to recognize [biases] and mitigate them when taking care of patients.”

That’s easier said than done, at least judging by one survey of maternal-fetal medicine specialists in which 84% of respondents agreed that disparities impact practice, but only 29% agreed their own personal biases affect how they care for patients, she noted.

Tools are available to help individuals identify implicit bias, and training programs for health care providers can help, as well, she said. Implicit bias tests and training programs that help to identify and address bias and racism on individual and organizational levels are increasingly available through academic centers, health systems, and advocacy organizations.

Hope for solutions: Progress and promise

Like Dr. Crear-Perry, Dr. Louis sees hope for reducing disparities and improving maternal outcomes.

In another survey of SMFM members to identify the practice issues most important to them, racial disparities ranked in the top three.

“It says a lot that our [maternal-fetal medicine specialists] really see this as a problem and they want it fixed,” she said. “And I think it says that a lot of people need to work on this, not just us.”

Indeed, many are engaged in that work. Veronica Gillispie, MD, medical director of the Louisiana Perinatal Quality Collaborative and Pregnancy-Associated Mortality Review, has been instrumental in recent initiatives to improve maternal outcomes in Louisiana, and she too said she feels optimistic.

“I am hopeful and I do see signs of hope,” she said in an interview.

Teams that she works with and trains seem invested, institutions are increasingly implementing faculty training on racism and bias, and Oschner Health, where Dr. Gillispie practices as an ob.gyn., appointed its first chief diversity officer in February.

Medical students she works with are attuned to the issues of racism, bias, and disparities, and they show a desire to enact change, she said. “They already get it, and they are working to make it better.”

Dr. Crear-Perry also predicts practice-changing results from studies looking at the delivery of obstetrical care and the role of supportive care, and she pointed out another aspect of the COVID-19 crisis that provides an important lesson for health care providers who care for birthing people: the scarcity of personal protective equipment amid the pandemic.

“My friends who are ob.gyns., who are now not getting access to the things they need to stay safe to practice medicine and who are feeling very marginalized at this moment, feeling not valued – that’s how birthing people [of color] feel,” she said. “I’m hoping that builds a sense of empathy.

”I’m hoping at the end of this crisis, that those ob.gyns. will think of patients as allies in fighting for more access to health for everybody and for more resources to do their work,” Dr. Crear-Perry said. “We’re all in this together.”

[email protected]

This is the second of a two-part article on the role of racism and bias in the U.S. maternal mortality crisis and part of an ongoing Ob.Gyn. News feature series on the crisis. Part one of the story explored existing data, societal factors, and patient experiences related to structural racism, overt racism, and implicit bias as factors contributing to racial disparities in maternal outcomes. Here we explore potential solutions for addressing the inequities as proposed by thought leaders and key stakeholders.



The emerging racial disparities in COVID-19 incidence and outcomes in the United States are on a collision course with long-standing racial disparities in U.S. maternal care and mortality.

Maternal health advocates are bracing for the impact, but in the spotlight that the pandemic is training on the inequities and the health system changes taking shape in its wake, some also see hope for a shift in at least one important driver of the racial health disparities: access to care.

Non-Hispanic black women are at least three times more likely than Hispanic women and non-Hispanic white women to experience pregnancy-related death, and indigenous women are more than twice as likely, according to the latest data from the Centers for Disease Control and Prevention’s National Center for Health Statistics. The added strain COVID-19 is putting on the system stands to further limit the access to care that many pregnant women of color experience and to exacerbate racial disparities, panelists agreed during a recent National Maternal Health Patient Centered Outcomes Research Network webinar entitled “The Impact of COVID-19 on Black, Brown, and Native Pregnant People.”

“The saying is that ‘the virus doesn’t discriminate,’ but it understands our biases, right? So, the virus takes advantage of the weaknesses in our system,” said panelist Joia A. Crear-Perry, MD, an ob.gyn. and founder and president of the National Birth Equity Collaborative (NBEC), a New Orleans–based research, training, and advocacy organization working to optimize black maternal and infant health.
 

Hope for solutions from the ashes of a pandemic

The weaknesses in the system that Dr. Crear-Perry spoke of are in many ways a product of structural racism as described in a conceptual report in The Lancet, titled “America: Equity and Equality in Health,” which dug into the entrenched and tangled historical roots of racist sociological and political factors that formed a foundation for health inequity over time.

Today, people of color remain more likely to be excluded from access to health insurance and adequate health care. The authors defined structural racism as “the totality of ways in which societies foster racial discrimination through mutually reinforcing systems of housing, education, employment, earnings, benefits, credit, media, health care, and criminal justice.” Today, largely as a result of these “reinforcing systems,” people of color remain more likely to be excluded from access to health insurance and adequate health care. At the same time, and for the same reasons, they are more likely to work in the service industry, be essential workers, and use mass transit, each of which increases the risk of exposure to COVID-19, Dr. Crear-Perry explained.

“It’s important for us to know that, for maternal mortality, it’s the same thing that happens,” she said. That means the focus on COVID-19–related disparities helps magnify and elevate the conversation regarding similar disparities in maternal outcomes.

It also means that some of the care delivery solutions embraced and facilitated amid the pandemic, such as extension of Medicaid coverage for up to a year after giving birth and broader use and insurance coverage of telemedicine, could finally gain traction; those are solutions long-sought by advocates like Dr. Crear-Perry and others as a means for alleviating racial disparities in maternal outcomes and addressing the maternal mortality crisis.

Therein lies the hope, she explained in an interview. “Some of the policies that we know would have been helpful prior to COVID-19 now are being seen as really important.”
 

Solution: Extending coverage

During a May 7 virtual Congressional hearing on “America’s Two Public Health Crises: The Impact of COVID-19 on Racial Inequities and Maternal Mortality in the U.S.,” cosponsored by the American College of Obstetricians and Gynecologists, the March of Dimes, and the NBEC, Dr. Crear-Perry further explained the importance of extended coverage and care access.

Asked what Congress could do immediately to “ensure that the pandemic does not compound the nation’s maternal mortality crisis, including unacceptable rates among black women,” she didn’t hesitate.

“Well, it would be amazing if we could get Medicaid extended for 12 months post delivery,” she said. “As you can imagine right now, we have moms who are birthing in hospitals where they have to worry about, 2 months later, not having coverage for themselves.”

If that mom is exposed to COVID-19 and has no insurance coverage and a newborn at home, the likelihood that she will call a provider if she develops symptoms is low, Dr. Crear-Perry said. “This is a great opportunity for us to really rethink some of those policies that we know are barriers, that we have created for people to be able to thrive after they have a baby and during child birth.”

Current policies are centered around an arbitrary cutoff of about 6 weeks for postpartum care, but the CDC reports that a third of all postpartum deaths occur between 1 week and 12 months after birth.

“We need our policies to reflect the current knowledge and the science,” she said. “Just like babies have automatic insurance coverage for a year later, mothers should have the same.”

Medicaid finances nearly half of all births in the United States, according to a 2019 Kaiser Family Foundation brief, which explained that federal law requires Medicaid coverage for only 60 days post partum for women who are eligible. Decisions regarding coverage after 60 days are determined by individual states; those that expanded Medicaid under the Affordable Care Act typically allow extended coverage – but only with reapplication at 60 days.

Many women in nonexpansion states become uninsured after pregnancy-related coverage ends, as do some in expansion states for whom reapplying is a hurdle too high to clear with a newborn baby to care for at home, Dr. Crear-Perry said.

Addressing these coverage gaps is key to improving access, and it is a core component of the Black Maternal Health Momnibus Act of 2020, a nine-bill package introduced in March by Rep. Lauren Underwood (D-Ill.), Rep. Alma Adams (D-N.C.), Sen. Kamala Harris (D-Calif.), and members of the Black Maternal Health Caucus to “fill gaps in existing legislation to comprehensively address every dimension of the Black maternal health crisis in America.”

One bill in the package addresses extended coverage with a goal to “promote innovative payment models to incentivize high-quality maternity care and continuity of health insurance coverage from pregnancy through labor and delivery and up to 1 year post partum.” Another focuses on promoting alternative ways to access care, such as through telemedicine.

Solution: Expanding care access

“There is a need for the democratization of care,” Dr. Crear-Perry said. “There is a need for people to have more ways to get care. This idea that the only way you can get prenatal care is you have to come to me at my office, has been a burden for working people for a long, long time.”

The COVID-19 pandemic necessitates increased use of telemedicine, but building blocks to allow patients to use it effectively must be put in place, she said. That means expanding broadband access, providing patients with blood pressure cuffs and other tools for use remotely, and expanding reimbursement to include not just video, but also phone calls.

Heart Safe Motherhood, a University of Pennsylvania text-based intervention developed to address postpartum hypertension – a leading cause of maternal morbidity and mortality, and at the start of the program, the leading cause of 7-day readmissions among obstetric patients, demonstrated the value of such approaches to care.

The program involves remote blood pressure monitoring using a digital monitor provided to at-risk patients at discharge. Text-based monitoring reminders encourage patients to check their blood pressure twice daily for the first 7 days.

“In our randomized, controlled trial, we saw our ability to meet ACOG guidelines on postpartum blood monitoring leap from 0% to 82%, compared to in-person office visits and 7-day readmissions from hypertension drop from 3% to 0%,” an update at the program website states.

ACOG

Rebekah Gee, MD, an ob.gyn. and director of the Louisiana State University Health System in New Orleans, also noted the importance of finding ways to deliver care “that are outside the traditional norm.

“Telemedicine, home visiting ... I think there are a wide variety of ways,” she said, noting that these kind of approaches not only help circumvent roadblocks to care, such as lack of transportation, but also can feel more personal and approachable for some women.
 

Solution: Measuring, investing, diversifying, respecting

The aims of other bills in the Momnibus Act also mirror several solutions proposed by maternal health advocates interviewed for this article. Among them are:

• Development of improved data collection processes and quality measures to better understand the factors that contribute to the crisis overall and among special populations, and to inform solutions for addressing them.
• Investments in social determinants of health that influence maternal health outcomes, like housing, transportation, and nutrition.
• Commitment to the growth and diversification of the perinatal workforce to ensure that every mom receives maternity care and support from people she can trust to provide quality care and treat her with respect.

The latter is one that Dr. Gee, Dr. Crear-Perry, and others particularly emphasized.

“We need patient advocates like doulas, midwives and others who are better listeners and better able to advocate for patients,” Dr. Gee said. This would better allow for women’s desires in the childbirth experience to be addressed appropriately, she said, adding that this is something that “frankly, a lot of doctors do not have the time to do.”

That’s why the efforts to address maternal mortality have to focus on the health care system, not just on doctors’ behavior with respect to bias, she said.

Dr. Gee also said there is a need for culturally appropriate literacy and numeracy communications “that respect how people seek and understand information.” This varies by population, which is why it’s important to provide the same approach to care “no matter what the patient looks like,” while also understanding that different patients communicate in different ways.

A 2019 study published in Social Science & Medicine underscored how communication differences can affect outcomes; using a national sample of women who gave birth in U.S. hospitals, the authors found that those who had declined care for themselves or their infant during their childbirth hospitalization were more likely to report receiving poor treatment based on race or ethnicity. They concluded that, in the context of childbirth care, women – particularly black women – pay a penalty for what is perceived as uncooperative behavior.

This is another area where doulas and other patient advocates can help, Dr. Gee said.

Doulas have long been an integral part of the birthing process for many women, particularly women of color, and evidence suggests the supportive care they provide helps to improve outcomes. In fact, several states – including Oregon, Minnesota, and New York, among others – have expanded or have proposed expanding Medicaid coverage to include doula services for pregnant beneficiaries, a move cheered by doula associations and other maternal health advocates.

In many ways, it’s about “respectful maternity care,” which is something Dr. Crear-Perry has been working to promote through the NBEC in partnership with ACOG and the Robert Wood Johnson Foundation. It’s also something the World Health Organization has promoted by establishing global standards for such care.

“We’re hoping to socialize that as a norm in United States ... to really see what it would look like to value what birthing people want and to see them as partners in their birth,” she said.

However, the 2019 Giving Voice to Mothers study demonstrating consistently higher rates of mistreatment during obstetrical care for women of color than for comparable white women shows that the United States is falling short of those standards. The national study of 2,700 women examined how race, ethnicity, and place of birth interact with the experience of receiving maternity care in the United States, and showed that 1 in 6 experienced one or more types of mistreatment – with consistently higher rates among women of color, even after adjusting for interactions between race and other maternal characteristics, Saraswathi Veda, MD, of the Birth Place Lab and professor of midwifery at the University of British Columbia, Vancouver, and colleagues reported in Reproductive Health.
 

Solution: Listening, learning, reflecting, partnering

Timoria McQueen Saba, birth trauma survivor and maternal health advocate, has described experiencing instances of mistreatment throughout her obstetric care, and like Dr. Crear-Perry, she said trust and collaboration in care is imperative for improving outcomes.

“I think the most important thing you can do is really consider a patient a partner in the care you give them,” she said during a panel discussion at the 2019 ACOG annual meeting. “You’re not experts in their lived experience ... center a patient’s voice or the voice of a patient’s family. Incorporate that into your learning.”

During a virtual workshop held May 19-20 by the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Judette Louis, MD, chair of the department of obstetrics and gynecology at the University of South Florida, Tampa, and president of the Society of Maternal-Fetal Medicine, provided practical guidance for addressing racism and implicit bias in practice and in research to reduce disparities in outcomes.

In an interview, she summarized her key points, reiterating solutions proposed by Dr. Gee and Dr. Crear-Perry and addressed in the Momnibus Act, and also offering a few others:

First, put aside the notion that disparities are genetically driven. For a variety of reasons, that just doesn’t make sense. For one thing, not all blacks are African American.

“My family is from the Caribbean,” she said. “Is it really conceivable that we’re all so similar?”

Look also at the disparities among Native Americans, she said. “How can you take 500 distinct tribes that live across a wide geographic area and lump them into one group and assume that they are similar?”

The problem is racism, not race. “When you keep saying ‘it’s about race, it’s about race, it’s about race’ – that sends a message to the person who is of that race that there is something inherently broken about [them],” she said.

Recognize that the roots of the problem run deep. Learn about and support efforts to address the underlying structural factors that contribute to the problem, Dr. Louis emphasized, and recognize your own bias. “We all have it. The key is to recognize [biases] and mitigate them when taking care of patients.”

That’s easier said than done, at least judging by one survey of maternal-fetal medicine specialists in which 84% of respondents agreed that disparities impact practice, but only 29% agreed their own personal biases affect how they care for patients, she noted.

Tools are available to help individuals identify implicit bias, and training programs for health care providers can help, as well, she said. Implicit bias tests and training programs that help to identify and address bias and racism on individual and organizational levels are increasingly available through academic centers, health systems, and advocacy organizations.

Hope for solutions: Progress and promise

Like Dr. Crear-Perry, Dr. Louis sees hope for reducing disparities and improving maternal outcomes.

In another survey of SMFM members to identify the practice issues most important to them, racial disparities ranked in the top three.

“It says a lot that our [maternal-fetal medicine specialists] really see this as a problem and they want it fixed,” she said. “And I think it says that a lot of people need to work on this, not just us.”

Indeed, many are engaged in that work. Veronica Gillispie, MD, medical director of the Louisiana Perinatal Quality Collaborative and Pregnancy-Associated Mortality Review, has been instrumental in recent initiatives to improve maternal outcomes in Louisiana, and she too said she feels optimistic.

“I am hopeful and I do see signs of hope,” she said in an interview.

Teams that she works with and trains seem invested, institutions are increasingly implementing faculty training on racism and bias, and Oschner Health, where Dr. Gillispie practices as an ob.gyn., appointed its first chief diversity officer in February.

Medical students she works with are attuned to the issues of racism, bias, and disparities, and they show a desire to enact change, she said. “They already get it, and they are working to make it better.”

Dr. Crear-Perry also predicts practice-changing results from studies looking at the delivery of obstetrical care and the role of supportive care, and she pointed out another aspect of the COVID-19 crisis that provides an important lesson for health care providers who care for birthing people: the scarcity of personal protective equipment amid the pandemic.

“My friends who are ob.gyns., who are now not getting access to the things they need to stay safe to practice medicine and who are feeling very marginalized at this moment, feeling not valued – that’s how birthing people [of color] feel,” she said. “I’m hoping that builds a sense of empathy.

”I’m hoping at the end of this crisis, that those ob.gyns. will think of patients as allies in fighting for more access to health for everybody and for more resources to do their work,” Dr. Crear-Perry said. “We’re all in this together.”

[email protected]

This is the second of a two-part article on the role of racism and bias in the U.S. maternal mortality crisis and part of an ongoing Ob.Gyn. News feature series on the crisis. Part one of the story explored existing data, societal factors, and patient experiences related to structural racism, overt racism, and implicit bias as factors contributing to racial disparities in maternal outcomes. Here we explore potential solutions for addressing the inequities as proposed by thought leaders and key stakeholders.



The emerging racial disparities in COVID-19 incidence and outcomes in the United States are on a collision course with long-standing racial disparities in U.S. maternal care and mortality.

Maternal health advocates are bracing for the impact, but in the spotlight that the pandemic is training on the inequities and the health system changes taking shape in its wake, some also see hope for a shift in at least one important driver of the racial health disparities: access to care.

Non-Hispanic black women are at least three times more likely than Hispanic women and non-Hispanic white women to experience pregnancy-related death, and indigenous women are more than twice as likely, according to the latest data from the Centers for Disease Control and Prevention’s National Center for Health Statistics. The added strain COVID-19 is putting on the system stands to further limit the access to care that many pregnant women of color experience and to exacerbate racial disparities, panelists agreed during a recent National Maternal Health Patient Centered Outcomes Research Network webinar entitled “The Impact of COVID-19 on Black, Brown, and Native Pregnant People.”

“The saying is that ‘the virus doesn’t discriminate,’ but it understands our biases, right? So, the virus takes advantage of the weaknesses in our system,” said panelist Joia A. Crear-Perry, MD, an ob.gyn. and founder and president of the National Birth Equity Collaborative (NBEC), a New Orleans–based research, training, and advocacy organization working to optimize black maternal and infant health.
 

Hope for solutions from the ashes of a pandemic

The weaknesses in the system that Dr. Crear-Perry spoke of are in many ways a product of structural racism as described in a conceptual report in The Lancet, titled “America: Equity and Equality in Health,” which dug into the entrenched and tangled historical roots of racist sociological and political factors that formed a foundation for health inequity over time.

Today, people of color remain more likely to be excluded from access to health insurance and adequate health care. The authors defined structural racism as “the totality of ways in which societies foster racial discrimination through mutually reinforcing systems of housing, education, employment, earnings, benefits, credit, media, health care, and criminal justice.” Today, largely as a result of these “reinforcing systems,” people of color remain more likely to be excluded from access to health insurance and adequate health care. At the same time, and for the same reasons, they are more likely to work in the service industry, be essential workers, and use mass transit, each of which increases the risk of exposure to COVID-19, Dr. Crear-Perry explained.

“It’s important for us to know that, for maternal mortality, it’s the same thing that happens,” she said. That means the focus on COVID-19–related disparities helps magnify and elevate the conversation regarding similar disparities in maternal outcomes.

It also means that some of the care delivery solutions embraced and facilitated amid the pandemic, such as extension of Medicaid coverage for up to a year after giving birth and broader use and insurance coverage of telemedicine, could finally gain traction; those are solutions long-sought by advocates like Dr. Crear-Perry and others as a means for alleviating racial disparities in maternal outcomes and addressing the maternal mortality crisis.

Therein lies the hope, she explained in an interview. “Some of the policies that we know would have been helpful prior to COVID-19 now are being seen as really important.”
 

Solution: Extending coverage

During a May 7 virtual Congressional hearing on “America’s Two Public Health Crises: The Impact of COVID-19 on Racial Inequities and Maternal Mortality in the U.S.,” cosponsored by the American College of Obstetricians and Gynecologists, the March of Dimes, and the NBEC, Dr. Crear-Perry further explained the importance of extended coverage and care access.

Asked what Congress could do immediately to “ensure that the pandemic does not compound the nation’s maternal mortality crisis, including unacceptable rates among black women,” she didn’t hesitate.

“Well, it would be amazing if we could get Medicaid extended for 12 months post delivery,” she said. “As you can imagine right now, we have moms who are birthing in hospitals where they have to worry about, 2 months later, not having coverage for themselves.”

If that mom is exposed to COVID-19 and has no insurance coverage and a newborn at home, the likelihood that she will call a provider if she develops symptoms is low, Dr. Crear-Perry said. “This is a great opportunity for us to really rethink some of those policies that we know are barriers, that we have created for people to be able to thrive after they have a baby and during child birth.”

Current policies are centered around an arbitrary cutoff of about 6 weeks for postpartum care, but the CDC reports that a third of all postpartum deaths occur between 1 week and 12 months after birth.

“We need our policies to reflect the current knowledge and the science,” she said. “Just like babies have automatic insurance coverage for a year later, mothers should have the same.”

Medicaid finances nearly half of all births in the United States, according to a 2019 Kaiser Family Foundation brief, which explained that federal law requires Medicaid coverage for only 60 days post partum for women who are eligible. Decisions regarding coverage after 60 days are determined by individual states; those that expanded Medicaid under the Affordable Care Act typically allow extended coverage – but only with reapplication at 60 days.

Many women in nonexpansion states become uninsured after pregnancy-related coverage ends, as do some in expansion states for whom reapplying is a hurdle too high to clear with a newborn baby to care for at home, Dr. Crear-Perry said.

Addressing these coverage gaps is key to improving access, and it is a core component of the Black Maternal Health Momnibus Act of 2020, a nine-bill package introduced in March by Rep. Lauren Underwood (D-Ill.), Rep. Alma Adams (D-N.C.), Sen. Kamala Harris (D-Calif.), and members of the Black Maternal Health Caucus to “fill gaps in existing legislation to comprehensively address every dimension of the Black maternal health crisis in America.”

One bill in the package addresses extended coverage with a goal to “promote innovative payment models to incentivize high-quality maternity care and continuity of health insurance coverage from pregnancy through labor and delivery and up to 1 year post partum.” Another focuses on promoting alternative ways to access care, such as through telemedicine.

Solution: Expanding care access

“There is a need for the democratization of care,” Dr. Crear-Perry said. “There is a need for people to have more ways to get care. This idea that the only way you can get prenatal care is you have to come to me at my office, has been a burden for working people for a long, long time.”

The COVID-19 pandemic necessitates increased use of telemedicine, but building blocks to allow patients to use it effectively must be put in place, she said. That means expanding broadband access, providing patients with blood pressure cuffs and other tools for use remotely, and expanding reimbursement to include not just video, but also phone calls.

Heart Safe Motherhood, a University of Pennsylvania text-based intervention developed to address postpartum hypertension – a leading cause of maternal morbidity and mortality, and at the start of the program, the leading cause of 7-day readmissions among obstetric patients, demonstrated the value of such approaches to care.

The program involves remote blood pressure monitoring using a digital monitor provided to at-risk patients at discharge. Text-based monitoring reminders encourage patients to check their blood pressure twice daily for the first 7 days.

“In our randomized, controlled trial, we saw our ability to meet ACOG guidelines on postpartum blood monitoring leap from 0% to 82%, compared to in-person office visits and 7-day readmissions from hypertension drop from 3% to 0%,” an update at the program website states.

ACOG

Rebekah Gee, MD, an ob.gyn. and director of the Louisiana State University Health System in New Orleans, also noted the importance of finding ways to deliver care “that are outside the traditional norm.

“Telemedicine, home visiting ... I think there are a wide variety of ways,” she said, noting that these kind of approaches not only help circumvent roadblocks to care, such as lack of transportation, but also can feel more personal and approachable for some women.
 

Solution: Measuring, investing, diversifying, respecting

The aims of other bills in the Momnibus Act also mirror several solutions proposed by maternal health advocates interviewed for this article. Among them are:

• Development of improved data collection processes and quality measures to better understand the factors that contribute to the crisis overall and among special populations, and to inform solutions for addressing them.
• Investments in social determinants of health that influence maternal health outcomes, like housing, transportation, and nutrition.
• Commitment to the growth and diversification of the perinatal workforce to ensure that every mom receives maternity care and support from people she can trust to provide quality care and treat her with respect.

The latter is one that Dr. Gee, Dr. Crear-Perry, and others particularly emphasized.

“We need patient advocates like doulas, midwives and others who are better listeners and better able to advocate for patients,” Dr. Gee said. This would better allow for women’s desires in the childbirth experience to be addressed appropriately, she said, adding that this is something that “frankly, a lot of doctors do not have the time to do.”

That’s why the efforts to address maternal mortality have to focus on the health care system, not just on doctors’ behavior with respect to bias, she said.

Dr. Gee also said there is a need for culturally appropriate literacy and numeracy communications “that respect how people seek and understand information.” This varies by population, which is why it’s important to provide the same approach to care “no matter what the patient looks like,” while also understanding that different patients communicate in different ways.

A 2019 study published in Social Science & Medicine underscored how communication differences can affect outcomes; using a national sample of women who gave birth in U.S. hospitals, the authors found that those who had declined care for themselves or their infant during their childbirth hospitalization were more likely to report receiving poor treatment based on race or ethnicity. They concluded that, in the context of childbirth care, women – particularly black women – pay a penalty for what is perceived as uncooperative behavior.

This is another area where doulas and other patient advocates can help, Dr. Gee said.

Doulas have long been an integral part of the birthing process for many women, particularly women of color, and evidence suggests the supportive care they provide helps to improve outcomes. In fact, several states – including Oregon, Minnesota, and New York, among others – have expanded or have proposed expanding Medicaid coverage to include doula services for pregnant beneficiaries, a move cheered by doula associations and other maternal health advocates.

In many ways, it’s about “respectful maternity care,” which is something Dr. Crear-Perry has been working to promote through the NBEC in partnership with ACOG and the Robert Wood Johnson Foundation. It’s also something the World Health Organization has promoted by establishing global standards for such care.

“We’re hoping to socialize that as a norm in United States ... to really see what it would look like to value what birthing people want and to see them as partners in their birth,” she said.

However, the 2019 Giving Voice to Mothers study demonstrating consistently higher rates of mistreatment during obstetrical care for women of color than for comparable white women shows that the United States is falling short of those standards. The national study of 2,700 women examined how race, ethnicity, and place of birth interact with the experience of receiving maternity care in the United States, and showed that 1 in 6 experienced one or more types of mistreatment – with consistently higher rates among women of color, even after adjusting for interactions between race and other maternal characteristics, Saraswathi Veda, MD, of the Birth Place Lab and professor of midwifery at the University of British Columbia, Vancouver, and colleagues reported in Reproductive Health.
 

Solution: Listening, learning, reflecting, partnering

Timoria McQueen Saba, birth trauma survivor and maternal health advocate, has described experiencing instances of mistreatment throughout her obstetric care, and like Dr. Crear-Perry, she said trust and collaboration in care is imperative for improving outcomes.

“I think the most important thing you can do is really consider a patient a partner in the care you give them,” she said during a panel discussion at the 2019 ACOG annual meeting. “You’re not experts in their lived experience ... center a patient’s voice or the voice of a patient’s family. Incorporate that into your learning.”

During a virtual workshop held May 19-20 by the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Judette Louis, MD, chair of the department of obstetrics and gynecology at the University of South Florida, Tampa, and president of the Society of Maternal-Fetal Medicine, provided practical guidance for addressing racism and implicit bias in practice and in research to reduce disparities in outcomes.

In an interview, she summarized her key points, reiterating solutions proposed by Dr. Gee and Dr. Crear-Perry and addressed in the Momnibus Act, and also offering a few others:

First, put aside the notion that disparities are genetically driven. For a variety of reasons, that just doesn’t make sense. For one thing, not all blacks are African American.

“My family is from the Caribbean,” she said. “Is it really conceivable that we’re all so similar?”

Look also at the disparities among Native Americans, she said. “How can you take 500 distinct tribes that live across a wide geographic area and lump them into one group and assume that they are similar?”

The problem is racism, not race. “When you keep saying ‘it’s about race, it’s about race, it’s about race’ – that sends a message to the person who is of that race that there is something inherently broken about [them],” she said.

Recognize that the roots of the problem run deep. Learn about and support efforts to address the underlying structural factors that contribute to the problem, Dr. Louis emphasized, and recognize your own bias. “We all have it. The key is to recognize [biases] and mitigate them when taking care of patients.”

That’s easier said than done, at least judging by one survey of maternal-fetal medicine specialists in which 84% of respondents agreed that disparities impact practice, but only 29% agreed their own personal biases affect how they care for patients, she noted.

Tools are available to help individuals identify implicit bias, and training programs for health care providers can help, as well, she said. Implicit bias tests and training programs that help to identify and address bias and racism on individual and organizational levels are increasingly available through academic centers, health systems, and advocacy organizations.

Hope for solutions: Progress and promise

Like Dr. Crear-Perry, Dr. Louis sees hope for reducing disparities and improving maternal outcomes.

In another survey of SMFM members to identify the practice issues most important to them, racial disparities ranked in the top three.

“It says a lot that our [maternal-fetal medicine specialists] really see this as a problem and they want it fixed,” she said. “And I think it says that a lot of people need to work on this, not just us.”

Indeed, many are engaged in that work. Veronica Gillispie, MD, medical director of the Louisiana Perinatal Quality Collaborative and Pregnancy-Associated Mortality Review, has been instrumental in recent initiatives to improve maternal outcomes in Louisiana, and she too said she feels optimistic.

“I am hopeful and I do see signs of hope,” she said in an interview.

Teams that she works with and trains seem invested, institutions are increasingly implementing faculty training on racism and bias, and Oschner Health, where Dr. Gillispie practices as an ob.gyn., appointed its first chief diversity officer in February.

Medical students she works with are attuned to the issues of racism, bias, and disparities, and they show a desire to enact change, she said. “They already get it, and they are working to make it better.”

Dr. Crear-Perry also predicts practice-changing results from studies looking at the delivery of obstetrical care and the role of supportive care, and she pointed out another aspect of the COVID-19 crisis that provides an important lesson for health care providers who care for birthing people: the scarcity of personal protective equipment amid the pandemic.

“My friends who are ob.gyns., who are now not getting access to the things they need to stay safe to practice medicine and who are feeling very marginalized at this moment, feeling not valued – that’s how birthing people [of color] feel,” she said. “I’m hoping that builds a sense of empathy.

”I’m hoping at the end of this crisis, that those ob.gyns. will think of patients as allies in fighting for more access to health for everybody and for more resources to do their work,” Dr. Crear-Perry said. “We’re all in this together.”

[email protected]

Poziotinib, a pan-EGFR inhibitor, shrank tumors in a majority of patients with previously treated non–small cell lung cancer and EGFR exon 20 insertion mutations, but most of these patients did not achieve a response in the ongoing phase 2 ZENITH20 study.

The overall response rate (ORR) in the 115 patients was 14.8%, according to Xiuning Le, MD, PhD, of MD Anderson Cancer Center in Houston, who reported these results at the AACR virtual meeting I.

The ORR fell short of the greater than 17% required to meet the primary endpoint, but 65% of patients experienced tumor shrinkage, Dr. Le noted.

Overall, 17 patients had a confirmed partial response, 5 had an unconfirmed partial response, and 62 had stable disease, for a disease control rate of 68.7%.

Responses occurred early and were durable, Dr. Le said. The median duration of response was 7.4 months.

Responses were also consistent across subgroups based on the number of prior lines of therapy and prior EGFR tyrosine kinase inhibitor (TKI) therapy.

The median progression-free survival was 4.2 months.
 

Patients, treatment, and safety

The patients, who were enrolled in the first cohort of the ZENITH20 study, had a median age of 61 years. They had received a median of two prior therapies, with most having received both chemotherapy and immunotherapy.

Poziotinib was given at a once-daily dose of 16 mg for 28-day cycles, with follow-up of 24 months. Dose reductions were allowed for adverse events (AEs).

AEs were on target and consistent with EGFR TKI class effects. The most common AEs were rash, diarrhea, stomatitis, and paronychia.

Grade 3 AEs included rash (28%) and diarrhea (25%). No grade 5 treatment-related AEs occurred.

Dose reductions were common, occurring in 68% of patients. The median relative poziotinib dose intensity was 72%, suggesting that response can be maintained at lower dose levels, Dr. Le said.

Drug interruptions were also common, occurring in 88% of patients. Ten percent of patients discontinued treatment permanently, Dr. Le said, noting that this is consistent with findings in prior large trials of second-generation TKIs.
 

Implications

The results of this study are of note because EGFR is a known driver of NSCLC, Dr. Le said. She explained that, while effective treatments exist for more common EGFR mutations, such as the classic sensitizing exon 21 mutation L858R and exon 19 deletion, no approved targeted therapies are available for the approximately 10% of lung cancer patients whose tumors harbor EGFR exon 20 insertions.

“Those EGFR exon 20 insertions are not sensitive to most of the approved EGFR inhibitors,” Dr. Le said. She noted that, in one study, the median progression-free survival following treatment with an approved agent was 14 months in patients with classical mutations, compared with 2 months in those with exon 20 insertions.

The difference is attributable to molecular structural differences. Exon 20 insertions create a smaller and more shallow EGFR protein interaction surface, Dr. Le explained. “So some of the approved inhibitors don’t fit well into the oncogenic molecule,” she said.

Poziotinib has a small size and shape that can fit into the binding pocket of exon 20, and that, along with its mechanism of action, made it a promising candidate for this population, Dr. Le said. She referenced a study of 44 patients at MD Anderson Cancer Center in which poziotinib produced an ORR of 43%.

In the current study, “[p]oziotinib has further demonstrated clinical activity in previously treated lung cancer patients with EGFR exon 20 insertions ... with a toxicity profile similar to that of other second-generation TKIs,” she said.

The findings underscore the promise of EGFR exon 20 insertions as targets for therapeutic intervention, said invited discussant Taofeek Owonikoko, MD, PhD, of Winship Cancer Institute of Emory University in Atlanta.

“Poziotinib showed modest but meaningful efficacy,” he said. “However, its safety remains a challenge. It is expected that ongoing modifications in the dosing schedule will make it a more tolerable agent.”

“Future studies to systematically explore differential sensitivity of various exon 20 insertion mutations by location will be informative, as will [elucidation of] mechanisms of resistance to prioritize combinatorial strategies to further enhance the efficacy of this drug,” Dr. Owonikoko added.
 

Next steps

Analyses of other cohorts in the ZENITH20 trial will be reported at upcoming conferences as the data mature, Dr. Le noted. Cohorts 2-4 include patients with previously treated HER2 exon 20 insertions and treatment-naive patients with EGFR and HER2 exon 20 insertions, respectively.

Additionally, three new cohorts are being added, including one with patients who have EGFR or HER2 exon 20 insertions, one with EGFR patients who failed prior osimertinib treatment, and one with patients who have atypical EGFR or HER2 mutations.

Rather than the once-daily dosing used in cohorts 1-4, twice-daily dosing will be evaluated in these cohorts, Dr. Le said, explaining that the half-life of poziotinib is about 8 hours.

“Recent pharmacological modeling showed that a [twice-daily] regimen would reduce the maximal serum concentration and increase trough, which could lead to optimized drug coverage,” she said. “This may potentially reduce toxicity and improve patient compliance and efficacy.”

ZENITH20 is sponsored by Spectrum Pharmaceuticals Inc. Dr. Le disclosed relationships with Spectrum as well as Eli Lilly, AstraZeneca, EMD Serono, and Boehringer Ingelheim. Dr. Owonikoko disclosed relationships with many companies, not including Spectrum.

[email protected]

SOURCE: Le X et al. AACR 2020, Abstract CT081.

Poziotinib, a pan-EGFR inhibitor, shrank tumors in a majority of patients with previously treated non–small cell lung cancer and EGFR exon 20 insertion mutations, but most of these patients did not achieve a response in the ongoing phase 2 ZENITH20 study.

The overall response rate (ORR) in the 115 patients was 14.8%, according to Xiuning Le, MD, PhD, of MD Anderson Cancer Center in Houston, who reported these results at the AACR virtual meeting I.

The ORR fell short of the greater than 17% required to meet the primary endpoint, but 65% of patients experienced tumor shrinkage, Dr. Le noted.

Overall, 17 patients had a confirmed partial response, 5 had an unconfirmed partial response, and 62 had stable disease, for a disease control rate of 68.7%.

Responses occurred early and were durable, Dr. Le said. The median duration of response was 7.4 months.

Responses were also consistent across subgroups based on the number of prior lines of therapy and prior EGFR tyrosine kinase inhibitor (TKI) therapy.

The median progression-free survival was 4.2 months.
 

Patients, treatment, and safety

The patients, who were enrolled in the first cohort of the ZENITH20 study, had a median age of 61 years. They had received a median of two prior therapies, with most having received both chemotherapy and immunotherapy.

Poziotinib was given at a once-daily dose of 16 mg for 28-day cycles, with follow-up of 24 months. Dose reductions were allowed for adverse events (AEs).

AEs were on target and consistent with EGFR TKI class effects. The most common AEs were rash, diarrhea, stomatitis, and paronychia.

Grade 3 AEs included rash (28%) and diarrhea (25%). No grade 5 treatment-related AEs occurred.

Dose reductions were common, occurring in 68% of patients. The median relative poziotinib dose intensity was 72%, suggesting that response can be maintained at lower dose levels, Dr. Le said.

Drug interruptions were also common, occurring in 88% of patients. Ten percent of patients discontinued treatment permanently, Dr. Le said, noting that this is consistent with findings in prior large trials of second-generation TKIs.
 

Implications

The results of this study are of note because EGFR is a known driver of NSCLC, Dr. Le said. She explained that, while effective treatments exist for more common EGFR mutations, such as the classic sensitizing exon 21 mutation L858R and exon 19 deletion, no approved targeted therapies are available for the approximately 10% of lung cancer patients whose tumors harbor EGFR exon 20 insertions.

“Those EGFR exon 20 insertions are not sensitive to most of the approved EGFR inhibitors,” Dr. Le said. She noted that, in one study, the median progression-free survival following treatment with an approved agent was 14 months in patients with classical mutations, compared with 2 months in those with exon 20 insertions.

The difference is attributable to molecular structural differences. Exon 20 insertions create a smaller and more shallow EGFR protein interaction surface, Dr. Le explained. “So some of the approved inhibitors don’t fit well into the oncogenic molecule,” she said.

Poziotinib has a small size and shape that can fit into the binding pocket of exon 20, and that, along with its mechanism of action, made it a promising candidate for this population, Dr. Le said. She referenced a study of 44 patients at MD Anderson Cancer Center in which poziotinib produced an ORR of 43%.

In the current study, “[p]oziotinib has further demonstrated clinical activity in previously treated lung cancer patients with EGFR exon 20 insertions ... with a toxicity profile similar to that of other second-generation TKIs,” she said.

The findings underscore the promise of EGFR exon 20 insertions as targets for therapeutic intervention, said invited discussant Taofeek Owonikoko, MD, PhD, of Winship Cancer Institute of Emory University in Atlanta.

“Poziotinib showed modest but meaningful efficacy,” he said. “However, its safety remains a challenge. It is expected that ongoing modifications in the dosing schedule will make it a more tolerable agent.”

“Future studies to systematically explore differential sensitivity of various exon 20 insertion mutations by location will be informative, as will [elucidation of] mechanisms of resistance to prioritize combinatorial strategies to further enhance the efficacy of this drug,” Dr. Owonikoko added.
 

Next steps

Analyses of other cohorts in the ZENITH20 trial will be reported at upcoming conferences as the data mature, Dr. Le noted. Cohorts 2-4 include patients with previously treated HER2 exon 20 insertions and treatment-naive patients with EGFR and HER2 exon 20 insertions, respectively.

Additionally, three new cohorts are being added, including one with patients who have EGFR or HER2 exon 20 insertions, one with EGFR patients who failed prior osimertinib treatment, and one with patients who have atypical EGFR or HER2 mutations.

Rather than the once-daily dosing used in cohorts 1-4, twice-daily dosing will be evaluated in these cohorts, Dr. Le said, explaining that the half-life of poziotinib is about 8 hours.

“Recent pharmacological modeling showed that a [twice-daily] regimen would reduce the maximal serum concentration and increase trough, which could lead to optimized drug coverage,” she said. “This may potentially reduce toxicity and improve patient compliance and efficacy.”

ZENITH20 is sponsored by Spectrum Pharmaceuticals Inc. Dr. Le disclosed relationships with Spectrum as well as Eli Lilly, AstraZeneca, EMD Serono, and Boehringer Ingelheim. Dr. Owonikoko disclosed relationships with many companies, not including Spectrum.

[email protected]

SOURCE: Le X et al. AACR 2020, Abstract CT081.

Poziotinib, a pan-EGFR inhibitor, shrank tumors in a majority of patients with previously treated non–small cell lung cancer and EGFR exon 20 insertion mutations, but most of these patients did not achieve a response in the ongoing phase 2 ZENITH20 study.

The overall response rate (ORR) in the 115 patients was 14.8%, according to Xiuning Le, MD, PhD, of MD Anderson Cancer Center in Houston, who reported these results at the AACR virtual meeting I.

The ORR fell short of the greater than 17% required to meet the primary endpoint, but 65% of patients experienced tumor shrinkage, Dr. Le noted.

Overall, 17 patients had a confirmed partial response, 5 had an unconfirmed partial response, and 62 had stable disease, for a disease control rate of 68.7%.

Responses occurred early and were durable, Dr. Le said. The median duration of response was 7.4 months.

Responses were also consistent across subgroups based on the number of prior lines of therapy and prior EGFR tyrosine kinase inhibitor (TKI) therapy.

The median progression-free survival was 4.2 months.
 

Patients, treatment, and safety

The patients, who were enrolled in the first cohort of the ZENITH20 study, had a median age of 61 years. They had received a median of two prior therapies, with most having received both chemotherapy and immunotherapy.

Poziotinib was given at a once-daily dose of 16 mg for 28-day cycles, with follow-up of 24 months. Dose reductions were allowed for adverse events (AEs).

AEs were on target and consistent with EGFR TKI class effects. The most common AEs were rash, diarrhea, stomatitis, and paronychia.

Grade 3 AEs included rash (28%) and diarrhea (25%). No grade 5 treatment-related AEs occurred.

Dose reductions were common, occurring in 68% of patients. The median relative poziotinib dose intensity was 72%, suggesting that response can be maintained at lower dose levels, Dr. Le said.

Drug interruptions were also common, occurring in 88% of patients. Ten percent of patients discontinued treatment permanently, Dr. Le said, noting that this is consistent with findings in prior large trials of second-generation TKIs.
 

Implications

The results of this study are of note because EGFR is a known driver of NSCLC, Dr. Le said. She explained that, while effective treatments exist for more common EGFR mutations, such as the classic sensitizing exon 21 mutation L858R and exon 19 deletion, no approved targeted therapies are available for the approximately 10% of lung cancer patients whose tumors harbor EGFR exon 20 insertions.

“Those EGFR exon 20 insertions are not sensitive to most of the approved EGFR inhibitors,” Dr. Le said. She noted that, in one study, the median progression-free survival following treatment with an approved agent was 14 months in patients with classical mutations, compared with 2 months in those with exon 20 insertions.

The difference is attributable to molecular structural differences. Exon 20 insertions create a smaller and more shallow EGFR protein interaction surface, Dr. Le explained. “So some of the approved inhibitors don’t fit well into the oncogenic molecule,” she said.

Poziotinib has a small size and shape that can fit into the binding pocket of exon 20, and that, along with its mechanism of action, made it a promising candidate for this population, Dr. Le said. She referenced a study of 44 patients at MD Anderson Cancer Center in which poziotinib produced an ORR of 43%.

In the current study, “[p]oziotinib has further demonstrated clinical activity in previously treated lung cancer patients with EGFR exon 20 insertions ... with a toxicity profile similar to that of other second-generation TKIs,” she said.

The findings underscore the promise of EGFR exon 20 insertions as targets for therapeutic intervention, said invited discussant Taofeek Owonikoko, MD, PhD, of Winship Cancer Institute of Emory University in Atlanta.

“Poziotinib showed modest but meaningful efficacy,” he said. “However, its safety remains a challenge. It is expected that ongoing modifications in the dosing schedule will make it a more tolerable agent.”

“Future studies to systematically explore differential sensitivity of various exon 20 insertion mutations by location will be informative, as will [elucidation of] mechanisms of resistance to prioritize combinatorial strategies to further enhance the efficacy of this drug,” Dr. Owonikoko added.
 

Next steps

Analyses of other cohorts in the ZENITH20 trial will be reported at upcoming conferences as the data mature, Dr. Le noted. Cohorts 2-4 include patients with previously treated HER2 exon 20 insertions and treatment-naive patients with EGFR and HER2 exon 20 insertions, respectively.

Additionally, three new cohorts are being added, including one with patients who have EGFR or HER2 exon 20 insertions, one with EGFR patients who failed prior osimertinib treatment, and one with patients who have atypical EGFR or HER2 mutations.

Rather than the once-daily dosing used in cohorts 1-4, twice-daily dosing will be evaluated in these cohorts, Dr. Le said, explaining that the half-life of poziotinib is about 8 hours.

“Recent pharmacological modeling showed that a [twice-daily] regimen would reduce the maximal serum concentration and increase trough, which could lead to optimized drug coverage,” she said. “This may potentially reduce toxicity and improve patient compliance and efficacy.”

ZENITH20 is sponsored by Spectrum Pharmaceuticals Inc. Dr. Le disclosed relationships with Spectrum as well as Eli Lilly, AstraZeneca, EMD Serono, and Boehringer Ingelheim. Dr. Owonikoko disclosed relationships with many companies, not including Spectrum.

[email protected]

SOURCE: Le X et al. AACR 2020, Abstract CT081.

Neither fulvestrant alone nor fulvestrant plus anastrozole improved the endocrine-sensitive disease rate (ESDR) versus anastrozole alone as neoadjuvant endocrine therapy in postmenopausal women with locally advanced estrogen receptor-positive HER2-negative (ER+ HER2–) breast cancer in the phase 3 ALTERNATE trial.

The ESDRs were 22.7% in 431 evaluable patients randomized to receive fulvestrant alone, 20.5% in 434 patients who received fulvestrant + anastrozole, and 18.6% in 434 who received anastrozole alone, Cynthia X. Ma, MD, PhD, reported as part of the American Society of Clinical Oncology virtual scientific program.

The differences between the anastrozole-only and the fulvestrant groups did not differ significantly, said Dr. Ma, a professor at Washington University in St. Louis.

Study subjects had a median age of 64 years, clinical stage II/III ER+ HER2– breast cancer, and were randomized 1:1:1 between February 2014 and November 2018 to receive 6 months of treatment with 500 mg of intramuscular fulvestrant given every 4 weeks following a loading dose, fulvestrant plus a 1 mg daily oral does of anastrozole, or anastrozole alone prior to breast conserving surgery.

The groups were similar with respect to baseline characteristics, and more than 70% were eligible for breast conserving surgery prior to the start of neoadjuvant therapy, Dr. Ma noted, adding that the treatments were well tolerated.

Grade 3 or 4 adverse events were rare, and the percentage of patients experiencing arthralgia, myalgia, or hot flashes was low and similar across arms, she said.

“Neoadjuvant therapy downstages the tumor and improves the rate of breast conserving surgery,” Dr. Ma said, adding that pathologic tumor size, nodal status, Ki67 level, and ER status of resected tumors after neoadjuvant therapy have been shown to be independent prognostic factors for relapse-free survival.

[email protected]

SOURCE: Ma C et al. ASCO 2020: Abstract 504.

Neither fulvestrant alone nor fulvestrant plus anastrozole improved the endocrine-sensitive disease rate (ESDR) versus anastrozole alone as neoadjuvant endocrine therapy in postmenopausal women with locally advanced estrogen receptor-positive HER2-negative (ER+ HER2–) breast cancer in the phase 3 ALTERNATE trial.

The ESDRs were 22.7% in 431 evaluable patients randomized to receive fulvestrant alone, 20.5% in 434 patients who received fulvestrant + anastrozole, and 18.6% in 434 who received anastrozole alone, Cynthia X. Ma, MD, PhD, reported as part of the American Society of Clinical Oncology virtual scientific program.

The differences between the anastrozole-only and the fulvestrant groups did not differ significantly, said Dr. Ma, a professor at Washington University in St. Louis.

Study subjects had a median age of 64 years, clinical stage II/III ER+ HER2– breast cancer, and were randomized 1:1:1 between February 2014 and November 2018 to receive 6 months of treatment with 500 mg of intramuscular fulvestrant given every 4 weeks following a loading dose, fulvestrant plus a 1 mg daily oral does of anastrozole, or anastrozole alone prior to breast conserving surgery.

The groups were similar with respect to baseline characteristics, and more than 70% were eligible for breast conserving surgery prior to the start of neoadjuvant therapy, Dr. Ma noted, adding that the treatments were well tolerated.

Grade 3 or 4 adverse events were rare, and the percentage of patients experiencing arthralgia, myalgia, or hot flashes was low and similar across arms, she said.

“Neoadjuvant therapy downstages the tumor and improves the rate of breast conserving surgery,” Dr. Ma said, adding that pathologic tumor size, nodal status, Ki67 level, and ER status of resected tumors after neoadjuvant therapy have been shown to be independent prognostic factors for relapse-free survival.

[email protected]

SOURCE: Ma C et al. ASCO 2020: Abstract 504.

Neither fulvestrant alone nor fulvestrant plus anastrozole improved the endocrine-sensitive disease rate (ESDR) versus anastrozole alone as neoadjuvant endocrine therapy in postmenopausal women with locally advanced estrogen receptor-positive HER2-negative (ER+ HER2–) breast cancer in the phase 3 ALTERNATE trial.

The ESDRs were 22.7% in 431 evaluable patients randomized to receive fulvestrant alone, 20.5% in 434 patients who received fulvestrant + anastrozole, and 18.6% in 434 who received anastrozole alone, Cynthia X. Ma, MD, PhD, reported as part of the American Society of Clinical Oncology virtual scientific program.

The differences between the anastrozole-only and the fulvestrant groups did not differ significantly, said Dr. Ma, a professor at Washington University in St. Louis.

Study subjects had a median age of 64 years, clinical stage II/III ER+ HER2– breast cancer, and were randomized 1:1:1 between February 2014 and November 2018 to receive 6 months of treatment with 500 mg of intramuscular fulvestrant given every 4 weeks following a loading dose, fulvestrant plus a 1 mg daily oral does of anastrozole, or anastrozole alone prior to breast conserving surgery.

The groups were similar with respect to baseline characteristics, and more than 70% were eligible for breast conserving surgery prior to the start of neoadjuvant therapy, Dr. Ma noted, adding that the treatments were well tolerated.

Grade 3 or 4 adverse events were rare, and the percentage of patients experiencing arthralgia, myalgia, or hot flashes was low and similar across arms, she said.

“Neoadjuvant therapy downstages the tumor and improves the rate of breast conserving surgery,” Dr. Ma said, adding that pathologic tumor size, nodal status, Ki67 level, and ER status of resected tumors after neoadjuvant therapy have been shown to be independent prognostic factors for relapse-free survival.

[email protected]

SOURCE: Ma C et al. ASCO 2020: Abstract 504.

Adding the AKT inhibitor ipatasertib to paclitaxel may provide an overall survival (OS) benefit for inoperable locally advanced/metastatic triple-negative breast cancer (TNBC), according to final results of the phase 2 LOTUS trial.

The median OS was 25.8 months in patients who received ipatasertib plus paclitaxel and 16.9 months in patients who received paclitaxel plus placebo. Although this difference was not statistically significant, it was “clinically meaningful,” according to Rebecca Dent, MD, of the National Cancer Center Singapore. Dr. Dent presented OS data from the LOTUS trial at the European Society of Medical Oncology: Breast Cancer virtual meeting.

Previously reported data showed a progression-free survival benefit in the ipatasertib arm, compared with the placebo arm – 6.2 months and 4.9 months, respectively (Lancet Oncol. 2017 Oct;18[10]:1360-72). An enhanced effect was noted in patients with PIK3CA/AKT1/PTEN–altered tumors, but the OS data were not mature at the time of that primary analysis.
 

Patients, treatment, and safety

LOTUS participants had measurable locally advanced/metastatic TNBC that was previously untreated with systemic therapy, and they were stratified by prior adjuvant therapy, chemotherapy-free interval, and tumor immunohistochemistry PTEN status.

Patients were randomized 1:1 to receive paclitaxel at a dose of 80 mg/m² on days 1, 8, and 15 of each 28-day cycle plus either placebo (n = 62) or ipatasertib at a dose of 400 mg on days 1-21 (n = 62).

The safety results didn’t differ between the primary and updated results, Dr. Dent noted.

“What we can say is that the combination is extremely well tolerated, especially when we compare it to other targeted agents targeting this pathway,” she said. “What we do see is noticeable diarrhea ... [and] an increase in sensory neuropathy, which is not entirely unexpected.”

Subsequent systemic anticancer therapy was required in 77% of patients in the ipatasertib arm and 90% of patients in the placebo arm.
 

OS results

The final OS data show a numerical advantage for patients in the ipatasertib arm compared with the placebo arm. The 1-year OS was 83% in the ipatasertib arm and 68% in the placebo arm. The median OS was 25.8 months and 16.9 months, respectively (stratified hazard ratio, 0.80).

“This is a clinically meaningful improvement of 9 months in overall survival, which is indeed not too dissimilar to what we have seen in patients with PD-L1-positive TNBC who are receiving immune checkpoint inhibition in combination with chemotherapy,” Dr. Dent said.

However, the 95% confidence interval for the stratified OS hazard ratio crossed 1 (0.50-1.28). Therefore, the findings require confirmatory phase 3 trial results, Dr. Dent said.

The OS improvements with ipatasertib were seen “in all biomarker-defined subgroups – PTEN normal or low, PIK3CA/AKT1/PTEN altered or non-altered,” she said. OS benefits were more pronounced in patients with altered PIK3C/AKT1/PTEN status, but the numbers are too small to make definitive conclusions, according to Dr. Dent.
 

‘Promising’ results, confirmation needed

Invited discussant Suzette Delaloge, MD, head of the breast cancer department at Gustave Roussy, Paris, said the OS findings from LOTUS are “quite promising,” and the safety data are “reassuring.”

The findings are comparable to those of the recently published PAKT trial (J Clin Oncol. 2020 Feb 10;38[5]:423-33), she said, noting that “AKT inhibition in combination with paclitaxel deserves phase 3 development, and this is ongoing in major phase 3 trials.”

Dr. Delaloge also noted that the efficacy may not be limited to PIK3CA/AKT–altered tumors, and given the heterogeneity of TNBC – which may explain the differences seen among various studies – “it is very important that such phase 3 trials ideally involve extensive genomical definitions of tumors so that we understand what it is we are talking about and what is the real effect of the drug.”

“The adequate positioning of AKT inhibition in competition/complementation with other ongoing strategies remains to be defined,” she said. “I think these drugs are ready for translation to early phases.”

Dr. Dent said the results of LOTUS warrant confirmation in the ongoing, randomized phase 3 IPATunity130 trial , in which researchers are evaluating first-line ipatasertib plus paclitaxel for metastatic TNBC. She noted that the small sample sizes and heterogeneity of TNBC among LOTUS participants limited the interpretation of the findings.

In another trial, IPATunity170, researchers are evaluating the first-line role of ipatasertib plus paclitaxel and atezolizumab in locally advanced or metastatic TNBC.

“This is an exciting triplet combination that’s been evaluated already in the phase 1 setting, and now we have a phase 3 study evaluating the triplet,” Dr. Dent said.

The LOTUS trial was funded by Roche/Genentech. Dr. Dent reported receiving honoraria from Roche, Novartis, Lilly, Pfizer, Eisai, Merck, and AstraZeneca. Dr. Delaloge reported personal financial interests in AstraZeneca until 2018 and travel and accommodation support from AstraZeneca, Pfizer, Roche, and Pierre Fabre.

[email protected]

SOURCE: Dent R et al. ESMO Breast Cancer 2020, Abstract 139O

Adding the AKT inhibitor ipatasertib to paclitaxel may provide an overall survival (OS) benefit for inoperable locally advanced/metastatic triple-negative breast cancer (TNBC), according to final results of the phase 2 LOTUS trial.

The median OS was 25.8 months in patients who received ipatasertib plus paclitaxel and 16.9 months in patients who received paclitaxel plus placebo. Although this difference was not statistically significant, it was “clinically meaningful,” according to Rebecca Dent, MD, of the National Cancer Center Singapore. Dr. Dent presented OS data from the LOTUS trial at the European Society of Medical Oncology: Breast Cancer virtual meeting.

Previously reported data showed a progression-free survival benefit in the ipatasertib arm, compared with the placebo arm – 6.2 months and 4.9 months, respectively (Lancet Oncol. 2017 Oct;18[10]:1360-72). An enhanced effect was noted in patients with PIK3CA/AKT1/PTEN–altered tumors, but the OS data were not mature at the time of that primary analysis.
 

Patients, treatment, and safety

LOTUS participants had measurable locally advanced/metastatic TNBC that was previously untreated with systemic therapy, and they were stratified by prior adjuvant therapy, chemotherapy-free interval, and tumor immunohistochemistry PTEN status.

Patients were randomized 1:1 to receive paclitaxel at a dose of 80 mg/m² on days 1, 8, and 15 of each 28-day cycle plus either placebo (n = 62) or ipatasertib at a dose of 400 mg on days 1-21 (n = 62).

The safety results didn’t differ between the primary and updated results, Dr. Dent noted.

“What we can say is that the combination is extremely well tolerated, especially when we compare it to other targeted agents targeting this pathway,” she said. “What we do see is noticeable diarrhea ... [and] an increase in sensory neuropathy, which is not entirely unexpected.”

Subsequent systemic anticancer therapy was required in 77% of patients in the ipatasertib arm and 90% of patients in the placebo arm.
 

OS results

The final OS data show a numerical advantage for patients in the ipatasertib arm compared with the placebo arm. The 1-year OS was 83% in the ipatasertib arm and 68% in the placebo arm. The median OS was 25.8 months and 16.9 months, respectively (stratified hazard ratio, 0.80).

“This is a clinically meaningful improvement of 9 months in overall survival, which is indeed not too dissimilar to what we have seen in patients with PD-L1-positive TNBC who are receiving immune checkpoint inhibition in combination with chemotherapy,” Dr. Dent said.

However, the 95% confidence interval for the stratified OS hazard ratio crossed 1 (0.50-1.28). Therefore, the findings require confirmatory phase 3 trial results, Dr. Dent said.

The OS improvements with ipatasertib were seen “in all biomarker-defined subgroups – PTEN normal or low, PIK3CA/AKT1/PTEN altered or non-altered,” she said. OS benefits were more pronounced in patients with altered PIK3C/AKT1/PTEN status, but the numbers are too small to make definitive conclusions, according to Dr. Dent.
 

‘Promising’ results, confirmation needed

Invited discussant Suzette Delaloge, MD, head of the breast cancer department at Gustave Roussy, Paris, said the OS findings from LOTUS are “quite promising,” and the safety data are “reassuring.”

The findings are comparable to those of the recently published PAKT trial (J Clin Oncol. 2020 Feb 10;38[5]:423-33), she said, noting that “AKT inhibition in combination with paclitaxel deserves phase 3 development, and this is ongoing in major phase 3 trials.”

Dr. Delaloge also noted that the efficacy may not be limited to PIK3CA/AKT–altered tumors, and given the heterogeneity of TNBC – which may explain the differences seen among various studies – “it is very important that such phase 3 trials ideally involve extensive genomical definitions of tumors so that we understand what it is we are talking about and what is the real effect of the drug.”

“The adequate positioning of AKT inhibition in competition/complementation with other ongoing strategies remains to be defined,” she said. “I think these drugs are ready for translation to early phases.”

Dr. Dent said the results of LOTUS warrant confirmation in the ongoing, randomized phase 3 IPATunity130 trial , in which researchers are evaluating first-line ipatasertib plus paclitaxel for metastatic TNBC. She noted that the small sample sizes and heterogeneity of TNBC among LOTUS participants limited the interpretation of the findings.

In another trial, IPATunity170, researchers are evaluating the first-line role of ipatasertib plus paclitaxel and atezolizumab in locally advanced or metastatic TNBC.

“This is an exciting triplet combination that’s been evaluated already in the phase 1 setting, and now we have a phase 3 study evaluating the triplet,” Dr. Dent said.

The LOTUS trial was funded by Roche/Genentech. Dr. Dent reported receiving honoraria from Roche, Novartis, Lilly, Pfizer, Eisai, Merck, and AstraZeneca. Dr. Delaloge reported personal financial interests in AstraZeneca until 2018 and travel and accommodation support from AstraZeneca, Pfizer, Roche, and Pierre Fabre.

[email protected]

SOURCE: Dent R et al. ESMO Breast Cancer 2020, Abstract 139O

Adding the AKT inhibitor ipatasertib to paclitaxel may provide an overall survival (OS) benefit for inoperable locally advanced/metastatic triple-negative breast cancer (TNBC), according to final results of the phase 2 LOTUS trial.

The median OS was 25.8 months in patients who received ipatasertib plus paclitaxel and 16.9 months in patients who received paclitaxel plus placebo. Although this difference was not statistically significant, it was “clinically meaningful,” according to Rebecca Dent, MD, of the National Cancer Center Singapore. Dr. Dent presented OS data from the LOTUS trial at the European Society of Medical Oncology: Breast Cancer virtual meeting.

Previously reported data showed a progression-free survival benefit in the ipatasertib arm, compared with the placebo arm – 6.2 months and 4.9 months, respectively (Lancet Oncol. 2017 Oct;18[10]:1360-72). An enhanced effect was noted in patients with PIK3CA/AKT1/PTEN–altered tumors, but the OS data were not mature at the time of that primary analysis.
 

Patients, treatment, and safety

LOTUS participants had measurable locally advanced/metastatic TNBC that was previously untreated with systemic therapy, and they were stratified by prior adjuvant therapy, chemotherapy-free interval, and tumor immunohistochemistry PTEN status.

Patients were randomized 1:1 to receive paclitaxel at a dose of 80 mg/m² on days 1, 8, and 15 of each 28-day cycle plus either placebo (n = 62) or ipatasertib at a dose of 400 mg on days 1-21 (n = 62).

The safety results didn’t differ between the primary and updated results, Dr. Dent noted.

“What we can say is that the combination is extremely well tolerated, especially when we compare it to other targeted agents targeting this pathway,” she said. “What we do see is noticeable diarrhea ... [and] an increase in sensory neuropathy, which is not entirely unexpected.”

Subsequent systemic anticancer therapy was required in 77% of patients in the ipatasertib arm and 90% of patients in the placebo arm.
 

OS results

The final OS data show a numerical advantage for patients in the ipatasertib arm compared with the placebo arm. The 1-year OS was 83% in the ipatasertib arm and 68% in the placebo arm. The median OS was 25.8 months and 16.9 months, respectively (stratified hazard ratio, 0.80).

“This is a clinically meaningful improvement of 9 months in overall survival, which is indeed not too dissimilar to what we have seen in patients with PD-L1-positive TNBC who are receiving immune checkpoint inhibition in combination with chemotherapy,” Dr. Dent said.

However, the 95% confidence interval for the stratified OS hazard ratio crossed 1 (0.50-1.28). Therefore, the findings require confirmatory phase 3 trial results, Dr. Dent said.

The OS improvements with ipatasertib were seen “in all biomarker-defined subgroups – PTEN normal or low, PIK3CA/AKT1/PTEN altered or non-altered,” she said. OS benefits were more pronounced in patients with altered PIK3C/AKT1/PTEN status, but the numbers are too small to make definitive conclusions, according to Dr. Dent.
 

‘Promising’ results, confirmation needed

Invited discussant Suzette Delaloge, MD, head of the breast cancer department at Gustave Roussy, Paris, said the OS findings from LOTUS are “quite promising,” and the safety data are “reassuring.”

The findings are comparable to those of the recently published PAKT trial (J Clin Oncol. 2020 Feb 10;38[5]:423-33), she said, noting that “AKT inhibition in combination with paclitaxel deserves phase 3 development, and this is ongoing in major phase 3 trials.”

Dr. Delaloge also noted that the efficacy may not be limited to PIK3CA/AKT–altered tumors, and given the heterogeneity of TNBC – which may explain the differences seen among various studies – “it is very important that such phase 3 trials ideally involve extensive genomical definitions of tumors so that we understand what it is we are talking about and what is the real effect of the drug.”

“The adequate positioning of AKT inhibition in competition/complementation with other ongoing strategies remains to be defined,” she said. “I think these drugs are ready for translation to early phases.”

Dr. Dent said the results of LOTUS warrant confirmation in the ongoing, randomized phase 3 IPATunity130 trial , in which researchers are evaluating first-line ipatasertib plus paclitaxel for metastatic TNBC. She noted that the small sample sizes and heterogeneity of TNBC among LOTUS participants limited the interpretation of the findings.

In another trial, IPATunity170, researchers are evaluating the first-line role of ipatasertib plus paclitaxel and atezolizumab in locally advanced or metastatic TNBC.

“This is an exciting triplet combination that’s been evaluated already in the phase 1 setting, and now we have a phase 3 study evaluating the triplet,” Dr. Dent said.

The LOTUS trial was funded by Roche/Genentech. Dr. Dent reported receiving honoraria from Roche, Novartis, Lilly, Pfizer, Eisai, Merck, and AstraZeneca. Dr. Delaloge reported personal financial interests in AstraZeneca until 2018 and travel and accommodation support from AstraZeneca, Pfizer, Roche, and Pierre Fabre.

[email protected]

SOURCE: Dent R et al. ESMO Breast Cancer 2020, Abstract 139O

A novel penclomedine shows promising safety and efficacy in some adolescent and young adult patients with cancers involving the central nervous system, according to phase 1/2 clinical trial findings.

The trial included 15 patients, aged 15-39 years, with measurable cancer involving the CNS who were treated with the agent 4-Demethyl-4-cholesteryloxycarbonylpenclomedine (DM-CHOC-PEN).

Two of these patients were “in their 59th month of survival and doing well” as of April, when the data were presented at the AACR virtual meeting I.

One of the patients with long-term survival benefit had non–small cell lung cancer, and one had astrocytoma, Lee Roy Morgan, MD, PhD, chief executive officer of Dekk-Tec Inc., New Orleans, reported during a poster presentation.

Patients with glioblastoma, however, “did not do well,” said Dr. Morgan, an adjunct professor at Tulane University in New Orleans. He noted that none of the five glioblastoma patients experienced a long-term response.
 

Safety

Study subjects were treated with the maximum tolerated dose (MTD) of DM-CHOC-PEN as identified in an earlier study. Patients with liver involvement received 75 mg/m², and those without liver involvement received up to 98.7 mg/m². Dosing was by 3-hour intravenous administration once every 21 days as lab tests and subject status allowed.

DM-CHOC-PEN was generally well tolerated. One patient experienced grade 2 vasogenic edema, and another experienced seizures. Both were secondary to tumor swelling, and both resolved with tumor regression.

No grade 3 toxicities occurred at the MTD, and “no renal, hematological, hepatic, or pulmonary toxicities were noted using the MTD in this trial,” Dr. Morgan said.
 

Mechanism

DM-CHOC-PEN is a polychlorinated pyridine with a cholesteryl carbonate attachment that induces lipophilicity, which potentiates the drug’s penetration of the blood-brain barrier and its entry into the brain and brain cancers, Dr. Morgan explained.

He added that DM-CHOC-PEN is a bis-alkylator that binds to DNA’s cytosine/guanine nucleotides. The agent does not require hepatic activation, it crosses the blood-brain barrier intact, and accumulates in CNS tumors but not normal CNS tissue, he said.

Further, it “is not a substrate for [p-glycoprotein] transport; thus, it doesn’t easily get out of the brain,” Dr. Morgan said. He noted that DM-CHOC-PEN can be used with other agents, such as temozolomide and bis-chloroethylnitrosourea, because of the difference in mechanisms of action.

This study was supported by Louisiana state grants, the National Cancer Institute, the National Institute of General Medical Sciences, and the Small Business Innovation Research program. Dr. Morgan reported having no disclosures, but he is chief executive officer of Dekk-Tec Inc., which is developing DM-CHOC-PEN.

[email protected]

SOURCE: Morgan L et al. AACR 2020, Abstract CT181.

A novel penclomedine shows promising safety and efficacy in some adolescent and young adult patients with cancers involving the central nervous system, according to phase 1/2 clinical trial findings.

The trial included 15 patients, aged 15-39 years, with measurable cancer involving the CNS who were treated with the agent 4-Demethyl-4-cholesteryloxycarbonylpenclomedine (DM-CHOC-PEN).

Two of these patients were “in their 59th month of survival and doing well” as of April, when the data were presented at the AACR virtual meeting I.

One of the patients with long-term survival benefit had non–small cell lung cancer, and one had astrocytoma, Lee Roy Morgan, MD, PhD, chief executive officer of Dekk-Tec Inc., New Orleans, reported during a poster presentation.

Patients with glioblastoma, however, “did not do well,” said Dr. Morgan, an adjunct professor at Tulane University in New Orleans. He noted that none of the five glioblastoma patients experienced a long-term response.
 

Safety

Study subjects were treated with the maximum tolerated dose (MTD) of DM-CHOC-PEN as identified in an earlier study. Patients with liver involvement received 75 mg/m², and those without liver involvement received up to 98.7 mg/m². Dosing was by 3-hour intravenous administration once every 21 days as lab tests and subject status allowed.

DM-CHOC-PEN was generally well tolerated. One patient experienced grade 2 vasogenic edema, and another experienced seizures. Both were secondary to tumor swelling, and both resolved with tumor regression.

No grade 3 toxicities occurred at the MTD, and “no renal, hematological, hepatic, or pulmonary toxicities were noted using the MTD in this trial,” Dr. Morgan said.
 

Mechanism

DM-CHOC-PEN is a polychlorinated pyridine with a cholesteryl carbonate attachment that induces lipophilicity, which potentiates the drug’s penetration of the blood-brain barrier and its entry into the brain and brain cancers, Dr. Morgan explained.

He added that DM-CHOC-PEN is a bis-alkylator that binds to DNA’s cytosine/guanine nucleotides. The agent does not require hepatic activation, it crosses the blood-brain barrier intact, and accumulates in CNS tumors but not normal CNS tissue, he said.

Further, it “is not a substrate for [p-glycoprotein] transport; thus, it doesn’t easily get out of the brain,” Dr. Morgan said. He noted that DM-CHOC-PEN can be used with other agents, such as temozolomide and bis-chloroethylnitrosourea, because of the difference in mechanisms of action.

This study was supported by Louisiana state grants, the National Cancer Institute, the National Institute of General Medical Sciences, and the Small Business Innovation Research program. Dr. Morgan reported having no disclosures, but he is chief executive officer of Dekk-Tec Inc., which is developing DM-CHOC-PEN.

[email protected]

SOURCE: Morgan L et al. AACR 2020, Abstract CT181.

A novel penclomedine shows promising safety and efficacy in some adolescent and young adult patients with cancers involving the central nervous system, according to phase 1/2 clinical trial findings.

The trial included 15 patients, aged 15-39 years, with measurable cancer involving the CNS who were treated with the agent 4-Demethyl-4-cholesteryloxycarbonylpenclomedine (DM-CHOC-PEN).

Two of these patients were “in their 59th month of survival and doing well” as of April, when the data were presented at the AACR virtual meeting I.

One of the patients with long-term survival benefit had non–small cell lung cancer, and one had astrocytoma, Lee Roy Morgan, MD, PhD, chief executive officer of Dekk-Tec Inc., New Orleans, reported during a poster presentation.

Patients with glioblastoma, however, “did not do well,” said Dr. Morgan, an adjunct professor at Tulane University in New Orleans. He noted that none of the five glioblastoma patients experienced a long-term response.
 

Safety

Study subjects were treated with the maximum tolerated dose (MTD) of DM-CHOC-PEN as identified in an earlier study. Patients with liver involvement received 75 mg/m², and those without liver involvement received up to 98.7 mg/m². Dosing was by 3-hour intravenous administration once every 21 days as lab tests and subject status allowed.

DM-CHOC-PEN was generally well tolerated. One patient experienced grade 2 vasogenic edema, and another experienced seizures. Both were secondary to tumor swelling, and both resolved with tumor regression.

No grade 3 toxicities occurred at the MTD, and “no renal, hematological, hepatic, or pulmonary toxicities were noted using the MTD in this trial,” Dr. Morgan said.
 

Mechanism

DM-CHOC-PEN is a polychlorinated pyridine with a cholesteryl carbonate attachment that induces lipophilicity, which potentiates the drug’s penetration of the blood-brain barrier and its entry into the brain and brain cancers, Dr. Morgan explained.

He added that DM-CHOC-PEN is a bis-alkylator that binds to DNA’s cytosine/guanine nucleotides. The agent does not require hepatic activation, it crosses the blood-brain barrier intact, and accumulates in CNS tumors but not normal CNS tissue, he said.

Further, it “is not a substrate for [p-glycoprotein] transport; thus, it doesn’t easily get out of the brain,” Dr. Morgan said. He noted that DM-CHOC-PEN can be used with other agents, such as temozolomide and bis-chloroethylnitrosourea, because of the difference in mechanisms of action.

This study was supported by Louisiana state grants, the National Cancer Institute, the National Institute of General Medical Sciences, and the Small Business Innovation Research program. Dr. Morgan reported having no disclosures, but he is chief executive officer of Dekk-Tec Inc., which is developing DM-CHOC-PEN.

[email protected]

SOURCE: Morgan L et al. AACR 2020, Abstract CT181.

A universal chimeric antigen receptor (CAR) T-cell therapy produced responses in adults with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL), according to initial findings from an ongoing study.

The first five patients enrolled in this first-in-human study received conditioning and an infusion of the premanufactured CD7-targeted CAR T-cell therapy, TruUCAR GC027.

All five patients achieved a complete remission (CR) or CR with incomplete count recovery (CRi), although one patient had a morphological relapse at 1 month.

Xinxin Wang, PhD, reported these results at the AACR Virtual Meeting I. Dr. Wang is employed by Gracell Biotechnologies in Shanghai, China, which is the company developing TruUCAR GC027.

The CAR T-cell therapy is manufactured using lentivirus and leukopaks from HLA-mismatched healthy donors, according to Dr. Wang. TruUCAR GC027 contains second-generation CAR T cells with genomic disruption of TCR-alpha and CD7 to help prevent graft-versus-host disease and fratricide.

TruUCAR GC027 was previously shown to expand and have antileukemic activity in a murine model, Dr. Wang noted.
 

Patients and treatment

The five patients in the phase 1 study had a median age of 24 years (range, 19 to 38 years). They had heavily pretreated T-ALL, with a median of 5 prior lines of therapy (range, 1-9). Baseline bone marrow tumor burden ranged from 4% to 80.2% (median, 38.2%).

None of the patients received prior allogeneic hematopoietic stem cell transplant.

All patients received a preconditioning chemotherapy regimen. One patient received TruUCAR GC027 at dose level 1 (6 x 10⁶ cells/kg), three patients received dose level 2 (1 x 10⁷ cells/kg), and one patient received dose level 3 (1.5 x 10⁷ cells/kg) – each as a single infusion.
 

Expansion, response, and safety

“GC027 expansion, analyzed by flow [cytometry] was observed in most of the patients treated,” Dr. Wang said. “We started to see GC027 in the peripheral blood as early as day 5, with peaks around day 7-14.”

All five patients had a CR or CRi at the first postinfusion evaluation, which occurred at day 14 in four of the five patients. Four patients also achieved minimum residual disease (MRD) negativity by 1 month of follow-up and remained in MRD-negative CR at the February 6, 2020, data cutoff.

One patient achieved MRD-positive CR at day 14 but experienced morphological relapse at 1 month.

In the four patients with MRD-negative CR at 1 month, cellular expansion was observed as early as day 5 and continued for 2 weeks, but the patient who relapsed at day 29 showed no cellular expansion on flow cytometry, Dr. Wang said.

However, by a more sensitive quantitative polymerase chain reaction analysis, cellular expansion was observed in all five patients starting as early as day 1 after infusion, although the patient who relapsed had the shortest duration of expansion.

All patients developed cytokine release syndrome (CRS). Four patients experienced grade 3 CRS, and one experienced grade 4 CRS.

“The CRS was manageable and reversible,” Dr. Wang said, adding that none of the patients experienced neurotoxicity or graft-versus-host disease.

Prolonged cytopenia occurred in four patients, including one grade 1 case, two grade 3 cases, and one grade 4 case. Grade 3 pulmonary infections occurred in three patients, and grade 3 neutropenia occurred in all five patients.
 

‘Very impressive’ early results

Dr. Wang said the responses observed in this trial are notable because T-ALL constitutes 20%-25% of all adult ALL and 12%-15% of all pediatric ALL. T-ALL is highly aggressive, with event-free and overall survival of less than 25% in the relapsed setting. Dr. Wang noted that, despite the high unmet medical need and lack of treatment options for T-ALL, the development of novel immunotherapies has lagged.

One challenge is that T-ALL and normal T cells share common surface antigens, so targeted therapies for T-ALL will also target normal T cells. Another challenge is the potential contamination by malignant cells in autologous T-cell products, Dr. Wang said, noting that this can be avoided with universal CAR T cells.

Further, CD7 is a good target for T-ALL because it is expressed in more than 95% of T-ALL patients, she added.

“[TruUCAR GC027] demonstrated a very promising early response rate ... and showed a manageable toxicity profile at all three dose levels,” Dr. Wang said in closing, noting that further evaluation is warranted.

Indeed, the results of this next-generation CAR T-cell trial are “very impressive,” said invited discussant Yvonne Y. Chen, PhD, of the University of California, Los Angeles.

There have been concerns that “off-the-shelf” CAR T-cell products like TruUCAR GC027 might be limited by factors such as a reduced level of CAR T-cell persistence and therefore reduced efficacy leading to a need for repeat dosing, Dr. Chen noted. However, Dr. Wang and her colleagues showed a 100% CR/CRi rate with a single dose of CAR T cells and without graft-versus-host disease or neurotoxicity, Dr. Chen emphasized.

“I think it’s also important to note, however, that there’s quite a high incidence rate of grade 3 or higher toxicities, including CRS,” Dr. Chen said. “I suspect this may have something to do with the fairly high dosing levels used in this trial.”

The “big question,” however, is durability of the response, Dr. Chen said. “And this is something that the field will really watch as this trial progresses beyond the 7-month monitoring period ... reported today.”

Dr. Wang is an employee of Gracell Biotechnologies. Dr. Chen is cofounder of Kalthera Therapeutics and a scientific adviser for Gritstone Oncology and Notch Therapeutics.

[email protected]

SOURCE: Wang X et al. AACR 2020, Abstract CT052.

A universal chimeric antigen receptor (CAR) T-cell therapy produced responses in adults with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL), according to initial findings from an ongoing study.

The first five patients enrolled in this first-in-human study received conditioning and an infusion of the premanufactured CD7-targeted CAR T-cell therapy, TruUCAR GC027.

All five patients achieved a complete remission (CR) or CR with incomplete count recovery (CRi), although one patient had a morphological relapse at 1 month.

Xinxin Wang, PhD, reported these results at the AACR Virtual Meeting I. Dr. Wang is employed by Gracell Biotechnologies in Shanghai, China, which is the company developing TruUCAR GC027.

The CAR T-cell therapy is manufactured using lentivirus and leukopaks from HLA-mismatched healthy donors, according to Dr. Wang. TruUCAR GC027 contains second-generation CAR T cells with genomic disruption of TCR-alpha and CD7 to help prevent graft-versus-host disease and fratricide.

TruUCAR GC027 was previously shown to expand and have antileukemic activity in a murine model, Dr. Wang noted.
 

Patients and treatment

The five patients in the phase 1 study had a median age of 24 years (range, 19 to 38 years). They had heavily pretreated T-ALL, with a median of 5 prior lines of therapy (range, 1-9). Baseline bone marrow tumor burden ranged from 4% to 80.2% (median, 38.2%).

None of the patients received prior allogeneic hematopoietic stem cell transplant.

All patients received a preconditioning chemotherapy regimen. One patient received TruUCAR GC027 at dose level 1 (6 x 10⁶ cells/kg), three patients received dose level 2 (1 x 10⁷ cells/kg), and one patient received dose level 3 (1.5 x 10⁷ cells/kg) – each as a single infusion.
 

Expansion, response, and safety

“GC027 expansion, analyzed by flow [cytometry] was observed in most of the patients treated,” Dr. Wang said. “We started to see GC027 in the peripheral blood as early as day 5, with peaks around day 7-14.”

All five patients had a CR or CRi at the first postinfusion evaluation, which occurred at day 14 in four of the five patients. Four patients also achieved minimum residual disease (MRD) negativity by 1 month of follow-up and remained in MRD-negative CR at the February 6, 2020, data cutoff.

One patient achieved MRD-positive CR at day 14 but experienced morphological relapse at 1 month.

In the four patients with MRD-negative CR at 1 month, cellular expansion was observed as early as day 5 and continued for 2 weeks, but the patient who relapsed at day 29 showed no cellular expansion on flow cytometry, Dr. Wang said.

However, by a more sensitive quantitative polymerase chain reaction analysis, cellular expansion was observed in all five patients starting as early as day 1 after infusion, although the patient who relapsed had the shortest duration of expansion.

All patients developed cytokine release syndrome (CRS). Four patients experienced grade 3 CRS, and one experienced grade 4 CRS.

“The CRS was manageable and reversible,” Dr. Wang said, adding that none of the patients experienced neurotoxicity or graft-versus-host disease.

Prolonged cytopenia occurred in four patients, including one grade 1 case, two grade 3 cases, and one grade 4 case. Grade 3 pulmonary infections occurred in three patients, and grade 3 neutropenia occurred in all five patients.
 

‘Very impressive’ early results

Dr. Wang said the responses observed in this trial are notable because T-ALL constitutes 20%-25% of all adult ALL and 12%-15% of all pediatric ALL. T-ALL is highly aggressive, with event-free and overall survival of less than 25% in the relapsed setting. Dr. Wang noted that, despite the high unmet medical need and lack of treatment options for T-ALL, the development of novel immunotherapies has lagged.

One challenge is that T-ALL and normal T cells share common surface antigens, so targeted therapies for T-ALL will also target normal T cells. Another challenge is the potential contamination by malignant cells in autologous T-cell products, Dr. Wang said, noting that this can be avoided with universal CAR T cells.

Further, CD7 is a good target for T-ALL because it is expressed in more than 95% of T-ALL patients, she added.

“[TruUCAR GC027] demonstrated a very promising early response rate ... and showed a manageable toxicity profile at all three dose levels,” Dr. Wang said in closing, noting that further evaluation is warranted.

Indeed, the results of this next-generation CAR T-cell trial are “very impressive,” said invited discussant Yvonne Y. Chen, PhD, of the University of California, Los Angeles.

There have been concerns that “off-the-shelf” CAR T-cell products like TruUCAR GC027 might be limited by factors such as a reduced level of CAR T-cell persistence and therefore reduced efficacy leading to a need for repeat dosing, Dr. Chen noted. However, Dr. Wang and her colleagues showed a 100% CR/CRi rate with a single dose of CAR T cells and without graft-versus-host disease or neurotoxicity, Dr. Chen emphasized.

“I think it’s also important to note, however, that there’s quite a high incidence rate of grade 3 or higher toxicities, including CRS,” Dr. Chen said. “I suspect this may have something to do with the fairly high dosing levels used in this trial.”

The “big question,” however, is durability of the response, Dr. Chen said. “And this is something that the field will really watch as this trial progresses beyond the 7-month monitoring period ... reported today.”

Dr. Wang is an employee of Gracell Biotechnologies. Dr. Chen is cofounder of Kalthera Therapeutics and a scientific adviser for Gritstone Oncology and Notch Therapeutics.

[email protected]

SOURCE: Wang X et al. AACR 2020, Abstract CT052.

A universal chimeric antigen receptor (CAR) T-cell therapy produced responses in adults with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL), according to initial findings from an ongoing study.

The first five patients enrolled in this first-in-human study received conditioning and an infusion of the premanufactured CD7-targeted CAR T-cell therapy, TruUCAR GC027.

All five patients achieved a complete remission (CR) or CR with incomplete count recovery (CRi), although one patient had a morphological relapse at 1 month.

Xinxin Wang, PhD, reported these results at the AACR Virtual Meeting I. Dr. Wang is employed by Gracell Biotechnologies in Shanghai, China, which is the company developing TruUCAR GC027.

The CAR T-cell therapy is manufactured using lentivirus and leukopaks from HLA-mismatched healthy donors, according to Dr. Wang. TruUCAR GC027 contains second-generation CAR T cells with genomic disruption of TCR-alpha and CD7 to help prevent graft-versus-host disease and fratricide.

TruUCAR GC027 was previously shown to expand and have antileukemic activity in a murine model, Dr. Wang noted.
 

Patients and treatment

The five patients in the phase 1 study had a median age of 24 years (range, 19 to 38 years). They had heavily pretreated T-ALL, with a median of 5 prior lines of therapy (range, 1-9). Baseline bone marrow tumor burden ranged from 4% to 80.2% (median, 38.2%).

None of the patients received prior allogeneic hematopoietic stem cell transplant.

All patients received a preconditioning chemotherapy regimen. One patient received TruUCAR GC027 at dose level 1 (6 x 10⁶ cells/kg), three patients received dose level 2 (1 x 10⁷ cells/kg), and one patient received dose level 3 (1.5 x 10⁷ cells/kg) – each as a single infusion.
 

Expansion, response, and safety

“GC027 expansion, analyzed by flow [cytometry] was observed in most of the patients treated,” Dr. Wang said. “We started to see GC027 in the peripheral blood as early as day 5, with peaks around day 7-14.”

All five patients had a CR or CRi at the first postinfusion evaluation, which occurred at day 14 in four of the five patients. Four patients also achieved minimum residual disease (MRD) negativity by 1 month of follow-up and remained in MRD-negative CR at the February 6, 2020, data cutoff.

One patient achieved MRD-positive CR at day 14 but experienced morphological relapse at 1 month.

In the four patients with MRD-negative CR at 1 month, cellular expansion was observed as early as day 5 and continued for 2 weeks, but the patient who relapsed at day 29 showed no cellular expansion on flow cytometry, Dr. Wang said.

However, by a more sensitive quantitative polymerase chain reaction analysis, cellular expansion was observed in all five patients starting as early as day 1 after infusion, although the patient who relapsed had the shortest duration of expansion.

All patients developed cytokine release syndrome (CRS). Four patients experienced grade 3 CRS, and one experienced grade 4 CRS.

“The CRS was manageable and reversible,” Dr. Wang said, adding that none of the patients experienced neurotoxicity or graft-versus-host disease.

Prolonged cytopenia occurred in four patients, including one grade 1 case, two grade 3 cases, and one grade 4 case. Grade 3 pulmonary infections occurred in three patients, and grade 3 neutropenia occurred in all five patients.
 

‘Very impressive’ early results

Dr. Wang said the responses observed in this trial are notable because T-ALL constitutes 20%-25% of all adult ALL and 12%-15% of all pediatric ALL. T-ALL is highly aggressive, with event-free and overall survival of less than 25% in the relapsed setting. Dr. Wang noted that, despite the high unmet medical need and lack of treatment options for T-ALL, the development of novel immunotherapies has lagged.

One challenge is that T-ALL and normal T cells share common surface antigens, so targeted therapies for T-ALL will also target normal T cells. Another challenge is the potential contamination by malignant cells in autologous T-cell products, Dr. Wang said, noting that this can be avoided with universal CAR T cells.

Further, CD7 is a good target for T-ALL because it is expressed in more than 95% of T-ALL patients, she added.

“[TruUCAR GC027] demonstrated a very promising early response rate ... and showed a manageable toxicity profile at all three dose levels,” Dr. Wang said in closing, noting that further evaluation is warranted.

Indeed, the results of this next-generation CAR T-cell trial are “very impressive,” said invited discussant Yvonne Y. Chen, PhD, of the University of California, Los Angeles.

There have been concerns that “off-the-shelf” CAR T-cell products like TruUCAR GC027 might be limited by factors such as a reduced level of CAR T-cell persistence and therefore reduced efficacy leading to a need for repeat dosing, Dr. Chen noted. However, Dr. Wang and her colleagues showed a 100% CR/CRi rate with a single dose of CAR T cells and without graft-versus-host disease or neurotoxicity, Dr. Chen emphasized.

“I think it’s also important to note, however, that there’s quite a high incidence rate of grade 3 or higher toxicities, including CRS,” Dr. Chen said. “I suspect this may have something to do with the fairly high dosing levels used in this trial.”

The “big question,” however, is durability of the response, Dr. Chen said. “And this is something that the field will really watch as this trial progresses beyond the 7-month monitoring period ... reported today.”

Dr. Wang is an employee of Gracell Biotechnologies. Dr. Chen is cofounder of Kalthera Therapeutics and a scientific adviser for Gritstone Oncology and Notch Therapeutics.

[email protected]

SOURCE: Wang X et al. AACR 2020, Abstract CT052.

Minimal residual disease (MRD) surveillance after surgery can detect relapse in advance of imaging in patients with early-stage non–small cell lung cancer (NSCLC), according to findings from the TRACERx study.

The findings pave the way for clinical trials of MRD-driven treatment escalation, Chris Abbosh, MD, of University College London, reported during a presentation at the AACR virtual meeting I. Data in the presentation were updated from the abstract.

Dr. Abbosh and colleagues used phylogenetic circulating tumor DNA (ctDNA) profiling to assess MRD and predict relapse in patients from the TRACERx study who underwent surgery for stage I-III NSCLC.

“The approach we take is technically termed a ‘tumor-informed, personalized cell-free DNA-enrichment approach,’” Dr. Abbosh explained. “We take out the primary tumor from the patient, we multiregion sample that tumor, and submit each region for deep whole-exome sequencing.”

The researchers prioritize variants for MRD tracking based on clonality/subclonality, high copy number status, and low background sequencing noise. The researchers then construct an anchored-multiplex PCR panel against the positions of interest, which is applied to cell-free DNA in the pre- and postoperative setting.

“We’ve developed an MRD caller to go alongside this chemistry,” Dr. Abbosh said. “The main premise behind the MRD caller is that it can calculate intralibrary error rates to inform the MRD pool.”
 

Sensitivity and specificity

To validate their approach, Dr. Abbosh and colleagues tested the assay with low DNA input (5 ng, 10 ng) and high DNA input (30 ng, 60 ng). They found the assay to be more sensitive with higher DNA input, and variant fractions were detected down to 0.003%.

The researchers also assessed how sensitivity and specificity scale with an increasing number of variants – 50, 100, or 200 variants. When tracking 200 variants, the assay was powered to detect lower ctDNA fractions than when tracking 50 variants. On the other hand, specificity was higher with 50 variants (99.8%) than with 200 variants (99.4%).

Next, Dr. Abbosh and colleagues analyzed postoperative cell-free DNA collected at 271 time points from 37 NSCLC patients who did not relapse. This included 11 patients who developed proven second primary malignancies.

Of the 271 time points when MRD negativity was expected, MRD was not detected at 269 time points, which translates to 99.3% specificity for the assay.
 

Shedding, relapse, and disease-free survival

Dr. Abbosh and colleagues also found that non-adenocarcinoma histology is associated with preoperative ctDNA shedding in NSCLC. The researchers analyzed 88 early-stage preoperative samples from NSCLC patients. ctDNA was detected preoperatively in 49% of lung adenocarcinomas and 100% of lung squamous cell carcinomas.

“This finding is important when it comes to interpreting our non–small cell lung cancer relapse data from 53 TRACERx patients,” Dr. Abbosh said.

Of the 53 patients who relapsed, 42 had ctDNA detected prior to surgery and were thus considered shedders, while 11 were nonshedders. ctDNA was detectable at or before relapse in 91% (38/42) of shedders and 64% (7/11) of nonshedders.

The median time from ctDNA detection to clinical relapse was 164 days in shedders and 22 days in nonshedders. The median disease-free survival was 362 days and 640 days, respectively.

“So what these data suggest is that preoperative ctDNA detection status will be a proxy of the potential utility of ctDNA as an MRD biomarker in a clinical setting,” Dr. Abbosh explained.

Standard-of-care imaging findings in the 53 patients who relapsed further demonstrated the utility of ctDNA in this setting, Dr. Abbosh said.

All scans were divided into three categories: those showing unequivocal relapse, those with a new equivocal change (relapse, inflammation, or a nonspecific finding), and those with no evidence of relapse. Each was further categorized by preimaging MRD status.

Relapse occurred in 9 of 10 patients who were MRD positive but had a scan showing no evidence of relapse. Relapse occurred in 15 of 16 patients who were MRD positive and had scans showing new equivocal changes.

Patients with unequivocal evidence of relapse who were MRD negative at or before the scan were more likely to have a second primary cancer than to have NSCLC relapse (52% vs. 48%), which is a reflection of the specificity of the MRD assay to the primary tumor, Dr. Abbosh said.
 

Implications of the findings

The researchers’ findings are important because establishing an MRD-driven approach to treating early-stage NSCLC would facilitate escalation of standard-of-care treatment only for those patients at high risk for relapse, thereby overcoming a key challenge in conventional adjuvant drug-trial design, Dr. Abbosh said.

“If we take a patient population with high-risk early-stage disease who have undergone potentially curative resection of their cancer and we offer these patients adjuvant chemotherapy or adjuvant chemoradiation therapy, then we can improve 5-year survival outcomes in this population,” Dr. Abbosh said. “This is striking because, if we give the same treatment in the metastatic setting, we only see a progression-free survival benefit of a short number of months.”

This suggests a potential “vulnerability of low-burden residual cancer to systemic treatment following surgery,” he added. “So if we want to improve outcomes further in non–small cell lung cancer, we really need to focus on innovation in the early-stage space.”

Dr. Abbosh said he and colleagues demonstrated that “personalized cell-free DNA enrichment can detect low-frequency variant DNA in an accurate manner.

“We’ve shown that preoperative ctDNA shedding is associated with utility of ctDNA as an MRD biomarker and that MRD surveillance can lead to detection of relapse in advance of standard-of-care-imaging,” he said. “We feel that the field is now ready for MRD-driven adjuvant trials.”
 

Questions to be answered

Invited discussant Corey J. Langer, MD, of Penn Medicine in Philadelphia, outlined “fundamental questions” raised by the findings.

“We need more information on the staging and demographics of those who were MRD positive versus MRD negative,” he said.

Dr. Langer also asked about the findings for shedders versus nonshedders.

“Does this mean nonshedders fare better? This needs to addressed formally,” he said.

Another question is whether the assay “simply enables us to detect relapse sooner and increase anxiety,” or if the trajectory and outcomes in those who prove MRD positive ahead of radiographic manifestations can actually be altered.

A study comparing standard observation with early immunotherapy or chemoimmunotherapy in patients with MRD-positive radiographically occult relapse or progression – using progression-free and overall survival, along with time without symptoms of disease or relapse – would be useful, Dr. Langer said.

“A hazard ratio of 0.8 or less would be meaningful,” he added. “In this regard, there are trials looking at enhanced adjuvant treatment both in colorectal and breast cancer, and trials planned in advanced non–small cell [lung cancer].”

Dr. Langer also said it would be interesting to know if the assay can be used as an adjunct to diagnosis in frailer patients with inaccessible tumors or equivocal biopsy results or to avoid invasive procedures in patients who are stereotactic radiation candidates.

“The jury is still out on this,” he said.

TRACERx is funded by University College London in collaboration with Cancer Research UK. Dr. Abbosh disclosed relationships with AstraZeneca, Novartis, Roche Diagnostics, Bristol Myers Squibb, Achilles Therapeutics, and Archer Diagnostics. Dr. Langer reported grant/research support and/or scientific advisory work for multiple companies.

[email protected]

SOURCE: Abbosh C et al. AACR 2020, Abstract CT023.

Minimal residual disease (MRD) surveillance after surgery can detect relapse in advance of imaging in patients with early-stage non–small cell lung cancer (NSCLC), according to findings from the TRACERx study.

The findings pave the way for clinical trials of MRD-driven treatment escalation, Chris Abbosh, MD, of University College London, reported during a presentation at the AACR virtual meeting I. Data in the presentation were updated from the abstract.

Dr. Abbosh and colleagues used phylogenetic circulating tumor DNA (ctDNA) profiling to assess MRD and predict relapse in patients from the TRACERx study who underwent surgery for stage I-III NSCLC.

“The approach we take is technically termed a ‘tumor-informed, personalized cell-free DNA-enrichment approach,’” Dr. Abbosh explained. “We take out the primary tumor from the patient, we multiregion sample that tumor, and submit each region for deep whole-exome sequencing.”

The researchers prioritize variants for MRD tracking based on clonality/subclonality, high copy number status, and low background sequencing noise. The researchers then construct an anchored-multiplex PCR panel against the positions of interest, which is applied to cell-free DNA in the pre- and postoperative setting.

“We’ve developed an MRD caller to go alongside this chemistry,” Dr. Abbosh said. “The main premise behind the MRD caller is that it can calculate intralibrary error rates to inform the MRD pool.”
 

Sensitivity and specificity

To validate their approach, Dr. Abbosh and colleagues tested the assay with low DNA input (5 ng, 10 ng) and high DNA input (30 ng, 60 ng). They found the assay to be more sensitive with higher DNA input, and variant fractions were detected down to 0.003%.

The researchers also assessed how sensitivity and specificity scale with an increasing number of variants – 50, 100, or 200 variants. When tracking 200 variants, the assay was powered to detect lower ctDNA fractions than when tracking 50 variants. On the other hand, specificity was higher with 50 variants (99.8%) than with 200 variants (99.4%).

Next, Dr. Abbosh and colleagues analyzed postoperative cell-free DNA collected at 271 time points from 37 NSCLC patients who did not relapse. This included 11 patients who developed proven second primary malignancies.

Of the 271 time points when MRD negativity was expected, MRD was not detected at 269 time points, which translates to 99.3% specificity for the assay.
 

Shedding, relapse, and disease-free survival

Dr. Abbosh and colleagues also found that non-adenocarcinoma histology is associated with preoperative ctDNA shedding in NSCLC. The researchers analyzed 88 early-stage preoperative samples from NSCLC patients. ctDNA was detected preoperatively in 49% of lung adenocarcinomas and 100% of lung squamous cell carcinomas.

“This finding is important when it comes to interpreting our non–small cell lung cancer relapse data from 53 TRACERx patients,” Dr. Abbosh said.

Of the 53 patients who relapsed, 42 had ctDNA detected prior to surgery and were thus considered shedders, while 11 were nonshedders. ctDNA was detectable at or before relapse in 91% (38/42) of shedders and 64% (7/11) of nonshedders.

The median time from ctDNA detection to clinical relapse was 164 days in shedders and 22 days in nonshedders. The median disease-free survival was 362 days and 640 days, respectively.

“So what these data suggest is that preoperative ctDNA detection status will be a proxy of the potential utility of ctDNA as an MRD biomarker in a clinical setting,” Dr. Abbosh explained.

Standard-of-care imaging findings in the 53 patients who relapsed further demonstrated the utility of ctDNA in this setting, Dr. Abbosh said.

All scans were divided into three categories: those showing unequivocal relapse, those with a new equivocal change (relapse, inflammation, or a nonspecific finding), and those with no evidence of relapse. Each was further categorized by preimaging MRD status.

Relapse occurred in 9 of 10 patients who were MRD positive but had a scan showing no evidence of relapse. Relapse occurred in 15 of 16 patients who were MRD positive and had scans showing new equivocal changes.

Patients with unequivocal evidence of relapse who were MRD negative at or before the scan were more likely to have a second primary cancer than to have NSCLC relapse (52% vs. 48%), which is a reflection of the specificity of the MRD assay to the primary tumor, Dr. Abbosh said.
 

Implications of the findings

The researchers’ findings are important because establishing an MRD-driven approach to treating early-stage NSCLC would facilitate escalation of standard-of-care treatment only for those patients at high risk for relapse, thereby overcoming a key challenge in conventional adjuvant drug-trial design, Dr. Abbosh said.

“If we take a patient population with high-risk early-stage disease who have undergone potentially curative resection of their cancer and we offer these patients adjuvant chemotherapy or adjuvant chemoradiation therapy, then we can improve 5-year survival outcomes in this population,” Dr. Abbosh said. “This is striking because, if we give the same treatment in the metastatic setting, we only see a progression-free survival benefit of a short number of months.”

This suggests a potential “vulnerability of low-burden residual cancer to systemic treatment following surgery,” he added. “So if we want to improve outcomes further in non–small cell lung cancer, we really need to focus on innovation in the early-stage space.”

Dr. Abbosh said he and colleagues demonstrated that “personalized cell-free DNA enrichment can detect low-frequency variant DNA in an accurate manner.

“We’ve shown that preoperative ctDNA shedding is associated with utility of ctDNA as an MRD biomarker and that MRD surveillance can lead to detection of relapse in advance of standard-of-care-imaging,” he said. “We feel that the field is now ready for MRD-driven adjuvant trials.”
 

Questions to be answered

Invited discussant Corey J. Langer, MD, of Penn Medicine in Philadelphia, outlined “fundamental questions” raised by the findings.

“We need more information on the staging and demographics of those who were MRD positive versus MRD negative,” he said.

Dr. Langer also asked about the findings for shedders versus nonshedders.

“Does this mean nonshedders fare better? This needs to addressed formally,” he said.

Another question is whether the assay “simply enables us to detect relapse sooner and increase anxiety,” or if the trajectory and outcomes in those who prove MRD positive ahead of radiographic manifestations can actually be altered.

A study comparing standard observation with early immunotherapy or chemoimmunotherapy in patients with MRD-positive radiographically occult relapse or progression – using progression-free and overall survival, along with time without symptoms of disease or relapse – would be useful, Dr. Langer said.

“A hazard ratio of 0.8 or less would be meaningful,” he added. “In this regard, there are trials looking at enhanced adjuvant treatment both in colorectal and breast cancer, and trials planned in advanced non–small cell [lung cancer].”

Dr. Langer also said it would be interesting to know if the assay can be used as an adjunct to diagnosis in frailer patients with inaccessible tumors or equivocal biopsy results or to avoid invasive procedures in patients who are stereotactic radiation candidates.

“The jury is still out on this,” he said.

TRACERx is funded by University College London in collaboration with Cancer Research UK. Dr. Abbosh disclosed relationships with AstraZeneca, Novartis, Roche Diagnostics, Bristol Myers Squibb, Achilles Therapeutics, and Archer Diagnostics. Dr. Langer reported grant/research support and/or scientific advisory work for multiple companies.

[email protected]

SOURCE: Abbosh C et al. AACR 2020, Abstract CT023.

Minimal residual disease (MRD) surveillance after surgery can detect relapse in advance of imaging in patients with early-stage non–small cell lung cancer (NSCLC), according to findings from the TRACERx study.

The findings pave the way for clinical trials of MRD-driven treatment escalation, Chris Abbosh, MD, of University College London, reported during a presentation at the AACR virtual meeting I. Data in the presentation were updated from the abstract.

Dr. Abbosh and colleagues used phylogenetic circulating tumor DNA (ctDNA) profiling to assess MRD and predict relapse in patients from the TRACERx study who underwent surgery for stage I-III NSCLC.

“The approach we take is technically termed a ‘tumor-informed, personalized cell-free DNA-enrichment approach,’” Dr. Abbosh explained. “We take out the primary tumor from the patient, we multiregion sample that tumor, and submit each region for deep whole-exome sequencing.”

The researchers prioritize variants for MRD tracking based on clonality/subclonality, high copy number status, and low background sequencing noise. The researchers then construct an anchored-multiplex PCR panel against the positions of interest, which is applied to cell-free DNA in the pre- and postoperative setting.

“We’ve developed an MRD caller to go alongside this chemistry,” Dr. Abbosh said. “The main premise behind the MRD caller is that it can calculate intralibrary error rates to inform the MRD pool.”
 

Sensitivity and specificity

To validate their approach, Dr. Abbosh and colleagues tested the assay with low DNA input (5 ng, 10 ng) and high DNA input (30 ng, 60 ng). They found the assay to be more sensitive with higher DNA input, and variant fractions were detected down to 0.003%.

The researchers also assessed how sensitivity and specificity scale with an increasing number of variants – 50, 100, or 200 variants. When tracking 200 variants, the assay was powered to detect lower ctDNA fractions than when tracking 50 variants. On the other hand, specificity was higher with 50 variants (99.8%) than with 200 variants (99.4%).

Next, Dr. Abbosh and colleagues analyzed postoperative cell-free DNA collected at 271 time points from 37 NSCLC patients who did not relapse. This included 11 patients who developed proven second primary malignancies.

Of the 271 time points when MRD negativity was expected, MRD was not detected at 269 time points, which translates to 99.3% specificity for the assay.
 

Shedding, relapse, and disease-free survival

Dr. Abbosh and colleagues also found that non-adenocarcinoma histology is associated with preoperative ctDNA shedding in NSCLC. The researchers analyzed 88 early-stage preoperative samples from NSCLC patients. ctDNA was detected preoperatively in 49% of lung adenocarcinomas and 100% of lung squamous cell carcinomas.

“This finding is important when it comes to interpreting our non–small cell lung cancer relapse data from 53 TRACERx patients,” Dr. Abbosh said.

Of the 53 patients who relapsed, 42 had ctDNA detected prior to surgery and were thus considered shedders, while 11 were nonshedders. ctDNA was detectable at or before relapse in 91% (38/42) of shedders and 64% (7/11) of nonshedders.

The median time from ctDNA detection to clinical relapse was 164 days in shedders and 22 days in nonshedders. The median disease-free survival was 362 days and 640 days, respectively.

“So what these data suggest is that preoperative ctDNA detection status will be a proxy of the potential utility of ctDNA as an MRD biomarker in a clinical setting,” Dr. Abbosh explained.

Standard-of-care imaging findings in the 53 patients who relapsed further demonstrated the utility of ctDNA in this setting, Dr. Abbosh said.

All scans were divided into three categories: those showing unequivocal relapse, those with a new equivocal change (relapse, inflammation, or a nonspecific finding), and those with no evidence of relapse. Each was further categorized by preimaging MRD status.

Relapse occurred in 9 of 10 patients who were MRD positive but had a scan showing no evidence of relapse. Relapse occurred in 15 of 16 patients who were MRD positive and had scans showing new equivocal changes.

Patients with unequivocal evidence of relapse who were MRD negative at or before the scan were more likely to have a second primary cancer than to have NSCLC relapse (52% vs. 48%), which is a reflection of the specificity of the MRD assay to the primary tumor, Dr. Abbosh said.
 

Implications of the findings

The researchers’ findings are important because establishing an MRD-driven approach to treating early-stage NSCLC would facilitate escalation of standard-of-care treatment only for those patients at high risk for relapse, thereby overcoming a key challenge in conventional adjuvant drug-trial design, Dr. Abbosh said.

“If we take a patient population with high-risk early-stage disease who have undergone potentially curative resection of their cancer and we offer these patients adjuvant chemotherapy or adjuvant chemoradiation therapy, then we can improve 5-year survival outcomes in this population,” Dr. Abbosh said. “This is striking because, if we give the same treatment in the metastatic setting, we only see a progression-free survival benefit of a short number of months.”

This suggests a potential “vulnerability of low-burden residual cancer to systemic treatment following surgery,” he added. “So if we want to improve outcomes further in non–small cell lung cancer, we really need to focus on innovation in the early-stage space.”

Dr. Abbosh said he and colleagues demonstrated that “personalized cell-free DNA enrichment can detect low-frequency variant DNA in an accurate manner.

“We’ve shown that preoperative ctDNA shedding is associated with utility of ctDNA as an MRD biomarker and that MRD surveillance can lead to detection of relapse in advance of standard-of-care-imaging,” he said. “We feel that the field is now ready for MRD-driven adjuvant trials.”
 

Questions to be answered

Invited discussant Corey J. Langer, MD, of Penn Medicine in Philadelphia, outlined “fundamental questions” raised by the findings.

“We need more information on the staging and demographics of those who were MRD positive versus MRD negative,” he said.

Dr. Langer also asked about the findings for shedders versus nonshedders.

“Does this mean nonshedders fare better? This needs to addressed formally,” he said.

Another question is whether the assay “simply enables us to detect relapse sooner and increase anxiety,” or if the trajectory and outcomes in those who prove MRD positive ahead of radiographic manifestations can actually be altered.

A study comparing standard observation with early immunotherapy or chemoimmunotherapy in patients with MRD-positive radiographically occult relapse or progression – using progression-free and overall survival, along with time without symptoms of disease or relapse – would be useful, Dr. Langer said.

“A hazard ratio of 0.8 or less would be meaningful,” he added. “In this regard, there are trials looking at enhanced adjuvant treatment both in colorectal and breast cancer, and trials planned in advanced non–small cell [lung cancer].”

Dr. Langer also said it would be interesting to know if the assay can be used as an adjunct to diagnosis in frailer patients with inaccessible tumors or equivocal biopsy results or to avoid invasive procedures in patients who are stereotactic radiation candidates.

“The jury is still out on this,” he said.

TRACERx is funded by University College London in collaboration with Cancer Research UK. Dr. Abbosh disclosed relationships with AstraZeneca, Novartis, Roche Diagnostics, Bristol Myers Squibb, Achilles Therapeutics, and Archer Diagnostics. Dr. Langer reported grant/research support and/or scientific advisory work for multiple companies.

[email protected]

SOURCE: Abbosh C et al. AACR 2020, Abstract CT023.

The autologous tumor cell vaccine gemogenovatucel-T (Vigil Ovarian) is well tolerated as maintenance therapy in stage III-IV ovarian cancer patients and may improve relapse-free survival, particularly in BRCA wild-type disease, according to findings from the ongoing VITAL study.

In patients with and without BRCA1/2 mutations, the median relapse-free survival was longer with gemogenovatucel-T maintenance than with placebo, but the difference did not reach statistical significance (P = .065).

However, among patients with wild-type BRCA, the median relapse-free survival was significantly longer with gemogenovatucel-T (P = .0007).

Rodney P. Rocconi, MD, of the Mitchell Cancer Institute at University of South Alabama, Mobile, reported these results in an abstract that was slated for presentation at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancers. The meeting was canceled because of the COVID-19 pandemic. Some data have been updated from the abstract.
 

Study rationale

Gemogenovatucel-T (formerly called FANG) is an autologous tumor cell vaccine transfected with a plasmid encoding granulocyte-macrophage colony–stimulating factor and a novel bifunctional short hairpin interfering RNA targeting furin convertase.

“In the era of personalized, targeted medicine, I think this is about as personalized as you can get, this type of vaccine,” Dr. Rocconi said. “Essentially, we harvest patients’ own cancer cells and create a vaccine that is targeted to the antigens on their cells so that it recognizes only that patient’s cancer.”

The vaccine also helps recruit immune cells to the area and has a very limited off-target effect, Dr. Rocconi added.

He noted that gemogenovatucel-T previously demonstrated promising efficacy and limited side effects in a phase 1 study that included patients with advanced ovarian cancer (Mol Ther. 2012 Mar;20[3]:679-86).

“So we thought that, in ovarian cancer, as a maintenance therapy, it made a lot of sense,” Dr. Rocconi said, noting that the overall prognosis for advanced epithelial ovarian cancer remains limited.
 

Treatment and toxicity

Dr. Rocconi and colleagues reported data on 91 patients in the VITAL study. The patients had achieved a complete response after frontline surgery and chemotherapy, and they were randomized to maintenance with gemogenovatucel-T or placebo.

Patients had a median time from surgery to randomization of 208.5 days in the gemogenovatucel-T group and 200 days in the control group. The patients were treated with 1 x 10⁷ cells/mL of gemogenovatucel-T or placebo intradermally once a month for up to 12 doses.

Gemogenovatucel-T was well tolerated. No added overall toxicity was noted in the gemogenovatucel-T group versus the control group, and no grade 4/5 toxicities were observed, Dr. Rocconi said. Grade 2/3 toxic events were observed in 8% of patients in the gemogenovatucel-T group, compared with 18% in the control group. The most common events were nausea and musculoskeletal pain in the gemogenovatucel-T group, and were bone pain and fatigue in the control group.
 

Relapse-free and overall survival

In the entire cohort, the median relapse-free survival was longer with gemogenovatucel-T maintenance – 12.6 months versus 8.4 months with placebo (hazard ratio, 0.69) – but the difference did not reach statistical significance (P = .065).

However, in the 67 patients with wild-type BRCA, the median relapse-free survival was 19.4 months with gemogenovatucel-T and 14.8 months with placebo, a statistically significant difference (HR, 0.459; P = .0007).

The median overall survival was not reached in the BRCA wild-type patients treated with gemogenovatucel-T, and it was 41.4 months from the time of randomization in those who received placebo (HR, 0.417; P = .02).

No benefit was seen with gemogenovatucel-T in patients with known BRCA1/2 mutations, Dr. Rocconi said.
 

‘Encouraging’ results

The overall improvement in the gemogenovatucel-T group was encouraging, particularly in a maintenance-type trial, Dr. Rocconi said. He noted that prior treatments for maintenance have received approval based on shorter survival gains, and the finding of particular benefit in BRCA wild-type disease could have important implications for a population that usually has lesser benefit from treatments, compared with patients who have BRCA mutations.

“So this result is very unique,” Dr. Rocconi said, explaining that about 85% of ovarian cancer patients have BRCA wild-type disease; with this treatment, patients with wild-type BRCA may achieve similar survival rates as those seen in BRCA-mutant disease.

“I think, in general, immunotherapy has been somewhat disappointing in ovarian cancer, so to have a targeted vaccine work in ovarian cancer, just broadly ... is pretty noteworthy,” he said. “We’re really excited, obviously, about the overall success we’ve seen for all patients, but most importantly in those with BRCA wild type. This is a pretty marked significance in recurrence-free intervals and overall survival, and we’re definitely pleased with that.”
 

Next steps

The findings from this trial have been submitted for publication, and efforts are underway to determine next steps through communication with the Food and Drug Administration, Dr. Rocconi said.

Additionally, other studies are underway to assess gemogenovatucel-T in patients who fall in “the middle ground” – that is, patients who have BRCA wild-type disease but have “some homologous recombination deficiency where the tumor itself might be BRCA deficient or have some other type of deficiency,” Dr. Rocconi explained.

“So we’re trying to tease out specifically what is going on across all the different variations of ovarian cancer patients, and also looking for potential biomarkers for predicting response,” he said. “What we would like to see is a companion test where we’re able to predict which patients can really respond and do best with this technology, and, that way, we know how to stratify patients most appropriately.”

The current trial was sponsored by Gradalis. Dr. Rocconi disclosed relationships with Gradalis, Genentech, Clovis, and Johnson & Johnson.

[email protected]

SOURCE: Rocconi RP et al. SGO 2020, Abstract LBA7.

The autologous tumor cell vaccine gemogenovatucel-T (Vigil Ovarian) is well tolerated as maintenance therapy in stage III-IV ovarian cancer patients and may improve relapse-free survival, particularly in BRCA wild-type disease, according to findings from the ongoing VITAL study.

In patients with and without BRCA1/2 mutations, the median relapse-free survival was longer with gemogenovatucel-T maintenance than with placebo, but the difference did not reach statistical significance (P = .065).

However, among patients with wild-type BRCA, the median relapse-free survival was significantly longer with gemogenovatucel-T (P = .0007).

Rodney P. Rocconi, MD, of the Mitchell Cancer Institute at University of South Alabama, Mobile, reported these results in an abstract that was slated for presentation at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancers. The meeting was canceled because of the COVID-19 pandemic. Some data have been updated from the abstract.
 

Study rationale

Gemogenovatucel-T (formerly called FANG) is an autologous tumor cell vaccine transfected with a plasmid encoding granulocyte-macrophage colony–stimulating factor and a novel bifunctional short hairpin interfering RNA targeting furin convertase.

“In the era of personalized, targeted medicine, I think this is about as personalized as you can get, this type of vaccine,” Dr. Rocconi said. “Essentially, we harvest patients’ own cancer cells and create a vaccine that is targeted to the antigens on their cells so that it recognizes only that patient’s cancer.”

The vaccine also helps recruit immune cells to the area and has a very limited off-target effect, Dr. Rocconi added.

He noted that gemogenovatucel-T previously demonstrated promising efficacy and limited side effects in a phase 1 study that included patients with advanced ovarian cancer (Mol Ther. 2012 Mar;20[3]:679-86).

“So we thought that, in ovarian cancer, as a maintenance therapy, it made a lot of sense,” Dr. Rocconi said, noting that the overall prognosis for advanced epithelial ovarian cancer remains limited.
 

Treatment and toxicity

Dr. Rocconi and colleagues reported data on 91 patients in the VITAL study. The patients had achieved a complete response after frontline surgery and chemotherapy, and they were randomized to maintenance with gemogenovatucel-T or placebo.

Patients had a median time from surgery to randomization of 208.5 days in the gemogenovatucel-T group and 200 days in the control group. The patients were treated with 1 x 10⁷ cells/mL of gemogenovatucel-T or placebo intradermally once a month for up to 12 doses.

Gemogenovatucel-T was well tolerated. No added overall toxicity was noted in the gemogenovatucel-T group versus the control group, and no grade 4/5 toxicities were observed, Dr. Rocconi said. Grade 2/3 toxic events were observed in 8% of patients in the gemogenovatucel-T group, compared with 18% in the control group. The most common events were nausea and musculoskeletal pain in the gemogenovatucel-T group, and were bone pain and fatigue in the control group.
 

Relapse-free and overall survival

In the entire cohort, the median relapse-free survival was longer with gemogenovatucel-T maintenance – 12.6 months versus 8.4 months with placebo (hazard ratio, 0.69) – but the difference did not reach statistical significance (P = .065).

However, in the 67 patients with wild-type BRCA, the median relapse-free survival was 19.4 months with gemogenovatucel-T and 14.8 months with placebo, a statistically significant difference (HR, 0.459; P = .0007).

The median overall survival was not reached in the BRCA wild-type patients treated with gemogenovatucel-T, and it was 41.4 months from the time of randomization in those who received placebo (HR, 0.417; P = .02).

No benefit was seen with gemogenovatucel-T in patients with known BRCA1/2 mutations, Dr. Rocconi said.
 

‘Encouraging’ results

The overall improvement in the gemogenovatucel-T group was encouraging, particularly in a maintenance-type trial, Dr. Rocconi said. He noted that prior treatments for maintenance have received approval based on shorter survival gains, and the finding of particular benefit in BRCA wild-type disease could have important implications for a population that usually has lesser benefit from treatments, compared with patients who have BRCA mutations.

“So this result is very unique,” Dr. Rocconi said, explaining that about 85% of ovarian cancer patients have BRCA wild-type disease; with this treatment, patients with wild-type BRCA may achieve similar survival rates as those seen in BRCA-mutant disease.

“I think, in general, immunotherapy has been somewhat disappointing in ovarian cancer, so to have a targeted vaccine work in ovarian cancer, just broadly ... is pretty noteworthy,” he said. “We’re really excited, obviously, about the overall success we’ve seen for all patients, but most importantly in those with BRCA wild type. This is a pretty marked significance in recurrence-free intervals and overall survival, and we’re definitely pleased with that.”
 

Next steps

The findings from this trial have been submitted for publication, and efforts are underway to determine next steps through communication with the Food and Drug Administration, Dr. Rocconi said.

Additionally, other studies are underway to assess gemogenovatucel-T in patients who fall in “the middle ground” – that is, patients who have BRCA wild-type disease but have “some homologous recombination deficiency where the tumor itself might be BRCA deficient or have some other type of deficiency,” Dr. Rocconi explained.

“So we’re trying to tease out specifically what is going on across all the different variations of ovarian cancer patients, and also looking for potential biomarkers for predicting response,” he said. “What we would like to see is a companion test where we’re able to predict which patients can really respond and do best with this technology, and, that way, we know how to stratify patients most appropriately.”

The current trial was sponsored by Gradalis. Dr. Rocconi disclosed relationships with Gradalis, Genentech, Clovis, and Johnson & Johnson.

[email protected]

SOURCE: Rocconi RP et al. SGO 2020, Abstract LBA7.

The autologous tumor cell vaccine gemogenovatucel-T (Vigil Ovarian) is well tolerated as maintenance therapy in stage III-IV ovarian cancer patients and may improve relapse-free survival, particularly in BRCA wild-type disease, according to findings from the ongoing VITAL study.

In patients with and without BRCA1/2 mutations, the median relapse-free survival was longer with gemogenovatucel-T maintenance than with placebo, but the difference did not reach statistical significance (P = .065).

However, among patients with wild-type BRCA, the median relapse-free survival was significantly longer with gemogenovatucel-T (P = .0007).

Rodney P. Rocconi, MD, of the Mitchell Cancer Institute at University of South Alabama, Mobile, reported these results in an abstract that was slated for presentation at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancers. The meeting was canceled because of the COVID-19 pandemic. Some data have been updated from the abstract.
 

Study rationale

Gemogenovatucel-T (formerly called FANG) is an autologous tumor cell vaccine transfected with a plasmid encoding granulocyte-macrophage colony–stimulating factor and a novel bifunctional short hairpin interfering RNA targeting furin convertase.

“In the era of personalized, targeted medicine, I think this is about as personalized as you can get, this type of vaccine,” Dr. Rocconi said. “Essentially, we harvest patients’ own cancer cells and create a vaccine that is targeted to the antigens on their cells so that it recognizes only that patient’s cancer.”

The vaccine also helps recruit immune cells to the area and has a very limited off-target effect, Dr. Rocconi added.

He noted that gemogenovatucel-T previously demonstrated promising efficacy and limited side effects in a phase 1 study that included patients with advanced ovarian cancer (Mol Ther. 2012 Mar;20[3]:679-86).

“So we thought that, in ovarian cancer, as a maintenance therapy, it made a lot of sense,” Dr. Rocconi said, noting that the overall prognosis for advanced epithelial ovarian cancer remains limited.
 

Treatment and toxicity

Dr. Rocconi and colleagues reported data on 91 patients in the VITAL study. The patients had achieved a complete response after frontline surgery and chemotherapy, and they were randomized to maintenance with gemogenovatucel-T or placebo.

Patients had a median time from surgery to randomization of 208.5 days in the gemogenovatucel-T group and 200 days in the control group. The patients were treated with 1 x 10⁷ cells/mL of gemogenovatucel-T or placebo intradermally once a month for up to 12 doses.

Gemogenovatucel-T was well tolerated. No added overall toxicity was noted in the gemogenovatucel-T group versus the control group, and no grade 4/5 toxicities were observed, Dr. Rocconi said. Grade 2/3 toxic events were observed in 8% of patients in the gemogenovatucel-T group, compared with 18% in the control group. The most common events were nausea and musculoskeletal pain in the gemogenovatucel-T group, and were bone pain and fatigue in the control group.
 

Relapse-free and overall survival

In the entire cohort, the median relapse-free survival was longer with gemogenovatucel-T maintenance – 12.6 months versus 8.4 months with placebo (hazard ratio, 0.69) – but the difference did not reach statistical significance (P = .065).

However, in the 67 patients with wild-type BRCA, the median relapse-free survival was 19.4 months with gemogenovatucel-T and 14.8 months with placebo, a statistically significant difference (HR, 0.459; P = .0007).

The median overall survival was not reached in the BRCA wild-type patients treated with gemogenovatucel-T, and it was 41.4 months from the time of randomization in those who received placebo (HR, 0.417; P = .02).

No benefit was seen with gemogenovatucel-T in patients with known BRCA1/2 mutations, Dr. Rocconi said.
 

‘Encouraging’ results

The overall improvement in the gemogenovatucel-T group was encouraging, particularly in a maintenance-type trial, Dr. Rocconi said. He noted that prior treatments for maintenance have received approval based on shorter survival gains, and the finding of particular benefit in BRCA wild-type disease could have important implications for a population that usually has lesser benefit from treatments, compared with patients who have BRCA mutations.

“So this result is very unique,” Dr. Rocconi said, explaining that about 85% of ovarian cancer patients have BRCA wild-type disease; with this treatment, patients with wild-type BRCA may achieve similar survival rates as those seen in BRCA-mutant disease.

“I think, in general, immunotherapy has been somewhat disappointing in ovarian cancer, so to have a targeted vaccine work in ovarian cancer, just broadly ... is pretty noteworthy,” he said. “We’re really excited, obviously, about the overall success we’ve seen for all patients, but most importantly in those with BRCA wild type. This is a pretty marked significance in recurrence-free intervals and overall survival, and we’re definitely pleased with that.”
 

Next steps

The findings from this trial have been submitted for publication, and efforts are underway to determine next steps through communication with the Food and Drug Administration, Dr. Rocconi said.

Additionally, other studies are underway to assess gemogenovatucel-T in patients who fall in “the middle ground” – that is, patients who have BRCA wild-type disease but have “some homologous recombination deficiency where the tumor itself might be BRCA deficient or have some other type of deficiency,” Dr. Rocconi explained.

“So we’re trying to tease out specifically what is going on across all the different variations of ovarian cancer patients, and also looking for potential biomarkers for predicting response,” he said. “What we would like to see is a companion test where we’re able to predict which patients can really respond and do best with this technology, and, that way, we know how to stratify patients most appropriately.”

The current trial was sponsored by Gradalis. Dr. Rocconi disclosed relationships with Gradalis, Genentech, Clovis, and Johnson & Johnson.

[email protected]

SOURCE: Rocconi RP et al. SGO 2020, Abstract LBA7.