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Efficacy of postvenetoclax therapy may depend on prior agent exposure in CLL
ORLANDO – For a patient with chronic lymphocytic leukemia (CLL) who has discontinued venetoclax, choosing the best next therapy may depend on what novel agents the patient was exposed to and why they discontinued them, according to Anthony R. Mato, MD, with the Center for CLL at Memorial Sloan Kettering Cancer Center in New York.
If the patient is Bruton tyrosine kinase (BTK) inhibitor naive, then use of a BTK inhibitor after venetoclax would be supported, Dr. Mato said, by the high overall response rates and durable remissions that he and his coinvestigators documented in a retrospective, multicenter study designed specifically to address the gap in knowledge regarding what to use after venetoclax.
If the patient is BTK inhibitor exposed, then the reason for discontinuation needs to be considered before going with that venetoclax-to-BTK inhibitor sequence, Dr. Mato said during an oral presentation at the annual meeting of the American Society of Hematology.
“In patients with resistance to a BTK inhibitor, the sequence was not supported – it did not appear to be effective,” he said. “However, in the setting of intolerance, an alternate BTK inhibitor could be considered.”
The study did not support a venetoclax-to-PI3K inhibitor sequence in PI3K-naive patients, he added, noting that remissions did not appear to be durable, suggesting a potential overlap in resistance mechanisms between agents.
All told, the most effective therapies for in the postvenetoclax setting included the use of a BTK inhibitor in BTK inhibitor–naive or previously responsive patients, and allogeneic transplant following double novel-agent exposure.
“These data may provide support for venetoclax’s earlier use in the course of CLL, and may guide clinical practice and aid in the design of future clinical trials to address sequencing of novel agents,” Dr. Mato told attendees.
While prospective and real-world data clearly show that venetoclax is active in ibrutinib- or idelalisib-exposed patients, data are conversely “variable and limited” with regard to outcomes for next therapies following venetoclax.
“Current data addressing this key sequencing question, I feel, is a major limitation in supporting the sequence of venetoclax to a BTK inhibitor,” Dr. Mato said.
Accordingly, Dr. Mato and colleagues at 31 centers internationally planned and conducted this study, which included data on 326 patients treated with venetoclax who then discontinued for any reason.
“I wanted to highlight that 50% of the sites for this trial were recruited by a single tweet,” said Dr. Mato, adding that he and his coauthors received no funding to conduct this study and volunteered their time to complete it.
They found that, in BTK inhibitor–naive patients who discontinued venetoclax, subsequent BTK inhibitor treatment was associated with a high overall response rate and durable remissions, with a median progression-free survival (PFS) of 32 months.
In BTK inhibitor–exposed patients, response to postvenetoclax BTK inhibitor treatment depended on the reason for discontinuation, with a favorable result (PFS not reached with a mean follow-up of 7.7 months) in patients who were intolerant of the prior BTK inhibitor. By contrast, median PFS was only about 4 months for patients who were resistant to the prior BTK inhibitor.
PI3K inhibitors did not produce durable remissions after venetoclax, with a median PFS also of just 4 months, Dr. Mato reported.
However, cellular therapies appeared to be effective after venetoclax. Allogeneic hematopoietic stem cell transplantation was particularly effective, with the median PFS not reached, while chimeric antigen receptor T-cell therapy produced a PFS of 9 months.
Dr. Mato emphasized that the results of the retrospective trial were “hypothesis generating” and noted that patients in the study had received a median of 3, and up to 11, prior therapies. “This population are probably not our patients receiving venetoclax in clinical practice. They’re more heavily pretreated.”
Dr. Mato reported disclosures related to Gilead, AstraZeneca, AbbVie, Sunesis, Johnson & Johnson, TG Therapeutics, Loxo Oncology, DTRM Biopharma, Genentech, Janssen, Acerta Pharma, Pharmacyclics, and Celgene.
SOURCE: Mato AR et al. ASH 2019, Abstract 502.
ORLANDO – For a patient with chronic lymphocytic leukemia (CLL) who has discontinued venetoclax, choosing the best next therapy may depend on what novel agents the patient was exposed to and why they discontinued them, according to Anthony R. Mato, MD, with the Center for CLL at Memorial Sloan Kettering Cancer Center in New York.
If the patient is Bruton tyrosine kinase (BTK) inhibitor naive, then use of a BTK inhibitor after venetoclax would be supported, Dr. Mato said, by the high overall response rates and durable remissions that he and his coinvestigators documented in a retrospective, multicenter study designed specifically to address the gap in knowledge regarding what to use after venetoclax.
If the patient is BTK inhibitor exposed, then the reason for discontinuation needs to be considered before going with that venetoclax-to-BTK inhibitor sequence, Dr. Mato said during an oral presentation at the annual meeting of the American Society of Hematology.
“In patients with resistance to a BTK inhibitor, the sequence was not supported – it did not appear to be effective,” he said. “However, in the setting of intolerance, an alternate BTK inhibitor could be considered.”
The study did not support a venetoclax-to-PI3K inhibitor sequence in PI3K-naive patients, he added, noting that remissions did not appear to be durable, suggesting a potential overlap in resistance mechanisms between agents.
All told, the most effective therapies for in the postvenetoclax setting included the use of a BTK inhibitor in BTK inhibitor–naive or previously responsive patients, and allogeneic transplant following double novel-agent exposure.
“These data may provide support for venetoclax’s earlier use in the course of CLL, and may guide clinical practice and aid in the design of future clinical trials to address sequencing of novel agents,” Dr. Mato told attendees.
While prospective and real-world data clearly show that venetoclax is active in ibrutinib- or idelalisib-exposed patients, data are conversely “variable and limited” with regard to outcomes for next therapies following venetoclax.
“Current data addressing this key sequencing question, I feel, is a major limitation in supporting the sequence of venetoclax to a BTK inhibitor,” Dr. Mato said.
Accordingly, Dr. Mato and colleagues at 31 centers internationally planned and conducted this study, which included data on 326 patients treated with venetoclax who then discontinued for any reason.
“I wanted to highlight that 50% of the sites for this trial were recruited by a single tweet,” said Dr. Mato, adding that he and his coauthors received no funding to conduct this study and volunteered their time to complete it.
They found that, in BTK inhibitor–naive patients who discontinued venetoclax, subsequent BTK inhibitor treatment was associated with a high overall response rate and durable remissions, with a median progression-free survival (PFS) of 32 months.
In BTK inhibitor–exposed patients, response to postvenetoclax BTK inhibitor treatment depended on the reason for discontinuation, with a favorable result (PFS not reached with a mean follow-up of 7.7 months) in patients who were intolerant of the prior BTK inhibitor. By contrast, median PFS was only about 4 months for patients who were resistant to the prior BTK inhibitor.
PI3K inhibitors did not produce durable remissions after venetoclax, with a median PFS also of just 4 months, Dr. Mato reported.
However, cellular therapies appeared to be effective after venetoclax. Allogeneic hematopoietic stem cell transplantation was particularly effective, with the median PFS not reached, while chimeric antigen receptor T-cell therapy produced a PFS of 9 months.
Dr. Mato emphasized that the results of the retrospective trial were “hypothesis generating” and noted that patients in the study had received a median of 3, and up to 11, prior therapies. “This population are probably not our patients receiving venetoclax in clinical practice. They’re more heavily pretreated.”
Dr. Mato reported disclosures related to Gilead, AstraZeneca, AbbVie, Sunesis, Johnson & Johnson, TG Therapeutics, Loxo Oncology, DTRM Biopharma, Genentech, Janssen, Acerta Pharma, Pharmacyclics, and Celgene.
SOURCE: Mato AR et al. ASH 2019, Abstract 502.
ORLANDO – For a patient with chronic lymphocytic leukemia (CLL) who has discontinued venetoclax, choosing the best next therapy may depend on what novel agents the patient was exposed to and why they discontinued them, according to Anthony R. Mato, MD, with the Center for CLL at Memorial Sloan Kettering Cancer Center in New York.
If the patient is Bruton tyrosine kinase (BTK) inhibitor naive, then use of a BTK inhibitor after venetoclax would be supported, Dr. Mato said, by the high overall response rates and durable remissions that he and his coinvestigators documented in a retrospective, multicenter study designed specifically to address the gap in knowledge regarding what to use after venetoclax.
If the patient is BTK inhibitor exposed, then the reason for discontinuation needs to be considered before going with that venetoclax-to-BTK inhibitor sequence, Dr. Mato said during an oral presentation at the annual meeting of the American Society of Hematology.
“In patients with resistance to a BTK inhibitor, the sequence was not supported – it did not appear to be effective,” he said. “However, in the setting of intolerance, an alternate BTK inhibitor could be considered.”
The study did not support a venetoclax-to-PI3K inhibitor sequence in PI3K-naive patients, he added, noting that remissions did not appear to be durable, suggesting a potential overlap in resistance mechanisms between agents.
All told, the most effective therapies for in the postvenetoclax setting included the use of a BTK inhibitor in BTK inhibitor–naive or previously responsive patients, and allogeneic transplant following double novel-agent exposure.
“These data may provide support for venetoclax’s earlier use in the course of CLL, and may guide clinical practice and aid in the design of future clinical trials to address sequencing of novel agents,” Dr. Mato told attendees.
While prospective and real-world data clearly show that venetoclax is active in ibrutinib- or idelalisib-exposed patients, data are conversely “variable and limited” with regard to outcomes for next therapies following venetoclax.
“Current data addressing this key sequencing question, I feel, is a major limitation in supporting the sequence of venetoclax to a BTK inhibitor,” Dr. Mato said.
Accordingly, Dr. Mato and colleagues at 31 centers internationally planned and conducted this study, which included data on 326 patients treated with venetoclax who then discontinued for any reason.
“I wanted to highlight that 50% of the sites for this trial were recruited by a single tweet,” said Dr. Mato, adding that he and his coauthors received no funding to conduct this study and volunteered their time to complete it.
They found that, in BTK inhibitor–naive patients who discontinued venetoclax, subsequent BTK inhibitor treatment was associated with a high overall response rate and durable remissions, with a median progression-free survival (PFS) of 32 months.
In BTK inhibitor–exposed patients, response to postvenetoclax BTK inhibitor treatment depended on the reason for discontinuation, with a favorable result (PFS not reached with a mean follow-up of 7.7 months) in patients who were intolerant of the prior BTK inhibitor. By contrast, median PFS was only about 4 months for patients who were resistant to the prior BTK inhibitor.
PI3K inhibitors did not produce durable remissions after venetoclax, with a median PFS also of just 4 months, Dr. Mato reported.
However, cellular therapies appeared to be effective after venetoclax. Allogeneic hematopoietic stem cell transplantation was particularly effective, with the median PFS not reached, while chimeric antigen receptor T-cell therapy produced a PFS of 9 months.
Dr. Mato emphasized that the results of the retrospective trial were “hypothesis generating” and noted that patients in the study had received a median of 3, and up to 11, prior therapies. “This population are probably not our patients receiving venetoclax in clinical practice. They’re more heavily pretreated.”
Dr. Mato reported disclosures related to Gilead, AstraZeneca, AbbVie, Sunesis, Johnson & Johnson, TG Therapeutics, Loxo Oncology, DTRM Biopharma, Genentech, Janssen, Acerta Pharma, Pharmacyclics, and Celgene.
SOURCE: Mato AR et al. ASH 2019, Abstract 502.
REPORTING FROM ASH 2019
Kidney function in African American AML patients not linked to reduced survival compared with whites
ORLANDO – While African Americans with acute myeloid leukemia were more likely to have evidence of abnormal kidney function, the excess of this comorbidity didn’t affect overall survival, compared with whites, according to a study of more than 1,000 patients.
A total of 63% of African Americans with acute myeloid leukemia (AML) presented with a renal function abnormality that could have excluded them from a clinical trial, compared with 56% in the overall cohort; however, analysis of outcomes data suggested that renal function abnormalities were not associated with decreased survival in African Americans versus whites, said Abby Statler, PhD, MPH, of the Cleveland Clinic.
The findings may have implications for the design of clinical trials that might exclude patients on the basis of comorbidities that don’t actually affect survival, according to Dr. Statler.
“If we’re able to liberalize renal function eligibility criteria ... this may reduce racial disparities in clinical trial enrollment, which might be a major step in improving the diversity of cancer patient populations,” Dr. Statler said in a press conference at the annual meeting of the American Society of Hematology.
Overly restrictive criteria could be a significant barrier to clinical trial enrollment among minority patient populations, according to Dr. Statler.
Eligibility criteria are generally biased toward “fit” patient populations, which means they may discriminate against less-fit groups, such as African Americans who, compared with whites, have higher rates of comorbidities and report poorer overall health, according to Dr. Statler.
Laura Michaelis, MD, who chaired the press conference, said these findings suggest current clinical trial designs may be “too restrictive.”
“Once it’s published and validated, [these] data should definitely make us think twice about when you limit a patient’s enrollment in a trial,” Dr. Michaelis said in an interview.
Restrictive eligibility criteria may not only limit access to minority populations, but also may slow clinical trial accrual and completion, and make it harder to generalize clinical trial findings to the overall population, said Dr. Michaelis, associate professor of medicine in the division of hematology and oncology, Medical College of Wisconsin, Milwaukee.
The study by Dr. Statler and colleagues included 1,040 AML patients who received chemotherapy at Cleveland Clinic between 2003 and 2019. About 10% of the patients in the analysis were African American and 90% were white.
Median overall survival was not significantly different by race, at 13.7 months for African Americans and 14.9 months for whites (P = 0.89), according to results published in the study abstract.
Mild creatinine elevation did not appear to affect survival in this study, according to the investigator. Survival was not significantly different between patients with normal creatinine and those with creatinine up to 1.5 times the upper limit of normal. However, higher levels of creatinine were significantly associated with worse survival, Dr. Statler said.
Further analyses showed that these survival findings by creatinine level held up specifically in the African American subgroup as well, Dr. Statler said in the press conference.
Dr. Statler provided no disclosures related to the presentation. Study coauthors described disclosures related to Amgen, SimulStat, Bristol-Myers Squibb, Takeda, Pfizer, Novartis, Celgene Corporation, Abbvie, and Incyte, among others.
SOURCE: Statler A et al. ASH 2019, Abstract 381.
ORLANDO – While African Americans with acute myeloid leukemia were more likely to have evidence of abnormal kidney function, the excess of this comorbidity didn’t affect overall survival, compared with whites, according to a study of more than 1,000 patients.
A total of 63% of African Americans with acute myeloid leukemia (AML) presented with a renal function abnormality that could have excluded them from a clinical trial, compared with 56% in the overall cohort; however, analysis of outcomes data suggested that renal function abnormalities were not associated with decreased survival in African Americans versus whites, said Abby Statler, PhD, MPH, of the Cleveland Clinic.
The findings may have implications for the design of clinical trials that might exclude patients on the basis of comorbidities that don’t actually affect survival, according to Dr. Statler.
“If we’re able to liberalize renal function eligibility criteria ... this may reduce racial disparities in clinical trial enrollment, which might be a major step in improving the diversity of cancer patient populations,” Dr. Statler said in a press conference at the annual meeting of the American Society of Hematology.
Overly restrictive criteria could be a significant barrier to clinical trial enrollment among minority patient populations, according to Dr. Statler.
Eligibility criteria are generally biased toward “fit” patient populations, which means they may discriminate against less-fit groups, such as African Americans who, compared with whites, have higher rates of comorbidities and report poorer overall health, according to Dr. Statler.
Laura Michaelis, MD, who chaired the press conference, said these findings suggest current clinical trial designs may be “too restrictive.”
“Once it’s published and validated, [these] data should definitely make us think twice about when you limit a patient’s enrollment in a trial,” Dr. Michaelis said in an interview.
Restrictive eligibility criteria may not only limit access to minority populations, but also may slow clinical trial accrual and completion, and make it harder to generalize clinical trial findings to the overall population, said Dr. Michaelis, associate professor of medicine in the division of hematology and oncology, Medical College of Wisconsin, Milwaukee.
The study by Dr. Statler and colleagues included 1,040 AML patients who received chemotherapy at Cleveland Clinic between 2003 and 2019. About 10% of the patients in the analysis were African American and 90% were white.
Median overall survival was not significantly different by race, at 13.7 months for African Americans and 14.9 months for whites (P = 0.89), according to results published in the study abstract.
Mild creatinine elevation did not appear to affect survival in this study, according to the investigator. Survival was not significantly different between patients with normal creatinine and those with creatinine up to 1.5 times the upper limit of normal. However, higher levels of creatinine were significantly associated with worse survival, Dr. Statler said.
Further analyses showed that these survival findings by creatinine level held up specifically in the African American subgroup as well, Dr. Statler said in the press conference.
Dr. Statler provided no disclosures related to the presentation. Study coauthors described disclosures related to Amgen, SimulStat, Bristol-Myers Squibb, Takeda, Pfizer, Novartis, Celgene Corporation, Abbvie, and Incyte, among others.
SOURCE: Statler A et al. ASH 2019, Abstract 381.
ORLANDO – While African Americans with acute myeloid leukemia were more likely to have evidence of abnormal kidney function, the excess of this comorbidity didn’t affect overall survival, compared with whites, according to a study of more than 1,000 patients.
A total of 63% of African Americans with acute myeloid leukemia (AML) presented with a renal function abnormality that could have excluded them from a clinical trial, compared with 56% in the overall cohort; however, analysis of outcomes data suggested that renal function abnormalities were not associated with decreased survival in African Americans versus whites, said Abby Statler, PhD, MPH, of the Cleveland Clinic.
The findings may have implications for the design of clinical trials that might exclude patients on the basis of comorbidities that don’t actually affect survival, according to Dr. Statler.
“If we’re able to liberalize renal function eligibility criteria ... this may reduce racial disparities in clinical trial enrollment, which might be a major step in improving the diversity of cancer patient populations,” Dr. Statler said in a press conference at the annual meeting of the American Society of Hematology.
Overly restrictive criteria could be a significant barrier to clinical trial enrollment among minority patient populations, according to Dr. Statler.
Eligibility criteria are generally biased toward “fit” patient populations, which means they may discriminate against less-fit groups, such as African Americans who, compared with whites, have higher rates of comorbidities and report poorer overall health, according to Dr. Statler.
Laura Michaelis, MD, who chaired the press conference, said these findings suggest current clinical trial designs may be “too restrictive.”
“Once it’s published and validated, [these] data should definitely make us think twice about when you limit a patient’s enrollment in a trial,” Dr. Michaelis said in an interview.
Restrictive eligibility criteria may not only limit access to minority populations, but also may slow clinical trial accrual and completion, and make it harder to generalize clinical trial findings to the overall population, said Dr. Michaelis, associate professor of medicine in the division of hematology and oncology, Medical College of Wisconsin, Milwaukee.
The study by Dr. Statler and colleagues included 1,040 AML patients who received chemotherapy at Cleveland Clinic between 2003 and 2019. About 10% of the patients in the analysis were African American and 90% were white.
Median overall survival was not significantly different by race, at 13.7 months for African Americans and 14.9 months for whites (P = 0.89), according to results published in the study abstract.
Mild creatinine elevation did not appear to affect survival in this study, according to the investigator. Survival was not significantly different between patients with normal creatinine and those with creatinine up to 1.5 times the upper limit of normal. However, higher levels of creatinine were significantly associated with worse survival, Dr. Statler said.
Further analyses showed that these survival findings by creatinine level held up specifically in the African American subgroup as well, Dr. Statler said in the press conference.
Dr. Statler provided no disclosures related to the presentation. Study coauthors described disclosures related to Amgen, SimulStat, Bristol-Myers Squibb, Takeda, Pfizer, Novartis, Celgene Corporation, Abbvie, and Incyte, among others.
SOURCE: Statler A et al. ASH 2019, Abstract 381.
REPORTING FROM ASH 2019
FDA approves acalabrutinib for CLL, SLL treatment
The Food and Drug Administration has approved acalabrutinib (Calquence) as initial or subsequent treatment for adults with chronic lymphocytic leukemia (CLL) or small lymphocytic leukemia (SLL).
The approval came as part of Project Orbis, a collaboration among the FDA, the Australian Therapeutic Goods Administration, and Health Canada. The program allows for the concurrent submission of review of oncology drug applications among the various agencies.
Acalabrutinib, a bruton tyrosin kinase inhibitor, is already approved in the United States for the treatment of adults with mantle cell lymphoma who have received at least one prior therapy. The FDA granted breakthrough therapy designation to acalabrutinib as a monotherapy for adults with CLL in August 2019, allowing for an expedited review.
The approval in CLL/SLL was based on results from two randomized clinical trials comparing acalabrutinib with other standard treatments. In the first trial, patients with previously untreated CLL who received acalabrutinib had a longer progression-free survival time, compared with patients who received standard treatment. A similar result was seen in the second trial among patients with previously treated CLL.
The most common adverse events associated with acalabrutinib include anemia, neutropenia, upper respiratory tract infection, thrombocytopenia, headache, diarrhea, and musculoskeletal pain. Patients receiving the drug should be monitored for symptoms of arrhythmia, serious infection, bleeding, and low blood count. Full prescribing information can be found on the FDA website.
The Food and Drug Administration has approved acalabrutinib (Calquence) as initial or subsequent treatment for adults with chronic lymphocytic leukemia (CLL) or small lymphocytic leukemia (SLL).
The approval came as part of Project Orbis, a collaboration among the FDA, the Australian Therapeutic Goods Administration, and Health Canada. The program allows for the concurrent submission of review of oncology drug applications among the various agencies.
Acalabrutinib, a bruton tyrosin kinase inhibitor, is already approved in the United States for the treatment of adults with mantle cell lymphoma who have received at least one prior therapy. The FDA granted breakthrough therapy designation to acalabrutinib as a monotherapy for adults with CLL in August 2019, allowing for an expedited review.
The approval in CLL/SLL was based on results from two randomized clinical trials comparing acalabrutinib with other standard treatments. In the first trial, patients with previously untreated CLL who received acalabrutinib had a longer progression-free survival time, compared with patients who received standard treatment. A similar result was seen in the second trial among patients with previously treated CLL.
The most common adverse events associated with acalabrutinib include anemia, neutropenia, upper respiratory tract infection, thrombocytopenia, headache, diarrhea, and musculoskeletal pain. Patients receiving the drug should be monitored for symptoms of arrhythmia, serious infection, bleeding, and low blood count. Full prescribing information can be found on the FDA website.
The Food and Drug Administration has approved acalabrutinib (Calquence) as initial or subsequent treatment for adults with chronic lymphocytic leukemia (CLL) or small lymphocytic leukemia (SLL).
The approval came as part of Project Orbis, a collaboration among the FDA, the Australian Therapeutic Goods Administration, and Health Canada. The program allows for the concurrent submission of review of oncology drug applications among the various agencies.
Acalabrutinib, a bruton tyrosin kinase inhibitor, is already approved in the United States for the treatment of adults with mantle cell lymphoma who have received at least one prior therapy. The FDA granted breakthrough therapy designation to acalabrutinib as a monotherapy for adults with CLL in August 2019, allowing for an expedited review.
The approval in CLL/SLL was based on results from two randomized clinical trials comparing acalabrutinib with other standard treatments. In the first trial, patients with previously untreated CLL who received acalabrutinib had a longer progression-free survival time, compared with patients who received standard treatment. A similar result was seen in the second trial among patients with previously treated CLL.
The most common adverse events associated with acalabrutinib include anemia, neutropenia, upper respiratory tract infection, thrombocytopenia, headache, diarrhea, and musculoskeletal pain. Patients receiving the drug should be monitored for symptoms of arrhythmia, serious infection, bleeding, and low blood count. Full prescribing information can be found on the FDA website.
Will TP53-mutated AML respond to immunotherapy?
NATIONAL HARBOR, MD. – New research has shown increased immune infiltration in patients with TP53-mutated acute myeloid leukemia (AML).
Patients with TP53-mutated AML had higher levels of T-cell infiltration, immune checkpoint molecules, and interferon (IFN)–gamma signaling than patients with wild-type TP53.
These findings may indicate that patients with TP53-mutated AML will respond to T-cell targeting immunotherapies, but more investigation is needed, according to Sergio Rutella, MD, PhD, of Nottingham (England) Trent University.
Dr. Rutella described the findings at the annual meeting of the Society for Immunotherapy of Cancer.
He and his colleagues recently identified subgroups of AML, called “immune infiltrated” and “immune depleted,” that can predict chemotherapy resistance and response to flotetuzumab (ASH 2019, Abstract 460). However, the team has not determined the genetic drivers of immune infiltration in AML.*
With the current study, Dr. Rutella and his colleagues wanted to determine if TP53 mutations are associated with the AML immune milieu and see if TP53-mutated patients might benefit from immunotherapy.
Discovery cohort
The researchers first analyzed 147 patients with non-promyelocytic AML from the Cancer Genome Atlas. In total, 9% of these patients (n = 13) had TP53-mutated AML. The researchers assessed how 45 immune gene and biological activity signatures correlated with prognostic molecular lesions (TP53 mutations, FLT3-ITD, etc.) and clinical outcomes in this cohort.
The data showed that immune subtypes were associated with overall survival (OS). The median OS was 11.8 months in patients with immune-infiltrated AML, 16.4 months in patients with intermediate AML, and 25.8 months in patients with immune-depleted AML.
The inflammatory chemokine score (P = .011), IDO1 score (P = .027), IFN-gamma score (P = .036), and B7H3 score (P = .045) were all significantly associated with OS. In fact, these factors were all better predictors of OS than cytogenetic risk score (P = .049).
The IFN-gamma score, inflammatory chemokine score, and lymphoid score were all significantly higher in TP53-mutated patients than in patients with RUNX1 mutations, NPM1 mutations, FLT3-ITD (with or without NPM1 mutations), and TET2/DNMT3A/ASXL1 mutations (P values ranging from less than .0001 to .05).
Likewise, the tumor inflammation signature score was significantly higher among TP53-mutated patients than among patients with NPM1 mutations, FLT3-ITD (with or without NPM1 mutations), and TET2/DNMT3A/ASXL1 mutations (P values ranging from less than .0001 to .01).
Validation cohort and bone marrow samples
The researchers also looked at data from a validation cohort, which consisted of 140 patients with non-promyelocytic AML in the Beat AML Master Trial. Twelve percent of these patients (n = 17) had TP53 mutations.
Data in this cohort showed that CD3G messenger RNA (mRNA) was significantly higher in TP53-mutated AML than in TP53-wild-type AML (P = .04). The same was true for CD8A mRNA (P = .0002) and GZMB mRNA (P = .0005).
Likewise, IFN-gamma mRNA (P = .0052), IFIT2 mRNA (P = .0064), and IFIT3 mRNA (P = .003) were all significantly higher in patients with TP53-mutated AML.
Lastly, the researchers analyzed gene expression profiles of bone marrow samples from patients with AML, 36 with mutated TP53 and 24 with wild-type TP53.
The team found that IFN-gamma–induced genes (IFNG and IRF1), markers of T-cell infiltration (CD8A and CD3G) and senescence (EOMES, KLRD1, and HRAS), immune checkpoint molecules (IDO1, LAG3, PDL1, and VISTA), effector function molecules (GZMB, GZMK, and GZMM), and proinflammatory cytokines (IL17A and TNF) were all significantly overexpressed in TP53-mutated AML.
Among the top overexpressed genes in TP53-mutated AML were genes associated with IFN signaling and inflammation pathways – IL-33, IL-6, IFN-gamma, OASL, RIPK2, TNFAIP3, CSF1, and PTGER4. The IL-17 and TNF signaling pathways were the most enriched pathways in TP53-mutated AML.
“Our analysis of primary bone marrow samples showed that TP53-mutated samples are enriched in IL-17, TNF, and IFN signaling molecules, and show higher levels of T-cell infiltrations and immune checkpoints relative to their wild-type counterparts,” Dr. Rutella said.
“The in silico analysis indicated that TP53-mutated cases will show higher levels of T-cell infiltration, immune checkpoints, and IFN-gamma signaling, compared with AML subgroups without risk-defining molecular lesions,” he added. “This is speculative. Whether TP53-mutated AML can be amenable to respond to T-cell targeting immunotherapies is still to be determined.”
Dr. Rutella reported research support from NanoString Technologies, MacroGenics, and Kura Oncology.
SOURCE: Rutella S et al. SITC 2019. Abstract O3.
*This article was updated on 11/19/2019.
NATIONAL HARBOR, MD. – New research has shown increased immune infiltration in patients with TP53-mutated acute myeloid leukemia (AML).
Patients with TP53-mutated AML had higher levels of T-cell infiltration, immune checkpoint molecules, and interferon (IFN)–gamma signaling than patients with wild-type TP53.
These findings may indicate that patients with TP53-mutated AML will respond to T-cell targeting immunotherapies, but more investigation is needed, according to Sergio Rutella, MD, PhD, of Nottingham (England) Trent University.
Dr. Rutella described the findings at the annual meeting of the Society for Immunotherapy of Cancer.
He and his colleagues recently identified subgroups of AML, called “immune infiltrated” and “immune depleted,” that can predict chemotherapy resistance and response to flotetuzumab (ASH 2019, Abstract 460). However, the team has not determined the genetic drivers of immune infiltration in AML.*
With the current study, Dr. Rutella and his colleagues wanted to determine if TP53 mutations are associated with the AML immune milieu and see if TP53-mutated patients might benefit from immunotherapy.
Discovery cohort
The researchers first analyzed 147 patients with non-promyelocytic AML from the Cancer Genome Atlas. In total, 9% of these patients (n = 13) had TP53-mutated AML. The researchers assessed how 45 immune gene and biological activity signatures correlated with prognostic molecular lesions (TP53 mutations, FLT3-ITD, etc.) and clinical outcomes in this cohort.
The data showed that immune subtypes were associated with overall survival (OS). The median OS was 11.8 months in patients with immune-infiltrated AML, 16.4 months in patients with intermediate AML, and 25.8 months in patients with immune-depleted AML.
The inflammatory chemokine score (P = .011), IDO1 score (P = .027), IFN-gamma score (P = .036), and B7H3 score (P = .045) were all significantly associated with OS. In fact, these factors were all better predictors of OS than cytogenetic risk score (P = .049).
The IFN-gamma score, inflammatory chemokine score, and lymphoid score were all significantly higher in TP53-mutated patients than in patients with RUNX1 mutations, NPM1 mutations, FLT3-ITD (with or without NPM1 mutations), and TET2/DNMT3A/ASXL1 mutations (P values ranging from less than .0001 to .05).
Likewise, the tumor inflammation signature score was significantly higher among TP53-mutated patients than among patients with NPM1 mutations, FLT3-ITD (with or without NPM1 mutations), and TET2/DNMT3A/ASXL1 mutations (P values ranging from less than .0001 to .01).
Validation cohort and bone marrow samples
The researchers also looked at data from a validation cohort, which consisted of 140 patients with non-promyelocytic AML in the Beat AML Master Trial. Twelve percent of these patients (n = 17) had TP53 mutations.
Data in this cohort showed that CD3G messenger RNA (mRNA) was significantly higher in TP53-mutated AML than in TP53-wild-type AML (P = .04). The same was true for CD8A mRNA (P = .0002) and GZMB mRNA (P = .0005).
Likewise, IFN-gamma mRNA (P = .0052), IFIT2 mRNA (P = .0064), and IFIT3 mRNA (P = .003) were all significantly higher in patients with TP53-mutated AML.
Lastly, the researchers analyzed gene expression profiles of bone marrow samples from patients with AML, 36 with mutated TP53 and 24 with wild-type TP53.
The team found that IFN-gamma–induced genes (IFNG and IRF1), markers of T-cell infiltration (CD8A and CD3G) and senescence (EOMES, KLRD1, and HRAS), immune checkpoint molecules (IDO1, LAG3, PDL1, and VISTA), effector function molecules (GZMB, GZMK, and GZMM), and proinflammatory cytokines (IL17A and TNF) were all significantly overexpressed in TP53-mutated AML.
Among the top overexpressed genes in TP53-mutated AML were genes associated with IFN signaling and inflammation pathways – IL-33, IL-6, IFN-gamma, OASL, RIPK2, TNFAIP3, CSF1, and PTGER4. The IL-17 and TNF signaling pathways were the most enriched pathways in TP53-mutated AML.
“Our analysis of primary bone marrow samples showed that TP53-mutated samples are enriched in IL-17, TNF, and IFN signaling molecules, and show higher levels of T-cell infiltrations and immune checkpoints relative to their wild-type counterparts,” Dr. Rutella said.
“The in silico analysis indicated that TP53-mutated cases will show higher levels of T-cell infiltration, immune checkpoints, and IFN-gamma signaling, compared with AML subgroups without risk-defining molecular lesions,” he added. “This is speculative. Whether TP53-mutated AML can be amenable to respond to T-cell targeting immunotherapies is still to be determined.”
Dr. Rutella reported research support from NanoString Technologies, MacroGenics, and Kura Oncology.
SOURCE: Rutella S et al. SITC 2019. Abstract O3.
*This article was updated on 11/19/2019.
NATIONAL HARBOR, MD. – New research has shown increased immune infiltration in patients with TP53-mutated acute myeloid leukemia (AML).
Patients with TP53-mutated AML had higher levels of T-cell infiltration, immune checkpoint molecules, and interferon (IFN)–gamma signaling than patients with wild-type TP53.
These findings may indicate that patients with TP53-mutated AML will respond to T-cell targeting immunotherapies, but more investigation is needed, according to Sergio Rutella, MD, PhD, of Nottingham (England) Trent University.
Dr. Rutella described the findings at the annual meeting of the Society for Immunotherapy of Cancer.
He and his colleagues recently identified subgroups of AML, called “immune infiltrated” and “immune depleted,” that can predict chemotherapy resistance and response to flotetuzumab (ASH 2019, Abstract 460). However, the team has not determined the genetic drivers of immune infiltration in AML.*
With the current study, Dr. Rutella and his colleagues wanted to determine if TP53 mutations are associated with the AML immune milieu and see if TP53-mutated patients might benefit from immunotherapy.
Discovery cohort
The researchers first analyzed 147 patients with non-promyelocytic AML from the Cancer Genome Atlas. In total, 9% of these patients (n = 13) had TP53-mutated AML. The researchers assessed how 45 immune gene and biological activity signatures correlated with prognostic molecular lesions (TP53 mutations, FLT3-ITD, etc.) and clinical outcomes in this cohort.
The data showed that immune subtypes were associated with overall survival (OS). The median OS was 11.8 months in patients with immune-infiltrated AML, 16.4 months in patients with intermediate AML, and 25.8 months in patients with immune-depleted AML.
The inflammatory chemokine score (P = .011), IDO1 score (P = .027), IFN-gamma score (P = .036), and B7H3 score (P = .045) were all significantly associated with OS. In fact, these factors were all better predictors of OS than cytogenetic risk score (P = .049).
The IFN-gamma score, inflammatory chemokine score, and lymphoid score were all significantly higher in TP53-mutated patients than in patients with RUNX1 mutations, NPM1 mutations, FLT3-ITD (with or without NPM1 mutations), and TET2/DNMT3A/ASXL1 mutations (P values ranging from less than .0001 to .05).
Likewise, the tumor inflammation signature score was significantly higher among TP53-mutated patients than among patients with NPM1 mutations, FLT3-ITD (with or without NPM1 mutations), and TET2/DNMT3A/ASXL1 mutations (P values ranging from less than .0001 to .01).
Validation cohort and bone marrow samples
The researchers also looked at data from a validation cohort, which consisted of 140 patients with non-promyelocytic AML in the Beat AML Master Trial. Twelve percent of these patients (n = 17) had TP53 mutations.
Data in this cohort showed that CD3G messenger RNA (mRNA) was significantly higher in TP53-mutated AML than in TP53-wild-type AML (P = .04). The same was true for CD8A mRNA (P = .0002) and GZMB mRNA (P = .0005).
Likewise, IFN-gamma mRNA (P = .0052), IFIT2 mRNA (P = .0064), and IFIT3 mRNA (P = .003) were all significantly higher in patients with TP53-mutated AML.
Lastly, the researchers analyzed gene expression profiles of bone marrow samples from patients with AML, 36 with mutated TP53 and 24 with wild-type TP53.
The team found that IFN-gamma–induced genes (IFNG and IRF1), markers of T-cell infiltration (CD8A and CD3G) and senescence (EOMES, KLRD1, and HRAS), immune checkpoint molecules (IDO1, LAG3, PDL1, and VISTA), effector function molecules (GZMB, GZMK, and GZMM), and proinflammatory cytokines (IL17A and TNF) were all significantly overexpressed in TP53-mutated AML.
Among the top overexpressed genes in TP53-mutated AML were genes associated with IFN signaling and inflammation pathways – IL-33, IL-6, IFN-gamma, OASL, RIPK2, TNFAIP3, CSF1, and PTGER4. The IL-17 and TNF signaling pathways were the most enriched pathways in TP53-mutated AML.
“Our analysis of primary bone marrow samples showed that TP53-mutated samples are enriched in IL-17, TNF, and IFN signaling molecules, and show higher levels of T-cell infiltrations and immune checkpoints relative to their wild-type counterparts,” Dr. Rutella said.
“The in silico analysis indicated that TP53-mutated cases will show higher levels of T-cell infiltration, immune checkpoints, and IFN-gamma signaling, compared with AML subgroups without risk-defining molecular lesions,” he added. “This is speculative. Whether TP53-mutated AML can be amenable to respond to T-cell targeting immunotherapies is still to be determined.”
Dr. Rutella reported research support from NanoString Technologies, MacroGenics, and Kura Oncology.
SOURCE: Rutella S et al. SITC 2019. Abstract O3.
*This article was updated on 11/19/2019.
REPORTING FROM SITC 2019
Researchers seek a way to predict cognitive deficits in children treated for ALL
Researchers are attempting to determine, early in the treatment process, which children with acute lymphoblastic leukemia (ALL) have an increased risk of neurocognitive deficits after chemotherapy.
The goal of the researchers’ project (5R01CA220568-02) is to determine if gene variants and biomarkers associated with oxidative stress, neuroinflammation, and folate physiology correlate with cognitive decline during and after chemotherapy. Ideally, certain variants and biomarkers will reveal patients who might benefit from interventions to prevent or even reverse cognitive deficits.
Peter D. Cole, MD, of Rutgers Cancer Institute, New Brunswick, N.J., and colleagues are conducting this research in patients from the DFCI-16-001 trial (NCT03020030). This multicenter, phase 3 study is enrolling patients (aged 1-21 years) with B- or T-cell ALL who then receive a multidrug chemotherapy regimen.
Dr. Cole and colleagues are analyzing a subset of patients from the trial, looking for relationships between chemotherapy-induced neurocognitive changes, gene variants, and changes in biomarkers detected in cerebrospinal fluid (CSF).
“We’re looking at a broad panel of target gene variants that are associated with either drug metabolism, defenses against oxidative stress, neuroinflammation, or folate physiology,” Dr. Cole said in an interview.
This includes variants Dr. Cole and colleagues identified in a previous, retrospective study of ALL survivors. The researchers found that survivors who were homozygous for NOS3 894T, had a variant SLCO2A1 G allele, or had at least one GSTP1 T allele were more likely to exhibit cognitive deficits (J Clin Oncol. 2015 Jul 1;33[19]:2205-11).
The researchers are also analyzing CSF samples, looking for changes in tau protein, homocysteine, homocysteic acid, the adenosylmethionine to adenosylhomocysteine ratio, and other biomarkers of oxidative stress, neuroinflammation, and folate physiology. The CSF is collected at five time points: the start of chemotherapy, day 18, the start of first consolidation, the end of first consolidation, and 7 weeks later in second consolidation.
Cognitive testing
While Dr. Cole is leading the genetic and biomarker analyses, Stephen A. Sands, PsyD, of Memorial Sloan Kettering Cancer Center in New York, is leading the cognitive testing.
The researchers are evaluating patients for cognitive decline using computerized tests from a company called Cogstate. The tests are designed to assess functions such as processing speed, attention, visual learning, and working memory. The tests are administered on an iPad and involve tasks like identifying features of playing cards and finding the correct way through a maze.
The patients – aged 3 years and older – undergo cognitive testing at six time points: baseline, which is any time between days 8 and 32 of induction (except within 72 hours after sedation or anesthesia); at first consolidation; the end of central nervous system therapy; 1 year into chemotherapy; the end of chemotherapy; and 1 year after chemotherapy ends.
In a prior study, Cogstate testing proved reliable for detecting neurocognitive changes in patients undergoing treatment for ALL (Support Care Cancer. 2017;25[2]:449-57). In the current study, the researchers are supplementing Cogstate test results with Wechsler IQ tests administered 1 year after patients complete chemotherapy.
Dr. Sands noted that Cogstate tests provide benefits over the Wechsler “paper-and-pencil” tests. One benefit is that Cogstate tests can be given more often without inducing practice effects (J Clin Exp Neuropsychol. 2006 Oct;28[7]:1095-112). Another is that Cogstate tests can be administered by anyone with a bachelor’s degree who has undergone the appropriate training, while Wechsler IQ tests must be given by psychologists.
Preliminary results
This research is ongoing, so it’s too early to announce any discoveries, but the study is moving along as planned.
“The preliminary data we have so far are demonstrating the validity of the study,” Dr. Cole said. “Things are going well. We’re able to do the cognitive testing and collect the samples that we need and ship them without losing the integrity of the samples.”
Dr. Sands noted that enrollment has been encouraging. As this is a substudy of DFCI-16-001, the researchers must obtain consent separately from the main study. Dr. Sands said about 89% of parents involved in the main study have agreed to enroll their children in the substudy.
Dr. Sands also said that early results from Cogstate testing have revealed patients who are experiencing cognitive decline during treatment. The researchers still have to determine if these results correlate with any biomarkers or gene variants.
Potential interventions
If the researchers can pinpoint patients at risk for cognitive deficits, the next step will be to investigate pharmacologic and behavioral interventions.
Dr. Cole said he is particularly interested in treatments that reduce oxidative stress, such as dextromethorphan and memantine. Dextromethorphan has been shown to resolve symptoms of methotrexate-induced neurotoxicity in patients (Pediatr Hematol Oncol. 2002 Jul-Aug;19[5]:319-27), and memantine reduced memory deficits in animals treated with methotrexate (Clin Cancer Res. 2013 Aug 15;19[16]:4446-54).
“Memantine hasn’t been used in kids with leukemia yet, but it’s something that I’d like to see brought to a clinical trial,” Dr. Cole said.
Dr. Sands pointed to other potential pharmacologic interventions, including the stimulants methylphenidate and modafinil. Both drugs have been shown to improve cognitive deficits in cancer survivors (J Clin Oncol. 2001 Mar 15;19[6]:1802-8; Cancer. 2009 Jun 15; 115[12]: 2605-16).
Computer-based cognitive training tools may be another option. One such tool, Lumosity, improved executive functions in a study of breast cancer survivors (Clin Breast Cancer. 2013 Aug;13[4]:299-306). Another tool, CogMed, improved working memory in survivors of brain tumors and ALL (Psychooncology. 2013 Aug; 22[8]: 1856-65).
Other behavioral interventions might include sleep hygiene and exercise. Sleep hygiene has been shown to improve cognitive function in childhood cancer survivors (Cancer. 2011 Jun 1;117[11]:2559-68), and a recent study revealed an association between exercise intolerance and negative neurocognitive outcomes in ALL survivors (Cancer. 2019 Oct 21. doi: 10.1002/cncr.32510).
“What we need to figure out is which children will respond to which interventions,” Dr. Sands said, adding that interventions will likely need to be combined.
“It’s not going to be one thing that will work for everybody,” he said. “It’s going to be: What packages of things will work for different people?”
Dr. Sands and Dr. Cole reported having no relevant financial disclosures.
Researchers are attempting to determine, early in the treatment process, which children with acute lymphoblastic leukemia (ALL) have an increased risk of neurocognitive deficits after chemotherapy.
The goal of the researchers’ project (5R01CA220568-02) is to determine if gene variants and biomarkers associated with oxidative stress, neuroinflammation, and folate physiology correlate with cognitive decline during and after chemotherapy. Ideally, certain variants and biomarkers will reveal patients who might benefit from interventions to prevent or even reverse cognitive deficits.
Peter D. Cole, MD, of Rutgers Cancer Institute, New Brunswick, N.J., and colleagues are conducting this research in patients from the DFCI-16-001 trial (NCT03020030). This multicenter, phase 3 study is enrolling patients (aged 1-21 years) with B- or T-cell ALL who then receive a multidrug chemotherapy regimen.
Dr. Cole and colleagues are analyzing a subset of patients from the trial, looking for relationships between chemotherapy-induced neurocognitive changes, gene variants, and changes in biomarkers detected in cerebrospinal fluid (CSF).
“We’re looking at a broad panel of target gene variants that are associated with either drug metabolism, defenses against oxidative stress, neuroinflammation, or folate physiology,” Dr. Cole said in an interview.
This includes variants Dr. Cole and colleagues identified in a previous, retrospective study of ALL survivors. The researchers found that survivors who were homozygous for NOS3 894T, had a variant SLCO2A1 G allele, or had at least one GSTP1 T allele were more likely to exhibit cognitive deficits (J Clin Oncol. 2015 Jul 1;33[19]:2205-11).
The researchers are also analyzing CSF samples, looking for changes in tau protein, homocysteine, homocysteic acid, the adenosylmethionine to adenosylhomocysteine ratio, and other biomarkers of oxidative stress, neuroinflammation, and folate physiology. The CSF is collected at five time points: the start of chemotherapy, day 18, the start of first consolidation, the end of first consolidation, and 7 weeks later in second consolidation.
Cognitive testing
While Dr. Cole is leading the genetic and biomarker analyses, Stephen A. Sands, PsyD, of Memorial Sloan Kettering Cancer Center in New York, is leading the cognitive testing.
The researchers are evaluating patients for cognitive decline using computerized tests from a company called Cogstate. The tests are designed to assess functions such as processing speed, attention, visual learning, and working memory. The tests are administered on an iPad and involve tasks like identifying features of playing cards and finding the correct way through a maze.
The patients – aged 3 years and older – undergo cognitive testing at six time points: baseline, which is any time between days 8 and 32 of induction (except within 72 hours after sedation or anesthesia); at first consolidation; the end of central nervous system therapy; 1 year into chemotherapy; the end of chemotherapy; and 1 year after chemotherapy ends.
In a prior study, Cogstate testing proved reliable for detecting neurocognitive changes in patients undergoing treatment for ALL (Support Care Cancer. 2017;25[2]:449-57). In the current study, the researchers are supplementing Cogstate test results with Wechsler IQ tests administered 1 year after patients complete chemotherapy.
Dr. Sands noted that Cogstate tests provide benefits over the Wechsler “paper-and-pencil” tests. One benefit is that Cogstate tests can be given more often without inducing practice effects (J Clin Exp Neuropsychol. 2006 Oct;28[7]:1095-112). Another is that Cogstate tests can be administered by anyone with a bachelor’s degree who has undergone the appropriate training, while Wechsler IQ tests must be given by psychologists.
Preliminary results
This research is ongoing, so it’s too early to announce any discoveries, but the study is moving along as planned.
“The preliminary data we have so far are demonstrating the validity of the study,” Dr. Cole said. “Things are going well. We’re able to do the cognitive testing and collect the samples that we need and ship them without losing the integrity of the samples.”
Dr. Sands noted that enrollment has been encouraging. As this is a substudy of DFCI-16-001, the researchers must obtain consent separately from the main study. Dr. Sands said about 89% of parents involved in the main study have agreed to enroll their children in the substudy.
Dr. Sands also said that early results from Cogstate testing have revealed patients who are experiencing cognitive decline during treatment. The researchers still have to determine if these results correlate with any biomarkers or gene variants.
Potential interventions
If the researchers can pinpoint patients at risk for cognitive deficits, the next step will be to investigate pharmacologic and behavioral interventions.
Dr. Cole said he is particularly interested in treatments that reduce oxidative stress, such as dextromethorphan and memantine. Dextromethorphan has been shown to resolve symptoms of methotrexate-induced neurotoxicity in patients (Pediatr Hematol Oncol. 2002 Jul-Aug;19[5]:319-27), and memantine reduced memory deficits in animals treated with methotrexate (Clin Cancer Res. 2013 Aug 15;19[16]:4446-54).
“Memantine hasn’t been used in kids with leukemia yet, but it’s something that I’d like to see brought to a clinical trial,” Dr. Cole said.
Dr. Sands pointed to other potential pharmacologic interventions, including the stimulants methylphenidate and modafinil. Both drugs have been shown to improve cognitive deficits in cancer survivors (J Clin Oncol. 2001 Mar 15;19[6]:1802-8; Cancer. 2009 Jun 15; 115[12]: 2605-16).
Computer-based cognitive training tools may be another option. One such tool, Lumosity, improved executive functions in a study of breast cancer survivors (Clin Breast Cancer. 2013 Aug;13[4]:299-306). Another tool, CogMed, improved working memory in survivors of brain tumors and ALL (Psychooncology. 2013 Aug; 22[8]: 1856-65).
Other behavioral interventions might include sleep hygiene and exercise. Sleep hygiene has been shown to improve cognitive function in childhood cancer survivors (Cancer. 2011 Jun 1;117[11]:2559-68), and a recent study revealed an association between exercise intolerance and negative neurocognitive outcomes in ALL survivors (Cancer. 2019 Oct 21. doi: 10.1002/cncr.32510).
“What we need to figure out is which children will respond to which interventions,” Dr. Sands said, adding that interventions will likely need to be combined.
“It’s not going to be one thing that will work for everybody,” he said. “It’s going to be: What packages of things will work for different people?”
Dr. Sands and Dr. Cole reported having no relevant financial disclosures.
Researchers are attempting to determine, early in the treatment process, which children with acute lymphoblastic leukemia (ALL) have an increased risk of neurocognitive deficits after chemotherapy.
The goal of the researchers’ project (5R01CA220568-02) is to determine if gene variants and biomarkers associated with oxidative stress, neuroinflammation, and folate physiology correlate with cognitive decline during and after chemotherapy. Ideally, certain variants and biomarkers will reveal patients who might benefit from interventions to prevent or even reverse cognitive deficits.
Peter D. Cole, MD, of Rutgers Cancer Institute, New Brunswick, N.J., and colleagues are conducting this research in patients from the DFCI-16-001 trial (NCT03020030). This multicenter, phase 3 study is enrolling patients (aged 1-21 years) with B- or T-cell ALL who then receive a multidrug chemotherapy regimen.
Dr. Cole and colleagues are analyzing a subset of patients from the trial, looking for relationships between chemotherapy-induced neurocognitive changes, gene variants, and changes in biomarkers detected in cerebrospinal fluid (CSF).
“We’re looking at a broad panel of target gene variants that are associated with either drug metabolism, defenses against oxidative stress, neuroinflammation, or folate physiology,” Dr. Cole said in an interview.
This includes variants Dr. Cole and colleagues identified in a previous, retrospective study of ALL survivors. The researchers found that survivors who were homozygous for NOS3 894T, had a variant SLCO2A1 G allele, or had at least one GSTP1 T allele were more likely to exhibit cognitive deficits (J Clin Oncol. 2015 Jul 1;33[19]:2205-11).
The researchers are also analyzing CSF samples, looking for changes in tau protein, homocysteine, homocysteic acid, the adenosylmethionine to adenosylhomocysteine ratio, and other biomarkers of oxidative stress, neuroinflammation, and folate physiology. The CSF is collected at five time points: the start of chemotherapy, day 18, the start of first consolidation, the end of first consolidation, and 7 weeks later in second consolidation.
Cognitive testing
While Dr. Cole is leading the genetic and biomarker analyses, Stephen A. Sands, PsyD, of Memorial Sloan Kettering Cancer Center in New York, is leading the cognitive testing.
The researchers are evaluating patients for cognitive decline using computerized tests from a company called Cogstate. The tests are designed to assess functions such as processing speed, attention, visual learning, and working memory. The tests are administered on an iPad and involve tasks like identifying features of playing cards and finding the correct way through a maze.
The patients – aged 3 years and older – undergo cognitive testing at six time points: baseline, which is any time between days 8 and 32 of induction (except within 72 hours after sedation or anesthesia); at first consolidation; the end of central nervous system therapy; 1 year into chemotherapy; the end of chemotherapy; and 1 year after chemotherapy ends.
In a prior study, Cogstate testing proved reliable for detecting neurocognitive changes in patients undergoing treatment for ALL (Support Care Cancer. 2017;25[2]:449-57). In the current study, the researchers are supplementing Cogstate test results with Wechsler IQ tests administered 1 year after patients complete chemotherapy.
Dr. Sands noted that Cogstate tests provide benefits over the Wechsler “paper-and-pencil” tests. One benefit is that Cogstate tests can be given more often without inducing practice effects (J Clin Exp Neuropsychol. 2006 Oct;28[7]:1095-112). Another is that Cogstate tests can be administered by anyone with a bachelor’s degree who has undergone the appropriate training, while Wechsler IQ tests must be given by psychologists.
Preliminary results
This research is ongoing, so it’s too early to announce any discoveries, but the study is moving along as planned.
“The preliminary data we have so far are demonstrating the validity of the study,” Dr. Cole said. “Things are going well. We’re able to do the cognitive testing and collect the samples that we need and ship them without losing the integrity of the samples.”
Dr. Sands noted that enrollment has been encouraging. As this is a substudy of DFCI-16-001, the researchers must obtain consent separately from the main study. Dr. Sands said about 89% of parents involved in the main study have agreed to enroll their children in the substudy.
Dr. Sands also said that early results from Cogstate testing have revealed patients who are experiencing cognitive decline during treatment. The researchers still have to determine if these results correlate with any biomarkers or gene variants.
Potential interventions
If the researchers can pinpoint patients at risk for cognitive deficits, the next step will be to investigate pharmacologic and behavioral interventions.
Dr. Cole said he is particularly interested in treatments that reduce oxidative stress, such as dextromethorphan and memantine. Dextromethorphan has been shown to resolve symptoms of methotrexate-induced neurotoxicity in patients (Pediatr Hematol Oncol. 2002 Jul-Aug;19[5]:319-27), and memantine reduced memory deficits in animals treated with methotrexate (Clin Cancer Res. 2013 Aug 15;19[16]:4446-54).
“Memantine hasn’t been used in kids with leukemia yet, but it’s something that I’d like to see brought to a clinical trial,” Dr. Cole said.
Dr. Sands pointed to other potential pharmacologic interventions, including the stimulants methylphenidate and modafinil. Both drugs have been shown to improve cognitive deficits in cancer survivors (J Clin Oncol. 2001 Mar 15;19[6]:1802-8; Cancer. 2009 Jun 15; 115[12]: 2605-16).
Computer-based cognitive training tools may be another option. One such tool, Lumosity, improved executive functions in a study of breast cancer survivors (Clin Breast Cancer. 2013 Aug;13[4]:299-306). Another tool, CogMed, improved working memory in survivors of brain tumors and ALL (Psychooncology. 2013 Aug; 22[8]: 1856-65).
Other behavioral interventions might include sleep hygiene and exercise. Sleep hygiene has been shown to improve cognitive function in childhood cancer survivors (Cancer. 2011 Jun 1;117[11]:2559-68), and a recent study revealed an association between exercise intolerance and negative neurocognitive outcomes in ALL survivors (Cancer. 2019 Oct 21. doi: 10.1002/cncr.32510).
“What we need to figure out is which children will respond to which interventions,” Dr. Sands said, adding that interventions will likely need to be combined.
“It’s not going to be one thing that will work for everybody,” he said. “It’s going to be: What packages of things will work for different people?”
Dr. Sands and Dr. Cole reported having no relevant financial disclosures.
Gene signature may help guide initial CLL treatment choice
A novel 17-gene expression signature may help guide the choice of initial treatment in patients with IGHV-unmutated chronic lymphocytic leukemia (CLL), according to findings of a retrospective dual cohort study.
“[Fludarabine, cyclophosphamide, and rituximab] was the first regimen to improve progression-free survival and overall survival in patients with chronic lymphocytic leukaemia, and has become a gold-standard chemoimmunotherapy regimen in physically fit patients,” wrote the investigators, who were led by Carmen D. Herling, MD, of the Center for Integrated Oncology, Cologne, Germany; and Kevin R. Coombes, PhD, of Ohio State University, Columbus.
While several studies demonstrate that young, fit patients with mutated IGHV gene and no high-risk cytogenetic abnormalities achieve durable remission with the FCR (fludarabine, cyclophosphamide, and rituximab) regimen, there have been no studies to identify if this is true for patients with unmutated IGHV gene, they reported in the Lancet Oncology.
The investigators performed transcriptional profiling using peripheral blood samples collected from two cohorts of patients with CLL who were treated with frontline FCR.
The discovery and training cohort consisted of 101 patients (65% with IGHV-unmutated disease) treated at the MD Anderson Cancer Center who had a median follow-up of about 12 years. The validation cohort consisted of 109 patients with IGHV-unmutated disease treated on the German CLL8 single-arm trial who had a median follow-up of about 6 years.
A total of 1,136 genes showed a significant univariate association with time to progression. Ultimately, 17 of these genes – most of them involved in purine metabolism and oxidative phosphorylation – were included in the expression signature.
Among patients with IGHV-unmutated CLL, the 17-gene signature discriminated between two groups having differing time to progression after their frontline FCR chemoimmunotherapy: an unfavorable prognosis group and an intermediate prognosis group.
The unfavorable prognosis group had a significantly higher relative risk of progression in both the discovery/training cohort (hazard ratio, 3.83; P less than .0001) and the validation cohort (HR, 1.90; P = .008). In the validation cohort, the median time to progression was 39 months among patients with a signature-defined unfavorable prognosis, compared with 59 months among patients with a signature-defined intermediate prognosis.
“We would recommend testing the value of the 17-gene signature in a prospective study that compares FCR treatment with alternative therapies, such as ibrutinib, as part of a randomised clinical trial,” the investigators wrote.
Dr. Herling reported financial disclosures related to Hoffmann-La Roche, and Dr. Coombes reported grants from the National Institutes of Health. The study was funded by the Chronic Lymphocytic Leukaemia Global Research Foundation and the National Institutes of Health/National Cancer Institute.
SOURCE: Herling CD et al. Lancet Oncol. 2019;20(11):1576-86.
A novel 17-gene expression signature may help guide the choice of initial treatment in patients with IGHV-unmutated chronic lymphocytic leukemia (CLL), according to findings of a retrospective dual cohort study.
“[Fludarabine, cyclophosphamide, and rituximab] was the first regimen to improve progression-free survival and overall survival in patients with chronic lymphocytic leukaemia, and has become a gold-standard chemoimmunotherapy regimen in physically fit patients,” wrote the investigators, who were led by Carmen D. Herling, MD, of the Center for Integrated Oncology, Cologne, Germany; and Kevin R. Coombes, PhD, of Ohio State University, Columbus.
While several studies demonstrate that young, fit patients with mutated IGHV gene and no high-risk cytogenetic abnormalities achieve durable remission with the FCR (fludarabine, cyclophosphamide, and rituximab) regimen, there have been no studies to identify if this is true for patients with unmutated IGHV gene, they reported in the Lancet Oncology.
The investigators performed transcriptional profiling using peripheral blood samples collected from two cohorts of patients with CLL who were treated with frontline FCR.
The discovery and training cohort consisted of 101 patients (65% with IGHV-unmutated disease) treated at the MD Anderson Cancer Center who had a median follow-up of about 12 years. The validation cohort consisted of 109 patients with IGHV-unmutated disease treated on the German CLL8 single-arm trial who had a median follow-up of about 6 years.
A total of 1,136 genes showed a significant univariate association with time to progression. Ultimately, 17 of these genes – most of them involved in purine metabolism and oxidative phosphorylation – were included in the expression signature.
Among patients with IGHV-unmutated CLL, the 17-gene signature discriminated between two groups having differing time to progression after their frontline FCR chemoimmunotherapy: an unfavorable prognosis group and an intermediate prognosis group.
The unfavorable prognosis group had a significantly higher relative risk of progression in both the discovery/training cohort (hazard ratio, 3.83; P less than .0001) and the validation cohort (HR, 1.90; P = .008). In the validation cohort, the median time to progression was 39 months among patients with a signature-defined unfavorable prognosis, compared with 59 months among patients with a signature-defined intermediate prognosis.
“We would recommend testing the value of the 17-gene signature in a prospective study that compares FCR treatment with alternative therapies, such as ibrutinib, as part of a randomised clinical trial,” the investigators wrote.
Dr. Herling reported financial disclosures related to Hoffmann-La Roche, and Dr. Coombes reported grants from the National Institutes of Health. The study was funded by the Chronic Lymphocytic Leukaemia Global Research Foundation and the National Institutes of Health/National Cancer Institute.
SOURCE: Herling CD et al. Lancet Oncol. 2019;20(11):1576-86.
A novel 17-gene expression signature may help guide the choice of initial treatment in patients with IGHV-unmutated chronic lymphocytic leukemia (CLL), according to findings of a retrospective dual cohort study.
“[Fludarabine, cyclophosphamide, and rituximab] was the first regimen to improve progression-free survival and overall survival in patients with chronic lymphocytic leukaemia, and has become a gold-standard chemoimmunotherapy regimen in physically fit patients,” wrote the investigators, who were led by Carmen D. Herling, MD, of the Center for Integrated Oncology, Cologne, Germany; and Kevin R. Coombes, PhD, of Ohio State University, Columbus.
While several studies demonstrate that young, fit patients with mutated IGHV gene and no high-risk cytogenetic abnormalities achieve durable remission with the FCR (fludarabine, cyclophosphamide, and rituximab) regimen, there have been no studies to identify if this is true for patients with unmutated IGHV gene, they reported in the Lancet Oncology.
The investigators performed transcriptional profiling using peripheral blood samples collected from two cohorts of patients with CLL who were treated with frontline FCR.
The discovery and training cohort consisted of 101 patients (65% with IGHV-unmutated disease) treated at the MD Anderson Cancer Center who had a median follow-up of about 12 years. The validation cohort consisted of 109 patients with IGHV-unmutated disease treated on the German CLL8 single-arm trial who had a median follow-up of about 6 years.
A total of 1,136 genes showed a significant univariate association with time to progression. Ultimately, 17 of these genes – most of them involved in purine metabolism and oxidative phosphorylation – were included in the expression signature.
Among patients with IGHV-unmutated CLL, the 17-gene signature discriminated between two groups having differing time to progression after their frontline FCR chemoimmunotherapy: an unfavorable prognosis group and an intermediate prognosis group.
The unfavorable prognosis group had a significantly higher relative risk of progression in both the discovery/training cohort (hazard ratio, 3.83; P less than .0001) and the validation cohort (HR, 1.90; P = .008). In the validation cohort, the median time to progression was 39 months among patients with a signature-defined unfavorable prognosis, compared with 59 months among patients with a signature-defined intermediate prognosis.
“We would recommend testing the value of the 17-gene signature in a prospective study that compares FCR treatment with alternative therapies, such as ibrutinib, as part of a randomised clinical trial,” the investigators wrote.
Dr. Herling reported financial disclosures related to Hoffmann-La Roche, and Dr. Coombes reported grants from the National Institutes of Health. The study was funded by the Chronic Lymphocytic Leukaemia Global Research Foundation and the National Institutes of Health/National Cancer Institute.
SOURCE: Herling CD et al. Lancet Oncol. 2019;20(11):1576-86.
FROM LANCET ONCOLOGY
Caspofungin bests fluconazole for antifungal prophylaxis in young AML patients
Antifungal prophylaxis with caspofungin led to a lower incidence of invasive fungal disease, compared with fluconazole, in children and young adults with acute myeloid leukemia (AML), according to new study findings.
The results suggest caspofungin may be an appropriate prophylactic strategy to prevent invasive fungal disease in younger patients with newly diagnosed AML, reported Brian T. Fisher, DO, of the University of Pennsylvania, Philadelphia, and colleagues. The study was published in JAMA.
The randomized, open-label study included 517 children, adolescents, and young adults with de novo, relapsed, or secondary AML. Study patients received treatment in 115 centers throughout United States and Canada. The median age of patients in the study was 9 years (range, 0-26 years); 56% were male and approximately 69% were white.
Study subjects were randomly assigned to receive antifungal prophylaxis with 70 mg/m2 (maximum dose 70 mg/day) of intravenous caspofungin on day 1, followed by 50 mg/m2 per day (maximum dose 50 mg/day) thereafter, or age-dosed intravenous or oral fluconazole.
Prophylactic therapy was initiated 24-72 hours after the completion of each chemotherapy cycle, and was maintained until the end of the neutropenic period following each cycle.
At 5-month follow-up, the cumulative incidence rate of probable or proven invasive fungal disease was 3.1% (95% confidence interval, 1.3%-7.0%) in the caspofungin arm, compared with 7.2% (95% CI, 4.4%-11.8%) in the fluconazole arm (overall P = .03).
In addition, the 5-month cumulative incidence rate of probable or proven invasive aspergillosis infection was 0.5% (95%CI, 0.1%-3.5%) in patients who received caspofungin, compared with 3.1% (95% CI, 1.4%-6.9%) in patients who received fluconazole (overall P = .046).
“No statistically significant differences in empirical antifungal therapy or 2-year overall survival were observed,” they reported.
With respect to safety, the most frequently reported adverse events were hypokalemia (22 events in the caspofungin arm vs. 13 in the fluconazole arm), respiratory failure (6 events in the caspofungin arm vs. 9 in the fluconazole arm), and elevated alanine transaminase (4 events in the caspofungin arm vs. 8 in the fluconazole arm).
The researchers acknowledged a key limitation of the study was the short duration of follow-up. As a result, the precision of some comparative measures may have been reduced.
The National Cancer Institute funded the study. The authors reported financial affiliations with Astellas, Celgene, Leadiant Biosciences, Merck, Nabriva Therapeutics, Novartis, Pfizer, Shire, and T2 Biosystems.
SOURCE: Fisher BT et al. JAMA. 2019;322(17):1673-81.
Antifungal prophylaxis with caspofungin led to a lower incidence of invasive fungal disease, compared with fluconazole, in children and young adults with acute myeloid leukemia (AML), according to new study findings.
The results suggest caspofungin may be an appropriate prophylactic strategy to prevent invasive fungal disease in younger patients with newly diagnosed AML, reported Brian T. Fisher, DO, of the University of Pennsylvania, Philadelphia, and colleagues. The study was published in JAMA.
The randomized, open-label study included 517 children, adolescents, and young adults with de novo, relapsed, or secondary AML. Study patients received treatment in 115 centers throughout United States and Canada. The median age of patients in the study was 9 years (range, 0-26 years); 56% were male and approximately 69% were white.
Study subjects were randomly assigned to receive antifungal prophylaxis with 70 mg/m2 (maximum dose 70 mg/day) of intravenous caspofungin on day 1, followed by 50 mg/m2 per day (maximum dose 50 mg/day) thereafter, or age-dosed intravenous or oral fluconazole.
Prophylactic therapy was initiated 24-72 hours after the completion of each chemotherapy cycle, and was maintained until the end of the neutropenic period following each cycle.
At 5-month follow-up, the cumulative incidence rate of probable or proven invasive fungal disease was 3.1% (95% confidence interval, 1.3%-7.0%) in the caspofungin arm, compared with 7.2% (95% CI, 4.4%-11.8%) in the fluconazole arm (overall P = .03).
In addition, the 5-month cumulative incidence rate of probable or proven invasive aspergillosis infection was 0.5% (95%CI, 0.1%-3.5%) in patients who received caspofungin, compared with 3.1% (95% CI, 1.4%-6.9%) in patients who received fluconazole (overall P = .046).
“No statistically significant differences in empirical antifungal therapy or 2-year overall survival were observed,” they reported.
With respect to safety, the most frequently reported adverse events were hypokalemia (22 events in the caspofungin arm vs. 13 in the fluconazole arm), respiratory failure (6 events in the caspofungin arm vs. 9 in the fluconazole arm), and elevated alanine transaminase (4 events in the caspofungin arm vs. 8 in the fluconazole arm).
The researchers acknowledged a key limitation of the study was the short duration of follow-up. As a result, the precision of some comparative measures may have been reduced.
The National Cancer Institute funded the study. The authors reported financial affiliations with Astellas, Celgene, Leadiant Biosciences, Merck, Nabriva Therapeutics, Novartis, Pfizer, Shire, and T2 Biosystems.
SOURCE: Fisher BT et al. JAMA. 2019;322(17):1673-81.
Antifungal prophylaxis with caspofungin led to a lower incidence of invasive fungal disease, compared with fluconazole, in children and young adults with acute myeloid leukemia (AML), according to new study findings.
The results suggest caspofungin may be an appropriate prophylactic strategy to prevent invasive fungal disease in younger patients with newly diagnosed AML, reported Brian T. Fisher, DO, of the University of Pennsylvania, Philadelphia, and colleagues. The study was published in JAMA.
The randomized, open-label study included 517 children, adolescents, and young adults with de novo, relapsed, or secondary AML. Study patients received treatment in 115 centers throughout United States and Canada. The median age of patients in the study was 9 years (range, 0-26 years); 56% were male and approximately 69% were white.
Study subjects were randomly assigned to receive antifungal prophylaxis with 70 mg/m2 (maximum dose 70 mg/day) of intravenous caspofungin on day 1, followed by 50 mg/m2 per day (maximum dose 50 mg/day) thereafter, or age-dosed intravenous or oral fluconazole.
Prophylactic therapy was initiated 24-72 hours after the completion of each chemotherapy cycle, and was maintained until the end of the neutropenic period following each cycle.
At 5-month follow-up, the cumulative incidence rate of probable or proven invasive fungal disease was 3.1% (95% confidence interval, 1.3%-7.0%) in the caspofungin arm, compared with 7.2% (95% CI, 4.4%-11.8%) in the fluconazole arm (overall P = .03).
In addition, the 5-month cumulative incidence rate of probable or proven invasive aspergillosis infection was 0.5% (95%CI, 0.1%-3.5%) in patients who received caspofungin, compared with 3.1% (95% CI, 1.4%-6.9%) in patients who received fluconazole (overall P = .046).
“No statistically significant differences in empirical antifungal therapy or 2-year overall survival were observed,” they reported.
With respect to safety, the most frequently reported adverse events were hypokalemia (22 events in the caspofungin arm vs. 13 in the fluconazole arm), respiratory failure (6 events in the caspofungin arm vs. 9 in the fluconazole arm), and elevated alanine transaminase (4 events in the caspofungin arm vs. 8 in the fluconazole arm).
The researchers acknowledged a key limitation of the study was the short duration of follow-up. As a result, the precision of some comparative measures may have been reduced.
The National Cancer Institute funded the study. The authors reported financial affiliations with Astellas, Celgene, Leadiant Biosciences, Merck, Nabriva Therapeutics, Novartis, Pfizer, Shire, and T2 Biosystems.
SOURCE: Fisher BT et al. JAMA. 2019;322(17):1673-81.
FROM JAMA
Consider renal function in TLS risk assessment of venetoclax-treated CLL
EDINBURGH – Impaired renal function may indicate excess risk of tumor lysis syndrome (TLS) in venetoclax-treated chronic lymphocytic leukemia (CLL) patients and should be considered when assessing TLS risk, according to findings from a retrospective cohort study.
Complex karyotype may also affect TLS risk, Anthony Mato, MD, reported at the International Workshop on Chronic Lymphocytic Leukemia.
Of 339 CLL patients who were treated with venetoclax, 38%, 34%, and 28% were considered to have low, medium, or high risk for TLS, respectively, according to the standard definition based on absolute lymphocyte count as a measure of tumor burden and/or lymph node size.
TLS occurred in 35 patients (10%), including 26 cases of laboratory-confirmed TLS and 9 clinical TLS cases; 1 patient required dialysis and 1 death occurred, which was attributable to the TLS, Dr. Mato of Memorial Sloan Kettering Cancer Center, New York, and colleagues reported in a poster at the workshop.
Univariate analysis was performed to “understand baseline factors associated with TLS development during dose escalation,” and it examined sex, creatinine clearance (CrCl), complex karyotype, immunoglobulin heavy chain variable mutation status, prior ibrutinib exposure, venetoclax monotherapy vs. combination therapy, and TLS risk group. The investigators observed no significant difference between the low- and medium-risk patients, therefore those two groups were combined and compared with the high-risk patients.
The univariate analysis showed significant associations between TLS and CrCl (odds ratio, 2.9 for 80 mL/min or less vs. greater than 80 mL/min), complex karyotype (OR, 2.2), and low/medium vs. high TLS risk based on the standard definition (OR, 2.56).
A multivariable analysis of the predictors identified as significant in the univariate analyses showed that standard TLS risk group and CrCl remained independent predictors of TLS.
“Although the odds ratio for complex karyotype suggested potential clinical significance, this did not meet the threshold for statistical significance and was not included in the final model,” they wrote.
The area under the receiver operating characteristic curve for a model including TLS risk group and CrCl was 74.6%, compared with 65% for the area under the ROC curve using the standard tumor burden/lymph node size approach for defining TLS risk, which is described in the venetoclax package insert.
Patients included in the study had a median age of 67 years at venetoclax initiation, 69% were men, 85% were white, and 13% were treated on a clinical trial. Complex karyotype was present in 39%, del(17p) in 43%, and 84% had immunoglobulin heavy chain variable–unmutated disease.
Most patients received venetoclax monotherapy (79%), had relapsed/refractory disease (94%), and had previously received ibrutinib (78%). The median number of prior therapies was 3, but the number ranged from 0-15, the investigators noted.
The findings of this study suggest that, in addition to defining risk based on absolute lymphocyte count and lymph node size, patients with CrCl less than 80 mL/min – indicating impaired renal function – have excess risk of TLS.
Although complex karyotype did not reach statistical significance as an independent predictor of TLS, the findings in this study suggest it “may impact TLS risk and is worthy of further study in larger samples,” they said, concluding that consideration of baseline renal function, and possibly karyotype, could “further guide practitioners in their approach to prophylaxis and patient counseling, allowing for improved safety in the use of this effective agent in CLL.”
Additional planned analyses will focus on TLS risk score development and further refinement of TLS risk stratification, they noted.
Dr. Mato has received grant support, consulting fees, and/or fees for serving on a data and safety monitoring board or advisory board from AbbVie, AstraZeneca, Celgene, Janssen, TG Therapeutics, Pharmacyclics, Loxo, Sunesis, prIME Oncology, Pfizer, Johnson & Johnson, and Regeneron.
EDINBURGH – Impaired renal function may indicate excess risk of tumor lysis syndrome (TLS) in venetoclax-treated chronic lymphocytic leukemia (CLL) patients and should be considered when assessing TLS risk, according to findings from a retrospective cohort study.
Complex karyotype may also affect TLS risk, Anthony Mato, MD, reported at the International Workshop on Chronic Lymphocytic Leukemia.
Of 339 CLL patients who were treated with venetoclax, 38%, 34%, and 28% were considered to have low, medium, or high risk for TLS, respectively, according to the standard definition based on absolute lymphocyte count as a measure of tumor burden and/or lymph node size.
TLS occurred in 35 patients (10%), including 26 cases of laboratory-confirmed TLS and 9 clinical TLS cases; 1 patient required dialysis and 1 death occurred, which was attributable to the TLS, Dr. Mato of Memorial Sloan Kettering Cancer Center, New York, and colleagues reported in a poster at the workshop.
Univariate analysis was performed to “understand baseline factors associated with TLS development during dose escalation,” and it examined sex, creatinine clearance (CrCl), complex karyotype, immunoglobulin heavy chain variable mutation status, prior ibrutinib exposure, venetoclax monotherapy vs. combination therapy, and TLS risk group. The investigators observed no significant difference between the low- and medium-risk patients, therefore those two groups were combined and compared with the high-risk patients.
The univariate analysis showed significant associations between TLS and CrCl (odds ratio, 2.9 for 80 mL/min or less vs. greater than 80 mL/min), complex karyotype (OR, 2.2), and low/medium vs. high TLS risk based on the standard definition (OR, 2.56).
A multivariable analysis of the predictors identified as significant in the univariate analyses showed that standard TLS risk group and CrCl remained independent predictors of TLS.
“Although the odds ratio for complex karyotype suggested potential clinical significance, this did not meet the threshold for statistical significance and was not included in the final model,” they wrote.
The area under the receiver operating characteristic curve for a model including TLS risk group and CrCl was 74.6%, compared with 65% for the area under the ROC curve using the standard tumor burden/lymph node size approach for defining TLS risk, which is described in the venetoclax package insert.
Patients included in the study had a median age of 67 years at venetoclax initiation, 69% were men, 85% were white, and 13% were treated on a clinical trial. Complex karyotype was present in 39%, del(17p) in 43%, and 84% had immunoglobulin heavy chain variable–unmutated disease.
Most patients received venetoclax monotherapy (79%), had relapsed/refractory disease (94%), and had previously received ibrutinib (78%). The median number of prior therapies was 3, but the number ranged from 0-15, the investigators noted.
The findings of this study suggest that, in addition to defining risk based on absolute lymphocyte count and lymph node size, patients with CrCl less than 80 mL/min – indicating impaired renal function – have excess risk of TLS.
Although complex karyotype did not reach statistical significance as an independent predictor of TLS, the findings in this study suggest it “may impact TLS risk and is worthy of further study in larger samples,” they said, concluding that consideration of baseline renal function, and possibly karyotype, could “further guide practitioners in their approach to prophylaxis and patient counseling, allowing for improved safety in the use of this effective agent in CLL.”
Additional planned analyses will focus on TLS risk score development and further refinement of TLS risk stratification, they noted.
Dr. Mato has received grant support, consulting fees, and/or fees for serving on a data and safety monitoring board or advisory board from AbbVie, AstraZeneca, Celgene, Janssen, TG Therapeutics, Pharmacyclics, Loxo, Sunesis, prIME Oncology, Pfizer, Johnson & Johnson, and Regeneron.
EDINBURGH – Impaired renal function may indicate excess risk of tumor lysis syndrome (TLS) in venetoclax-treated chronic lymphocytic leukemia (CLL) patients and should be considered when assessing TLS risk, according to findings from a retrospective cohort study.
Complex karyotype may also affect TLS risk, Anthony Mato, MD, reported at the International Workshop on Chronic Lymphocytic Leukemia.
Of 339 CLL patients who were treated with venetoclax, 38%, 34%, and 28% were considered to have low, medium, or high risk for TLS, respectively, according to the standard definition based on absolute lymphocyte count as a measure of tumor burden and/or lymph node size.
TLS occurred in 35 patients (10%), including 26 cases of laboratory-confirmed TLS and 9 clinical TLS cases; 1 patient required dialysis and 1 death occurred, which was attributable to the TLS, Dr. Mato of Memorial Sloan Kettering Cancer Center, New York, and colleagues reported in a poster at the workshop.
Univariate analysis was performed to “understand baseline factors associated with TLS development during dose escalation,” and it examined sex, creatinine clearance (CrCl), complex karyotype, immunoglobulin heavy chain variable mutation status, prior ibrutinib exposure, venetoclax monotherapy vs. combination therapy, and TLS risk group. The investigators observed no significant difference between the low- and medium-risk patients, therefore those two groups were combined and compared with the high-risk patients.
The univariate analysis showed significant associations between TLS and CrCl (odds ratio, 2.9 for 80 mL/min or less vs. greater than 80 mL/min), complex karyotype (OR, 2.2), and low/medium vs. high TLS risk based on the standard definition (OR, 2.56).
A multivariable analysis of the predictors identified as significant in the univariate analyses showed that standard TLS risk group and CrCl remained independent predictors of TLS.
“Although the odds ratio for complex karyotype suggested potential clinical significance, this did not meet the threshold for statistical significance and was not included in the final model,” they wrote.
The area under the receiver operating characteristic curve for a model including TLS risk group and CrCl was 74.6%, compared with 65% for the area under the ROC curve using the standard tumor burden/lymph node size approach for defining TLS risk, which is described in the venetoclax package insert.
Patients included in the study had a median age of 67 years at venetoclax initiation, 69% were men, 85% were white, and 13% were treated on a clinical trial. Complex karyotype was present in 39%, del(17p) in 43%, and 84% had immunoglobulin heavy chain variable–unmutated disease.
Most patients received venetoclax monotherapy (79%), had relapsed/refractory disease (94%), and had previously received ibrutinib (78%). The median number of prior therapies was 3, but the number ranged from 0-15, the investigators noted.
The findings of this study suggest that, in addition to defining risk based on absolute lymphocyte count and lymph node size, patients with CrCl less than 80 mL/min – indicating impaired renal function – have excess risk of TLS.
Although complex karyotype did not reach statistical significance as an independent predictor of TLS, the findings in this study suggest it “may impact TLS risk and is worthy of further study in larger samples,” they said, concluding that consideration of baseline renal function, and possibly karyotype, could “further guide practitioners in their approach to prophylaxis and patient counseling, allowing for improved safety in the use of this effective agent in CLL.”
Additional planned analyses will focus on TLS risk score development and further refinement of TLS risk stratification, they noted.
Dr. Mato has received grant support, consulting fees, and/or fees for serving on a data and safety monitoring board or advisory board from AbbVie, AstraZeneca, Celgene, Janssen, TG Therapeutics, Pharmacyclics, Loxo, Sunesis, prIME Oncology, Pfizer, Johnson & Johnson, and Regeneron.
REPORTING FROM iwCLL 2019
Hematopoietic cell transplant offers realistic cure in secondary AML
yielding significantly better survival outcomes, according to findings from an observational study.
Although secondary AML has been identified as an independent predictor of poor prognosis, it is not included in current risk classifications that provide the basis of deciding when to perform HCT.
Christer Nilsson, MD, of Karolinska Institute, Stockholm, and colleagues, used two nationwide Swedish registries – the Swedish AML Registry and the Swedish Cancer Registry – to characterize how often HCT is performed in these patients and to evaluate its impact in a real-world setting. The registries include all patients with AML diagnosed between 1997 and 2013.
Their findings are in Biology of Blood and Marrow Transplantation.
The analysis included 3,337 adult patients with AML who were intensively treated and did not have acute promyelocytic leukemia. More than three-quarters of the patients had de novo AML and the remainder had secondary AML that was either therapy related or developed after an antecedent myeloid disease. In total, 100 patients with secondary AML underwent HCT while in first complete remission.
In terms of crude survival at 5 years after diagnosis, patients with secondary AML who did not undergo HCT did very poorly. The survival rate was 0% in those with AML preceded by myeloproliferative neoplasm (MPN-AML), 2% in patients with AML preceded by myelodysplastic syndrome (MDS-AML), and 4% in patients with therapy-related AML (t-AML). In contrast, the 5-year overall survival in patients who underwent HCT at any time point or disease stage was 32% for patients with MPN-AML, 18% for patients with MDS-AML, and 25% for patients t-AML.
These crude survival figures suggest that “HCT is the sole realistic curable treatment option for [secondary] AML,” the researchers wrote.
The researchers also performed a propensity score matching analysis of HCT versus chemotherapy consolidation in patients with secondary AML who had been in first complete remission for more than 90 days. The model matched 45 patients who underwent HCT with 66 patients treated with chemotherapy consolidation. The projected 5-year overall survival was 48% in the HCT group, compared with 20% in the consolidation group (P = .01). Similarly, 5-year relapse-free survival was also higher in the HCT group, compared with the consolidation group (43% vs. 21%, P = .02).
“Ideally, the role of transplantation in [secondary] AML should be evaluated in a prospective randomized trial, minimizing the risk of any bias,” the researchers wrote. “However, such a trial is lacking and most likely will never be performed.”
The researchers concluded that HCT should be considered for all patients with secondary AML who are eligible and fit for transplantation.
The study was supported by the Swedish Cancer Foundation, Swedish Research Council, Stockholm County Council, Gothenberg Medical Society, and Assar Gabrielsson Foundation. The researchers reported having no conflicts of interest.
SOURCE: Nilson C et al. Biol Blood Marrow Tranplant. 2019;25:1770-8.
yielding significantly better survival outcomes, according to findings from an observational study.
Although secondary AML has been identified as an independent predictor of poor prognosis, it is not included in current risk classifications that provide the basis of deciding when to perform HCT.
Christer Nilsson, MD, of Karolinska Institute, Stockholm, and colleagues, used two nationwide Swedish registries – the Swedish AML Registry and the Swedish Cancer Registry – to characterize how often HCT is performed in these patients and to evaluate its impact in a real-world setting. The registries include all patients with AML diagnosed between 1997 and 2013.
Their findings are in Biology of Blood and Marrow Transplantation.
The analysis included 3,337 adult patients with AML who were intensively treated and did not have acute promyelocytic leukemia. More than three-quarters of the patients had de novo AML and the remainder had secondary AML that was either therapy related or developed after an antecedent myeloid disease. In total, 100 patients with secondary AML underwent HCT while in first complete remission.
In terms of crude survival at 5 years after diagnosis, patients with secondary AML who did not undergo HCT did very poorly. The survival rate was 0% in those with AML preceded by myeloproliferative neoplasm (MPN-AML), 2% in patients with AML preceded by myelodysplastic syndrome (MDS-AML), and 4% in patients with therapy-related AML (t-AML). In contrast, the 5-year overall survival in patients who underwent HCT at any time point or disease stage was 32% for patients with MPN-AML, 18% for patients with MDS-AML, and 25% for patients t-AML.
These crude survival figures suggest that “HCT is the sole realistic curable treatment option for [secondary] AML,” the researchers wrote.
The researchers also performed a propensity score matching analysis of HCT versus chemotherapy consolidation in patients with secondary AML who had been in first complete remission for more than 90 days. The model matched 45 patients who underwent HCT with 66 patients treated with chemotherapy consolidation. The projected 5-year overall survival was 48% in the HCT group, compared with 20% in the consolidation group (P = .01). Similarly, 5-year relapse-free survival was also higher in the HCT group, compared with the consolidation group (43% vs. 21%, P = .02).
“Ideally, the role of transplantation in [secondary] AML should be evaluated in a prospective randomized trial, minimizing the risk of any bias,” the researchers wrote. “However, such a trial is lacking and most likely will never be performed.”
The researchers concluded that HCT should be considered for all patients with secondary AML who are eligible and fit for transplantation.
The study was supported by the Swedish Cancer Foundation, Swedish Research Council, Stockholm County Council, Gothenberg Medical Society, and Assar Gabrielsson Foundation. The researchers reported having no conflicts of interest.
SOURCE: Nilson C et al. Biol Blood Marrow Tranplant. 2019;25:1770-8.
yielding significantly better survival outcomes, according to findings from an observational study.
Although secondary AML has been identified as an independent predictor of poor prognosis, it is not included in current risk classifications that provide the basis of deciding when to perform HCT.
Christer Nilsson, MD, of Karolinska Institute, Stockholm, and colleagues, used two nationwide Swedish registries – the Swedish AML Registry and the Swedish Cancer Registry – to characterize how often HCT is performed in these patients and to evaluate its impact in a real-world setting. The registries include all patients with AML diagnosed between 1997 and 2013.
Their findings are in Biology of Blood and Marrow Transplantation.
The analysis included 3,337 adult patients with AML who were intensively treated and did not have acute promyelocytic leukemia. More than three-quarters of the patients had de novo AML and the remainder had secondary AML that was either therapy related or developed after an antecedent myeloid disease. In total, 100 patients with secondary AML underwent HCT while in first complete remission.
In terms of crude survival at 5 years after diagnosis, patients with secondary AML who did not undergo HCT did very poorly. The survival rate was 0% in those with AML preceded by myeloproliferative neoplasm (MPN-AML), 2% in patients with AML preceded by myelodysplastic syndrome (MDS-AML), and 4% in patients with therapy-related AML (t-AML). In contrast, the 5-year overall survival in patients who underwent HCT at any time point or disease stage was 32% for patients with MPN-AML, 18% for patients with MDS-AML, and 25% for patients t-AML.
These crude survival figures suggest that “HCT is the sole realistic curable treatment option for [secondary] AML,” the researchers wrote.
The researchers also performed a propensity score matching analysis of HCT versus chemotherapy consolidation in patients with secondary AML who had been in first complete remission for more than 90 days. The model matched 45 patients who underwent HCT with 66 patients treated with chemotherapy consolidation. The projected 5-year overall survival was 48% in the HCT group, compared with 20% in the consolidation group (P = .01). Similarly, 5-year relapse-free survival was also higher in the HCT group, compared with the consolidation group (43% vs. 21%, P = .02).
“Ideally, the role of transplantation in [secondary] AML should be evaluated in a prospective randomized trial, minimizing the risk of any bias,” the researchers wrote. “However, such a trial is lacking and most likely will never be performed.”
The researchers concluded that HCT should be considered for all patients with secondary AML who are eligible and fit for transplantation.
The study was supported by the Swedish Cancer Foundation, Swedish Research Council, Stockholm County Council, Gothenberg Medical Society, and Assar Gabrielsson Foundation. The researchers reported having no conflicts of interest.
SOURCE: Nilson C et al. Biol Blood Marrow Tranplant. 2019;25:1770-8.
FROM BIOLOGY OF BLOOD AND MARROW TRANSPLANTATION
Exercise intolerance linked to neurocognitive dysfunction in ALL
Exercise intolerance was associated with worse neurocognitive function in adult survivors of pediatric acute lymphoblastic leukemia (ALL), according to results from a cross-sectional study.
The findings suggest additional research is needed to better understand the effects of increased exercise capacity on neurocognitive performance in these patients.
“We used a clinically assessed cohort of childhood cancer survivors participating in the St. Jude Lifetime cohort study to determine whether exercise intolerance, expressed as decreased oxygen uptake, is associated with neurocognitive impairments in long-term survivors of childhood ALL and evaluated whether exercise intolerance mediates the association between chronic cardiac or pulmonary conditions and neurocognitive impairment,” wrote Nicholas S. Phillips, MD, PhD, of St. Jude Children’s Research Hospital in Memphis, Tenn., and colleagues. The results were published in Cancer.
The cross-sectional cohort study included 341 young adult survivors of pediatric ALL and 288 evaluable control participants. Survivors were recruited from 1980 to 2003.
Eligible participants were 18 years or older, and remained alive for a minimum of 5 years post ALL diagnosis. Control subjects were non–first-degree relatives of ALL survivors.
The researchers evaluated exercise capacity using cardiopulmonary exercise testing, expressed as relative peak volume of oxygen (rpkVO2) max scores. Other tests included self-rated questionnaires, as well as a standardized neuropsychological evaluation.
After analysis, the researchers found that ALL survivors had lower mean rpkVO2 scores, compared with control participants (23.45 vs. 33.03 mL/kg per min; P less than .001).
Survivors also had worse performance on several measures of neurocognitive function, including working memory, verbal intelligence, visual-motor speed, and other math and reading domains, compared with controls (all P less than .001).
The researchers also performed a multivariable analysis and found that a 1-unit metabolic equivalent increase in exercise tolerance was associated with significantly increased performance in some neurocognitive measures, including attention, verbal ability, verbal fluency, motor speed, and academics.
“Our research suggests that a minor improvement in exercise tolerance, such as going from sitting on the couch and watching TV, to walking around the block for 30 minutes a day, can have a significant impact on survivors’ intellectual health,” Dr. Phillips said in a statement.
The researchers noted that recent evidence has shown that structured exercise training may benefit younger survivors. “These studies demonstrate that a low-cost, home-based exercise training program can effectively increase cardiopulmonary fitness during and after completion of therapy,” they wrote.
The team acknowledged a key limitation of the study was the cross-sectional design. As a result, the direction of these associations remains unknown, and warrants future study.
The study was supported by the National Institutes of Health and the American Lebanese Syrian Associated Charities. The researchers did not report conflicts of interest.
SOURCE: Phillips NS et al. Cancer. 2019 Oct 21. doi: 10.1002/cncr.32510.
Exercise intolerance was associated with worse neurocognitive function in adult survivors of pediatric acute lymphoblastic leukemia (ALL), according to results from a cross-sectional study.
The findings suggest additional research is needed to better understand the effects of increased exercise capacity on neurocognitive performance in these patients.
“We used a clinically assessed cohort of childhood cancer survivors participating in the St. Jude Lifetime cohort study to determine whether exercise intolerance, expressed as decreased oxygen uptake, is associated with neurocognitive impairments in long-term survivors of childhood ALL and evaluated whether exercise intolerance mediates the association between chronic cardiac or pulmonary conditions and neurocognitive impairment,” wrote Nicholas S. Phillips, MD, PhD, of St. Jude Children’s Research Hospital in Memphis, Tenn., and colleagues. The results were published in Cancer.
The cross-sectional cohort study included 341 young adult survivors of pediatric ALL and 288 evaluable control participants. Survivors were recruited from 1980 to 2003.
Eligible participants were 18 years or older, and remained alive for a minimum of 5 years post ALL diagnosis. Control subjects were non–first-degree relatives of ALL survivors.
The researchers evaluated exercise capacity using cardiopulmonary exercise testing, expressed as relative peak volume of oxygen (rpkVO2) max scores. Other tests included self-rated questionnaires, as well as a standardized neuropsychological evaluation.
After analysis, the researchers found that ALL survivors had lower mean rpkVO2 scores, compared with control participants (23.45 vs. 33.03 mL/kg per min; P less than .001).
Survivors also had worse performance on several measures of neurocognitive function, including working memory, verbal intelligence, visual-motor speed, and other math and reading domains, compared with controls (all P less than .001).
The researchers also performed a multivariable analysis and found that a 1-unit metabolic equivalent increase in exercise tolerance was associated with significantly increased performance in some neurocognitive measures, including attention, verbal ability, verbal fluency, motor speed, and academics.
“Our research suggests that a minor improvement in exercise tolerance, such as going from sitting on the couch and watching TV, to walking around the block for 30 minutes a day, can have a significant impact on survivors’ intellectual health,” Dr. Phillips said in a statement.
The researchers noted that recent evidence has shown that structured exercise training may benefit younger survivors. “These studies demonstrate that a low-cost, home-based exercise training program can effectively increase cardiopulmonary fitness during and after completion of therapy,” they wrote.
The team acknowledged a key limitation of the study was the cross-sectional design. As a result, the direction of these associations remains unknown, and warrants future study.
The study was supported by the National Institutes of Health and the American Lebanese Syrian Associated Charities. The researchers did not report conflicts of interest.
SOURCE: Phillips NS et al. Cancer. 2019 Oct 21. doi: 10.1002/cncr.32510.
Exercise intolerance was associated with worse neurocognitive function in adult survivors of pediatric acute lymphoblastic leukemia (ALL), according to results from a cross-sectional study.
The findings suggest additional research is needed to better understand the effects of increased exercise capacity on neurocognitive performance in these patients.
“We used a clinically assessed cohort of childhood cancer survivors participating in the St. Jude Lifetime cohort study to determine whether exercise intolerance, expressed as decreased oxygen uptake, is associated with neurocognitive impairments in long-term survivors of childhood ALL and evaluated whether exercise intolerance mediates the association between chronic cardiac or pulmonary conditions and neurocognitive impairment,” wrote Nicholas S. Phillips, MD, PhD, of St. Jude Children’s Research Hospital in Memphis, Tenn., and colleagues. The results were published in Cancer.
The cross-sectional cohort study included 341 young adult survivors of pediatric ALL and 288 evaluable control participants. Survivors were recruited from 1980 to 2003.
Eligible participants were 18 years or older, and remained alive for a minimum of 5 years post ALL diagnosis. Control subjects were non–first-degree relatives of ALL survivors.
The researchers evaluated exercise capacity using cardiopulmonary exercise testing, expressed as relative peak volume of oxygen (rpkVO2) max scores. Other tests included self-rated questionnaires, as well as a standardized neuropsychological evaluation.
After analysis, the researchers found that ALL survivors had lower mean rpkVO2 scores, compared with control participants (23.45 vs. 33.03 mL/kg per min; P less than .001).
Survivors also had worse performance on several measures of neurocognitive function, including working memory, verbal intelligence, visual-motor speed, and other math and reading domains, compared with controls (all P less than .001).
The researchers also performed a multivariable analysis and found that a 1-unit metabolic equivalent increase in exercise tolerance was associated with significantly increased performance in some neurocognitive measures, including attention, verbal ability, verbal fluency, motor speed, and academics.
“Our research suggests that a minor improvement in exercise tolerance, such as going from sitting on the couch and watching TV, to walking around the block for 30 minutes a day, can have a significant impact on survivors’ intellectual health,” Dr. Phillips said in a statement.
The researchers noted that recent evidence has shown that structured exercise training may benefit younger survivors. “These studies demonstrate that a low-cost, home-based exercise training program can effectively increase cardiopulmonary fitness during and after completion of therapy,” they wrote.
The team acknowledged a key limitation of the study was the cross-sectional design. As a result, the direction of these associations remains unknown, and warrants future study.
The study was supported by the National Institutes of Health and the American Lebanese Syrian Associated Charities. The researchers did not report conflicts of interest.
SOURCE: Phillips NS et al. Cancer. 2019 Oct 21. doi: 10.1002/cncr.32510.
FROM CANCER