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DKMS: Small nonprofit to world’s largest stem cell donor registry
When Mechtild Harf was diagnosed with acute leukemia in 1990, physicians told her and her husband Peter that a bone marrow transplant was her best hope for survival. Back then, her native Germany had only 3,000 registered donors, and none was a match.
“My dad just went crazy, you know, to save his wife,” recalled Katharina Harf, who was a young teen at the time of her mother’s diagnosis.
In the course of 1 year, the Harfs recruited more than 68,000 potential bone marrow donors, but their heroic efforts couldn’t save Mechtild.
“She unfortunately didn’t make it. She died because of leukemia,” Katharina said.
Although Mechtild Harf did not survive, her legacy lives on in the bone marrow and stem cell donor recruitment organization DKMS (Deutsche Knochenmarkspenderdatei, or German Bone Marrow Donor Center).
In May of 1991, Peter Harf and Gerhard Ehninger, MD, the hematologist who treated Mechtild, founded DKMS with the mission, as its website states, “to provide as many blood cancer patients as possible with a second chance at life.”
From its German roots, the nonprofit organization has extended its mission to the United States (where it was initially known as Delete Blood Cancer DKMS), Poland, the United Kingdom, Chile, and in 2021, to South Africa.
Three decades after her mother’s death, Katharina Harf serves as Executive Chairwoman of DKMS U.S., based in New York.
World’s largest registry
“DKMS has the largest number of unrelated donors of any organization in the world,” noted Richard E. Champlin, MD, chair of the department of stem cell transplantation and cellular therapy at the University of Texas MD Anderson Cancer Center in Houston.
“In a large fraction of our donor searches, we find matches that are in the DKMS registry,” he said in an interview,
Alexander Schmidt, MD, PhD, global chief medical officer for DKMS, said that approximately 25% of all registered donors worldwide were recruited by his organization, and 39% of all unrelated donor transplants are made with peripheral blood stem cell or bone marrow products, donated by volunteers who are recruited by DKMS.
Since its founding, DKMS has registered 7.1 million potential donors in Germany, who made a total of 80,000 stem cell donations. DKMS U.S., which began operations in 2004, has registered 1.1 million donors and enabled 4,700 donations.
Global partners
DKMS partners with donor centers and recruitment organizations in each country where it operates. In the United States, DKMS works with the National Marrow Donor Program (NMDP) and its “Be The Match” donor registry.
“DKMS donors, both those from DKMS in Germany and those from DKMS in the United States are also listed in the NMDP registry, to make it easier for US search coordinators to accept these donors,” Dr. Schmidt explained in an interview.
The international cooperation and coordination makes it possible for a donor in the UK, for example, to save a life of a patient in Germany, the U.S., Chile, India, or many other parts of the world – anywhere that can be reached in time for a patient in need to receive a stem cell donation.
Pandemic affects donations
But, as with just about every aspect of life, the COVID-19 pandemic has created enormous challenges for recruiters, donor centers, and stem cell transplant centers.
Dr. Schmidt said that decline in donations during the pandemic was less severe than initially feared, with a decrease of just 3.5% in 2020, compared with the prepandemic year of 2019. In contrast, though, the average annual growth rate for donations prior to the pandemic was about 4%.
“Nevertheless, at the beginning of the pandemic in March 2020, for a few days things looked quite terrible, because all the borders were closed and flights were canceled, and about 50% of all stem cell products go abroad, and between 20% and 25% go intercontinental,” Dr. Schmidt said.
However, close cooperation and coordination between donor centers and national health authorities soon resolved the problem and helped insure that the flow of life-saving donations could continue with minimal disruption, he noted.
“I don’t think we had any product that could not be delivered at the end of the day, due to the pandemic,” he told this news organization.
Workforce and clinical problems
Although the flow of donations within and between nations has continued, the COVID-19 pandemic has had profound negative effects on transplant centers, particularly during the wave of infections caused by the Omicron variant, according to a transplant expert.
“With this most recent strain and how transmissible it is, what we’re dealing with is mass workforce shortages,” said Yi-Bin Chen, MD, director of the bone marrow transplant program at Massachusetts General Hospital in Boston.
“On top of a short-staffed hospital, you then take a very transmissible variant and deplete it even more due to the need to quarantine,” he said in an interview.
Both Dr. Champlin and Dr. Chen said that on-again, off-again pandemic travel bans and donor illnesses have necessitated first obtaining products and cryopreserving them before starting the recipient on a conditioning regimen for the transplant.
“The problem is that, while you can preserve peripheral blood stem cells pretty reliably, cryopreserving bone marrow is a bit more difficult,” Dr. Chen said.
In addition, evidence from recent studies comparing stem cell sources suggest that outcomes are less good with cryopreserved products than with fresh products, and with peripheral blood stem cells compared with bone marrow.
“But you’ve got to make do. A transplant with a cryopreserved product is better than no transplant,” Dr. Chen said.
To make things even more frustrating, as the pandemic waxed and waned throughout 2020 and 2021, the recommendations from donor centers seesawed between using fresh or cryopreserved product, making it difficult to plan a transplant for an individual patient.
The Omicron wave has also resulted in a much higher rate of donor dropout than anticipated, making it that much harder to schedule a transplant, Dr. Chen noted.
‘Every patient saved’
The pandemic will eventually subside, however, while the need for stem cell transplantation to treat hematologic malignancies will continue.
DKMS recently launched special aid programs to improve access to stem cell transplants in developing nations by offering financial support, free HLA typing, and other services.
In addition to its core mission of recruiting donors, DKMS is dedicated to improving the quality and efficiency of stem cell transplants. For example, in 2017 scientists in DKMS’ Life Science Lab created an antibody test for donor cytomegalovirus (CMV) infection, using a simple buccal swab rather than a more invasive blood sample. CMV infections can compromise the integrity of stem cell grafts and could be fatal to immunocompromised transplant recipients.
The last word goes to Mechtild Harf’s daughter Katharina.
“My big dream is that every patient will be saved from blood cancer,” she said in a video posted on the DKMS website. “When they get sick, we have a solution for them, whether it’s because they need a donor, with research, building hospitals, providing them with the best medical care we can. I will just keep fighting and keep spreading the word, recruiting donors, raising money – all the things that it takes for us to delete blood cancer.”
“I have to believe that this dream will come true because otherwise, why dream, right?” she said.
Dr. Champlin was the recipient of a Mechtild Harf Science Award and is a member of the board of DKMS U.S. Dr. Schmidt is employed by DKMS. Dr. Chen reported having no relevant disclosures.
When Mechtild Harf was diagnosed with acute leukemia in 1990, physicians told her and her husband Peter that a bone marrow transplant was her best hope for survival. Back then, her native Germany had only 3,000 registered donors, and none was a match.
“My dad just went crazy, you know, to save his wife,” recalled Katharina Harf, who was a young teen at the time of her mother’s diagnosis.
In the course of 1 year, the Harfs recruited more than 68,000 potential bone marrow donors, but their heroic efforts couldn’t save Mechtild.
“She unfortunately didn’t make it. She died because of leukemia,” Katharina said.
Although Mechtild Harf did not survive, her legacy lives on in the bone marrow and stem cell donor recruitment organization DKMS (Deutsche Knochenmarkspenderdatei, or German Bone Marrow Donor Center).
In May of 1991, Peter Harf and Gerhard Ehninger, MD, the hematologist who treated Mechtild, founded DKMS with the mission, as its website states, “to provide as many blood cancer patients as possible with a second chance at life.”
From its German roots, the nonprofit organization has extended its mission to the United States (where it was initially known as Delete Blood Cancer DKMS), Poland, the United Kingdom, Chile, and in 2021, to South Africa.
Three decades after her mother’s death, Katharina Harf serves as Executive Chairwoman of DKMS U.S., based in New York.
World’s largest registry
“DKMS has the largest number of unrelated donors of any organization in the world,” noted Richard E. Champlin, MD, chair of the department of stem cell transplantation and cellular therapy at the University of Texas MD Anderson Cancer Center in Houston.
“In a large fraction of our donor searches, we find matches that are in the DKMS registry,” he said in an interview,
Alexander Schmidt, MD, PhD, global chief medical officer for DKMS, said that approximately 25% of all registered donors worldwide were recruited by his organization, and 39% of all unrelated donor transplants are made with peripheral blood stem cell or bone marrow products, donated by volunteers who are recruited by DKMS.
Since its founding, DKMS has registered 7.1 million potential donors in Germany, who made a total of 80,000 stem cell donations. DKMS U.S., which began operations in 2004, has registered 1.1 million donors and enabled 4,700 donations.
Global partners
DKMS partners with donor centers and recruitment organizations in each country where it operates. In the United States, DKMS works with the National Marrow Donor Program (NMDP) and its “Be The Match” donor registry.
“DKMS donors, both those from DKMS in Germany and those from DKMS in the United States are also listed in the NMDP registry, to make it easier for US search coordinators to accept these donors,” Dr. Schmidt explained in an interview.
The international cooperation and coordination makes it possible for a donor in the UK, for example, to save a life of a patient in Germany, the U.S., Chile, India, or many other parts of the world – anywhere that can be reached in time for a patient in need to receive a stem cell donation.
Pandemic affects donations
But, as with just about every aspect of life, the COVID-19 pandemic has created enormous challenges for recruiters, donor centers, and stem cell transplant centers.
Dr. Schmidt said that decline in donations during the pandemic was less severe than initially feared, with a decrease of just 3.5% in 2020, compared with the prepandemic year of 2019. In contrast, though, the average annual growth rate for donations prior to the pandemic was about 4%.
“Nevertheless, at the beginning of the pandemic in March 2020, for a few days things looked quite terrible, because all the borders were closed and flights were canceled, and about 50% of all stem cell products go abroad, and between 20% and 25% go intercontinental,” Dr. Schmidt said.
However, close cooperation and coordination between donor centers and national health authorities soon resolved the problem and helped insure that the flow of life-saving donations could continue with minimal disruption, he noted.
“I don’t think we had any product that could not be delivered at the end of the day, due to the pandemic,” he told this news organization.
Workforce and clinical problems
Although the flow of donations within and between nations has continued, the COVID-19 pandemic has had profound negative effects on transplant centers, particularly during the wave of infections caused by the Omicron variant, according to a transplant expert.
“With this most recent strain and how transmissible it is, what we’re dealing with is mass workforce shortages,” said Yi-Bin Chen, MD, director of the bone marrow transplant program at Massachusetts General Hospital in Boston.
“On top of a short-staffed hospital, you then take a very transmissible variant and deplete it even more due to the need to quarantine,” he said in an interview.
Both Dr. Champlin and Dr. Chen said that on-again, off-again pandemic travel bans and donor illnesses have necessitated first obtaining products and cryopreserving them before starting the recipient on a conditioning regimen for the transplant.
“The problem is that, while you can preserve peripheral blood stem cells pretty reliably, cryopreserving bone marrow is a bit more difficult,” Dr. Chen said.
In addition, evidence from recent studies comparing stem cell sources suggest that outcomes are less good with cryopreserved products than with fresh products, and with peripheral blood stem cells compared with bone marrow.
“But you’ve got to make do. A transplant with a cryopreserved product is better than no transplant,” Dr. Chen said.
To make things even more frustrating, as the pandemic waxed and waned throughout 2020 and 2021, the recommendations from donor centers seesawed between using fresh or cryopreserved product, making it difficult to plan a transplant for an individual patient.
The Omicron wave has also resulted in a much higher rate of donor dropout than anticipated, making it that much harder to schedule a transplant, Dr. Chen noted.
‘Every patient saved’
The pandemic will eventually subside, however, while the need for stem cell transplantation to treat hematologic malignancies will continue.
DKMS recently launched special aid programs to improve access to stem cell transplants in developing nations by offering financial support, free HLA typing, and other services.
In addition to its core mission of recruiting donors, DKMS is dedicated to improving the quality and efficiency of stem cell transplants. For example, in 2017 scientists in DKMS’ Life Science Lab created an antibody test for donor cytomegalovirus (CMV) infection, using a simple buccal swab rather than a more invasive blood sample. CMV infections can compromise the integrity of stem cell grafts and could be fatal to immunocompromised transplant recipients.
The last word goes to Mechtild Harf’s daughter Katharina.
“My big dream is that every patient will be saved from blood cancer,” she said in a video posted on the DKMS website. “When they get sick, we have a solution for them, whether it’s because they need a donor, with research, building hospitals, providing them with the best medical care we can. I will just keep fighting and keep spreading the word, recruiting donors, raising money – all the things that it takes for us to delete blood cancer.”
“I have to believe that this dream will come true because otherwise, why dream, right?” she said.
Dr. Champlin was the recipient of a Mechtild Harf Science Award and is a member of the board of DKMS U.S. Dr. Schmidt is employed by DKMS. Dr. Chen reported having no relevant disclosures.
When Mechtild Harf was diagnosed with acute leukemia in 1990, physicians told her and her husband Peter that a bone marrow transplant was her best hope for survival. Back then, her native Germany had only 3,000 registered donors, and none was a match.
“My dad just went crazy, you know, to save his wife,” recalled Katharina Harf, who was a young teen at the time of her mother’s diagnosis.
In the course of 1 year, the Harfs recruited more than 68,000 potential bone marrow donors, but their heroic efforts couldn’t save Mechtild.
“She unfortunately didn’t make it. She died because of leukemia,” Katharina said.
Although Mechtild Harf did not survive, her legacy lives on in the bone marrow and stem cell donor recruitment organization DKMS (Deutsche Knochenmarkspenderdatei, or German Bone Marrow Donor Center).
In May of 1991, Peter Harf and Gerhard Ehninger, MD, the hematologist who treated Mechtild, founded DKMS with the mission, as its website states, “to provide as many blood cancer patients as possible with a second chance at life.”
From its German roots, the nonprofit organization has extended its mission to the United States (where it was initially known as Delete Blood Cancer DKMS), Poland, the United Kingdom, Chile, and in 2021, to South Africa.
Three decades after her mother’s death, Katharina Harf serves as Executive Chairwoman of DKMS U.S., based in New York.
World’s largest registry
“DKMS has the largest number of unrelated donors of any organization in the world,” noted Richard E. Champlin, MD, chair of the department of stem cell transplantation and cellular therapy at the University of Texas MD Anderson Cancer Center in Houston.
“In a large fraction of our donor searches, we find matches that are in the DKMS registry,” he said in an interview,
Alexander Schmidt, MD, PhD, global chief medical officer for DKMS, said that approximately 25% of all registered donors worldwide were recruited by his organization, and 39% of all unrelated donor transplants are made with peripheral blood stem cell or bone marrow products, donated by volunteers who are recruited by DKMS.
Since its founding, DKMS has registered 7.1 million potential donors in Germany, who made a total of 80,000 stem cell donations. DKMS U.S., which began operations in 2004, has registered 1.1 million donors and enabled 4,700 donations.
Global partners
DKMS partners with donor centers and recruitment organizations in each country where it operates. In the United States, DKMS works with the National Marrow Donor Program (NMDP) and its “Be The Match” donor registry.
“DKMS donors, both those from DKMS in Germany and those from DKMS in the United States are also listed in the NMDP registry, to make it easier for US search coordinators to accept these donors,” Dr. Schmidt explained in an interview.
The international cooperation and coordination makes it possible for a donor in the UK, for example, to save a life of a patient in Germany, the U.S., Chile, India, or many other parts of the world – anywhere that can be reached in time for a patient in need to receive a stem cell donation.
Pandemic affects donations
But, as with just about every aspect of life, the COVID-19 pandemic has created enormous challenges for recruiters, donor centers, and stem cell transplant centers.
Dr. Schmidt said that decline in donations during the pandemic was less severe than initially feared, with a decrease of just 3.5% in 2020, compared with the prepandemic year of 2019. In contrast, though, the average annual growth rate for donations prior to the pandemic was about 4%.
“Nevertheless, at the beginning of the pandemic in March 2020, for a few days things looked quite terrible, because all the borders were closed and flights were canceled, and about 50% of all stem cell products go abroad, and between 20% and 25% go intercontinental,” Dr. Schmidt said.
However, close cooperation and coordination between donor centers and national health authorities soon resolved the problem and helped insure that the flow of life-saving donations could continue with minimal disruption, he noted.
“I don’t think we had any product that could not be delivered at the end of the day, due to the pandemic,” he told this news organization.
Workforce and clinical problems
Although the flow of donations within and between nations has continued, the COVID-19 pandemic has had profound negative effects on transplant centers, particularly during the wave of infections caused by the Omicron variant, according to a transplant expert.
“With this most recent strain and how transmissible it is, what we’re dealing with is mass workforce shortages,” said Yi-Bin Chen, MD, director of the bone marrow transplant program at Massachusetts General Hospital in Boston.
“On top of a short-staffed hospital, you then take a very transmissible variant and deplete it even more due to the need to quarantine,” he said in an interview.
Both Dr. Champlin and Dr. Chen said that on-again, off-again pandemic travel bans and donor illnesses have necessitated first obtaining products and cryopreserving them before starting the recipient on a conditioning regimen for the transplant.
“The problem is that, while you can preserve peripheral blood stem cells pretty reliably, cryopreserving bone marrow is a bit more difficult,” Dr. Chen said.
In addition, evidence from recent studies comparing stem cell sources suggest that outcomes are less good with cryopreserved products than with fresh products, and with peripheral blood stem cells compared with bone marrow.
“But you’ve got to make do. A transplant with a cryopreserved product is better than no transplant,” Dr. Chen said.
To make things even more frustrating, as the pandemic waxed and waned throughout 2020 and 2021, the recommendations from donor centers seesawed between using fresh or cryopreserved product, making it difficult to plan a transplant for an individual patient.
The Omicron wave has also resulted in a much higher rate of donor dropout than anticipated, making it that much harder to schedule a transplant, Dr. Chen noted.
‘Every patient saved’
The pandemic will eventually subside, however, while the need for stem cell transplantation to treat hematologic malignancies will continue.
DKMS recently launched special aid programs to improve access to stem cell transplants in developing nations by offering financial support, free HLA typing, and other services.
In addition to its core mission of recruiting donors, DKMS is dedicated to improving the quality and efficiency of stem cell transplants. For example, in 2017 scientists in DKMS’ Life Science Lab created an antibody test for donor cytomegalovirus (CMV) infection, using a simple buccal swab rather than a more invasive blood sample. CMV infections can compromise the integrity of stem cell grafts and could be fatal to immunocompromised transplant recipients.
The last word goes to Mechtild Harf’s daughter Katharina.
“My big dream is that every patient will be saved from blood cancer,” she said in a video posted on the DKMS website. “When they get sick, we have a solution for them, whether it’s because they need a donor, with research, building hospitals, providing them with the best medical care we can. I will just keep fighting and keep spreading the word, recruiting donors, raising money – all the things that it takes for us to delete blood cancer.”
“I have to believe that this dream will come true because otherwise, why dream, right?” she said.
Dr. Champlin was the recipient of a Mechtild Harf Science Award and is a member of the board of DKMS U.S. Dr. Schmidt is employed by DKMS. Dr. Chen reported having no relevant disclosures.
In some lymphomas, ibrutinib yields “almost unheard-of” survival rates
, compared with R-CHOP alone, new research shows.
The findings, published Nov. 4, 2021, in Cancer Cell, come from a subanalysis of the phase 3 Phoenix trial. They show that patients with DLBCL aged 60 and younger with either the MCD or N1 genetic subtype had 3-year event-free survival rates as high as 100% when treated with ibrutinib plus R-CHOP, whereas with R-CHOP chemotherapy alone, the survival rates were approximately half of that rate.
“A 100% 3-year event-free survival is almost unheard-of in DLBCL and speaks to the intense dependency of these subtypes to constitutive B cell receptor signaling and their vulnerability to ibrutinib,” first author Louis M. Staudt, MD, of the Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Md., said in an interview.
“By contrast, in ABC DLBCL, the addition of ibrutinib to R-CHOP increased event-free survival by 12.4% to 76.9% in younger patients,” Dr. Staudt said.
ABC, along with GCB and unclassified, are among three key genetic classifications of DLBCL, which is the most common type of lymphoma. While previous studies have shown the Bruton kinase (BTK) inhibitor ibrutinib to induce very low responses among those with the GCB type, favorable responses are seen with the ABC type, of which MCD and N1 are genetic subtypes.
For the Phoenix trial, 838 previously untreated DLBCL patients of the ABC subtype were randomized to ibrutinib (560 mg per day, orally) or placebo plus R-CHOP, in a 21-day cycle for 6 or 8 cycles.
In the overall population, the study failed to achieve its primary survival endpoint of improved survival with ibrutinib. However, a subset analysis stratifying patients by age revealed significant event-free, progression-free, and overall survival benefits with ibrutinib among patients aged 60 and under, with manageable safety. Unexpectedly, this treatment was associated with a worsening of survival outcomes among patients over 60, due to toxicities.
In the new subanalysis, focusing on patients aged 60 and under, Dr. Staudt and his colleagues found that those with the MCD subtype of ABC DLBCL (n = 31) who were treated with ibrutinib had 3-year event-free survival and overall survival rates as high as 100% each, while these rates were significantly lower with R-CHOP alone (48%; P = .01, and 69.6%; P = .032, respectively).
Likewise, among younger patients with the N1 subtype (n = 13), the addition of ibrutinib was associated 3-year event-free and overall survival of 100%, while the R-CHOP alone patients had a significantly lower event-free- (50%; P = .0161) and overall survival (50%; P = .0134).
In the study in general, younger patients who were neither MCD nor N1 also showed better responses with ibrutinib versus placebo; however, the effects were not as strong as those with the MCD and N1 genetic subtypes.
Older patients over 60 showed no benefit from ibrutinib, regardless of their genetic subtype. And benefits were not observed in younger patients with BN2 DLBCL (n = 21), another ABC subtype.
The results are important – despite being secondary endpoints, Dr. Staudt emphasized.
“The automatic assumption regarding secondary endpoints is that any positive findings might have occurred by chance. In the present study, we show that this is not the case.”
“Rather, two previously defined genetic subtypes of DLBCL had an exceptional benefit from ibrutinib,” he said.
“Our study provides strong biological support for the view that the original Phoenix trial should be viewed as a positive trial for younger patients (under 60) with non-GCB DLBCL,” Dr. Staudt said.
While the responses to ibrutinib among younger ABC patients in general were not as robust as with the MCD and N1 subtypes, those improvements nevertheless suggest important benefit with the added treatment, he noted.
“Overall, MCD and N1 constitute roughly 10% of DLBCLs; however, our conclusion is that ibrutinib should be considered in younger patients with non-GCB DLBCL, which constitutes roughly 43% of all DLBCLs,” he said.
Dr. Staudt and other authors are inventors on NIH patent applications covering the LymphGen algorithm (a genetic predictor tool) and covering the use of BTK inhibitors in genetic subtypes of DLBCL. The Phoenix trial received support from Janssen Global Services.
, compared with R-CHOP alone, new research shows.
The findings, published Nov. 4, 2021, in Cancer Cell, come from a subanalysis of the phase 3 Phoenix trial. They show that patients with DLBCL aged 60 and younger with either the MCD or N1 genetic subtype had 3-year event-free survival rates as high as 100% when treated with ibrutinib plus R-CHOP, whereas with R-CHOP chemotherapy alone, the survival rates were approximately half of that rate.
“A 100% 3-year event-free survival is almost unheard-of in DLBCL and speaks to the intense dependency of these subtypes to constitutive B cell receptor signaling and their vulnerability to ibrutinib,” first author Louis M. Staudt, MD, of the Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Md., said in an interview.
“By contrast, in ABC DLBCL, the addition of ibrutinib to R-CHOP increased event-free survival by 12.4% to 76.9% in younger patients,” Dr. Staudt said.
ABC, along with GCB and unclassified, are among three key genetic classifications of DLBCL, which is the most common type of lymphoma. While previous studies have shown the Bruton kinase (BTK) inhibitor ibrutinib to induce very low responses among those with the GCB type, favorable responses are seen with the ABC type, of which MCD and N1 are genetic subtypes.
For the Phoenix trial, 838 previously untreated DLBCL patients of the ABC subtype were randomized to ibrutinib (560 mg per day, orally) or placebo plus R-CHOP, in a 21-day cycle for 6 or 8 cycles.
In the overall population, the study failed to achieve its primary survival endpoint of improved survival with ibrutinib. However, a subset analysis stratifying patients by age revealed significant event-free, progression-free, and overall survival benefits with ibrutinib among patients aged 60 and under, with manageable safety. Unexpectedly, this treatment was associated with a worsening of survival outcomes among patients over 60, due to toxicities.
In the new subanalysis, focusing on patients aged 60 and under, Dr. Staudt and his colleagues found that those with the MCD subtype of ABC DLBCL (n = 31) who were treated with ibrutinib had 3-year event-free survival and overall survival rates as high as 100% each, while these rates were significantly lower with R-CHOP alone (48%; P = .01, and 69.6%; P = .032, respectively).
Likewise, among younger patients with the N1 subtype (n = 13), the addition of ibrutinib was associated 3-year event-free and overall survival of 100%, while the R-CHOP alone patients had a significantly lower event-free- (50%; P = .0161) and overall survival (50%; P = .0134).
In the study in general, younger patients who were neither MCD nor N1 also showed better responses with ibrutinib versus placebo; however, the effects were not as strong as those with the MCD and N1 genetic subtypes.
Older patients over 60 showed no benefit from ibrutinib, regardless of their genetic subtype. And benefits were not observed in younger patients with BN2 DLBCL (n = 21), another ABC subtype.
The results are important – despite being secondary endpoints, Dr. Staudt emphasized.
“The automatic assumption regarding secondary endpoints is that any positive findings might have occurred by chance. In the present study, we show that this is not the case.”
“Rather, two previously defined genetic subtypes of DLBCL had an exceptional benefit from ibrutinib,” he said.
“Our study provides strong biological support for the view that the original Phoenix trial should be viewed as a positive trial for younger patients (under 60) with non-GCB DLBCL,” Dr. Staudt said.
While the responses to ibrutinib among younger ABC patients in general were not as robust as with the MCD and N1 subtypes, those improvements nevertheless suggest important benefit with the added treatment, he noted.
“Overall, MCD and N1 constitute roughly 10% of DLBCLs; however, our conclusion is that ibrutinib should be considered in younger patients with non-GCB DLBCL, which constitutes roughly 43% of all DLBCLs,” he said.
Dr. Staudt and other authors are inventors on NIH patent applications covering the LymphGen algorithm (a genetic predictor tool) and covering the use of BTK inhibitors in genetic subtypes of DLBCL. The Phoenix trial received support from Janssen Global Services.
, compared with R-CHOP alone, new research shows.
The findings, published Nov. 4, 2021, in Cancer Cell, come from a subanalysis of the phase 3 Phoenix trial. They show that patients with DLBCL aged 60 and younger with either the MCD or N1 genetic subtype had 3-year event-free survival rates as high as 100% when treated with ibrutinib plus R-CHOP, whereas with R-CHOP chemotherapy alone, the survival rates were approximately half of that rate.
“A 100% 3-year event-free survival is almost unheard-of in DLBCL and speaks to the intense dependency of these subtypes to constitutive B cell receptor signaling and their vulnerability to ibrutinib,” first author Louis M. Staudt, MD, of the Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Md., said in an interview.
“By contrast, in ABC DLBCL, the addition of ibrutinib to R-CHOP increased event-free survival by 12.4% to 76.9% in younger patients,” Dr. Staudt said.
ABC, along with GCB and unclassified, are among three key genetic classifications of DLBCL, which is the most common type of lymphoma. While previous studies have shown the Bruton kinase (BTK) inhibitor ibrutinib to induce very low responses among those with the GCB type, favorable responses are seen with the ABC type, of which MCD and N1 are genetic subtypes.
For the Phoenix trial, 838 previously untreated DLBCL patients of the ABC subtype were randomized to ibrutinib (560 mg per day, orally) or placebo plus R-CHOP, in a 21-day cycle for 6 or 8 cycles.
In the overall population, the study failed to achieve its primary survival endpoint of improved survival with ibrutinib. However, a subset analysis stratifying patients by age revealed significant event-free, progression-free, and overall survival benefits with ibrutinib among patients aged 60 and under, with manageable safety. Unexpectedly, this treatment was associated with a worsening of survival outcomes among patients over 60, due to toxicities.
In the new subanalysis, focusing on patients aged 60 and under, Dr. Staudt and his colleagues found that those with the MCD subtype of ABC DLBCL (n = 31) who were treated with ibrutinib had 3-year event-free survival and overall survival rates as high as 100% each, while these rates were significantly lower with R-CHOP alone (48%; P = .01, and 69.6%; P = .032, respectively).
Likewise, among younger patients with the N1 subtype (n = 13), the addition of ibrutinib was associated 3-year event-free and overall survival of 100%, while the R-CHOP alone patients had a significantly lower event-free- (50%; P = .0161) and overall survival (50%; P = .0134).
In the study in general, younger patients who were neither MCD nor N1 also showed better responses with ibrutinib versus placebo; however, the effects were not as strong as those with the MCD and N1 genetic subtypes.
Older patients over 60 showed no benefit from ibrutinib, regardless of their genetic subtype. And benefits were not observed in younger patients with BN2 DLBCL (n = 21), another ABC subtype.
The results are important – despite being secondary endpoints, Dr. Staudt emphasized.
“The automatic assumption regarding secondary endpoints is that any positive findings might have occurred by chance. In the present study, we show that this is not the case.”
“Rather, two previously defined genetic subtypes of DLBCL had an exceptional benefit from ibrutinib,” he said.
“Our study provides strong biological support for the view that the original Phoenix trial should be viewed as a positive trial for younger patients (under 60) with non-GCB DLBCL,” Dr. Staudt said.
While the responses to ibrutinib among younger ABC patients in general were not as robust as with the MCD and N1 subtypes, those improvements nevertheless suggest important benefit with the added treatment, he noted.
“Overall, MCD and N1 constitute roughly 10% of DLBCLs; however, our conclusion is that ibrutinib should be considered in younger patients with non-GCB DLBCL, which constitutes roughly 43% of all DLBCLs,” he said.
Dr. Staudt and other authors are inventors on NIH patent applications covering the LymphGen algorithm (a genetic predictor tool) and covering the use of BTK inhibitors in genetic subtypes of DLBCL. The Phoenix trial received support from Janssen Global Services.
FROM CANCER CELL
Easing access to DLBCL treatments: Patient study reveals racial differences
, but other “multifaceted and personalized” strategies are also needed, a new study shows.
The findings, from a survey focused on patients’ willingness to travel for treatment, offer valuable insights on DLBCL patients’ perspectives and care needs, and on racial and sociodemographic variations among their perspectives and needs, the investigators said.
Treatment decision factors
They used a choice-based conjoint analysis to assess the relative value that 302 patients with DLBCL place on clinical factors, continuity of care, and travel time. Patients were asked to select treatment plans, choosing between pairs of hypothetical options that varied in travel time, follow-up arrangement, oncologist continuity, 2-year overall survival, and intensive care unit admission rate, the authors explained.
When all follow-up care in the hypothetical scenario was provided at the treatment center, plans requiring travel time of longer than 30 minutes were less attractive, Zachary A. K. Frosch, MD, and colleagues reported in the Journal of Clinical Oncology.
Importance weights, when compared with 30-minute travel time, were –0.54, –0.57, and –0.17 for 60, 90, and 120 minute travel time, they found.
However, scenarios involving shared follow-up by the treatment center and patients’ local providers mitigated the negative impact of travel on treatment plan choice, they noted (importance weights, 0.63, 0.32, and 0.26 at 60, 90, and 120-minute travel times).
Importantly, an analysis of responses based on sociodemographic factors showed that Black participants were less likely to choose plans requiring longer travel, regardless of follow-up arrangement, the authors said.
“Black patients were also less likely than White patients to choose treatment plans that offered lower continuity with their current oncologist (importance weights, 2.50 to vs. 1.09, respectively),” they wrote.
Further, when making choices that required trade-offs, treatment efficacy was a weaker driver of treatment plan preferences for Black patient than for White patients (importance weights, 0.34 vs. 0.75 per 5% point increase in overall survival, respectively).
Why the findings matter
“Certain cancer treatments aren’t offered everywhere. Examples of this are the bone marrow transplants and [chimeric antigen receptor T-cell] therapies used to treat patients with blood cancers such as lymphoma,” Dr. Frosch said in an interview, adding that the limited geographic availability of these treatments means that patients who need them may have to travel farther and also to establish care with a new oncologist.
“These are both things that some patients may be reluctant to do,” added Dr. Frosch, who was with the Perelman School of Medicine at the University of Pennsylvania, Philadelphia, at the time of the study, but is now assistant professor at Fox Chase Cancer Center in Philadelphia.
“We wanted to better understand how patients think about these trade-offs,” he said. “We found that they were less likely to choose treatments requiring more travel, or treatments that required them to transfer care to a new oncologist. This was the case, even if it meant choosing a treatment that might be less effective against their cancer. But when patients were offered a chance to have half of their follow-up appointments locally, travel was less of a barrier.”
Importantly, not all participants valued each aspect of treatments equally, Dr. Frosch noted, referencing the responses of Black versus White patients.
He and his colleagues stressed that while collaborative follow-up may ease access to more distant treatments for some patients, the lesser willingness among Black participants to travel for cancer therapy – regardless of follow-up arrangement – means that attention must be paid to unintended consequences, to avoid worsening the existing disparities in access to cellular therapies.
These data represent a step toward better understanding of how patients considering whether or not to travel for specialized cancer care weigh trade-offs, he said.
“However, we need to dig deeper into the issues we uncovered in future research, he added. “Our findings suggest that collaborative follow-up between the hospitals that offer these treatments and the oncologists in patients’ own communities could improve access to specialized cancer treatments. But I also think it’s important to understand that this may not be the solution for everyone, and so multiple and individualized strategies are going to be needed.”
Personalized treatment strategies
The findings provide important perspective on the need to address patients’ concerns and circumstances to improve access to cellular therapies, said Ankit Kansagra, MD, the Eugene P. Frenkel, M.D. Scholar in Clinical Medicine at the University of Texas Southwestern Medical Center, Dallas.
The unique focus by Dr. Frosch and his associates on the patient perspective versus the health care system perspective underscores the need to be patient-focused, and serves as a reminder that different strategies are needed for different patients, Dr. Kansagra, who has also conducted research on access to CAR T therapies, said in an interview.
For some patients, a shared model of care is much more important than a 5% improvement in survival, he said, adding that providers shouldn’t assume that they understand a patient’s perspective.
Devising hybrid solutions that take community and individual needs into consideration would be preferable to seeking one national solution for care access, he added.
“It’s also pretty clear from this that it can be a shared model versus just an academic center or community center doing everything,” he said. “I think that’s going to be the next frontier – [determining] how we can hand over a patient, once CAR T is done, back to the community oncologist so he or she can continue following the patient and knows the survivorship plan – and keeping that model in place.”
Next steps
Further work is needed to determine the mechanisms driving the differences observed between Black and White patients in this study, the authors said, explaining that “[a]lthough the differences observed by race may reflect structural racism-driven access inequities, the relatively small subsample of Black patients and model complexity constraints limited our ability to analyze multiple factors.
“A prospective validation study to demonstrate the association of stated preferences with real-world decisions would further support our findings,” they wrote.
Dr. Frosch reported having no conflicts of interest. Dr. Kansagra is on advisory boards for Alnylam, Bristol Myers Squibb, Cota Healthcare, GSK, Janssen, Oncopeptides, and Takeda.
, but other “multifaceted and personalized” strategies are also needed, a new study shows.
The findings, from a survey focused on patients’ willingness to travel for treatment, offer valuable insights on DLBCL patients’ perspectives and care needs, and on racial and sociodemographic variations among their perspectives and needs, the investigators said.
Treatment decision factors
They used a choice-based conjoint analysis to assess the relative value that 302 patients with DLBCL place on clinical factors, continuity of care, and travel time. Patients were asked to select treatment plans, choosing between pairs of hypothetical options that varied in travel time, follow-up arrangement, oncologist continuity, 2-year overall survival, and intensive care unit admission rate, the authors explained.
When all follow-up care in the hypothetical scenario was provided at the treatment center, plans requiring travel time of longer than 30 minutes were less attractive, Zachary A. K. Frosch, MD, and colleagues reported in the Journal of Clinical Oncology.
Importance weights, when compared with 30-minute travel time, were –0.54, –0.57, and –0.17 for 60, 90, and 120 minute travel time, they found.
However, scenarios involving shared follow-up by the treatment center and patients’ local providers mitigated the negative impact of travel on treatment plan choice, they noted (importance weights, 0.63, 0.32, and 0.26 at 60, 90, and 120-minute travel times).
Importantly, an analysis of responses based on sociodemographic factors showed that Black participants were less likely to choose plans requiring longer travel, regardless of follow-up arrangement, the authors said.
“Black patients were also less likely than White patients to choose treatment plans that offered lower continuity with their current oncologist (importance weights, 2.50 to vs. 1.09, respectively),” they wrote.
Further, when making choices that required trade-offs, treatment efficacy was a weaker driver of treatment plan preferences for Black patient than for White patients (importance weights, 0.34 vs. 0.75 per 5% point increase in overall survival, respectively).
Why the findings matter
“Certain cancer treatments aren’t offered everywhere. Examples of this are the bone marrow transplants and [chimeric antigen receptor T-cell] therapies used to treat patients with blood cancers such as lymphoma,” Dr. Frosch said in an interview, adding that the limited geographic availability of these treatments means that patients who need them may have to travel farther and also to establish care with a new oncologist.
“These are both things that some patients may be reluctant to do,” added Dr. Frosch, who was with the Perelman School of Medicine at the University of Pennsylvania, Philadelphia, at the time of the study, but is now assistant professor at Fox Chase Cancer Center in Philadelphia.
“We wanted to better understand how patients think about these trade-offs,” he said. “We found that they were less likely to choose treatments requiring more travel, or treatments that required them to transfer care to a new oncologist. This was the case, even if it meant choosing a treatment that might be less effective against their cancer. But when patients were offered a chance to have half of their follow-up appointments locally, travel was less of a barrier.”
Importantly, not all participants valued each aspect of treatments equally, Dr. Frosch noted, referencing the responses of Black versus White patients.
He and his colleagues stressed that while collaborative follow-up may ease access to more distant treatments for some patients, the lesser willingness among Black participants to travel for cancer therapy – regardless of follow-up arrangement – means that attention must be paid to unintended consequences, to avoid worsening the existing disparities in access to cellular therapies.
These data represent a step toward better understanding of how patients considering whether or not to travel for specialized cancer care weigh trade-offs, he said.
“However, we need to dig deeper into the issues we uncovered in future research, he added. “Our findings suggest that collaborative follow-up between the hospitals that offer these treatments and the oncologists in patients’ own communities could improve access to specialized cancer treatments. But I also think it’s important to understand that this may not be the solution for everyone, and so multiple and individualized strategies are going to be needed.”
Personalized treatment strategies
The findings provide important perspective on the need to address patients’ concerns and circumstances to improve access to cellular therapies, said Ankit Kansagra, MD, the Eugene P. Frenkel, M.D. Scholar in Clinical Medicine at the University of Texas Southwestern Medical Center, Dallas.
The unique focus by Dr. Frosch and his associates on the patient perspective versus the health care system perspective underscores the need to be patient-focused, and serves as a reminder that different strategies are needed for different patients, Dr. Kansagra, who has also conducted research on access to CAR T therapies, said in an interview.
For some patients, a shared model of care is much more important than a 5% improvement in survival, he said, adding that providers shouldn’t assume that they understand a patient’s perspective.
Devising hybrid solutions that take community and individual needs into consideration would be preferable to seeking one national solution for care access, he added.
“It’s also pretty clear from this that it can be a shared model versus just an academic center or community center doing everything,” he said. “I think that’s going to be the next frontier – [determining] how we can hand over a patient, once CAR T is done, back to the community oncologist so he or she can continue following the patient and knows the survivorship plan – and keeping that model in place.”
Next steps
Further work is needed to determine the mechanisms driving the differences observed between Black and White patients in this study, the authors said, explaining that “[a]lthough the differences observed by race may reflect structural racism-driven access inequities, the relatively small subsample of Black patients and model complexity constraints limited our ability to analyze multiple factors.
“A prospective validation study to demonstrate the association of stated preferences with real-world decisions would further support our findings,” they wrote.
Dr. Frosch reported having no conflicts of interest. Dr. Kansagra is on advisory boards for Alnylam, Bristol Myers Squibb, Cota Healthcare, GSK, Janssen, Oncopeptides, and Takeda.
, but other “multifaceted and personalized” strategies are also needed, a new study shows.
The findings, from a survey focused on patients’ willingness to travel for treatment, offer valuable insights on DLBCL patients’ perspectives and care needs, and on racial and sociodemographic variations among their perspectives and needs, the investigators said.
Treatment decision factors
They used a choice-based conjoint analysis to assess the relative value that 302 patients with DLBCL place on clinical factors, continuity of care, and travel time. Patients were asked to select treatment plans, choosing between pairs of hypothetical options that varied in travel time, follow-up arrangement, oncologist continuity, 2-year overall survival, and intensive care unit admission rate, the authors explained.
When all follow-up care in the hypothetical scenario was provided at the treatment center, plans requiring travel time of longer than 30 minutes were less attractive, Zachary A. K. Frosch, MD, and colleagues reported in the Journal of Clinical Oncology.
Importance weights, when compared with 30-minute travel time, were –0.54, –0.57, and –0.17 for 60, 90, and 120 minute travel time, they found.
However, scenarios involving shared follow-up by the treatment center and patients’ local providers mitigated the negative impact of travel on treatment plan choice, they noted (importance weights, 0.63, 0.32, and 0.26 at 60, 90, and 120-minute travel times).
Importantly, an analysis of responses based on sociodemographic factors showed that Black participants were less likely to choose plans requiring longer travel, regardless of follow-up arrangement, the authors said.
“Black patients were also less likely than White patients to choose treatment plans that offered lower continuity with their current oncologist (importance weights, 2.50 to vs. 1.09, respectively),” they wrote.
Further, when making choices that required trade-offs, treatment efficacy was a weaker driver of treatment plan preferences for Black patient than for White patients (importance weights, 0.34 vs. 0.75 per 5% point increase in overall survival, respectively).
Why the findings matter
“Certain cancer treatments aren’t offered everywhere. Examples of this are the bone marrow transplants and [chimeric antigen receptor T-cell] therapies used to treat patients with blood cancers such as lymphoma,” Dr. Frosch said in an interview, adding that the limited geographic availability of these treatments means that patients who need them may have to travel farther and also to establish care with a new oncologist.
“These are both things that some patients may be reluctant to do,” added Dr. Frosch, who was with the Perelman School of Medicine at the University of Pennsylvania, Philadelphia, at the time of the study, but is now assistant professor at Fox Chase Cancer Center in Philadelphia.
“We wanted to better understand how patients think about these trade-offs,” he said. “We found that they were less likely to choose treatments requiring more travel, or treatments that required them to transfer care to a new oncologist. This was the case, even if it meant choosing a treatment that might be less effective against their cancer. But when patients were offered a chance to have half of their follow-up appointments locally, travel was less of a barrier.”
Importantly, not all participants valued each aspect of treatments equally, Dr. Frosch noted, referencing the responses of Black versus White patients.
He and his colleagues stressed that while collaborative follow-up may ease access to more distant treatments for some patients, the lesser willingness among Black participants to travel for cancer therapy – regardless of follow-up arrangement – means that attention must be paid to unintended consequences, to avoid worsening the existing disparities in access to cellular therapies.
These data represent a step toward better understanding of how patients considering whether or not to travel for specialized cancer care weigh trade-offs, he said.
“However, we need to dig deeper into the issues we uncovered in future research, he added. “Our findings suggest that collaborative follow-up between the hospitals that offer these treatments and the oncologists in patients’ own communities could improve access to specialized cancer treatments. But I also think it’s important to understand that this may not be the solution for everyone, and so multiple and individualized strategies are going to be needed.”
Personalized treatment strategies
The findings provide important perspective on the need to address patients’ concerns and circumstances to improve access to cellular therapies, said Ankit Kansagra, MD, the Eugene P. Frenkel, M.D. Scholar in Clinical Medicine at the University of Texas Southwestern Medical Center, Dallas.
The unique focus by Dr. Frosch and his associates on the patient perspective versus the health care system perspective underscores the need to be patient-focused, and serves as a reminder that different strategies are needed for different patients, Dr. Kansagra, who has also conducted research on access to CAR T therapies, said in an interview.
For some patients, a shared model of care is much more important than a 5% improvement in survival, he said, adding that providers shouldn’t assume that they understand a patient’s perspective.
Devising hybrid solutions that take community and individual needs into consideration would be preferable to seeking one national solution for care access, he added.
“It’s also pretty clear from this that it can be a shared model versus just an academic center or community center doing everything,” he said. “I think that’s going to be the next frontier – [determining] how we can hand over a patient, once CAR T is done, back to the community oncologist so he or she can continue following the patient and knows the survivorship plan – and keeping that model in place.”
Next steps
Further work is needed to determine the mechanisms driving the differences observed between Black and White patients in this study, the authors said, explaining that “[a]lthough the differences observed by race may reflect structural racism-driven access inequities, the relatively small subsample of Black patients and model complexity constraints limited our ability to analyze multiple factors.
“A prospective validation study to demonstrate the association of stated preferences with real-world decisions would further support our findings,” they wrote.
Dr. Frosch reported having no conflicts of interest. Dr. Kansagra is on advisory boards for Alnylam, Bristol Myers Squibb, Cota Healthcare, GSK, Janssen, Oncopeptides, and Takeda.
FROM JCO
New trials in lymphoma and MM: Could your patient benefit?
A number of late-phase clinical trials in lymphoma and multiple myeloma (MM) have opened in recent months. Maybe one of your patients could benefit from being enrolled?
Untreated peripheral T-cell lymphoma
Adult patients with peripheral T-cell lymphoma who have received no therapy except corticosteroids are invited to join a phase 2 study testing duvelisib (Copiktra) added to usual chemotherapy. Duvelisib is currently used in relapsed/refractory patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) or follicular lymphoma; this study explores first-line use in a different type of lymphoma, so it may be a potential new indication for the drug. All participants will receive a 5-month chemotherapy regimen of cyclophosphamide, doxorubicin (Adriamycin, Rubex), vincristine (Oncovin), prednisone, and etoposide (VePesid). One group will also take oral azacitidine (Vidaza) while the third (experimental) group has oral duvelisib. The primary outcome is complete remission rate; overall survival (OS) is a secondary outcome. Quality of life (QoL) is not measured apart from mood and fatigue. The study opened at Memorial Sloan Kettering Cancer Center on July 30 for up to 170 participants.
Untreated CLL/SLL
Patients with CLL/SLL, no 17p deletions, and no prior systemic therapy can join a phase 3 study of pirtobrutinib, an investigational oral tyrosine-kinase inhibitor. Pirtobrutinib targets Bruton's tyrosine kinase, an intracellular signaler that is crucial to the proliferation and survival of leukemic cells. The trial will involve treatment for up to 5 years, with either oral pirtobrutinib or a standard combination of intravenous bendamustine (Treakisym, Treanda, Ribomustin) and rituximab (Ruxience, Riabni, Truxima, Rituxan, MabThera). Investigators at the study site, the California Research Institute in Los Angeles, started recruiting on Sept. 23 hoping for 250 participants. Progression-free survival is the primary outcome, OS is a secondary measure, and QoL will not be tracked.
Relapsed or refractory follicular lymphoma after one line of therapy
Adult patients who have CD20-positive follicular lymphoma (grades 1-3A) who have received at least one prior systemic lymphoma therapy can join a phase 3 trial of investigational drug mosunetuzumab combined with lenalidomide (Revlimid, Linamide). Participants in the mosunetuzumab group will be treated with the drug combo for approximately 1 year then followed for 8 years. People in the comparator group will receive a rituximab-lenalidomide combination instead. The trial planned to start enrolling on Oct. 31, looking for a total of 400 people in 144 study locations worldwide, including in nine U.S. states. The primary outcome is progression-free survival. OS is a secondary outcome and, apart from fatigue, QoL parameters will not be assessed.
Relapsed or refractory follicular lymphoma after two lines of therapy
Adults with follicular lymphoma (grades 1-3A) despite two or more treatment regimens, including at least one anti-CD20 therapy, are eligible for a phase 2 study of loncastuximab tesirine (Zynlonta). The drug already has an FDA accelerated approval this year for a different lymphoma, relapsed/refractory large B-cell lymphoma, so this could be a new indication. In this trial, it will be compared with idelalisib (Zydelig), which is already approved for follicular lymphoma. Participants will get either an infusion of loncastuximab every 3 weeks or a twice-daily tablet of idelalisib for up to 30 months. Investigators started recruiting on Oct. 30 and hope for 150 participants in Nevada and New Jersey. Complete response rate is the primary outcome. OS and QoL are secondary outcome measures.
Untreated multiple myeloma not eligible for autologous stem-cell transplant (ASCT)
Adults with untreated multiple myeloma who are not eligible for stem-cell transplantation are sought for a phase 2 study testing the performance of selinexor (Xpovio) plus dexamethasone. (Prior treatment with emergency steroids and radiation therapy is allowed.) Selinexor plus dexamethasone was approved in 2019 for multiple myeloma after four prior therapies; the goal of this study is to assess its performance as frontline treatment. Participants will receive oral selinexor and dexamethasone for up to 3 years in addition to subcutaneous daratumumab (Darzalex) and capsules of lenalidomide. The study opened Sept. 10, aiming for 100 participants at sites in Arizona, Colorado, Maryland, New York, Oregon, Texas, and Virginia. OS is a secondary outcome measure; QoL will not be assessed.
Newly diagnosed multiple myeloma where ASCT not planned
Patients with newly diagnosed multiple myeloma who are not having ASCT as initial therapy are eligible for a phase 3 study of the investigational CAR T-cell therapy ciltacabtagene autoleucel (cilta-cel). This product targets B-cell maturation antigen (BCMA), which is expressed on the surface of mature B lymphocytes and malignant plasma cells; it is in late-stage clinical trials for multiple myeloma but has not yet been approved. In this study, the control-group participants will receive standard therapy for up to approximately 4 years - a regimen of bortezomib (Velcade), lenalidomide, and dexamethasone. Patients destined for cilta-cel will undergo apheresis to garner their T cells, which will then be genetically engineered to express the synthetic antigen receptor, duplicated, and re-infused. During the 6-month wait between apheresis and the cilta-cel infusion, the CAR T patients will receive similar treatment to the control group. Recruitment started for 650 patients across 12 U.S. states and 24 countries on August 19. The primary outcome is progression-free survival. OS and QoL are secondary measures and will be tracked for approximately 12 years.
All trial information is from the National Institutes of Health U.S. National Library of Medicine.
A version of this article first appeared on Medscape.com
A number of late-phase clinical trials in lymphoma and multiple myeloma (MM) have opened in recent months. Maybe one of your patients could benefit from being enrolled?
Untreated peripheral T-cell lymphoma
Adult patients with peripheral T-cell lymphoma who have received no therapy except corticosteroids are invited to join a phase 2 study testing duvelisib (Copiktra) added to usual chemotherapy. Duvelisib is currently used in relapsed/refractory patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) or follicular lymphoma; this study explores first-line use in a different type of lymphoma, so it may be a potential new indication for the drug. All participants will receive a 5-month chemotherapy regimen of cyclophosphamide, doxorubicin (Adriamycin, Rubex), vincristine (Oncovin), prednisone, and etoposide (VePesid). One group will also take oral azacitidine (Vidaza) while the third (experimental) group has oral duvelisib. The primary outcome is complete remission rate; overall survival (OS) is a secondary outcome. Quality of life (QoL) is not measured apart from mood and fatigue. The study opened at Memorial Sloan Kettering Cancer Center on July 30 for up to 170 participants.
Untreated CLL/SLL
Patients with CLL/SLL, no 17p deletions, and no prior systemic therapy can join a phase 3 study of pirtobrutinib, an investigational oral tyrosine-kinase inhibitor. Pirtobrutinib targets Bruton's tyrosine kinase, an intracellular signaler that is crucial to the proliferation and survival of leukemic cells. The trial will involve treatment for up to 5 years, with either oral pirtobrutinib or a standard combination of intravenous bendamustine (Treakisym, Treanda, Ribomustin) and rituximab (Ruxience, Riabni, Truxima, Rituxan, MabThera). Investigators at the study site, the California Research Institute in Los Angeles, started recruiting on Sept. 23 hoping for 250 participants. Progression-free survival is the primary outcome, OS is a secondary measure, and QoL will not be tracked.
Relapsed or refractory follicular lymphoma after one line of therapy
Adult patients who have CD20-positive follicular lymphoma (grades 1-3A) who have received at least one prior systemic lymphoma therapy can join a phase 3 trial of investigational drug mosunetuzumab combined with lenalidomide (Revlimid, Linamide). Participants in the mosunetuzumab group will be treated with the drug combo for approximately 1 year then followed for 8 years. People in the comparator group will receive a rituximab-lenalidomide combination instead. The trial planned to start enrolling on Oct. 31, looking for a total of 400 people in 144 study locations worldwide, including in nine U.S. states. The primary outcome is progression-free survival. OS is a secondary outcome and, apart from fatigue, QoL parameters will not be assessed.
Relapsed or refractory follicular lymphoma after two lines of therapy
Adults with follicular lymphoma (grades 1-3A) despite two or more treatment regimens, including at least one anti-CD20 therapy, are eligible for a phase 2 study of loncastuximab tesirine (Zynlonta). The drug already has an FDA accelerated approval this year for a different lymphoma, relapsed/refractory large B-cell lymphoma, so this could be a new indication. In this trial, it will be compared with idelalisib (Zydelig), which is already approved for follicular lymphoma. Participants will get either an infusion of loncastuximab every 3 weeks or a twice-daily tablet of idelalisib for up to 30 months. Investigators started recruiting on Oct. 30 and hope for 150 participants in Nevada and New Jersey. Complete response rate is the primary outcome. OS and QoL are secondary outcome measures.
Untreated multiple myeloma not eligible for autologous stem-cell transplant (ASCT)
Adults with untreated multiple myeloma who are not eligible for stem-cell transplantation are sought for a phase 2 study testing the performance of selinexor (Xpovio) plus dexamethasone. (Prior treatment with emergency steroids and radiation therapy is allowed.) Selinexor plus dexamethasone was approved in 2019 for multiple myeloma after four prior therapies; the goal of this study is to assess its performance as frontline treatment. Participants will receive oral selinexor and dexamethasone for up to 3 years in addition to subcutaneous daratumumab (Darzalex) and capsules of lenalidomide. The study opened Sept. 10, aiming for 100 participants at sites in Arizona, Colorado, Maryland, New York, Oregon, Texas, and Virginia. OS is a secondary outcome measure; QoL will not be assessed.
Newly diagnosed multiple myeloma where ASCT not planned
Patients with newly diagnosed multiple myeloma who are not having ASCT as initial therapy are eligible for a phase 3 study of the investigational CAR T-cell therapy ciltacabtagene autoleucel (cilta-cel). This product targets B-cell maturation antigen (BCMA), which is expressed on the surface of mature B lymphocytes and malignant plasma cells; it is in late-stage clinical trials for multiple myeloma but has not yet been approved. In this study, the control-group participants will receive standard therapy for up to approximately 4 years - a regimen of bortezomib (Velcade), lenalidomide, and dexamethasone. Patients destined for cilta-cel will undergo apheresis to garner their T cells, which will then be genetically engineered to express the synthetic antigen receptor, duplicated, and re-infused. During the 6-month wait between apheresis and the cilta-cel infusion, the CAR T patients will receive similar treatment to the control group. Recruitment started for 650 patients across 12 U.S. states and 24 countries on August 19. The primary outcome is progression-free survival. OS and QoL are secondary measures and will be tracked for approximately 12 years.
All trial information is from the National Institutes of Health U.S. National Library of Medicine.
A version of this article first appeared on Medscape.com
A number of late-phase clinical trials in lymphoma and multiple myeloma (MM) have opened in recent months. Maybe one of your patients could benefit from being enrolled?
Untreated peripheral T-cell lymphoma
Adult patients with peripheral T-cell lymphoma who have received no therapy except corticosteroids are invited to join a phase 2 study testing duvelisib (Copiktra) added to usual chemotherapy. Duvelisib is currently used in relapsed/refractory patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) or follicular lymphoma; this study explores first-line use in a different type of lymphoma, so it may be a potential new indication for the drug. All participants will receive a 5-month chemotherapy regimen of cyclophosphamide, doxorubicin (Adriamycin, Rubex), vincristine (Oncovin), prednisone, and etoposide (VePesid). One group will also take oral azacitidine (Vidaza) while the third (experimental) group has oral duvelisib. The primary outcome is complete remission rate; overall survival (OS) is a secondary outcome. Quality of life (QoL) is not measured apart from mood and fatigue. The study opened at Memorial Sloan Kettering Cancer Center on July 30 for up to 170 participants.
Untreated CLL/SLL
Patients with CLL/SLL, no 17p deletions, and no prior systemic therapy can join a phase 3 study of pirtobrutinib, an investigational oral tyrosine-kinase inhibitor. Pirtobrutinib targets Bruton's tyrosine kinase, an intracellular signaler that is crucial to the proliferation and survival of leukemic cells. The trial will involve treatment for up to 5 years, with either oral pirtobrutinib or a standard combination of intravenous bendamustine (Treakisym, Treanda, Ribomustin) and rituximab (Ruxience, Riabni, Truxima, Rituxan, MabThera). Investigators at the study site, the California Research Institute in Los Angeles, started recruiting on Sept. 23 hoping for 250 participants. Progression-free survival is the primary outcome, OS is a secondary measure, and QoL will not be tracked.
Relapsed or refractory follicular lymphoma after one line of therapy
Adult patients who have CD20-positive follicular lymphoma (grades 1-3A) who have received at least one prior systemic lymphoma therapy can join a phase 3 trial of investigational drug mosunetuzumab combined with lenalidomide (Revlimid, Linamide). Participants in the mosunetuzumab group will be treated with the drug combo for approximately 1 year then followed for 8 years. People in the comparator group will receive a rituximab-lenalidomide combination instead. The trial planned to start enrolling on Oct. 31, looking for a total of 400 people in 144 study locations worldwide, including in nine U.S. states. The primary outcome is progression-free survival. OS is a secondary outcome and, apart from fatigue, QoL parameters will not be assessed.
Relapsed or refractory follicular lymphoma after two lines of therapy
Adults with follicular lymphoma (grades 1-3A) despite two or more treatment regimens, including at least one anti-CD20 therapy, are eligible for a phase 2 study of loncastuximab tesirine (Zynlonta). The drug already has an FDA accelerated approval this year for a different lymphoma, relapsed/refractory large B-cell lymphoma, so this could be a new indication. In this trial, it will be compared with idelalisib (Zydelig), which is already approved for follicular lymphoma. Participants will get either an infusion of loncastuximab every 3 weeks or a twice-daily tablet of idelalisib for up to 30 months. Investigators started recruiting on Oct. 30 and hope for 150 participants in Nevada and New Jersey. Complete response rate is the primary outcome. OS and QoL are secondary outcome measures.
Untreated multiple myeloma not eligible for autologous stem-cell transplant (ASCT)
Adults with untreated multiple myeloma who are not eligible for stem-cell transplantation are sought for a phase 2 study testing the performance of selinexor (Xpovio) plus dexamethasone. (Prior treatment with emergency steroids and radiation therapy is allowed.) Selinexor plus dexamethasone was approved in 2019 for multiple myeloma after four prior therapies; the goal of this study is to assess its performance as frontline treatment. Participants will receive oral selinexor and dexamethasone for up to 3 years in addition to subcutaneous daratumumab (Darzalex) and capsules of lenalidomide. The study opened Sept. 10, aiming for 100 participants at sites in Arizona, Colorado, Maryland, New York, Oregon, Texas, and Virginia. OS is a secondary outcome measure; QoL will not be assessed.
Newly diagnosed multiple myeloma where ASCT not planned
Patients with newly diagnosed multiple myeloma who are not having ASCT as initial therapy are eligible for a phase 3 study of the investigational CAR T-cell therapy ciltacabtagene autoleucel (cilta-cel). This product targets B-cell maturation antigen (BCMA), which is expressed on the surface of mature B lymphocytes and malignant plasma cells; it is in late-stage clinical trials for multiple myeloma but has not yet been approved. In this study, the control-group participants will receive standard therapy for up to approximately 4 years - a regimen of bortezomib (Velcade), lenalidomide, and dexamethasone. Patients destined for cilta-cel will undergo apheresis to garner their T cells, which will then be genetically engineered to express the synthetic antigen receptor, duplicated, and re-infused. During the 6-month wait between apheresis and the cilta-cel infusion, the CAR T patients will receive similar treatment to the control group. Recruitment started for 650 patients across 12 U.S. states and 24 countries on August 19. The primary outcome is progression-free survival. OS and QoL are secondary measures and will be tracked for approximately 12 years.
All trial information is from the National Institutes of Health U.S. National Library of Medicine.
A version of this article first appeared on Medscape.com
On improving DLBCL outcomes, single-agent regimens fall short
, a review of the relevant literature suggests.
“In addition ... single-agent regimens are most likely not efficient enough to substantially improve the outcome of patients with DLBCL,” Wendan Xu and colleagues at University Hospital Munster, Germany, concluded, based on their review.
Indeed, novel combinations that include B-cell receptor (BCR) signaling and phosphatidylinositol 3-kinase (PI3K) inhibitors are needed for DLBCL treatment, and treatment should also include conventional chemoimmunotherapeutic regimens as well as other targeted agents and novel immunologic approaches, they wrote. Such novel combinations could overcome mechanisms of resistance and increase cure rates in individuals with DLBCL, they contended.
The authors’ observations are based on a search of the available data, from which they summarized the “current understanding of BCR signaling with a special focus on the PI3K pathway and its role in the pathogenesis of DLBCL.”
The addition of the anti-CD20 antibody rituximab to the CHOP regimen (cyclophosphamide, doxorubicin, vincristine, and prednisone) significantly improved outcomes for patients with DLBCL, but about a third of patients are not cured by the rituximab-CHOP (R-CHOP) regimen and subsequent therapies, they said, explaining their rationale for the review.
“A better understanding of the molecular pathogenesis is warranted to use novel targeted agents in an optimal manner,” they said.
The authors also addressed clinical implications of the findings, and mechanisms of resistance to PI3k inhibitors. For example, they noted that:
–Bruton’s tyrosine kinase (BTK) inhibitors may be beneficial when added to R-CHOP.
In the randomized phase 3 PHOENIX trial, ibrutinib plus R-CHOP versus R-CHOP alone in patients with non–germinal center B-cell (non-GCB) DLBCL showed a survival benefit in patients over 60 years of age, which suggests a possible role for “an intensified R-CHOP regimen that includes a BTK inhibitor” in these patients, they said. They added that confirmatory trials are under way, including the ESCALADE trial looking at the second-generation BTK inhibitor acalabrutinib combined with R-CHOP versus R-CHOP alone in patients with untreated DLBCL.
–Results have been mixed with PI3K inhibitors.
Various PI3K inhibitors have been evaluated for the treatment of patients with DLBCL.
Idelalisib, a first-in-class PI3K-specific inhibitor approved for treatment of relapsed/refractory (r/r) follicular lymphoma, small lymphocytic lymphoma, and chronic lymphocytic leukemia (CLL), showed only modest activity in preclinical DLBCL models, and no responses were detectable in a small trial of patients with r/r DLBCL, the authors said. “Severe toxic side effects and treatment-related deaths occurred in several clinical trials that tested idelalisib in combination with antibodies alone or with antibodies and chemotherapy, leading to the premature discontinuation of some of these studies,” they noted.
Other studies investigating idelalisib plus lenalidomide and rituximab or the spleen tyrosine kinase (SYK) inhibitor entospletinib in patients with r/r CLL or lymphoma were also halted because of “overwhelming, immune-mediated pulmonary and/or hepatic toxicities.”
Copanlisib, an intravenous pan-class I PI3K inhibitor with preferential inhibition of PI3Ka and PI3Kd, showed some promise as monotherapy in a phase 2 trial of patients with r/r DLBCL. The overall response rate was about 20%, and response was “numerically higher” in activated B-cell like (ABC) DLBCL, compared with GCB DLBCL (32% vs. 13%), confirming preclinical data that showed PI3Ka/d inhibition effectiveness mainly in ABC DLBCL.
“Compared with idelalisib, copanlisib appears to have a more favorable toxicity profile, with a lower incidence of severe complications,” they said, adding that a phase 2 trial of copanlisib plus R-CHOP as first-line therapy for patients with DLBCL is under way.
Further, monotherapy with buparlisib, a pan-class I PI3K inhibitor, was associated with a low response rate of 11.5% in a DLBCL subcohort in a phase 2 study, whereas parsaclisib, a next-generation inhibitor with specificity to the PI3Kd isoform, showed efficacy as a monotherapy in patients with r/r DLBCL in a phase 2 study (overall response rate, 25.5%), they said, adding that other PI3K inhibitors with additional inhibitory effects are under clinical development.
–Various molecular mechanisms of resistance to PI3K inhibitors have been described preclinically and clinically.
In an unbiased exploratory analysis of samples from patients treated with copanlisib, a 16-gene mutation signature that separated responders from nonresponders was identified, the authors said.
The finding suggests that genetic aberrations dictate response to PI3K inhibitors, they noted.
“This 16-gene signature included TNFAIP3, CREBBP, and PRDM1, which are known to be important in the molecular pathogenesis of DLBCL,” they wrote. A composite score was developed to reflect the numerical presence or absence of mutations in the gene set, they explained, adding that patients with a high composite score had a significantly higher overall response rate and longer progression-free survival than did patients with a lower score.
In addition, idelalisib treatment resulted in a feedback activation of PI3Ka in ABC DLBCL cells.
“This rebound of PI3K activity was overcome by subsequent PI3Ka inhibition in preclinical DLBCL models, further underscoring the necessity of inhibiting both PI3Ka and PI3Kd to achieve responses in ABC DLBCL,” they wrote, adding that “[i]n ABC DLBCL models treated with the PI3Ka/PI3Kd inhibitor AZD8835, activated CARD11 mutations were identified as a mechanism of resistance.”
Investigations looking at various treatment combinations to overcome resistance to PI3K inhibition and improve the efficacy of targeted approaches are under way, they said.
For example, copanlisib plus the BCL-2 inhibitor venetoclax showed “synergistic activity in BCR-dependent DLBCLs, with genetic bases for BCL-2 dysregulation in vitro and in vivo,” and combination treatment with umbralisib and the proteasome inhibitor carfilzomib showed synergistic cytotoxicity in B-cell lymphoma, they said, noting that the latter combination is currently being evaluated in patients with DLBCL.
This work was supported by a research grant from the Deutsche Krebshilfe. Dr. Xu reported having no financial disclosures.
, a review of the relevant literature suggests.
“In addition ... single-agent regimens are most likely not efficient enough to substantially improve the outcome of patients with DLBCL,” Wendan Xu and colleagues at University Hospital Munster, Germany, concluded, based on their review.
Indeed, novel combinations that include B-cell receptor (BCR) signaling and phosphatidylinositol 3-kinase (PI3K) inhibitors are needed for DLBCL treatment, and treatment should also include conventional chemoimmunotherapeutic regimens as well as other targeted agents and novel immunologic approaches, they wrote. Such novel combinations could overcome mechanisms of resistance and increase cure rates in individuals with DLBCL, they contended.
The authors’ observations are based on a search of the available data, from which they summarized the “current understanding of BCR signaling with a special focus on the PI3K pathway and its role in the pathogenesis of DLBCL.”
The addition of the anti-CD20 antibody rituximab to the CHOP regimen (cyclophosphamide, doxorubicin, vincristine, and prednisone) significantly improved outcomes for patients with DLBCL, but about a third of patients are not cured by the rituximab-CHOP (R-CHOP) regimen and subsequent therapies, they said, explaining their rationale for the review.
“A better understanding of the molecular pathogenesis is warranted to use novel targeted agents in an optimal manner,” they said.
The authors also addressed clinical implications of the findings, and mechanisms of resistance to PI3k inhibitors. For example, they noted that:
–Bruton’s tyrosine kinase (BTK) inhibitors may be beneficial when added to R-CHOP.
In the randomized phase 3 PHOENIX trial, ibrutinib plus R-CHOP versus R-CHOP alone in patients with non–germinal center B-cell (non-GCB) DLBCL showed a survival benefit in patients over 60 years of age, which suggests a possible role for “an intensified R-CHOP regimen that includes a BTK inhibitor” in these patients, they said. They added that confirmatory trials are under way, including the ESCALADE trial looking at the second-generation BTK inhibitor acalabrutinib combined with R-CHOP versus R-CHOP alone in patients with untreated DLBCL.
–Results have been mixed with PI3K inhibitors.
Various PI3K inhibitors have been evaluated for the treatment of patients with DLBCL.
Idelalisib, a first-in-class PI3K-specific inhibitor approved for treatment of relapsed/refractory (r/r) follicular lymphoma, small lymphocytic lymphoma, and chronic lymphocytic leukemia (CLL), showed only modest activity in preclinical DLBCL models, and no responses were detectable in a small trial of patients with r/r DLBCL, the authors said. “Severe toxic side effects and treatment-related deaths occurred in several clinical trials that tested idelalisib in combination with antibodies alone or with antibodies and chemotherapy, leading to the premature discontinuation of some of these studies,” they noted.
Other studies investigating idelalisib plus lenalidomide and rituximab or the spleen tyrosine kinase (SYK) inhibitor entospletinib in patients with r/r CLL or lymphoma were also halted because of “overwhelming, immune-mediated pulmonary and/or hepatic toxicities.”
Copanlisib, an intravenous pan-class I PI3K inhibitor with preferential inhibition of PI3Ka and PI3Kd, showed some promise as monotherapy in a phase 2 trial of patients with r/r DLBCL. The overall response rate was about 20%, and response was “numerically higher” in activated B-cell like (ABC) DLBCL, compared with GCB DLBCL (32% vs. 13%), confirming preclinical data that showed PI3Ka/d inhibition effectiveness mainly in ABC DLBCL.
“Compared with idelalisib, copanlisib appears to have a more favorable toxicity profile, with a lower incidence of severe complications,” they said, adding that a phase 2 trial of copanlisib plus R-CHOP as first-line therapy for patients with DLBCL is under way.
Further, monotherapy with buparlisib, a pan-class I PI3K inhibitor, was associated with a low response rate of 11.5% in a DLBCL subcohort in a phase 2 study, whereas parsaclisib, a next-generation inhibitor with specificity to the PI3Kd isoform, showed efficacy as a monotherapy in patients with r/r DLBCL in a phase 2 study (overall response rate, 25.5%), they said, adding that other PI3K inhibitors with additional inhibitory effects are under clinical development.
–Various molecular mechanisms of resistance to PI3K inhibitors have been described preclinically and clinically.
In an unbiased exploratory analysis of samples from patients treated with copanlisib, a 16-gene mutation signature that separated responders from nonresponders was identified, the authors said.
The finding suggests that genetic aberrations dictate response to PI3K inhibitors, they noted.
“This 16-gene signature included TNFAIP3, CREBBP, and PRDM1, which are known to be important in the molecular pathogenesis of DLBCL,” they wrote. A composite score was developed to reflect the numerical presence or absence of mutations in the gene set, they explained, adding that patients with a high composite score had a significantly higher overall response rate and longer progression-free survival than did patients with a lower score.
In addition, idelalisib treatment resulted in a feedback activation of PI3Ka in ABC DLBCL cells.
“This rebound of PI3K activity was overcome by subsequent PI3Ka inhibition in preclinical DLBCL models, further underscoring the necessity of inhibiting both PI3Ka and PI3Kd to achieve responses in ABC DLBCL,” they wrote, adding that “[i]n ABC DLBCL models treated with the PI3Ka/PI3Kd inhibitor AZD8835, activated CARD11 mutations were identified as a mechanism of resistance.”
Investigations looking at various treatment combinations to overcome resistance to PI3K inhibition and improve the efficacy of targeted approaches are under way, they said.
For example, copanlisib plus the BCL-2 inhibitor venetoclax showed “synergistic activity in BCR-dependent DLBCLs, with genetic bases for BCL-2 dysregulation in vitro and in vivo,” and combination treatment with umbralisib and the proteasome inhibitor carfilzomib showed synergistic cytotoxicity in B-cell lymphoma, they said, noting that the latter combination is currently being evaluated in patients with DLBCL.
This work was supported by a research grant from the Deutsche Krebshilfe. Dr. Xu reported having no financial disclosures.
, a review of the relevant literature suggests.
“In addition ... single-agent regimens are most likely not efficient enough to substantially improve the outcome of patients with DLBCL,” Wendan Xu and colleagues at University Hospital Munster, Germany, concluded, based on their review.
Indeed, novel combinations that include B-cell receptor (BCR) signaling and phosphatidylinositol 3-kinase (PI3K) inhibitors are needed for DLBCL treatment, and treatment should also include conventional chemoimmunotherapeutic regimens as well as other targeted agents and novel immunologic approaches, they wrote. Such novel combinations could overcome mechanisms of resistance and increase cure rates in individuals with DLBCL, they contended.
The authors’ observations are based on a search of the available data, from which they summarized the “current understanding of BCR signaling with a special focus on the PI3K pathway and its role in the pathogenesis of DLBCL.”
The addition of the anti-CD20 antibody rituximab to the CHOP regimen (cyclophosphamide, doxorubicin, vincristine, and prednisone) significantly improved outcomes for patients with DLBCL, but about a third of patients are not cured by the rituximab-CHOP (R-CHOP) regimen and subsequent therapies, they said, explaining their rationale for the review.
“A better understanding of the molecular pathogenesis is warranted to use novel targeted agents in an optimal manner,” they said.
The authors also addressed clinical implications of the findings, and mechanisms of resistance to PI3k inhibitors. For example, they noted that:
–Bruton’s tyrosine kinase (BTK) inhibitors may be beneficial when added to R-CHOP.
In the randomized phase 3 PHOENIX trial, ibrutinib plus R-CHOP versus R-CHOP alone in patients with non–germinal center B-cell (non-GCB) DLBCL showed a survival benefit in patients over 60 years of age, which suggests a possible role for “an intensified R-CHOP regimen that includes a BTK inhibitor” in these patients, they said. They added that confirmatory trials are under way, including the ESCALADE trial looking at the second-generation BTK inhibitor acalabrutinib combined with R-CHOP versus R-CHOP alone in patients with untreated DLBCL.
–Results have been mixed with PI3K inhibitors.
Various PI3K inhibitors have been evaluated for the treatment of patients with DLBCL.
Idelalisib, a first-in-class PI3K-specific inhibitor approved for treatment of relapsed/refractory (r/r) follicular lymphoma, small lymphocytic lymphoma, and chronic lymphocytic leukemia (CLL), showed only modest activity in preclinical DLBCL models, and no responses were detectable in a small trial of patients with r/r DLBCL, the authors said. “Severe toxic side effects and treatment-related deaths occurred in several clinical trials that tested idelalisib in combination with antibodies alone or with antibodies and chemotherapy, leading to the premature discontinuation of some of these studies,” they noted.
Other studies investigating idelalisib plus lenalidomide and rituximab or the spleen tyrosine kinase (SYK) inhibitor entospletinib in patients with r/r CLL or lymphoma were also halted because of “overwhelming, immune-mediated pulmonary and/or hepatic toxicities.”
Copanlisib, an intravenous pan-class I PI3K inhibitor with preferential inhibition of PI3Ka and PI3Kd, showed some promise as monotherapy in a phase 2 trial of patients with r/r DLBCL. The overall response rate was about 20%, and response was “numerically higher” in activated B-cell like (ABC) DLBCL, compared with GCB DLBCL (32% vs. 13%), confirming preclinical data that showed PI3Ka/d inhibition effectiveness mainly in ABC DLBCL.
“Compared with idelalisib, copanlisib appears to have a more favorable toxicity profile, with a lower incidence of severe complications,” they said, adding that a phase 2 trial of copanlisib plus R-CHOP as first-line therapy for patients with DLBCL is under way.
Further, monotherapy with buparlisib, a pan-class I PI3K inhibitor, was associated with a low response rate of 11.5% in a DLBCL subcohort in a phase 2 study, whereas parsaclisib, a next-generation inhibitor with specificity to the PI3Kd isoform, showed efficacy as a monotherapy in patients with r/r DLBCL in a phase 2 study (overall response rate, 25.5%), they said, adding that other PI3K inhibitors with additional inhibitory effects are under clinical development.
–Various molecular mechanisms of resistance to PI3K inhibitors have been described preclinically and clinically.
In an unbiased exploratory analysis of samples from patients treated with copanlisib, a 16-gene mutation signature that separated responders from nonresponders was identified, the authors said.
The finding suggests that genetic aberrations dictate response to PI3K inhibitors, they noted.
“This 16-gene signature included TNFAIP3, CREBBP, and PRDM1, which are known to be important in the molecular pathogenesis of DLBCL,” they wrote. A composite score was developed to reflect the numerical presence or absence of mutations in the gene set, they explained, adding that patients with a high composite score had a significantly higher overall response rate and longer progression-free survival than did patients with a lower score.
In addition, idelalisib treatment resulted in a feedback activation of PI3Ka in ABC DLBCL cells.
“This rebound of PI3K activity was overcome by subsequent PI3Ka inhibition in preclinical DLBCL models, further underscoring the necessity of inhibiting both PI3Ka and PI3Kd to achieve responses in ABC DLBCL,” they wrote, adding that “[i]n ABC DLBCL models treated with the PI3Ka/PI3Kd inhibitor AZD8835, activated CARD11 mutations were identified as a mechanism of resistance.”
Investigations looking at various treatment combinations to overcome resistance to PI3K inhibition and improve the efficacy of targeted approaches are under way, they said.
For example, copanlisib plus the BCL-2 inhibitor venetoclax showed “synergistic activity in BCR-dependent DLBCLs, with genetic bases for BCL-2 dysregulation in vitro and in vivo,” and combination treatment with umbralisib and the proteasome inhibitor carfilzomib showed synergistic cytotoxicity in B-cell lymphoma, they said, noting that the latter combination is currently being evaluated in patients with DLBCL.
This work was supported by a research grant from the Deutsche Krebshilfe. Dr. Xu reported having no financial disclosures.
FROM BLOOD
COVID boosters help protect blood cancer patients, but some still vulnerable
particularly in those with B-cell malignancies, an observational study suggests.
The findings, based on a review of COVID-19 booster vaccine recipients with B cell–derived hematologic malignancies from the prospective Leukemia & Lymphoma Society National Registry, provide valuable information about booster vaccinations in this vulnerable population, according to LLS chief medical officer and lead study author Gwen Nichols, MD.
The LLS Registry data
Of 49 patients included in the review, 38 failed to make antispike (anti-S) antibodies after full vaccination, and of those, 21 seroconverted after booster vaccination and 11 experienced seroelevation after the booster.
The patients who did not seroconvert were seronegative after initial vaccination and experienced no change in antibody level after the booster vaccination. In contrast, the 21 who seroconverted had a median 23.1 AU/ml increase in antibody level, Dr. Nichols, along with LLS chief scientific officer Lee M. Greenberger, PhD,and their colleagues reported online Sept. 6, 2021, in Cancer Cell.
Similar proportions of seroconverted patients had low-level responses between 2.2 and 23.1 AU/mL and robust response between 125 and 2,500 AU/mL, they noted. The 11 patients with seroelevation were seropositive after full vaccination and demonstrated a median increase of 2,128 AU/mL in antibody level after the booster vaccination.
Therapy effects on vaccine response
Outcomes of the current analysis also confirmed the authors’ previous finding, which suggested that “both disease and therapies can affect the serological response to vaccination,” they wrote, explaining that, among the 12 patients who received no malignancy-targeted treatments in the past 2 years, only 1 was a nonresponder, 7 demonstrated seroconversion, and 4 demonstrated seroelevation.
“In contrast, among the 21 patients who completed therapy with anti-CD20 antibodies either alone or in combination with other therapies, 12 patients were nonresponders, 7 patients demonstrated seroconversion, and 2 patients demonstrated seroelevation,” they added.
The authors also noted that five of seven patients who completed anti-CD20 antibody therapy alone or in combination with chemotherapy at least 7 months prior to the booster vaccination demonstrated seroconversion or seroelevation, whereas many of the patients with recent or maintenance anti-CD20 antibody therapy before the booster vaccination failed to seroconvert afterward.
In light of previous findings showing B-cell recovery begins 6-9 months after rituximab therapy, these data suggest that recent anti-CD20 antibody-containing treatment regimens may suppress booster vaccination response, the authors wrote.
The current data also support the group’s prior finding that use of a Bruton tyrosine kinase inhibitor may suppress vaccine response: Of the patients in the current study who experienced seroelevation and were treated with a BTKi, two discontinued BTKi therapy 7-23 months prior to booster vaccination, one maintained a low dose of ibrutinib before booster vaccination, one maintained BTKi therapy continuously before and after the booster, and the two who experienced marked seroconversion after booster vaccination stopped BTKi therapy at least 4 months prior.
Conversely, five patients with a very weak seroconversion and two patients with moderate seroconversion maintained BTKi therapy during booster vaccination.
“These data suggest that BTKi therapy can interfere with a response to booster vaccination,” they wrote, noting, however, that “it is encouraging that seven patients ... maintained on a BTKi seroconverted or experienced seroelevation after booster vaccination and [this] is consistent with a previous report on one patient.”
Study limitations and lessons
Although the findings of this study are limited by the small number of patients, the fact that treatment and disease were patient reported, and a lack of data on “antibody responses, particularly to the delta variant, B-cell memory, or T-cell responses,” they nevertheless provide encouraging news, Dr. Nichols told this news organization.
“Many blood cancer patients are getting boosters and a good number are able to make antibody with an additional dose. This is giving us much needed information about boosters,” she said. “Through the LLS National Patient Registry, we anticipate having data on hundreds of more patients over the course of the next few months.”
The information is needed because data suggest that up to 25% of patients with hematologic malignancies fail to make anti-S antibodies after full COVID-19 vaccination and that seronegative patients may be especially vulnerable to breakthrough infections, she and her colleagues noted.
Patients with B-cell malignancies are at the highest risk, and this is particularly concerning as some patients with blood cancer who contracted COVID-19 in the prevaccine period of the pandemic had “prolonged, severe infections; generated variant strains; and demonstrated significantly higher mortality rates compared to the general population,” they said.
However, a recently published placebo-controlled trial that demonstrated a booster vaccination–mediated increase in anti-S antibodies and neutralizing antibodies in immunosuppressed patients, and the current review, which focused on patients who obtained booster vaccinations prior to Aug. 12, 2021 (when the Food and Drug Administration granted emergency use authorization for booster doses in immunocompromised people), offer findings that suggest these patients may benefit from receiving COVID-19 boosters.
“We conclude that some patients with hematologic malignancies who are seronegative after a full course of vaccination may benefit from a booster,” the authors wrote. They added a warning: “Regulators, patients, and health care providers should be aware that a sizable subset of patients with blood cancer may remain at risk of breakthrough COVID-19 infections after full vaccination followed by booster vaccination.”
Dr. Nichols stressed that the findings “do not in any way suggest that blood cancer patients should stop therapy to get an antibody response to the vaccinations.”
“LLS is encouraging blood cancer patients to get vaccinated and to continue taking preventive measures such as wearing masks, social distancing, hand washing, and avoiding crowds and poorly ventilated indoor spaces,” she said.
Sergio Giralt, MD, professor and deputy head of the division of hematologic malignancies at Memorial Sloan Kettering Cancer Center, New York, further emphasized the importance of preventive measures.
“I think the extra booster will go a long way to protect our patients at this time but should not be used as a replacement for masking indoors and continued social distancing in this vulnerable patient population,” he said.
This study was supported by the LLS.
particularly in those with B-cell malignancies, an observational study suggests.
The findings, based on a review of COVID-19 booster vaccine recipients with B cell–derived hematologic malignancies from the prospective Leukemia & Lymphoma Society National Registry, provide valuable information about booster vaccinations in this vulnerable population, according to LLS chief medical officer and lead study author Gwen Nichols, MD.
The LLS Registry data
Of 49 patients included in the review, 38 failed to make antispike (anti-S) antibodies after full vaccination, and of those, 21 seroconverted after booster vaccination and 11 experienced seroelevation after the booster.
The patients who did not seroconvert were seronegative after initial vaccination and experienced no change in antibody level after the booster vaccination. In contrast, the 21 who seroconverted had a median 23.1 AU/ml increase in antibody level, Dr. Nichols, along with LLS chief scientific officer Lee M. Greenberger, PhD,and their colleagues reported online Sept. 6, 2021, in Cancer Cell.
Similar proportions of seroconverted patients had low-level responses between 2.2 and 23.1 AU/mL and robust response between 125 and 2,500 AU/mL, they noted. The 11 patients with seroelevation were seropositive after full vaccination and demonstrated a median increase of 2,128 AU/mL in antibody level after the booster vaccination.
Therapy effects on vaccine response
Outcomes of the current analysis also confirmed the authors’ previous finding, which suggested that “both disease and therapies can affect the serological response to vaccination,” they wrote, explaining that, among the 12 patients who received no malignancy-targeted treatments in the past 2 years, only 1 was a nonresponder, 7 demonstrated seroconversion, and 4 demonstrated seroelevation.
“In contrast, among the 21 patients who completed therapy with anti-CD20 antibodies either alone or in combination with other therapies, 12 patients were nonresponders, 7 patients demonstrated seroconversion, and 2 patients demonstrated seroelevation,” they added.
The authors also noted that five of seven patients who completed anti-CD20 antibody therapy alone or in combination with chemotherapy at least 7 months prior to the booster vaccination demonstrated seroconversion or seroelevation, whereas many of the patients with recent or maintenance anti-CD20 antibody therapy before the booster vaccination failed to seroconvert afterward.
In light of previous findings showing B-cell recovery begins 6-9 months after rituximab therapy, these data suggest that recent anti-CD20 antibody-containing treatment regimens may suppress booster vaccination response, the authors wrote.
The current data also support the group’s prior finding that use of a Bruton tyrosine kinase inhibitor may suppress vaccine response: Of the patients in the current study who experienced seroelevation and were treated with a BTKi, two discontinued BTKi therapy 7-23 months prior to booster vaccination, one maintained a low dose of ibrutinib before booster vaccination, one maintained BTKi therapy continuously before and after the booster, and the two who experienced marked seroconversion after booster vaccination stopped BTKi therapy at least 4 months prior.
Conversely, five patients with a very weak seroconversion and two patients with moderate seroconversion maintained BTKi therapy during booster vaccination.
“These data suggest that BTKi therapy can interfere with a response to booster vaccination,” they wrote, noting, however, that “it is encouraging that seven patients ... maintained on a BTKi seroconverted or experienced seroelevation after booster vaccination and [this] is consistent with a previous report on one patient.”
Study limitations and lessons
Although the findings of this study are limited by the small number of patients, the fact that treatment and disease were patient reported, and a lack of data on “antibody responses, particularly to the delta variant, B-cell memory, or T-cell responses,” they nevertheless provide encouraging news, Dr. Nichols told this news organization.
“Many blood cancer patients are getting boosters and a good number are able to make antibody with an additional dose. This is giving us much needed information about boosters,” she said. “Through the LLS National Patient Registry, we anticipate having data on hundreds of more patients over the course of the next few months.”
The information is needed because data suggest that up to 25% of patients with hematologic malignancies fail to make anti-S antibodies after full COVID-19 vaccination and that seronegative patients may be especially vulnerable to breakthrough infections, she and her colleagues noted.
Patients with B-cell malignancies are at the highest risk, and this is particularly concerning as some patients with blood cancer who contracted COVID-19 in the prevaccine period of the pandemic had “prolonged, severe infections; generated variant strains; and demonstrated significantly higher mortality rates compared to the general population,” they said.
However, a recently published placebo-controlled trial that demonstrated a booster vaccination–mediated increase in anti-S antibodies and neutralizing antibodies in immunosuppressed patients, and the current review, which focused on patients who obtained booster vaccinations prior to Aug. 12, 2021 (when the Food and Drug Administration granted emergency use authorization for booster doses in immunocompromised people), offer findings that suggest these patients may benefit from receiving COVID-19 boosters.
“We conclude that some patients with hematologic malignancies who are seronegative after a full course of vaccination may benefit from a booster,” the authors wrote. They added a warning: “Regulators, patients, and health care providers should be aware that a sizable subset of patients with blood cancer may remain at risk of breakthrough COVID-19 infections after full vaccination followed by booster vaccination.”
Dr. Nichols stressed that the findings “do not in any way suggest that blood cancer patients should stop therapy to get an antibody response to the vaccinations.”
“LLS is encouraging blood cancer patients to get vaccinated and to continue taking preventive measures such as wearing masks, social distancing, hand washing, and avoiding crowds and poorly ventilated indoor spaces,” she said.
Sergio Giralt, MD, professor and deputy head of the division of hematologic malignancies at Memorial Sloan Kettering Cancer Center, New York, further emphasized the importance of preventive measures.
“I think the extra booster will go a long way to protect our patients at this time but should not be used as a replacement for masking indoors and continued social distancing in this vulnerable patient population,” he said.
This study was supported by the LLS.
particularly in those with B-cell malignancies, an observational study suggests.
The findings, based on a review of COVID-19 booster vaccine recipients with B cell–derived hematologic malignancies from the prospective Leukemia & Lymphoma Society National Registry, provide valuable information about booster vaccinations in this vulnerable population, according to LLS chief medical officer and lead study author Gwen Nichols, MD.
The LLS Registry data
Of 49 patients included in the review, 38 failed to make antispike (anti-S) antibodies after full vaccination, and of those, 21 seroconverted after booster vaccination and 11 experienced seroelevation after the booster.
The patients who did not seroconvert were seronegative after initial vaccination and experienced no change in antibody level after the booster vaccination. In contrast, the 21 who seroconverted had a median 23.1 AU/ml increase in antibody level, Dr. Nichols, along with LLS chief scientific officer Lee M. Greenberger, PhD,and their colleagues reported online Sept. 6, 2021, in Cancer Cell.
Similar proportions of seroconverted patients had low-level responses between 2.2 and 23.1 AU/mL and robust response between 125 and 2,500 AU/mL, they noted. The 11 patients with seroelevation were seropositive after full vaccination and demonstrated a median increase of 2,128 AU/mL in antibody level after the booster vaccination.
Therapy effects on vaccine response
Outcomes of the current analysis also confirmed the authors’ previous finding, which suggested that “both disease and therapies can affect the serological response to vaccination,” they wrote, explaining that, among the 12 patients who received no malignancy-targeted treatments in the past 2 years, only 1 was a nonresponder, 7 demonstrated seroconversion, and 4 demonstrated seroelevation.
“In contrast, among the 21 patients who completed therapy with anti-CD20 antibodies either alone or in combination with other therapies, 12 patients were nonresponders, 7 patients demonstrated seroconversion, and 2 patients demonstrated seroelevation,” they added.
The authors also noted that five of seven patients who completed anti-CD20 antibody therapy alone or in combination with chemotherapy at least 7 months prior to the booster vaccination demonstrated seroconversion or seroelevation, whereas many of the patients with recent or maintenance anti-CD20 antibody therapy before the booster vaccination failed to seroconvert afterward.
In light of previous findings showing B-cell recovery begins 6-9 months after rituximab therapy, these data suggest that recent anti-CD20 antibody-containing treatment regimens may suppress booster vaccination response, the authors wrote.
The current data also support the group’s prior finding that use of a Bruton tyrosine kinase inhibitor may suppress vaccine response: Of the patients in the current study who experienced seroelevation and were treated with a BTKi, two discontinued BTKi therapy 7-23 months prior to booster vaccination, one maintained a low dose of ibrutinib before booster vaccination, one maintained BTKi therapy continuously before and after the booster, and the two who experienced marked seroconversion after booster vaccination stopped BTKi therapy at least 4 months prior.
Conversely, five patients with a very weak seroconversion and two patients with moderate seroconversion maintained BTKi therapy during booster vaccination.
“These data suggest that BTKi therapy can interfere with a response to booster vaccination,” they wrote, noting, however, that “it is encouraging that seven patients ... maintained on a BTKi seroconverted or experienced seroelevation after booster vaccination and [this] is consistent with a previous report on one patient.”
Study limitations and lessons
Although the findings of this study are limited by the small number of patients, the fact that treatment and disease were patient reported, and a lack of data on “antibody responses, particularly to the delta variant, B-cell memory, or T-cell responses,” they nevertheless provide encouraging news, Dr. Nichols told this news organization.
“Many blood cancer patients are getting boosters and a good number are able to make antibody with an additional dose. This is giving us much needed information about boosters,” she said. “Through the LLS National Patient Registry, we anticipate having data on hundreds of more patients over the course of the next few months.”
The information is needed because data suggest that up to 25% of patients with hematologic malignancies fail to make anti-S antibodies after full COVID-19 vaccination and that seronegative patients may be especially vulnerable to breakthrough infections, she and her colleagues noted.
Patients with B-cell malignancies are at the highest risk, and this is particularly concerning as some patients with blood cancer who contracted COVID-19 in the prevaccine period of the pandemic had “prolonged, severe infections; generated variant strains; and demonstrated significantly higher mortality rates compared to the general population,” they said.
However, a recently published placebo-controlled trial that demonstrated a booster vaccination–mediated increase in anti-S antibodies and neutralizing antibodies in immunosuppressed patients, and the current review, which focused on patients who obtained booster vaccinations prior to Aug. 12, 2021 (when the Food and Drug Administration granted emergency use authorization for booster doses in immunocompromised people), offer findings that suggest these patients may benefit from receiving COVID-19 boosters.
“We conclude that some patients with hematologic malignancies who are seronegative after a full course of vaccination may benefit from a booster,” the authors wrote. They added a warning: “Regulators, patients, and health care providers should be aware that a sizable subset of patients with blood cancer may remain at risk of breakthrough COVID-19 infections after full vaccination followed by booster vaccination.”
Dr. Nichols stressed that the findings “do not in any way suggest that blood cancer patients should stop therapy to get an antibody response to the vaccinations.”
“LLS is encouraging blood cancer patients to get vaccinated and to continue taking preventive measures such as wearing masks, social distancing, hand washing, and avoiding crowds and poorly ventilated indoor spaces,” she said.
Sergio Giralt, MD, professor and deputy head of the division of hematologic malignancies at Memorial Sloan Kettering Cancer Center, New York, further emphasized the importance of preventive measures.
“I think the extra booster will go a long way to protect our patients at this time but should not be used as a replacement for masking indoors and continued social distancing in this vulnerable patient population,” he said.
This study was supported by the LLS.
FROM CANCER CELL
Real-world CAR T outcomes for DLBCL mimic clinical trials
Data from a large French registry on a multicenter experience with chimeric antigen receptor T-cell (CAR T) therapy for aggressive lymphoma suggests that the favorable outcomes seen in clinical trials can be replicated in the real world.
Among 481 patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) treated with either of two commercially available CAR T products – tisagenlecleucel (Kymriah) or axicabtagene ciloleucel (Yescarta) – the duration of responses, progression-free survival (PFS), and overall survival (OS) rates at 6 months mirror those seen in clinical trials, reported Steven LeGouill, MD, PhD, from the University of Nantes (France), on behalf of colleagues in the DESCAR-T (Dispositive d’Evaluation et de Suivi des CAR-T) registry.
“CAR T has now become a standard of care in a lot of French centers, with more than 640 patients treated with CAR T in less than 2 years. The DESCAR-T real-life experience mimics the experience that had been previously by other real-life registries but also in clinical trials. We didn’t see new emerging toxicity signals in real life,” he said in an oral abstract session during the European Hematology Association annual congress (Abstract S216).
“I am convinced that a population registry about CAR T–treated patients is needed,” commented Pieter Sonneveld, MD, from Erasmus Medical Center in Rotterdam, the Netherlands, who was not involved in the study.
“Selection criteria for CAR T trials have been incredibly restrictive, and academic trials have not gained ground yet. It is important to collect and analyze more data, include non-trial patients and analyze long-term follow-up in order to determine the real effects of this innovative treatment in lymphoma and other diseases,” he said.
Dr. Sonneveld, EHA past president, was the moderator a briefing where Dr. LeGouill presented the DESCAR-T study findings.
Natalie Sophia Grover, MD, a leukemia and lymphoma specialist at the University of North Carolina at Chapel Hill, noted in an interview that “there have been several publications recently that have shown that these promising outcomes for these really refractory, high-risk patients with diffuse large B-cell lymphoma seem to be similar with what we’ve seen in trials, which is definitely exciting.”
She noted that the median time from CAR T order to treatment in the study, 50 days, was longer than in her experience.
“Generally, from collection to treatment is less than a month. Looking at that, I would have expected more patients not to make it CAR T, but nearly 90% of patients who had collections got treatment, which is pretty good. Those patients that didn’t make it to treatment had really poor outcomes,” she said.
Dr. Grover was not involved in the study.
More data, s’il vous plait
The DESCAR-T registry was created in response to a request from French health authorities for data beyond that provided in the EBMT patient registry. The health authorities asked for characterization of the CAR T–eligible population in an intention to treat, 15-year follow-up of both CAR T recipients and candidates who were not treated for whatever reasons, and a full accounting of previous lines of therapy.
Dr. LeGouill presented the first analysis of data from the registry involving 19 enrolling site and 647 patients with DLBCL for whom CAR T cells were ordered from January 2018 to March 2021.
Of the 647 candidates, 10 did not have CAR T ordered for reasons that included patient deaths or disease progression, infection, and patient refusal. An additional 30 patients either had leukapheresis performed or pending, and 607 had CAR T ordered.
Of the 607 patients, 53 did not receive CAR T infusions because of disease progression, death before product administration, manufacturing or leukapheresis failures, uncontrolled infections, patient choice, or progression of other malignancies.
That left 550 patients (85%) who received a CAR T product, either tisagenlecleucel (200 patients) or axicabtagene ciloleucel (350 patients).
Among all patients, the median age at CAR T order was 63 for patients who received tisagenlecleucel, and 65 for patients receiving axicabtagene ciloleucel. Patients 65 and older comprised 44% and 51% of the population, respectively.
Patients treated with each CAR T product had a median of three prior lines of therapy.
Manageable toxicities
Toxicities within 10 days of CAR T infusion included 418 cases among 515 patients (81.2%) of cytokine release syndrome, with most being grade 1 or 2 in severity; 44 patients had grade 3 or 4 CRS.
Any-grade neurotoxicity was seen in 184 patients (35.7%), primarily grade 1 or 2 in severity; 50 patients had grade 3 or greater neurotoxicity.
Of 427 patients with at least one CAR T–specific toxicity within 10 days, 139 (32.8%) required ICU admission, 325 (76,1%) were treated for CAR T–specific toxicities, 278 (65.1%) received tocilizumab, 13 (3%) received siltuximab, and 176 (41.2%) received corticosteroids.
Favorable outcomes
Overall response rates, at 1, 3, and 6 months post infusions were 70.6%, 56.3%, and 60%, respectively, with the majority of response at each time point being complete responses (CR).
The 6-month overall survival (OS) rate among all patients who were treated was 83.7%, compared with 5.5% for patients who did not receive CAR T infusions.
Progression-free survival (PFS) at 6 months was 44.5%, and 57.7% of patients had an ongoing response at the same time point.
Among patients who received bridging therapy between leukapheresis and CAR T infusion, the 6-month PFS was 58.4% for patients with either a CR, partial response, or stable disease, compared with 63.3% for patients who did not receive bridging therapy, and 29.8% for those with disease progression.
The respective 6 months OS rates were 87.4%, 82.3%, and 65.5%.
The results showed that patients who do not have at least stable disease at the time of CAR T infusion are at risk for early relapse, but approximately 30% of these patients still had long-term disease control, Dr. LeGouill said.
He acknowledged that longer follow-up will be need to see whether the plateaus in the PFS and OS curves the investigators observed can be maintained over time. Questions that still need to be answered include the impact of bridging therapy or disease status at the start of treatment on outcomes, and how to improve CAR T efficacy based on individual patient characteristics.
The registry will be extended to include data on patients treated with CAR T for mantle cell lymphoma and multiple myeloma, investigators announced.
The study is supported by participating centers and Gilead/Kite and Novartis. Dr. LeGouill disclosed advisory board activity and honoraria from the companies and others. Dr. Grover disclosed advisory board participating for Kite and others. Dr. Sonneveld has disclosed research grants and honoraria from several companies, not including Kite or Novartis.
Data from a large French registry on a multicenter experience with chimeric antigen receptor T-cell (CAR T) therapy for aggressive lymphoma suggests that the favorable outcomes seen in clinical trials can be replicated in the real world.
Among 481 patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) treated with either of two commercially available CAR T products – tisagenlecleucel (Kymriah) or axicabtagene ciloleucel (Yescarta) – the duration of responses, progression-free survival (PFS), and overall survival (OS) rates at 6 months mirror those seen in clinical trials, reported Steven LeGouill, MD, PhD, from the University of Nantes (France), on behalf of colleagues in the DESCAR-T (Dispositive d’Evaluation et de Suivi des CAR-T) registry.
“CAR T has now become a standard of care in a lot of French centers, with more than 640 patients treated with CAR T in less than 2 years. The DESCAR-T real-life experience mimics the experience that had been previously by other real-life registries but also in clinical trials. We didn’t see new emerging toxicity signals in real life,” he said in an oral abstract session during the European Hematology Association annual congress (Abstract S216).
“I am convinced that a population registry about CAR T–treated patients is needed,” commented Pieter Sonneveld, MD, from Erasmus Medical Center in Rotterdam, the Netherlands, who was not involved in the study.
“Selection criteria for CAR T trials have been incredibly restrictive, and academic trials have not gained ground yet. It is important to collect and analyze more data, include non-trial patients and analyze long-term follow-up in order to determine the real effects of this innovative treatment in lymphoma and other diseases,” he said.
Dr. Sonneveld, EHA past president, was the moderator a briefing where Dr. LeGouill presented the DESCAR-T study findings.
Natalie Sophia Grover, MD, a leukemia and lymphoma specialist at the University of North Carolina at Chapel Hill, noted in an interview that “there have been several publications recently that have shown that these promising outcomes for these really refractory, high-risk patients with diffuse large B-cell lymphoma seem to be similar with what we’ve seen in trials, which is definitely exciting.”
She noted that the median time from CAR T order to treatment in the study, 50 days, was longer than in her experience.
“Generally, from collection to treatment is less than a month. Looking at that, I would have expected more patients not to make it CAR T, but nearly 90% of patients who had collections got treatment, which is pretty good. Those patients that didn’t make it to treatment had really poor outcomes,” she said.
Dr. Grover was not involved in the study.
More data, s’il vous plait
The DESCAR-T registry was created in response to a request from French health authorities for data beyond that provided in the EBMT patient registry. The health authorities asked for characterization of the CAR T–eligible population in an intention to treat, 15-year follow-up of both CAR T recipients and candidates who were not treated for whatever reasons, and a full accounting of previous lines of therapy.
Dr. LeGouill presented the first analysis of data from the registry involving 19 enrolling site and 647 patients with DLBCL for whom CAR T cells were ordered from January 2018 to March 2021.
Of the 647 candidates, 10 did not have CAR T ordered for reasons that included patient deaths or disease progression, infection, and patient refusal. An additional 30 patients either had leukapheresis performed or pending, and 607 had CAR T ordered.
Of the 607 patients, 53 did not receive CAR T infusions because of disease progression, death before product administration, manufacturing or leukapheresis failures, uncontrolled infections, patient choice, or progression of other malignancies.
That left 550 patients (85%) who received a CAR T product, either tisagenlecleucel (200 patients) or axicabtagene ciloleucel (350 patients).
Among all patients, the median age at CAR T order was 63 for patients who received tisagenlecleucel, and 65 for patients receiving axicabtagene ciloleucel. Patients 65 and older comprised 44% and 51% of the population, respectively.
Patients treated with each CAR T product had a median of three prior lines of therapy.
Manageable toxicities
Toxicities within 10 days of CAR T infusion included 418 cases among 515 patients (81.2%) of cytokine release syndrome, with most being grade 1 or 2 in severity; 44 patients had grade 3 or 4 CRS.
Any-grade neurotoxicity was seen in 184 patients (35.7%), primarily grade 1 or 2 in severity; 50 patients had grade 3 or greater neurotoxicity.
Of 427 patients with at least one CAR T–specific toxicity within 10 days, 139 (32.8%) required ICU admission, 325 (76,1%) were treated for CAR T–specific toxicities, 278 (65.1%) received tocilizumab, 13 (3%) received siltuximab, and 176 (41.2%) received corticosteroids.
Favorable outcomes
Overall response rates, at 1, 3, and 6 months post infusions were 70.6%, 56.3%, and 60%, respectively, with the majority of response at each time point being complete responses (CR).
The 6-month overall survival (OS) rate among all patients who were treated was 83.7%, compared with 5.5% for patients who did not receive CAR T infusions.
Progression-free survival (PFS) at 6 months was 44.5%, and 57.7% of patients had an ongoing response at the same time point.
Among patients who received bridging therapy between leukapheresis and CAR T infusion, the 6-month PFS was 58.4% for patients with either a CR, partial response, or stable disease, compared with 63.3% for patients who did not receive bridging therapy, and 29.8% for those with disease progression.
The respective 6 months OS rates were 87.4%, 82.3%, and 65.5%.
The results showed that patients who do not have at least stable disease at the time of CAR T infusion are at risk for early relapse, but approximately 30% of these patients still had long-term disease control, Dr. LeGouill said.
He acknowledged that longer follow-up will be need to see whether the plateaus in the PFS and OS curves the investigators observed can be maintained over time. Questions that still need to be answered include the impact of bridging therapy or disease status at the start of treatment on outcomes, and how to improve CAR T efficacy based on individual patient characteristics.
The registry will be extended to include data on patients treated with CAR T for mantle cell lymphoma and multiple myeloma, investigators announced.
The study is supported by participating centers and Gilead/Kite and Novartis. Dr. LeGouill disclosed advisory board activity and honoraria from the companies and others. Dr. Grover disclosed advisory board participating for Kite and others. Dr. Sonneveld has disclosed research grants and honoraria from several companies, not including Kite or Novartis.
Data from a large French registry on a multicenter experience with chimeric antigen receptor T-cell (CAR T) therapy for aggressive lymphoma suggests that the favorable outcomes seen in clinical trials can be replicated in the real world.
Among 481 patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) treated with either of two commercially available CAR T products – tisagenlecleucel (Kymriah) or axicabtagene ciloleucel (Yescarta) – the duration of responses, progression-free survival (PFS), and overall survival (OS) rates at 6 months mirror those seen in clinical trials, reported Steven LeGouill, MD, PhD, from the University of Nantes (France), on behalf of colleagues in the DESCAR-T (Dispositive d’Evaluation et de Suivi des CAR-T) registry.
“CAR T has now become a standard of care in a lot of French centers, with more than 640 patients treated with CAR T in less than 2 years. The DESCAR-T real-life experience mimics the experience that had been previously by other real-life registries but also in clinical trials. We didn’t see new emerging toxicity signals in real life,” he said in an oral abstract session during the European Hematology Association annual congress (Abstract S216).
“I am convinced that a population registry about CAR T–treated patients is needed,” commented Pieter Sonneveld, MD, from Erasmus Medical Center in Rotterdam, the Netherlands, who was not involved in the study.
“Selection criteria for CAR T trials have been incredibly restrictive, and academic trials have not gained ground yet. It is important to collect and analyze more data, include non-trial patients and analyze long-term follow-up in order to determine the real effects of this innovative treatment in lymphoma and other diseases,” he said.
Dr. Sonneveld, EHA past president, was the moderator a briefing where Dr. LeGouill presented the DESCAR-T study findings.
Natalie Sophia Grover, MD, a leukemia and lymphoma specialist at the University of North Carolina at Chapel Hill, noted in an interview that “there have been several publications recently that have shown that these promising outcomes for these really refractory, high-risk patients with diffuse large B-cell lymphoma seem to be similar with what we’ve seen in trials, which is definitely exciting.”
She noted that the median time from CAR T order to treatment in the study, 50 days, was longer than in her experience.
“Generally, from collection to treatment is less than a month. Looking at that, I would have expected more patients not to make it CAR T, but nearly 90% of patients who had collections got treatment, which is pretty good. Those patients that didn’t make it to treatment had really poor outcomes,” she said.
Dr. Grover was not involved in the study.
More data, s’il vous plait
The DESCAR-T registry was created in response to a request from French health authorities for data beyond that provided in the EBMT patient registry. The health authorities asked for characterization of the CAR T–eligible population in an intention to treat, 15-year follow-up of both CAR T recipients and candidates who were not treated for whatever reasons, and a full accounting of previous lines of therapy.
Dr. LeGouill presented the first analysis of data from the registry involving 19 enrolling site and 647 patients with DLBCL for whom CAR T cells were ordered from January 2018 to March 2021.
Of the 647 candidates, 10 did not have CAR T ordered for reasons that included patient deaths or disease progression, infection, and patient refusal. An additional 30 patients either had leukapheresis performed or pending, and 607 had CAR T ordered.
Of the 607 patients, 53 did not receive CAR T infusions because of disease progression, death before product administration, manufacturing or leukapheresis failures, uncontrolled infections, patient choice, or progression of other malignancies.
That left 550 patients (85%) who received a CAR T product, either tisagenlecleucel (200 patients) or axicabtagene ciloleucel (350 patients).
Among all patients, the median age at CAR T order was 63 for patients who received tisagenlecleucel, and 65 for patients receiving axicabtagene ciloleucel. Patients 65 and older comprised 44% and 51% of the population, respectively.
Patients treated with each CAR T product had a median of three prior lines of therapy.
Manageable toxicities
Toxicities within 10 days of CAR T infusion included 418 cases among 515 patients (81.2%) of cytokine release syndrome, with most being grade 1 or 2 in severity; 44 patients had grade 3 or 4 CRS.
Any-grade neurotoxicity was seen in 184 patients (35.7%), primarily grade 1 or 2 in severity; 50 patients had grade 3 or greater neurotoxicity.
Of 427 patients with at least one CAR T–specific toxicity within 10 days, 139 (32.8%) required ICU admission, 325 (76,1%) were treated for CAR T–specific toxicities, 278 (65.1%) received tocilizumab, 13 (3%) received siltuximab, and 176 (41.2%) received corticosteroids.
Favorable outcomes
Overall response rates, at 1, 3, and 6 months post infusions were 70.6%, 56.3%, and 60%, respectively, with the majority of response at each time point being complete responses (CR).
The 6-month overall survival (OS) rate among all patients who were treated was 83.7%, compared with 5.5% for patients who did not receive CAR T infusions.
Progression-free survival (PFS) at 6 months was 44.5%, and 57.7% of patients had an ongoing response at the same time point.
Among patients who received bridging therapy between leukapheresis and CAR T infusion, the 6-month PFS was 58.4% for patients with either a CR, partial response, or stable disease, compared with 63.3% for patients who did not receive bridging therapy, and 29.8% for those with disease progression.
The respective 6 months OS rates were 87.4%, 82.3%, and 65.5%.
The results showed that patients who do not have at least stable disease at the time of CAR T infusion are at risk for early relapse, but approximately 30% of these patients still had long-term disease control, Dr. LeGouill said.
He acknowledged that longer follow-up will be need to see whether the plateaus in the PFS and OS curves the investigators observed can be maintained over time. Questions that still need to be answered include the impact of bridging therapy or disease status at the start of treatment on outcomes, and how to improve CAR T efficacy based on individual patient characteristics.
The registry will be extended to include data on patients treated with CAR T for mantle cell lymphoma and multiple myeloma, investigators announced.
The study is supported by participating centers and Gilead/Kite and Novartis. Dr. LeGouill disclosed advisory board activity and honoraria from the companies and others. Dr. Grover disclosed advisory board participating for Kite and others. Dr. Sonneveld has disclosed research grants and honoraria from several companies, not including Kite or Novartis.
FROM EHA 2021
Experimental antibody-drug conjugate shown active against r/r DLBCL
Patients with relapsed or refractory B-cell non-Hodgkin lymphomas who are not candidates for hematopoietic stem cell transplant have a generally poor prognosis and few treatment options, but an experimental combination of the antibody-drug conjugate naratuximab with rituximab showed promising efficacy and acceptable safety in these patients in a phase 2 trial.
Among patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL) the combination was associated with a 44.7% overall response rate, including 31.6% complete responses, and two-thirds of patients had responses lasting more than 12 months, reported Moshe Yair Levy, MD, from Texas Oncology–Baylor Charles A Sammons Cancer Center in Dallas.
“This is, in my viewpoint, very exciting therapy,” he said in a question-and-answer session following his presentation of the data in a late-breaking abstract session during the European Hematology Association annual congress. (Abstract LB1903).
Naratuximab emtansine is an investigational antibody-drug conjugate (ADC) consisting of a humanized monoclonal antibody against CD37, a surface marker on B lymphocytes that is highly expressed in non-Hodgkin lymphoma (NHL), conjugated to a cytotoxic derivative of maitansine.
CD37 is also an internalizable cell-surface antigen, making it an attractive candidate for an ADC approach.
In a phase 1 trial, naratuximab monotherapy showed a good safety profile and a 22% overall response rate, Dr. Levy noted.
“What they found is that, if you coadminister this ADC with rituximab, you’re actually going to get more internalization of the CD37 monoclonal, therefore more payload delivered to your target cells,” he said.
He reported results of a multicenter, adaptive phase 2 study of the combination in patients with DLBCL and other relapsed/refractory NHL.
DLBCL and others
The trial was divided into two parts, with the first consisting of a safety run-in phase with expansion in patients with confirmed diagnoses of relapsed/refractory NHL, including DLBCL, follicular lymphoma, mantle cell lymphoma, and marginal zone lymphoma.
Patients with double- or triple-hit disease (with translocations in MYC plus either BCL2 and/or BCL6), bulky disease, or transformed lymphoma were eligible.
The second part consisted of two cohorts of patients with DLBCL treated with naratuximab and rituximab either weekly or every 3 weeks.
All patients in the study had received one to six prior lines of therapy, and had Eastern Cooperative Oncology Group performance status of 0-2. Patients with CNS lymphomas or prior anti-CD37 targeting therapy were excluded.
The safety population included 50 patients with DLBCL assigned to therapy every 3 weeks, 30 assigned to weekly therapy, and 20 patients with other NHL.
DLBCL efficacy
A total of 76 patients with DLBCL were evaluable for efficacy.
The ORR was 44% for patients in both the weekly and every 3 week cohorts, with 31.6% having complete responses.
Among 61 patients with nonbulky disease (longest diameter 7.5 cm or less), the ORR was 50.8%, and among 28 patients who had three or more prior lines of therapy the ORR was 46.4%, with 32.1% having a complete response.
Among responders followed for a median of 15 months, the median duration of response was not reached, and 66% had responses lasting beyond 12 months.
In the weekly dosing DLBCL cohort, 53.3% of patients discontinued treatment of both study drugs because of disease progression, as did 58% of those in the every 3 week cohort, and 30% of patients with other lymphomas. Only eight patients discontinued the combination because of treatment-emergent adverse events. Six patients had treatment-emergent adverse events leading to naratuximab dose reduction.
The most common grade 3 or 4 adverse events were neutropenia, leukopenia, lymphopenia and thrombocytopenias. Dr. Levy commented that the use of granulocyte colony-stimulating factor, which was not mandatory in the study, would likely have lowered the incidence of cytopenias.
There were 10 deaths during the study, 2 of which were considered to be treatment related, occurring in 1 patient each in the DLBCL dosing cohorts; 1 of the patients died from pneumonitis, and the other from left ventricular heart failure.
Other patients deaths were attributed to non–treatment-related cardiac arrest, acute renal failure, exacerbation of chronic heart failure, respiratory failure, multiorgan failure, lung infection, or colon adenocarcinoma.
Q 3 weeks suffices
In the question-and-answer session following the presentation, Kenny Lei, MD, from the Chinese University of Hong Kong asked Dr. Levy what the half-life of naratuximab is, and what was the investigator’s rationale for testing a weekly dosing schedule.
“I think the reason they checked the two different regimens, the Q week and the Q 3-week group, is that they noted that [naratuximab] was cleared relatively quickly, and they wanted to see whether or not, by giving Q weekly, when you get a continuous CD37 site occupancy if they would have a better outcome. But as you saw, in the groups there was really no clinically relevant difference in outcome,” Dr. Levy said.
Andrew Davies, MD, PhD, from the University of Southampton (England), asked whether the neutropenia seen in the study was related to myeloid expression of the target of from the off-target deconjugated payload.
“I don’t know that I necessarily have the answer to that,” Dr. Levy replied. “Remember there is the CD20 monoclonal rituximab which we know can cause neutropenia, as well as the CD37 and the target payload. I don’t know if we have enough information to attribute it to one specific component of the therapy,” he said.
The study was funded by Debiopharm International. Dr. Levy disclosed speaker activities for multiple companies, not including Debiopharm. Dr. Lei and Dr. Davies had no disclosures relevant to the study.
Patients with relapsed or refractory B-cell non-Hodgkin lymphomas who are not candidates for hematopoietic stem cell transplant have a generally poor prognosis and few treatment options, but an experimental combination of the antibody-drug conjugate naratuximab with rituximab showed promising efficacy and acceptable safety in these patients in a phase 2 trial.
Among patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL) the combination was associated with a 44.7% overall response rate, including 31.6% complete responses, and two-thirds of patients had responses lasting more than 12 months, reported Moshe Yair Levy, MD, from Texas Oncology–Baylor Charles A Sammons Cancer Center in Dallas.
“This is, in my viewpoint, very exciting therapy,” he said in a question-and-answer session following his presentation of the data in a late-breaking abstract session during the European Hematology Association annual congress. (Abstract LB1903).
Naratuximab emtansine is an investigational antibody-drug conjugate (ADC) consisting of a humanized monoclonal antibody against CD37, a surface marker on B lymphocytes that is highly expressed in non-Hodgkin lymphoma (NHL), conjugated to a cytotoxic derivative of maitansine.
CD37 is also an internalizable cell-surface antigen, making it an attractive candidate for an ADC approach.
In a phase 1 trial, naratuximab monotherapy showed a good safety profile and a 22% overall response rate, Dr. Levy noted.
“What they found is that, if you coadminister this ADC with rituximab, you’re actually going to get more internalization of the CD37 monoclonal, therefore more payload delivered to your target cells,” he said.
He reported results of a multicenter, adaptive phase 2 study of the combination in patients with DLBCL and other relapsed/refractory NHL.
DLBCL and others
The trial was divided into two parts, with the first consisting of a safety run-in phase with expansion in patients with confirmed diagnoses of relapsed/refractory NHL, including DLBCL, follicular lymphoma, mantle cell lymphoma, and marginal zone lymphoma.
Patients with double- or triple-hit disease (with translocations in MYC plus either BCL2 and/or BCL6), bulky disease, or transformed lymphoma were eligible.
The second part consisted of two cohorts of patients with DLBCL treated with naratuximab and rituximab either weekly or every 3 weeks.
All patients in the study had received one to six prior lines of therapy, and had Eastern Cooperative Oncology Group performance status of 0-2. Patients with CNS lymphomas or prior anti-CD37 targeting therapy were excluded.
The safety population included 50 patients with DLBCL assigned to therapy every 3 weeks, 30 assigned to weekly therapy, and 20 patients with other NHL.
DLBCL efficacy
A total of 76 patients with DLBCL were evaluable for efficacy.
The ORR was 44% for patients in both the weekly and every 3 week cohorts, with 31.6% having complete responses.
Among 61 patients with nonbulky disease (longest diameter 7.5 cm or less), the ORR was 50.8%, and among 28 patients who had three or more prior lines of therapy the ORR was 46.4%, with 32.1% having a complete response.
Among responders followed for a median of 15 months, the median duration of response was not reached, and 66% had responses lasting beyond 12 months.
In the weekly dosing DLBCL cohort, 53.3% of patients discontinued treatment of both study drugs because of disease progression, as did 58% of those in the every 3 week cohort, and 30% of patients with other lymphomas. Only eight patients discontinued the combination because of treatment-emergent adverse events. Six patients had treatment-emergent adverse events leading to naratuximab dose reduction.
The most common grade 3 or 4 adverse events were neutropenia, leukopenia, lymphopenia and thrombocytopenias. Dr. Levy commented that the use of granulocyte colony-stimulating factor, which was not mandatory in the study, would likely have lowered the incidence of cytopenias.
There were 10 deaths during the study, 2 of which were considered to be treatment related, occurring in 1 patient each in the DLBCL dosing cohorts; 1 of the patients died from pneumonitis, and the other from left ventricular heart failure.
Other patients deaths were attributed to non–treatment-related cardiac arrest, acute renal failure, exacerbation of chronic heart failure, respiratory failure, multiorgan failure, lung infection, or colon adenocarcinoma.
Q 3 weeks suffices
In the question-and-answer session following the presentation, Kenny Lei, MD, from the Chinese University of Hong Kong asked Dr. Levy what the half-life of naratuximab is, and what was the investigator’s rationale for testing a weekly dosing schedule.
“I think the reason they checked the two different regimens, the Q week and the Q 3-week group, is that they noted that [naratuximab] was cleared relatively quickly, and they wanted to see whether or not, by giving Q weekly, when you get a continuous CD37 site occupancy if they would have a better outcome. But as you saw, in the groups there was really no clinically relevant difference in outcome,” Dr. Levy said.
Andrew Davies, MD, PhD, from the University of Southampton (England), asked whether the neutropenia seen in the study was related to myeloid expression of the target of from the off-target deconjugated payload.
“I don’t know that I necessarily have the answer to that,” Dr. Levy replied. “Remember there is the CD20 monoclonal rituximab which we know can cause neutropenia, as well as the CD37 and the target payload. I don’t know if we have enough information to attribute it to one specific component of the therapy,” he said.
The study was funded by Debiopharm International. Dr. Levy disclosed speaker activities for multiple companies, not including Debiopharm. Dr. Lei and Dr. Davies had no disclosures relevant to the study.
Patients with relapsed or refractory B-cell non-Hodgkin lymphomas who are not candidates for hematopoietic stem cell transplant have a generally poor prognosis and few treatment options, but an experimental combination of the antibody-drug conjugate naratuximab with rituximab showed promising efficacy and acceptable safety in these patients in a phase 2 trial.
Among patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL) the combination was associated with a 44.7% overall response rate, including 31.6% complete responses, and two-thirds of patients had responses lasting more than 12 months, reported Moshe Yair Levy, MD, from Texas Oncology–Baylor Charles A Sammons Cancer Center in Dallas.
“This is, in my viewpoint, very exciting therapy,” he said in a question-and-answer session following his presentation of the data in a late-breaking abstract session during the European Hematology Association annual congress. (Abstract LB1903).
Naratuximab emtansine is an investigational antibody-drug conjugate (ADC) consisting of a humanized monoclonal antibody against CD37, a surface marker on B lymphocytes that is highly expressed in non-Hodgkin lymphoma (NHL), conjugated to a cytotoxic derivative of maitansine.
CD37 is also an internalizable cell-surface antigen, making it an attractive candidate for an ADC approach.
In a phase 1 trial, naratuximab monotherapy showed a good safety profile and a 22% overall response rate, Dr. Levy noted.
“What they found is that, if you coadminister this ADC with rituximab, you’re actually going to get more internalization of the CD37 monoclonal, therefore more payload delivered to your target cells,” he said.
He reported results of a multicenter, adaptive phase 2 study of the combination in patients with DLBCL and other relapsed/refractory NHL.
DLBCL and others
The trial was divided into two parts, with the first consisting of a safety run-in phase with expansion in patients with confirmed diagnoses of relapsed/refractory NHL, including DLBCL, follicular lymphoma, mantle cell lymphoma, and marginal zone lymphoma.
Patients with double- or triple-hit disease (with translocations in MYC plus either BCL2 and/or BCL6), bulky disease, or transformed lymphoma were eligible.
The second part consisted of two cohorts of patients with DLBCL treated with naratuximab and rituximab either weekly or every 3 weeks.
All patients in the study had received one to six prior lines of therapy, and had Eastern Cooperative Oncology Group performance status of 0-2. Patients with CNS lymphomas or prior anti-CD37 targeting therapy were excluded.
The safety population included 50 patients with DLBCL assigned to therapy every 3 weeks, 30 assigned to weekly therapy, and 20 patients with other NHL.
DLBCL efficacy
A total of 76 patients with DLBCL were evaluable for efficacy.
The ORR was 44% for patients in both the weekly and every 3 week cohorts, with 31.6% having complete responses.
Among 61 patients with nonbulky disease (longest diameter 7.5 cm or less), the ORR was 50.8%, and among 28 patients who had three or more prior lines of therapy the ORR was 46.4%, with 32.1% having a complete response.
Among responders followed for a median of 15 months, the median duration of response was not reached, and 66% had responses lasting beyond 12 months.
In the weekly dosing DLBCL cohort, 53.3% of patients discontinued treatment of both study drugs because of disease progression, as did 58% of those in the every 3 week cohort, and 30% of patients with other lymphomas. Only eight patients discontinued the combination because of treatment-emergent adverse events. Six patients had treatment-emergent adverse events leading to naratuximab dose reduction.
The most common grade 3 or 4 adverse events were neutropenia, leukopenia, lymphopenia and thrombocytopenias. Dr. Levy commented that the use of granulocyte colony-stimulating factor, which was not mandatory in the study, would likely have lowered the incidence of cytopenias.
There were 10 deaths during the study, 2 of which were considered to be treatment related, occurring in 1 patient each in the DLBCL dosing cohorts; 1 of the patients died from pneumonitis, and the other from left ventricular heart failure.
Other patients deaths were attributed to non–treatment-related cardiac arrest, acute renal failure, exacerbation of chronic heart failure, respiratory failure, multiorgan failure, lung infection, or colon adenocarcinoma.
Q 3 weeks suffices
In the question-and-answer session following the presentation, Kenny Lei, MD, from the Chinese University of Hong Kong asked Dr. Levy what the half-life of naratuximab is, and what was the investigator’s rationale for testing a weekly dosing schedule.
“I think the reason they checked the two different regimens, the Q week and the Q 3-week group, is that they noted that [naratuximab] was cleared relatively quickly, and they wanted to see whether or not, by giving Q weekly, when you get a continuous CD37 site occupancy if they would have a better outcome. But as you saw, in the groups there was really no clinically relevant difference in outcome,” Dr. Levy said.
Andrew Davies, MD, PhD, from the University of Southampton (England), asked whether the neutropenia seen in the study was related to myeloid expression of the target of from the off-target deconjugated payload.
“I don’t know that I necessarily have the answer to that,” Dr. Levy replied. “Remember there is the CD20 monoclonal rituximab which we know can cause neutropenia, as well as the CD37 and the target payload. I don’t know if we have enough information to attribute it to one specific component of the therapy,” he said.
The study was funded by Debiopharm International. Dr. Levy disclosed speaker activities for multiple companies, not including Debiopharm. Dr. Lei and Dr. Davies had no disclosures relevant to the study.
FROM EHA 2021
Choosing the right R-CHOP dosage for elderly patients with DLBCL
Physicians often face the choice of whether to treat elderly patients with diffuse large B-cell lymphoma (DLBCL) with a full or reduced dose intensity (DI) of R-CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisolone + rituximab), according to Edward J. Bataillard of the Imperial College Healthcare National Health Service Trust, London, and colleagues.
To address this issue, the researchers conducted a systematic review assessing the impact of R-CHOP DI on DLBCL survival outcomes, according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Protocols (PRISMA-P) guidelines. They found that greater than 80 years of age is an important cutoff for treating patients with a reduced R-CHOP dosage, according to their results, published in Blood Advances (2021;5[9]:2426-37).
Cutoff at 80 years of age
Their final review comprised 13 studies including 5,188 patients. Overall, the lower DI (intended or relative) was associated with inferior survival in seven of nine studies reporting crude survival analyses. In addition, most studies and those larger studies of higher quality showed poorer outcomes associated with reduced R-CHOP DI.
However, in subgroups of patients aged 80 years or more, survival was not consistently affected by the use of lower dosage R-CHOP, according to the researchers.
“We found evidence of improved survival with higher RDIs (up to R-CHOP-21) in those aged < 80 years, but the literature to date does not support full-dose intensity in those 80 years [or older],” they stated.
However, the researchers concluded that: “In the absence of improved options beyond R-CHOP in DLBCL over the past 20 years, prospective studies of DI are warranted, despite the recognized challenges involved.”
Two of the authors reported being previously employed by Roche. A third served as a consultant and adviser and received honoraria from Roche and other pharmaceutical companies. Several authors reported disclosures related to multiple other pharmaceutical companies.
Physicians often face the choice of whether to treat elderly patients with diffuse large B-cell lymphoma (DLBCL) with a full or reduced dose intensity (DI) of R-CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisolone + rituximab), according to Edward J. Bataillard of the Imperial College Healthcare National Health Service Trust, London, and colleagues.
To address this issue, the researchers conducted a systematic review assessing the impact of R-CHOP DI on DLBCL survival outcomes, according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Protocols (PRISMA-P) guidelines. They found that greater than 80 years of age is an important cutoff for treating patients with a reduced R-CHOP dosage, according to their results, published in Blood Advances (2021;5[9]:2426-37).
Cutoff at 80 years of age
Their final review comprised 13 studies including 5,188 patients. Overall, the lower DI (intended or relative) was associated with inferior survival in seven of nine studies reporting crude survival analyses. In addition, most studies and those larger studies of higher quality showed poorer outcomes associated with reduced R-CHOP DI.
However, in subgroups of patients aged 80 years or more, survival was not consistently affected by the use of lower dosage R-CHOP, according to the researchers.
“We found evidence of improved survival with higher RDIs (up to R-CHOP-21) in those aged < 80 years, but the literature to date does not support full-dose intensity in those 80 years [or older],” they stated.
However, the researchers concluded that: “In the absence of improved options beyond R-CHOP in DLBCL over the past 20 years, prospective studies of DI are warranted, despite the recognized challenges involved.”
Two of the authors reported being previously employed by Roche. A third served as a consultant and adviser and received honoraria from Roche and other pharmaceutical companies. Several authors reported disclosures related to multiple other pharmaceutical companies.
Physicians often face the choice of whether to treat elderly patients with diffuse large B-cell lymphoma (DLBCL) with a full or reduced dose intensity (DI) of R-CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisolone + rituximab), according to Edward J. Bataillard of the Imperial College Healthcare National Health Service Trust, London, and colleagues.
To address this issue, the researchers conducted a systematic review assessing the impact of R-CHOP DI on DLBCL survival outcomes, according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Protocols (PRISMA-P) guidelines. They found that greater than 80 years of age is an important cutoff for treating patients with a reduced R-CHOP dosage, according to their results, published in Blood Advances (2021;5[9]:2426-37).
Cutoff at 80 years of age
Their final review comprised 13 studies including 5,188 patients. Overall, the lower DI (intended or relative) was associated with inferior survival in seven of nine studies reporting crude survival analyses. In addition, most studies and those larger studies of higher quality showed poorer outcomes associated with reduced R-CHOP DI.
However, in subgroups of patients aged 80 years or more, survival was not consistently affected by the use of lower dosage R-CHOP, according to the researchers.
“We found evidence of improved survival with higher RDIs (up to R-CHOP-21) in those aged < 80 years, but the literature to date does not support full-dose intensity in those 80 years [or older],” they stated.
However, the researchers concluded that: “In the absence of improved options beyond R-CHOP in DLBCL over the past 20 years, prospective studies of DI are warranted, despite the recognized challenges involved.”
Two of the authors reported being previously employed by Roche. A third served as a consultant and adviser and received honoraria from Roche and other pharmaceutical companies. Several authors reported disclosures related to multiple other pharmaceutical companies.
FROM BLOOD ADVANCES
High-dose methotrexate of no CNS benefit for patients with high-risk DLBCL
Patients with high-risk diffuse large B-cell lymphoma (DLBCL) have a greater than 10% risk of central nervous system (CNS) relapse, and the use of prophylactic high-dose methotrexate (HD-MTX) has been proposed as a preventative measure.
However, the use of prophylactic HD-MTX did not improve CNS or survival outcomes of patients with high-risk DLBCL, but instead was associated with increased toxicities, according to the results of a retrospective study by Hyehyun Jeong, MD, of University of Ulsan College of Medicine, Seoul, Republic of Korea, and colleagues.
The researchers evaluated the effects of prophylactic HD-MTX on CNS relapse and survival outcomes in newly diagnosed R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone)–treated patients with high-risk DLBCL. The assessment was based on the initial treatment intent (ITT) of the physician on the use of prophylactic HD-MTX.
A total of 5,130 patients were classified into an ITT HD-MTX group and an equal number into a non-ITT HD-MTX group, according to the report, published online in Blood Advances.
Equivalent results
The study showed that the CNS relapse rate was not significantly different between the two groups, with 2-year CNS relapse rates of 12.4% and 13.9%, respectively (P = .96). Three-year progression-free survival and overall survival rates in the ITT HD-MTX and non-ITT HD-MTX groups were 62.4% vs. 64.5% (P = .94) and 71.7% vs. 71.4% (P = .7), respectively. In addition, the propensity score–matched analyses showed no significant differences in the time-to-CNS relapse, progression-free survival, or overall survival, according to the researchers.
One key concern, however, was the increase in toxicity seen in the HD-MTX group. In this study, the ITT HD-MTX group had a statistically higher incidence of grade 3/4 oral mucositis and elevated alanine aminotransferase (ALT) levels, a marker for liver damage. In addition, the ITT HD-MTX group tended to have a higher incidence of elevated creatinine levels during treatment compared with the non-ITT HD-MTX group.
The HD-MTX group also showed a more common treatment delay or a dose reduction in R-CHOP, which might be attributable to toxicities related to intercalated HD-MTX treatments between R-CHOP cycles, the researchers suggested, potentially resulting in a reduced dose intensity of R-CHOP that could play a role in the lack of an observed survival benefit with additional HD-MTX.
“Another vital issue to consider is that HD-MTX treatment requires hospitalization because intensive hydration and leucovorin rescue is needed, which increases the medical costs,” the authors added.
“This real-world experience, which is unique in its scope and analytical methods, should provide insightful information on the role of HD-MTX prophylaxis to help guide current practice, given the lack of prospective clinical evidence in this patient population,” the researchers concluded.
The authors reported that they had no competing financial interests.
Patients with high-risk diffuse large B-cell lymphoma (DLBCL) have a greater than 10% risk of central nervous system (CNS) relapse, and the use of prophylactic high-dose methotrexate (HD-MTX) has been proposed as a preventative measure.
However, the use of prophylactic HD-MTX did not improve CNS or survival outcomes of patients with high-risk DLBCL, but instead was associated with increased toxicities, according to the results of a retrospective study by Hyehyun Jeong, MD, of University of Ulsan College of Medicine, Seoul, Republic of Korea, and colleagues.
The researchers evaluated the effects of prophylactic HD-MTX on CNS relapse and survival outcomes in newly diagnosed R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone)–treated patients with high-risk DLBCL. The assessment was based on the initial treatment intent (ITT) of the physician on the use of prophylactic HD-MTX.
A total of 5,130 patients were classified into an ITT HD-MTX group and an equal number into a non-ITT HD-MTX group, according to the report, published online in Blood Advances.
Equivalent results
The study showed that the CNS relapse rate was not significantly different between the two groups, with 2-year CNS relapse rates of 12.4% and 13.9%, respectively (P = .96). Three-year progression-free survival and overall survival rates in the ITT HD-MTX and non-ITT HD-MTX groups were 62.4% vs. 64.5% (P = .94) and 71.7% vs. 71.4% (P = .7), respectively. In addition, the propensity score–matched analyses showed no significant differences in the time-to-CNS relapse, progression-free survival, or overall survival, according to the researchers.
One key concern, however, was the increase in toxicity seen in the HD-MTX group. In this study, the ITT HD-MTX group had a statistically higher incidence of grade 3/4 oral mucositis and elevated alanine aminotransferase (ALT) levels, a marker for liver damage. In addition, the ITT HD-MTX group tended to have a higher incidence of elevated creatinine levels during treatment compared with the non-ITT HD-MTX group.
The HD-MTX group also showed a more common treatment delay or a dose reduction in R-CHOP, which might be attributable to toxicities related to intercalated HD-MTX treatments between R-CHOP cycles, the researchers suggested, potentially resulting in a reduced dose intensity of R-CHOP that could play a role in the lack of an observed survival benefit with additional HD-MTX.
“Another vital issue to consider is that HD-MTX treatment requires hospitalization because intensive hydration and leucovorin rescue is needed, which increases the medical costs,” the authors added.
“This real-world experience, which is unique in its scope and analytical methods, should provide insightful information on the role of HD-MTX prophylaxis to help guide current practice, given the lack of prospective clinical evidence in this patient population,” the researchers concluded.
The authors reported that they had no competing financial interests.
Patients with high-risk diffuse large B-cell lymphoma (DLBCL) have a greater than 10% risk of central nervous system (CNS) relapse, and the use of prophylactic high-dose methotrexate (HD-MTX) has been proposed as a preventative measure.
However, the use of prophylactic HD-MTX did not improve CNS or survival outcomes of patients with high-risk DLBCL, but instead was associated with increased toxicities, according to the results of a retrospective study by Hyehyun Jeong, MD, of University of Ulsan College of Medicine, Seoul, Republic of Korea, and colleagues.
The researchers evaluated the effects of prophylactic HD-MTX on CNS relapse and survival outcomes in newly diagnosed R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone)–treated patients with high-risk DLBCL. The assessment was based on the initial treatment intent (ITT) of the physician on the use of prophylactic HD-MTX.
A total of 5,130 patients were classified into an ITT HD-MTX group and an equal number into a non-ITT HD-MTX group, according to the report, published online in Blood Advances.
Equivalent results
The study showed that the CNS relapse rate was not significantly different between the two groups, with 2-year CNS relapse rates of 12.4% and 13.9%, respectively (P = .96). Three-year progression-free survival and overall survival rates in the ITT HD-MTX and non-ITT HD-MTX groups were 62.4% vs. 64.5% (P = .94) and 71.7% vs. 71.4% (P = .7), respectively. In addition, the propensity score–matched analyses showed no significant differences in the time-to-CNS relapse, progression-free survival, or overall survival, according to the researchers.
One key concern, however, was the increase in toxicity seen in the HD-MTX group. In this study, the ITT HD-MTX group had a statistically higher incidence of grade 3/4 oral mucositis and elevated alanine aminotransferase (ALT) levels, a marker for liver damage. In addition, the ITT HD-MTX group tended to have a higher incidence of elevated creatinine levels during treatment compared with the non-ITT HD-MTX group.
The HD-MTX group also showed a more common treatment delay or a dose reduction in R-CHOP, which might be attributable to toxicities related to intercalated HD-MTX treatments between R-CHOP cycles, the researchers suggested, potentially resulting in a reduced dose intensity of R-CHOP that could play a role in the lack of an observed survival benefit with additional HD-MTX.
“Another vital issue to consider is that HD-MTX treatment requires hospitalization because intensive hydration and leucovorin rescue is needed, which increases the medical costs,” the authors added.
“This real-world experience, which is unique in its scope and analytical methods, should provide insightful information on the role of HD-MTX prophylaxis to help guide current practice, given the lack of prospective clinical evidence in this patient population,” the researchers concluded.
The authors reported that they had no competing financial interests.
FROM BLOOD ADVANCES