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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.
ASH studies look at racial disparities in ALL care, outcomes
Among almost 25,000 children and young adults up to 31 years old, all of whom participated in Children’s Oncology Group studies since 2004, 5-year event free survival (EFS) was 87.4% for White patients, 82.8% for Hispanic patients, and 81.9% for Black patients.
When socioeconomics and disease characteristics such as CNS involvement, white blood cell lineage, and induction status were taken into account, the risk of having a survival event fell from 37% to 11% higher for Hispanic patients versus White patients but from 45% to 32% for Black patients versus White patients.
However, there was no explicit adjustment in the study for acuity at presentation, body mass index, adherence to protocols, or Philadelphia chromosome (PH)-like disease, which is more common among Hispanic patients.
Even so, lead investigator Sumit Gupta, MD, a pediatric blood cancer specialist at the University of Toronto, said that even with the potential confounders, lingering differences in outcomes raise questions about equal access to care and other matters, and suggest that there are still “uncomfortable things to consider, things like ... structural racism” and a system that delivers “systemically different care to patients across racial” groups.
Another report presented at the meeting with 295 patients 18-40 years old found that Hispanic patients had 3-year overall survival comparable to that of White patients despite a higher prevalence of PH-like disease, perhaps because Hispanic patients had higher treatment adherence than did White patients at 76% versus 56%, said lead investigator Lori Muffly, MD, a bone and marrow transplant specialist at Stanford (Calif.) University.
However, Hispanic ALL patients were underrepresented in the study because the investigators didn’t recruit in Texas and Florida, states with higher percentages of young Hispanic ALL patients, and recruitment in California fell short of the prevalence of young Hispanic patients in that state. The work was a substudy of CALGB 10403, a trial of pediatric regimens in adolescents and young adults.
“It’s a relatively easy maneuver, going to where the patients are. When groups are thinking about multicenter trials, it has to be part of the dialogue from the beginning,” Dr. Muffly said.
Black patients in the review had fewer days in treatment and a higher prevalence of T-cell disease, and didn’t do as well as other groups.
Together, the studies “offer insight into the magnitude of racial and ethnic disparities in care among young people with” ALL, said Mikkael Sekeres, MD, chief of the division of hematology at the University of Miami, who moderated the presentations.
Dr. Gupta and his team found outcome differences only in relapsed B-cell ALL, not T-cell disease. B-cell disease has a more rigorous maintenance schedule, so it could be that there’s a difference in sticking to follow-up between various groups or less rigorous monitoring by pediatric oncologists in some groups, he said.
Dr. Gupta’s study was funded by the National Cancer Institute and others. Dr. Muffly didn’t report a funding source, but reported ties to Pfizer, Amgen, and other companies. Dr. Gupta is involved with Jazz Pharmaceuticals.
Among almost 25,000 children and young adults up to 31 years old, all of whom participated in Children’s Oncology Group studies since 2004, 5-year event free survival (EFS) was 87.4% for White patients, 82.8% for Hispanic patients, and 81.9% for Black patients.
When socioeconomics and disease characteristics such as CNS involvement, white blood cell lineage, and induction status were taken into account, the risk of having a survival event fell from 37% to 11% higher for Hispanic patients versus White patients but from 45% to 32% for Black patients versus White patients.
However, there was no explicit adjustment in the study for acuity at presentation, body mass index, adherence to protocols, or Philadelphia chromosome (PH)-like disease, which is more common among Hispanic patients.
Even so, lead investigator Sumit Gupta, MD, a pediatric blood cancer specialist at the University of Toronto, said that even with the potential confounders, lingering differences in outcomes raise questions about equal access to care and other matters, and suggest that there are still “uncomfortable things to consider, things like ... structural racism” and a system that delivers “systemically different care to patients across racial” groups.
Another report presented at the meeting with 295 patients 18-40 years old found that Hispanic patients had 3-year overall survival comparable to that of White patients despite a higher prevalence of PH-like disease, perhaps because Hispanic patients had higher treatment adherence than did White patients at 76% versus 56%, said lead investigator Lori Muffly, MD, a bone and marrow transplant specialist at Stanford (Calif.) University.
However, Hispanic ALL patients were underrepresented in the study because the investigators didn’t recruit in Texas and Florida, states with higher percentages of young Hispanic ALL patients, and recruitment in California fell short of the prevalence of young Hispanic patients in that state. The work was a substudy of CALGB 10403, a trial of pediatric regimens in adolescents and young adults.
“It’s a relatively easy maneuver, going to where the patients are. When groups are thinking about multicenter trials, it has to be part of the dialogue from the beginning,” Dr. Muffly said.
Black patients in the review had fewer days in treatment and a higher prevalence of T-cell disease, and didn’t do as well as other groups.
Together, the studies “offer insight into the magnitude of racial and ethnic disparities in care among young people with” ALL, said Mikkael Sekeres, MD, chief of the division of hematology at the University of Miami, who moderated the presentations.
Dr. Gupta and his team found outcome differences only in relapsed B-cell ALL, not T-cell disease. B-cell disease has a more rigorous maintenance schedule, so it could be that there’s a difference in sticking to follow-up between various groups or less rigorous monitoring by pediatric oncologists in some groups, he said.
Dr. Gupta’s study was funded by the National Cancer Institute and others. Dr. Muffly didn’t report a funding source, but reported ties to Pfizer, Amgen, and other companies. Dr. Gupta is involved with Jazz Pharmaceuticals.
Among almost 25,000 children and young adults up to 31 years old, all of whom participated in Children’s Oncology Group studies since 2004, 5-year event free survival (EFS) was 87.4% for White patients, 82.8% for Hispanic patients, and 81.9% for Black patients.
When socioeconomics and disease characteristics such as CNS involvement, white blood cell lineage, and induction status were taken into account, the risk of having a survival event fell from 37% to 11% higher for Hispanic patients versus White patients but from 45% to 32% for Black patients versus White patients.
However, there was no explicit adjustment in the study for acuity at presentation, body mass index, adherence to protocols, or Philadelphia chromosome (PH)-like disease, which is more common among Hispanic patients.
Even so, lead investigator Sumit Gupta, MD, a pediatric blood cancer specialist at the University of Toronto, said that even with the potential confounders, lingering differences in outcomes raise questions about equal access to care and other matters, and suggest that there are still “uncomfortable things to consider, things like ... structural racism” and a system that delivers “systemically different care to patients across racial” groups.
Another report presented at the meeting with 295 patients 18-40 years old found that Hispanic patients had 3-year overall survival comparable to that of White patients despite a higher prevalence of PH-like disease, perhaps because Hispanic patients had higher treatment adherence than did White patients at 76% versus 56%, said lead investigator Lori Muffly, MD, a bone and marrow transplant specialist at Stanford (Calif.) University.
However, Hispanic ALL patients were underrepresented in the study because the investigators didn’t recruit in Texas and Florida, states with higher percentages of young Hispanic ALL patients, and recruitment in California fell short of the prevalence of young Hispanic patients in that state. The work was a substudy of CALGB 10403, a trial of pediatric regimens in adolescents and young adults.
“It’s a relatively easy maneuver, going to where the patients are. When groups are thinking about multicenter trials, it has to be part of the dialogue from the beginning,” Dr. Muffly said.
Black patients in the review had fewer days in treatment and a higher prevalence of T-cell disease, and didn’t do as well as other groups.
Together, the studies “offer insight into the magnitude of racial and ethnic disparities in care among young people with” ALL, said Mikkael Sekeres, MD, chief of the division of hematology at the University of Miami, who moderated the presentations.
Dr. Gupta and his team found outcome differences only in relapsed B-cell ALL, not T-cell disease. B-cell disease has a more rigorous maintenance schedule, so it could be that there’s a difference in sticking to follow-up between various groups or less rigorous monitoring by pediatric oncologists in some groups, he said.
Dr. Gupta’s study was funded by the National Cancer Institute and others. Dr. Muffly didn’t report a funding source, but reported ties to Pfizer, Amgen, and other companies. Dr. Gupta is involved with Jazz Pharmaceuticals.
FROM ASH 2021
TKI/BiTE combo extends survival of older patients with Ph+ALL
ATLANTA – Older patients with acute lymphoblastic leukemia positive for the Philadelphia chromosome (Ph+ALL) are often not fit enough to withstand intensive chemotherapy and stem cell transplants, but remissions with alternative therapies are usually short lived.
Now, results from an ongoing study suggest that the combination of the
The new results were reported by investigators in the SWOG Cancer Research Network and come from a cohort of 25 patients with a median age of 73 years with newly diagnosed Ph+ALL or ALL with dasatinib-sensitive fusions of mutations (Ph-like ALL).
Nearly all (23 of 25 patients, 92%) had complete remissions, and 5 of 16 patients for whom minimal residual disease (MRD) data were available were MRD negative at day 28, said Anjali Advani, MD, from the Cleveland Clinic.
At a median follow-up of 1.7 years, the estimated 3-year disease-free survival rate was 80%, and the estimated overall survival rate was 85%, the investigators reported in a poster presentation at the annual meeting of the American Society of Hematology.
“I think the biggest question will be longer-term follow-up. We clearly see high remission rates in this population, but the issue is whether in these elderly patients who are not candidates for chemo we can prolong remission by the addition of other treatments, such as blinatumomab,” she said in an interview with this news organization.
“The follow-up is reasonable at this point, and as we get longer follow-up, if the current 3-year survival estimates hold up, that would be very encouraging,” she said.
Early promise
A leukemia specialist who was not involved in the study told this news organization that the results are promising, but added that it’s too early to make definitive judgments about the efficacy of the combination.
“People have used just a tyrosine kinase inhibitor and prednisone in these patients and gotten remissions, but they just don’t last,” said Peter Emanuel, MD, from CHI St. Vincent Infirmary in Little Rock, Ark.
“The promise with this approach is that you’re getting a longer-lasting remission – maybe not a cure, but a longer-lasting remission – without having to use intensive chemotherapy,” he said.
“It’s still a pretty small study, so I think this is going to require a bigger trial, looking at more patients, but it’s certainly very encouraging and very promising,” he added.
Hanno Hock, MD, PhD, a leukemia researcher at the Mass General Cancer Center in Boston, said in an interview that “the whole idea here is to add this newer agent, blinatumomab, to make those good initial responses more durable, and it looks like it is able to do that with very impressive initial data,” he said.
“The caveat is that this is still early, and one needs to wait and see how it all pans out, but it’s very well tolerated, and definitely the next logical step in trying to offer something to people who cannot tolerate more aggressive therapy such as transplant,” Dr. Hock added.
Study results
The new results come from a feasibility cohort of patients enrolled in the SWOG S1318 trial, which studied blinatumomab plus chemotherapy and prednisone in older patients with Ph-ALL, as well as blinatumomab, dasatinib, and prednisone in older adults with Ph+ ALL.
Patients 65 and older with newly diagnosed or relapsed/refractory Ph+ALL or Ph-like ALL and no central nervous system disease were eligible for the arm of the trial described here. All patients with data reported in this analysis had newly diagnosed ALL.
Patients first received a single induction cycle of dasatinib and prednisone and were then evaluated for response. Patients with a complete remission (CR) or CR with incomplete recovery of blood counts (CRi) would then undergo prednisone tapering while continuing dasatinib until day 84. Patients without a CR or CRi at day 28 who had remissions by day 56 then also continued dasatinib until day 84.
Those patients still in remission at day 84 went on to three cycles of blinatumomab and dasatinib, followed by dasatinib and prednisone maintenance until unacceptable toxicity or disease progression. Patients may remain on maintenance for up to 10 years after registration.
Patients who do not have a CR or CRi by day 84 can receive reinduction with up to two total cycles of blinatumomab, with those who get a remission moving on to the blinatumomab/ dasatinib combination and those who do not going off protocol.
Of the 25 patients, 23 had a CR following dasatinib/prednisone induction. As noted, 5 of 16 patients evaluable for MRD were MRD negative.
Four patients did not receive postremission therapy, two because of adverse events, one who went on to transplant, and one because of insurance issues.
In a safety review early in the study, 4 of 12 evaluable patients were found to have dose-limiting toxicities, including one case each of grade 3 dyspnea and gastrointestinal pain (in a single patient), hypertension, dyspnea, and hyperglycemia.
These adverse events were deemed acceptable by both U.S. Food and Drug Administration and National Cancer Institute reviewers, and this arm of the study was allowed to continue, Dr. Advani noted.
The study was funded by grants from the National Institutes of Health. Dr. Advani disclosed financial relationships with several companies. Dr. Emanuel and Dr. Hock have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
ATLANTA – Older patients with acute lymphoblastic leukemia positive for the Philadelphia chromosome (Ph+ALL) are often not fit enough to withstand intensive chemotherapy and stem cell transplants, but remissions with alternative therapies are usually short lived.
Now, results from an ongoing study suggest that the combination of the
The new results were reported by investigators in the SWOG Cancer Research Network and come from a cohort of 25 patients with a median age of 73 years with newly diagnosed Ph+ALL or ALL with dasatinib-sensitive fusions of mutations (Ph-like ALL).
Nearly all (23 of 25 patients, 92%) had complete remissions, and 5 of 16 patients for whom minimal residual disease (MRD) data were available were MRD negative at day 28, said Anjali Advani, MD, from the Cleveland Clinic.
At a median follow-up of 1.7 years, the estimated 3-year disease-free survival rate was 80%, and the estimated overall survival rate was 85%, the investigators reported in a poster presentation at the annual meeting of the American Society of Hematology.
“I think the biggest question will be longer-term follow-up. We clearly see high remission rates in this population, but the issue is whether in these elderly patients who are not candidates for chemo we can prolong remission by the addition of other treatments, such as blinatumomab,” she said in an interview with this news organization.
“The follow-up is reasonable at this point, and as we get longer follow-up, if the current 3-year survival estimates hold up, that would be very encouraging,” she said.
Early promise
A leukemia specialist who was not involved in the study told this news organization that the results are promising, but added that it’s too early to make definitive judgments about the efficacy of the combination.
“People have used just a tyrosine kinase inhibitor and prednisone in these patients and gotten remissions, but they just don’t last,” said Peter Emanuel, MD, from CHI St. Vincent Infirmary in Little Rock, Ark.
“The promise with this approach is that you’re getting a longer-lasting remission – maybe not a cure, but a longer-lasting remission – without having to use intensive chemotherapy,” he said.
“It’s still a pretty small study, so I think this is going to require a bigger trial, looking at more patients, but it’s certainly very encouraging and very promising,” he added.
Hanno Hock, MD, PhD, a leukemia researcher at the Mass General Cancer Center in Boston, said in an interview that “the whole idea here is to add this newer agent, blinatumomab, to make those good initial responses more durable, and it looks like it is able to do that with very impressive initial data,” he said.
“The caveat is that this is still early, and one needs to wait and see how it all pans out, but it’s very well tolerated, and definitely the next logical step in trying to offer something to people who cannot tolerate more aggressive therapy such as transplant,” Dr. Hock added.
Study results
The new results come from a feasibility cohort of patients enrolled in the SWOG S1318 trial, which studied blinatumomab plus chemotherapy and prednisone in older patients with Ph-ALL, as well as blinatumomab, dasatinib, and prednisone in older adults with Ph+ ALL.
Patients 65 and older with newly diagnosed or relapsed/refractory Ph+ALL or Ph-like ALL and no central nervous system disease were eligible for the arm of the trial described here. All patients with data reported in this analysis had newly diagnosed ALL.
Patients first received a single induction cycle of dasatinib and prednisone and were then evaluated for response. Patients with a complete remission (CR) or CR with incomplete recovery of blood counts (CRi) would then undergo prednisone tapering while continuing dasatinib until day 84. Patients without a CR or CRi at day 28 who had remissions by day 56 then also continued dasatinib until day 84.
Those patients still in remission at day 84 went on to three cycles of blinatumomab and dasatinib, followed by dasatinib and prednisone maintenance until unacceptable toxicity or disease progression. Patients may remain on maintenance for up to 10 years after registration.
Patients who do not have a CR or CRi by day 84 can receive reinduction with up to two total cycles of blinatumomab, with those who get a remission moving on to the blinatumomab/ dasatinib combination and those who do not going off protocol.
Of the 25 patients, 23 had a CR following dasatinib/prednisone induction. As noted, 5 of 16 patients evaluable for MRD were MRD negative.
Four patients did not receive postremission therapy, two because of adverse events, one who went on to transplant, and one because of insurance issues.
In a safety review early in the study, 4 of 12 evaluable patients were found to have dose-limiting toxicities, including one case each of grade 3 dyspnea and gastrointestinal pain (in a single patient), hypertension, dyspnea, and hyperglycemia.
These adverse events were deemed acceptable by both U.S. Food and Drug Administration and National Cancer Institute reviewers, and this arm of the study was allowed to continue, Dr. Advani noted.
The study was funded by grants from the National Institutes of Health. Dr. Advani disclosed financial relationships with several companies. Dr. Emanuel and Dr. Hock have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
ATLANTA – Older patients with acute lymphoblastic leukemia positive for the Philadelphia chromosome (Ph+ALL) are often not fit enough to withstand intensive chemotherapy and stem cell transplants, but remissions with alternative therapies are usually short lived.
Now, results from an ongoing study suggest that the combination of the
The new results were reported by investigators in the SWOG Cancer Research Network and come from a cohort of 25 patients with a median age of 73 years with newly diagnosed Ph+ALL or ALL with dasatinib-sensitive fusions of mutations (Ph-like ALL).
Nearly all (23 of 25 patients, 92%) had complete remissions, and 5 of 16 patients for whom minimal residual disease (MRD) data were available were MRD negative at day 28, said Anjali Advani, MD, from the Cleveland Clinic.
At a median follow-up of 1.7 years, the estimated 3-year disease-free survival rate was 80%, and the estimated overall survival rate was 85%, the investigators reported in a poster presentation at the annual meeting of the American Society of Hematology.
“I think the biggest question will be longer-term follow-up. We clearly see high remission rates in this population, but the issue is whether in these elderly patients who are not candidates for chemo we can prolong remission by the addition of other treatments, such as blinatumomab,” she said in an interview with this news organization.
“The follow-up is reasonable at this point, and as we get longer follow-up, if the current 3-year survival estimates hold up, that would be very encouraging,” she said.
Early promise
A leukemia specialist who was not involved in the study told this news organization that the results are promising, but added that it’s too early to make definitive judgments about the efficacy of the combination.
“People have used just a tyrosine kinase inhibitor and prednisone in these patients and gotten remissions, but they just don’t last,” said Peter Emanuel, MD, from CHI St. Vincent Infirmary in Little Rock, Ark.
“The promise with this approach is that you’re getting a longer-lasting remission – maybe not a cure, but a longer-lasting remission – without having to use intensive chemotherapy,” he said.
“It’s still a pretty small study, so I think this is going to require a bigger trial, looking at more patients, but it’s certainly very encouraging and very promising,” he added.
Hanno Hock, MD, PhD, a leukemia researcher at the Mass General Cancer Center in Boston, said in an interview that “the whole idea here is to add this newer agent, blinatumomab, to make those good initial responses more durable, and it looks like it is able to do that with very impressive initial data,” he said.
“The caveat is that this is still early, and one needs to wait and see how it all pans out, but it’s very well tolerated, and definitely the next logical step in trying to offer something to people who cannot tolerate more aggressive therapy such as transplant,” Dr. Hock added.
Study results
The new results come from a feasibility cohort of patients enrolled in the SWOG S1318 trial, which studied blinatumomab plus chemotherapy and prednisone in older patients with Ph-ALL, as well as blinatumomab, dasatinib, and prednisone in older adults with Ph+ ALL.
Patients 65 and older with newly diagnosed or relapsed/refractory Ph+ALL or Ph-like ALL and no central nervous system disease were eligible for the arm of the trial described here. All patients with data reported in this analysis had newly diagnosed ALL.
Patients first received a single induction cycle of dasatinib and prednisone and were then evaluated for response. Patients with a complete remission (CR) or CR with incomplete recovery of blood counts (CRi) would then undergo prednisone tapering while continuing dasatinib until day 84. Patients without a CR or CRi at day 28 who had remissions by day 56 then also continued dasatinib until day 84.
Those patients still in remission at day 84 went on to three cycles of blinatumomab and dasatinib, followed by dasatinib and prednisone maintenance until unacceptable toxicity or disease progression. Patients may remain on maintenance for up to 10 years after registration.
Patients who do not have a CR or CRi by day 84 can receive reinduction with up to two total cycles of blinatumomab, with those who get a remission moving on to the blinatumomab/ dasatinib combination and those who do not going off protocol.
Of the 25 patients, 23 had a CR following dasatinib/prednisone induction. As noted, 5 of 16 patients evaluable for MRD were MRD negative.
Four patients did not receive postremission therapy, two because of adverse events, one who went on to transplant, and one because of insurance issues.
In a safety review early in the study, 4 of 12 evaluable patients were found to have dose-limiting toxicities, including one case each of grade 3 dyspnea and gastrointestinal pain (in a single patient), hypertension, dyspnea, and hyperglycemia.
These adverse events were deemed acceptable by both U.S. Food and Drug Administration and National Cancer Institute reviewers, and this arm of the study was allowed to continue, Dr. Advani noted.
The study was funded by grants from the National Institutes of Health. Dr. Advani disclosed financial relationships with several companies. Dr. Emanuel and Dr. Hock have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
AT ASH 2021
For leukemias, COVID-19 death risks tied to poor prognoses, ICU deferrals
, results of an American Society of Hematology (ASH) COVID-19 registry study suggest.
Rates of severe COVID-19 were significantly higher among patients who had active disease or neutropenia at the time of their COVID-19 diagnosis. Mortality related to COVID-19 was linked to neutropenia, primary disease prognosis of less than 6 months, and deferral of recommended ICU care, study results show.
By contrast, mortality was not associated with active primary disease or its treatment, according to researcher Pinkal Desai, MD, MPH.
Taken together, these findings provide preliminary evidence to support the use of aggressive supportive treatment of COVID-19 in patients with acute leukemias and myelodysplastic syndromes, said Dr. Desai, a hematologist-oncologist with Weill Cornell Medicine and NewYork-Presbyterian in New York.
“If desired by patients, aggressive support for hospitalized patients with COVID-19 is appropriate, regardless of remission status, given the results of our study,” Dr. Desai said in a press conference during the annual meeting of the American Society of Hematology.
In non-cancer patient populations, advanced age and cytopenias have been associated with mortality related to COVID-19, Dr. Desai said. Likewise, patients with acute leukemias and myelodysplastic syndrome are generally older and have disease- or treatment-related cytopenias, which might affect the severity of and mortality from COVID-19, she added.
With that concern in mind, Dr. Desai and co-investigators looked at predictors of severe COVID-19 disease and death among patients in the ASH Research Collaborative (ASH RC) COVID-19 Registry for Hematology.
This registry was started in the early days of the pandemic to provide real-time observational COVID-19 data to clinicians, according to an ASH news release.
The analysis by Dr. Desai and co-authors included 257 patients with COVID-19 as determined by their physician, including 135 with a primary diagnosis of acute myeloid leukemia, 82 with acute lymphocytic leukemia, and 40 with myelodysplastic syndromes. Sixty percent of the patients were hospitalized due to COVID-19.
At the time of COVID-19 diagnosis, 46% of patients were in remission, and 44% had active disease, according to the report.
Both neutropenia and active disease status at COVID-19 diagnosis were linked to severe COVID-19, defined as ICU admission due to a COVID-19-related reason, according to results of multivariable analysis. Among patients with severe COVID-19, 67% had active disease, meaning just 33% were in remission, Dr. Desai noted.
In multivariable analysis, two factors were significantly associated with mortality, she added: having an estimated pre-COVID-19 prognosis from the primary disease of less than 6 months, and deferral of ICU care when it was recommended to the patient.
Mortality was 21% overall, higher than would be expected in a non-cancer population, Dr. Desai said. For patients with COVID-19 requiring hospitalization, the mortality rate was 34% and for those patients who did go to the ICU, the mortality rate was 68%.
By contrast, there was no significant association between mortality and active disease as compared to disease in remission, Dr. Desai noted in her presentation. Likewise, mortality was not associated with active treatment at the time of COVID-19 diagnosis as compared to no treatment.
Gwen Nichols, MD, executive vice president and chief medical officer of the Leukemia & Lymphoma Society, New York, said those are reassuring data for patients with acute leukemias and myelodysplastic syndromes and their healthcare providers.
“From our point of view, it helps us say, ‘do not stop your treatment because of worries about COVID-19—it’s more important that you treat your cancer,” Dr. Nichols said in an interview. “We now know we can help people through COVID-19, and I think this is just really important data to back that up,” she added.
Dr. Desai provided disclosures related to Agios, Kura Oncology, and Bristol Myers Squibb (consultancy), and to Janssen R&D and Astex (research funding).
, results of an American Society of Hematology (ASH) COVID-19 registry study suggest.
Rates of severe COVID-19 were significantly higher among patients who had active disease or neutropenia at the time of their COVID-19 diagnosis. Mortality related to COVID-19 was linked to neutropenia, primary disease prognosis of less than 6 months, and deferral of recommended ICU care, study results show.
By contrast, mortality was not associated with active primary disease or its treatment, according to researcher Pinkal Desai, MD, MPH.
Taken together, these findings provide preliminary evidence to support the use of aggressive supportive treatment of COVID-19 in patients with acute leukemias and myelodysplastic syndromes, said Dr. Desai, a hematologist-oncologist with Weill Cornell Medicine and NewYork-Presbyterian in New York.
“If desired by patients, aggressive support for hospitalized patients with COVID-19 is appropriate, regardless of remission status, given the results of our study,” Dr. Desai said in a press conference during the annual meeting of the American Society of Hematology.
In non-cancer patient populations, advanced age and cytopenias have been associated with mortality related to COVID-19, Dr. Desai said. Likewise, patients with acute leukemias and myelodysplastic syndrome are generally older and have disease- or treatment-related cytopenias, which might affect the severity of and mortality from COVID-19, she added.
With that concern in mind, Dr. Desai and co-investigators looked at predictors of severe COVID-19 disease and death among patients in the ASH Research Collaborative (ASH RC) COVID-19 Registry for Hematology.
This registry was started in the early days of the pandemic to provide real-time observational COVID-19 data to clinicians, according to an ASH news release.
The analysis by Dr. Desai and co-authors included 257 patients with COVID-19 as determined by their physician, including 135 with a primary diagnosis of acute myeloid leukemia, 82 with acute lymphocytic leukemia, and 40 with myelodysplastic syndromes. Sixty percent of the patients were hospitalized due to COVID-19.
At the time of COVID-19 diagnosis, 46% of patients were in remission, and 44% had active disease, according to the report.
Both neutropenia and active disease status at COVID-19 diagnosis were linked to severe COVID-19, defined as ICU admission due to a COVID-19-related reason, according to results of multivariable analysis. Among patients with severe COVID-19, 67% had active disease, meaning just 33% were in remission, Dr. Desai noted.
In multivariable analysis, two factors were significantly associated with mortality, she added: having an estimated pre-COVID-19 prognosis from the primary disease of less than 6 months, and deferral of ICU care when it was recommended to the patient.
Mortality was 21% overall, higher than would be expected in a non-cancer population, Dr. Desai said. For patients with COVID-19 requiring hospitalization, the mortality rate was 34% and for those patients who did go to the ICU, the mortality rate was 68%.
By contrast, there was no significant association between mortality and active disease as compared to disease in remission, Dr. Desai noted in her presentation. Likewise, mortality was not associated with active treatment at the time of COVID-19 diagnosis as compared to no treatment.
Gwen Nichols, MD, executive vice president and chief medical officer of the Leukemia & Lymphoma Society, New York, said those are reassuring data for patients with acute leukemias and myelodysplastic syndromes and their healthcare providers.
“From our point of view, it helps us say, ‘do not stop your treatment because of worries about COVID-19—it’s more important that you treat your cancer,” Dr. Nichols said in an interview. “We now know we can help people through COVID-19, and I think this is just really important data to back that up,” she added.
Dr. Desai provided disclosures related to Agios, Kura Oncology, and Bristol Myers Squibb (consultancy), and to Janssen R&D and Astex (research funding).
, results of an American Society of Hematology (ASH) COVID-19 registry study suggest.
Rates of severe COVID-19 were significantly higher among patients who had active disease or neutropenia at the time of their COVID-19 diagnosis. Mortality related to COVID-19 was linked to neutropenia, primary disease prognosis of less than 6 months, and deferral of recommended ICU care, study results show.
By contrast, mortality was not associated with active primary disease or its treatment, according to researcher Pinkal Desai, MD, MPH.
Taken together, these findings provide preliminary evidence to support the use of aggressive supportive treatment of COVID-19 in patients with acute leukemias and myelodysplastic syndromes, said Dr. Desai, a hematologist-oncologist with Weill Cornell Medicine and NewYork-Presbyterian in New York.
“If desired by patients, aggressive support for hospitalized patients with COVID-19 is appropriate, regardless of remission status, given the results of our study,” Dr. Desai said in a press conference during the annual meeting of the American Society of Hematology.
In non-cancer patient populations, advanced age and cytopenias have been associated with mortality related to COVID-19, Dr. Desai said. Likewise, patients with acute leukemias and myelodysplastic syndrome are generally older and have disease- or treatment-related cytopenias, which might affect the severity of and mortality from COVID-19, she added.
With that concern in mind, Dr. Desai and co-investigators looked at predictors of severe COVID-19 disease and death among patients in the ASH Research Collaborative (ASH RC) COVID-19 Registry for Hematology.
This registry was started in the early days of the pandemic to provide real-time observational COVID-19 data to clinicians, according to an ASH news release.
The analysis by Dr. Desai and co-authors included 257 patients with COVID-19 as determined by their physician, including 135 with a primary diagnosis of acute myeloid leukemia, 82 with acute lymphocytic leukemia, and 40 with myelodysplastic syndromes. Sixty percent of the patients were hospitalized due to COVID-19.
At the time of COVID-19 diagnosis, 46% of patients were in remission, and 44% had active disease, according to the report.
Both neutropenia and active disease status at COVID-19 diagnosis were linked to severe COVID-19, defined as ICU admission due to a COVID-19-related reason, according to results of multivariable analysis. Among patients with severe COVID-19, 67% had active disease, meaning just 33% were in remission, Dr. Desai noted.
In multivariable analysis, two factors were significantly associated with mortality, she added: having an estimated pre-COVID-19 prognosis from the primary disease of less than 6 months, and deferral of ICU care when it was recommended to the patient.
Mortality was 21% overall, higher than would be expected in a non-cancer population, Dr. Desai said. For patients with COVID-19 requiring hospitalization, the mortality rate was 34% and for those patients who did go to the ICU, the mortality rate was 68%.
By contrast, there was no significant association between mortality and active disease as compared to disease in remission, Dr. Desai noted in her presentation. Likewise, mortality was not associated with active treatment at the time of COVID-19 diagnosis as compared to no treatment.
Gwen Nichols, MD, executive vice president and chief medical officer of the Leukemia & Lymphoma Society, New York, said those are reassuring data for patients with acute leukemias and myelodysplastic syndromes and their healthcare providers.
“From our point of view, it helps us say, ‘do not stop your treatment because of worries about COVID-19—it’s more important that you treat your cancer,” Dr. Nichols said in an interview. “We now know we can help people through COVID-19, and I think this is just really important data to back that up,” she added.
Dr. Desai provided disclosures related to Agios, Kura Oncology, and Bristol Myers Squibb (consultancy), and to Janssen R&D and Astex (research funding).
FROM ASH 2021
Customizing pre-CAR T chemotherapy could improve ALL patient outcomes
The findings, if validated in a prospective study, could help cut the rate of relapses after initial response to CAR T-cell therapy, which currently approaches 50%, the investigators noted.
In 152 pediatric and young adult patients with relapsed or refractory B-cell acute lymphoblastic leukemia (B-ALL) who underwent CD-19-directed CAR T-cell therapy after cyclophosphamide/fludarabine lymphodepleting chemotherapy, estimated fludarabine exposure was associated with cumulative incidence of relapse (CIR) and a composite endpoint that included loss of B-cell aplasia (BCA) or relapse, Vanessa Fabrizio, MD, and colleagues found.
Dr. Fabrizio, a pediatric hematologist and oncologist at Children’s Hospital Colorado and the University of Colorado Cancer Center in Aurora, was a fellow at Memorial Sloan Kettering (MSK) Cancer Center during the study.
Optimal fludarabine exposure was identified by the investigators as an area under the curve (AUC) of at least 13.8 mg*hr/L. The fludarabine exposure AUC was calculated for each patient by using a validated pharmacokinetics population model.
Multivariable analyses controlling for baseline patient factors and fludarabine exposure showed that patients without optimal exposure had a 2.5-fold higher CIR (hazard ratio, 2.45), and a twofold higher risk of relapse or loss of BCA (HR, 1.96), compared with those who had optimal fludarabine exposure, they reported.
High pre-infusion disease burden was associated with an increased risk of relapse and death (HRs, 2.66 and 4.77, respectively), they said.
The study was published online Nov. 17 in Blood Advances.
“We know that [with] fludarabine ... everyone’s body clears it differently,” principal investigator Kevin J. Curran, MD, said in an interview.
Factors affecting clearance include kidney function and weight, and it is simple to determine the optimal dose based on these factors and apply that in practice, said Dr. Curran, a pediatric oncologist and assistant attending physician specializing in cellular therapy at MSK Kids.
In fact, in prior studies, optimal fludarabine exposure in patients undergoing allogeneic hematopoietic cell transplantation has been shown to “decrease nonrelapse mortality due to improved immune reconstitution and subsequently improve survival,” he and his colleagues wrote, explaining the rationale for the study.
The participants, who were part of the Pediatric Real-World CAR Consortium (PRWCC), had a median age of 12.5 years, and 131 of 152 (86%) responded to CAR T-cell therapy. The 12-month OS was 75.1%, the 12-month CIR was 36.4%, and 67% of patients had optimal fludarabine exposure, the authors said.
The findings indeed suggest that one way to improve outcomes without changing the actual cell therapy is to tailor the lymphodepleting therapy prior to CAR T-cell therapy, said Dr. Curran.
“That’s what this does. It’s exciting because cell therapy is very effective [in terms of] initial response, but what we don’t like is the durability of the response,” he said “The next step is to prove it in a prospective study.”
A phase 2 study looking at personalized dosing, as opposed to the standard 30 mg/m2 that most patients receive, is planned for 2022, he noted.
The study was supported by a St Baldrick’s/Stand Up 2 Cancer Pediatric Dream Team Translational Cancer Research Grant, the Virginia and D.K. Ludwig Fund for Cancer Research, and a National Cancer Institute Cancer Center Support Grant. Dr. Curran has served as a consultant for Novartis and Mesoblast, and received research funding from Novartis and Celgene. Dr. Fabrizio reported having no disclosures.
The findings, if validated in a prospective study, could help cut the rate of relapses after initial response to CAR T-cell therapy, which currently approaches 50%, the investigators noted.
In 152 pediatric and young adult patients with relapsed or refractory B-cell acute lymphoblastic leukemia (B-ALL) who underwent CD-19-directed CAR T-cell therapy after cyclophosphamide/fludarabine lymphodepleting chemotherapy, estimated fludarabine exposure was associated with cumulative incidence of relapse (CIR) and a composite endpoint that included loss of B-cell aplasia (BCA) or relapse, Vanessa Fabrizio, MD, and colleagues found.
Dr. Fabrizio, a pediatric hematologist and oncologist at Children’s Hospital Colorado and the University of Colorado Cancer Center in Aurora, was a fellow at Memorial Sloan Kettering (MSK) Cancer Center during the study.
Optimal fludarabine exposure was identified by the investigators as an area under the curve (AUC) of at least 13.8 mg*hr/L. The fludarabine exposure AUC was calculated for each patient by using a validated pharmacokinetics population model.
Multivariable analyses controlling for baseline patient factors and fludarabine exposure showed that patients without optimal exposure had a 2.5-fold higher CIR (hazard ratio, 2.45), and a twofold higher risk of relapse or loss of BCA (HR, 1.96), compared with those who had optimal fludarabine exposure, they reported.
High pre-infusion disease burden was associated with an increased risk of relapse and death (HRs, 2.66 and 4.77, respectively), they said.
The study was published online Nov. 17 in Blood Advances.
“We know that [with] fludarabine ... everyone’s body clears it differently,” principal investigator Kevin J. Curran, MD, said in an interview.
Factors affecting clearance include kidney function and weight, and it is simple to determine the optimal dose based on these factors and apply that in practice, said Dr. Curran, a pediatric oncologist and assistant attending physician specializing in cellular therapy at MSK Kids.
In fact, in prior studies, optimal fludarabine exposure in patients undergoing allogeneic hematopoietic cell transplantation has been shown to “decrease nonrelapse mortality due to improved immune reconstitution and subsequently improve survival,” he and his colleagues wrote, explaining the rationale for the study.
The participants, who were part of the Pediatric Real-World CAR Consortium (PRWCC), had a median age of 12.5 years, and 131 of 152 (86%) responded to CAR T-cell therapy. The 12-month OS was 75.1%, the 12-month CIR was 36.4%, and 67% of patients had optimal fludarabine exposure, the authors said.
The findings indeed suggest that one way to improve outcomes without changing the actual cell therapy is to tailor the lymphodepleting therapy prior to CAR T-cell therapy, said Dr. Curran.
“That’s what this does. It’s exciting because cell therapy is very effective [in terms of] initial response, but what we don’t like is the durability of the response,” he said “The next step is to prove it in a prospective study.”
A phase 2 study looking at personalized dosing, as opposed to the standard 30 mg/m2 that most patients receive, is planned for 2022, he noted.
The study was supported by a St Baldrick’s/Stand Up 2 Cancer Pediatric Dream Team Translational Cancer Research Grant, the Virginia and D.K. Ludwig Fund for Cancer Research, and a National Cancer Institute Cancer Center Support Grant. Dr. Curran has served as a consultant for Novartis and Mesoblast, and received research funding from Novartis and Celgene. Dr. Fabrizio reported having no disclosures.
The findings, if validated in a prospective study, could help cut the rate of relapses after initial response to CAR T-cell therapy, which currently approaches 50%, the investigators noted.
In 152 pediatric and young adult patients with relapsed or refractory B-cell acute lymphoblastic leukemia (B-ALL) who underwent CD-19-directed CAR T-cell therapy after cyclophosphamide/fludarabine lymphodepleting chemotherapy, estimated fludarabine exposure was associated with cumulative incidence of relapse (CIR) and a composite endpoint that included loss of B-cell aplasia (BCA) or relapse, Vanessa Fabrizio, MD, and colleagues found.
Dr. Fabrizio, a pediatric hematologist and oncologist at Children’s Hospital Colorado and the University of Colorado Cancer Center in Aurora, was a fellow at Memorial Sloan Kettering (MSK) Cancer Center during the study.
Optimal fludarabine exposure was identified by the investigators as an area under the curve (AUC) of at least 13.8 mg*hr/L. The fludarabine exposure AUC was calculated for each patient by using a validated pharmacokinetics population model.
Multivariable analyses controlling for baseline patient factors and fludarabine exposure showed that patients without optimal exposure had a 2.5-fold higher CIR (hazard ratio, 2.45), and a twofold higher risk of relapse or loss of BCA (HR, 1.96), compared with those who had optimal fludarabine exposure, they reported.
High pre-infusion disease burden was associated with an increased risk of relapse and death (HRs, 2.66 and 4.77, respectively), they said.
The study was published online Nov. 17 in Blood Advances.
“We know that [with] fludarabine ... everyone’s body clears it differently,” principal investigator Kevin J. Curran, MD, said in an interview.
Factors affecting clearance include kidney function and weight, and it is simple to determine the optimal dose based on these factors and apply that in practice, said Dr. Curran, a pediatric oncologist and assistant attending physician specializing in cellular therapy at MSK Kids.
In fact, in prior studies, optimal fludarabine exposure in patients undergoing allogeneic hematopoietic cell transplantation has been shown to “decrease nonrelapse mortality due to improved immune reconstitution and subsequently improve survival,” he and his colleagues wrote, explaining the rationale for the study.
The participants, who were part of the Pediatric Real-World CAR Consortium (PRWCC), had a median age of 12.5 years, and 131 of 152 (86%) responded to CAR T-cell therapy. The 12-month OS was 75.1%, the 12-month CIR was 36.4%, and 67% of patients had optimal fludarabine exposure, the authors said.
The findings indeed suggest that one way to improve outcomes without changing the actual cell therapy is to tailor the lymphodepleting therapy prior to CAR T-cell therapy, said Dr. Curran.
“That’s what this does. It’s exciting because cell therapy is very effective [in terms of] initial response, but what we don’t like is the durability of the response,” he said “The next step is to prove it in a prospective study.”
A phase 2 study looking at personalized dosing, as opposed to the standard 30 mg/m2 that most patients receive, is planned for 2022, he noted.
The study was supported by a St Baldrick’s/Stand Up 2 Cancer Pediatric Dream Team Translational Cancer Research Grant, the Virginia and D.K. Ludwig Fund for Cancer Research, and a National Cancer Institute Cancer Center Support Grant. Dr. Curran has served as a consultant for Novartis and Mesoblast, and received research funding from Novartis and Celgene. Dr. Fabrizio reported having no disclosures.
FROM BLOOD ADVANCES
Treating ALL: Asparaginase enzyme levels linked to toxicities
Key toxicities related to treating acute lymphoblastic leukemia (ALL) with asparaginase, specifically pancreatitis and osteonecrosis, are associated with increases in asparaginase enzyme activity, suggesting that patients at risk for those toxicities would benefit from therapeutic drug monitoring, according to new research.
In the study, published Oct. 8 in Blood Advances, increased asparaginase enzyme activity was not significantly associated with overall asparaginase toxicity. However,“ the authors concluded.
“The [findings are] new, and we have included patients from a quite big cohort, which is unique,” coauthor Birgitte Klug Albertsen, MD, PhD, associate clinical professor with Aarhus (Denmark) University Hospital, told this news organization.
Therapeutic drug monitoring already is widely used during treatment with asparaginase, the standard of care treatment for ALL; however, the focus of this monitoring has typically been on clinical effectiveness, as levels of asparaginase enzyme activity can indicate hypersensitivity reactions, while the absence of such activity can suggest inferior outcomes.
Meanwhile, drug monitoring is not normally used to assess the risk of treatment-related toxicities. This has been due to a lack of evidence regarding asparaginase enzyme activity and toxicity risk, which, if severe enough, can prevent further treatment.
To investigate the relationship with toxicities, Dr. Albertsen and colleagues evaluated data from seven countries in Europe on 1,155 children between the ages of 1 and 17.9 who were diagnosed with ALL and treated with asparaginase, according to the Nordic Society of Paediatric Haematology and Oncology (NOPHO) ALL2008 protocol between July 2008 and March 2016.
Blood samples drawn approximately 14 days after asparaginase administration showed that some level of asparaginase enzyme activity was measurable in 955 patients (82.7%), while 200 patients (17.3%) had asparaginase inactivation. Overall, there were 159 asparaginase-associated toxicities of pancreatitis, thromboembolism, or osteonecrosis among the 955 patients with measurable asparaginase enzyme activity.
There were no significant differences in median asparaginase enzyme activity levels between those who did and did not experience toxicities (224 IU/L vs. 221 IU/L, respectively; P = .1), and the results did not change after adjustment for age and sex. However, the risk of pancreatitis was found to increase with a hazard ratio (HR) of 1.40 for each 100 IU/L increase in the median asparaginase enzyme activity level (P = .002).
Likewise, an increase in risk was observed for osteonecrosis (HR 1.36; P = .02) per 100 IU/L increase in median asparaginase enzyme activity. However, the HR for the risk of thromboembolism, the most common of asparaginase-related toxicities, was not significant (HR 0.99; P = .96).
Dr. Albertsen said the etiology behind the occurrence of osteonecrosis is not well understood.
“We know that steroids, especially dexamethasone, are a risk factor,” she said. “We believe that asparaginase may play a role too, but a clear association has not been demonstrated.”
In the NOPHO ALL2008 protocol used in the study, dexamethasone is used in the same time periods as PEG-asparaginase treatment for patients receiving 15 doses.
The finding of only a nonsignificant trend between asparaginase enzyme activity with overall toxicities may have reflected the low dose that was used, Dr. Albertsen added.
“In the NOPHO ALL2008 protocol, we used quite a low dose of PEG-asparaginase, and the risk may be higher in protocols using higher doses,” she said.
Relapse reduction
Notably, the study showed that asparaginase enzyme elevations were, in fact, not significantly associated with a reduction in the risk of leukemic relapse (HR .88 per 100 IU/L increase; P = .35).
Those findings suggest that measurable asparaginase enzyme activity levels, and thus asparaginase depletion, “may be sufficient to ensure an antileukemic effect,” the authors noted.
“Therapeutic drug monitoring of asparaginase enzyme activity is indicated mainly to detect inactivation, but [it] may be further explored for dose reduction to reduce some specific toxicities,” they concluded.
Dr. Albertsen disclosed being sponsor of the investigator-initiatied NOR-GRASPALL 2016 trial.
Key toxicities related to treating acute lymphoblastic leukemia (ALL) with asparaginase, specifically pancreatitis and osteonecrosis, are associated with increases in asparaginase enzyme activity, suggesting that patients at risk for those toxicities would benefit from therapeutic drug monitoring, according to new research.
In the study, published Oct. 8 in Blood Advances, increased asparaginase enzyme activity was not significantly associated with overall asparaginase toxicity. However,“ the authors concluded.
“The [findings are] new, and we have included patients from a quite big cohort, which is unique,” coauthor Birgitte Klug Albertsen, MD, PhD, associate clinical professor with Aarhus (Denmark) University Hospital, told this news organization.
Therapeutic drug monitoring already is widely used during treatment with asparaginase, the standard of care treatment for ALL; however, the focus of this monitoring has typically been on clinical effectiveness, as levels of asparaginase enzyme activity can indicate hypersensitivity reactions, while the absence of such activity can suggest inferior outcomes.
Meanwhile, drug monitoring is not normally used to assess the risk of treatment-related toxicities. This has been due to a lack of evidence regarding asparaginase enzyme activity and toxicity risk, which, if severe enough, can prevent further treatment.
To investigate the relationship with toxicities, Dr. Albertsen and colleagues evaluated data from seven countries in Europe on 1,155 children between the ages of 1 and 17.9 who were diagnosed with ALL and treated with asparaginase, according to the Nordic Society of Paediatric Haematology and Oncology (NOPHO) ALL2008 protocol between July 2008 and March 2016.
Blood samples drawn approximately 14 days after asparaginase administration showed that some level of asparaginase enzyme activity was measurable in 955 patients (82.7%), while 200 patients (17.3%) had asparaginase inactivation. Overall, there were 159 asparaginase-associated toxicities of pancreatitis, thromboembolism, or osteonecrosis among the 955 patients with measurable asparaginase enzyme activity.
There were no significant differences in median asparaginase enzyme activity levels between those who did and did not experience toxicities (224 IU/L vs. 221 IU/L, respectively; P = .1), and the results did not change after adjustment for age and sex. However, the risk of pancreatitis was found to increase with a hazard ratio (HR) of 1.40 for each 100 IU/L increase in the median asparaginase enzyme activity level (P = .002).
Likewise, an increase in risk was observed for osteonecrosis (HR 1.36; P = .02) per 100 IU/L increase in median asparaginase enzyme activity. However, the HR for the risk of thromboembolism, the most common of asparaginase-related toxicities, was not significant (HR 0.99; P = .96).
Dr. Albertsen said the etiology behind the occurrence of osteonecrosis is not well understood.
“We know that steroids, especially dexamethasone, are a risk factor,” she said. “We believe that asparaginase may play a role too, but a clear association has not been demonstrated.”
In the NOPHO ALL2008 protocol used in the study, dexamethasone is used in the same time periods as PEG-asparaginase treatment for patients receiving 15 doses.
The finding of only a nonsignificant trend between asparaginase enzyme activity with overall toxicities may have reflected the low dose that was used, Dr. Albertsen added.
“In the NOPHO ALL2008 protocol, we used quite a low dose of PEG-asparaginase, and the risk may be higher in protocols using higher doses,” she said.
Relapse reduction
Notably, the study showed that asparaginase enzyme elevations were, in fact, not significantly associated with a reduction in the risk of leukemic relapse (HR .88 per 100 IU/L increase; P = .35).
Those findings suggest that measurable asparaginase enzyme activity levels, and thus asparaginase depletion, “may be sufficient to ensure an antileukemic effect,” the authors noted.
“Therapeutic drug monitoring of asparaginase enzyme activity is indicated mainly to detect inactivation, but [it] may be further explored for dose reduction to reduce some specific toxicities,” they concluded.
Dr. Albertsen disclosed being sponsor of the investigator-initiatied NOR-GRASPALL 2016 trial.
Key toxicities related to treating acute lymphoblastic leukemia (ALL) with asparaginase, specifically pancreatitis and osteonecrosis, are associated with increases in asparaginase enzyme activity, suggesting that patients at risk for those toxicities would benefit from therapeutic drug monitoring, according to new research.
In the study, published Oct. 8 in Blood Advances, increased asparaginase enzyme activity was not significantly associated with overall asparaginase toxicity. However,“ the authors concluded.
“The [findings are] new, and we have included patients from a quite big cohort, which is unique,” coauthor Birgitte Klug Albertsen, MD, PhD, associate clinical professor with Aarhus (Denmark) University Hospital, told this news organization.
Therapeutic drug monitoring already is widely used during treatment with asparaginase, the standard of care treatment for ALL; however, the focus of this monitoring has typically been on clinical effectiveness, as levels of asparaginase enzyme activity can indicate hypersensitivity reactions, while the absence of such activity can suggest inferior outcomes.
Meanwhile, drug monitoring is not normally used to assess the risk of treatment-related toxicities. This has been due to a lack of evidence regarding asparaginase enzyme activity and toxicity risk, which, if severe enough, can prevent further treatment.
To investigate the relationship with toxicities, Dr. Albertsen and colleagues evaluated data from seven countries in Europe on 1,155 children between the ages of 1 and 17.9 who were diagnosed with ALL and treated with asparaginase, according to the Nordic Society of Paediatric Haematology and Oncology (NOPHO) ALL2008 protocol between July 2008 and March 2016.
Blood samples drawn approximately 14 days after asparaginase administration showed that some level of asparaginase enzyme activity was measurable in 955 patients (82.7%), while 200 patients (17.3%) had asparaginase inactivation. Overall, there were 159 asparaginase-associated toxicities of pancreatitis, thromboembolism, or osteonecrosis among the 955 patients with measurable asparaginase enzyme activity.
There were no significant differences in median asparaginase enzyme activity levels between those who did and did not experience toxicities (224 IU/L vs. 221 IU/L, respectively; P = .1), and the results did not change after adjustment for age and sex. However, the risk of pancreatitis was found to increase with a hazard ratio (HR) of 1.40 for each 100 IU/L increase in the median asparaginase enzyme activity level (P = .002).
Likewise, an increase in risk was observed for osteonecrosis (HR 1.36; P = .02) per 100 IU/L increase in median asparaginase enzyme activity. However, the HR for the risk of thromboembolism, the most common of asparaginase-related toxicities, was not significant (HR 0.99; P = .96).
Dr. Albertsen said the etiology behind the occurrence of osteonecrosis is not well understood.
“We know that steroids, especially dexamethasone, are a risk factor,” she said. “We believe that asparaginase may play a role too, but a clear association has not been demonstrated.”
In the NOPHO ALL2008 protocol used in the study, dexamethasone is used in the same time periods as PEG-asparaginase treatment for patients receiving 15 doses.
The finding of only a nonsignificant trend between asparaginase enzyme activity with overall toxicities may have reflected the low dose that was used, Dr. Albertsen added.
“In the NOPHO ALL2008 protocol, we used quite a low dose of PEG-asparaginase, and the risk may be higher in protocols using higher doses,” she said.
Relapse reduction
Notably, the study showed that asparaginase enzyme elevations were, in fact, not significantly associated with a reduction in the risk of leukemic relapse (HR .88 per 100 IU/L increase; P = .35).
Those findings suggest that measurable asparaginase enzyme activity levels, and thus asparaginase depletion, “may be sufficient to ensure an antileukemic effect,” the authors noted.
“Therapeutic drug monitoring of asparaginase enzyme activity is indicated mainly to detect inactivation, but [it] may be further explored for dose reduction to reduce some specific toxicities,” they concluded.
Dr. Albertsen disclosed being sponsor of the investigator-initiatied NOR-GRASPALL 2016 trial.
Immunotherapies for children with r/r ALL face off
It’s possible to compare apples and oranges – both are fruits, after all; likewise, in the absence of head-to-head trials, it’s possible to make an indirect comparison of two immunotherapy strategies for treating relapsed or refractory pediatric acute lymphoblastic leukemia (r/r ALL): chimeric antigen receptor (CAR) T-cell therapy with tisagenlecleucel (Kymriah), and immunotherapy with the bi-specific T-cell engager (BiTE) blinatumomab (Blincyto).
Michael Verneris, MD, of the University of Colorado Anschutz Medical Center in Aurora, and associates carried out the first such indirect, patient-level comparison of these two immunotherapies.
“The large differences in CR and OS outcomes across multiple differing assessments suggest that our findings describe a true treatment impact. Although the current analysis is retrospective and limited by cross-study comparison, these findings support the growing body of clinical trial and real-world evidence demonstrating that tisagenlecleucel is an important treatment option for children and young adults with r/r ALL,” they wrote in an article published in Blood Advances.
However, as two pediatric leukemia experts uninvolved in the study noted, the comparison may be of limited use because the two immunotherapy agents can have different indications and applications, depending on the clinical situation.
Trial data compared
Dr. Verneris and colleagues looked at patient-level data from two clinical trials: the phase 2 single-arm ELIANA trial evaluating tisagenlecleucel in patients with relapsed and refractory B-cell lineage ALL (79 patients), and the efficacy phase of the MT103-205 trial assessing blinatumomab in a similar population (70 patients).
To account for differences between the studies, the investigators used five different statistical approaches, including propensity score weighting and adjustment for prognostic factors.
Regardless of the analytical method they used, results showed that patients treated with tisagenlecleucel were significantly more likely to have complete remissions than were patients treated with blinatumomab, with odds ratios favoring the CAR T-cell construct ranging from 6.71 to 9.76.
Similarly, treatment with tisagenlecleucel was associated with lower risk for death, with hazard ratios ranging from 68% to 74%.
The authors acknowledged that some prognostic variables such as bone marrow blast count, remission duration, and performance status were not recorded in the patient level data from the blinatumomab trial and therefore they could not be used in the analyses. They also conceded that selection bias could account for some of the differences in outcomes between the trials.
Patient characteristics drive choice
The comparison of the two agents “is something we as treating physicians often think about, because we are faced with a choice often of tisagenlecleucel or blinatumomab when we have a relapsed/refractory patient, ” Melinda Pauly, MD, medical director of oncology at the Aflac Cancer and Blood Disorders Center of Children’s Healthcare of Atlanta, said in an interview.
Dr. Pauly, who was not involved in the study, said that the choice of therapy is based primarily on patient characteristics and the specific clinical situation.
“For patients who have prior toxicity with bone marrow transplant or don’t have a good donor option for bone marrow transplant, those are certainly patients that we are looking for a therapy that would be more sustained, and that would definitely be the tisagenlecleucel,” she said.
CAR T-cell therapy may not be an immediate option for patients for whom time is critical, however, due to the requirements of apheresis for T-cell harvesting, cell transduction, expansion, and infusion, and for such patients who have disease refractory to chemotherapy, blinatumomab may be an option.
Blinatumomab may also serve as a bridge to transplant, she said.
Dr. Pauly, who has a special interest in the care of infants with ALL, noted that apheresis can be difficult to accomplish in very young patients and may not yield T-cells sufficient for CAR T therapy, and for these patients blinatumomab may be the better option.
Howard Weinstein, MD, unit chief of the division of pediatric hematology/oncology at Mass General Hospital for Children in Boston, noted that “there are all kinds of statistical methodologies to try to balance the two populations in the studies, and they did as best as you can at balancing the risk factors, such as the number of patients with relapses after prior bone marrow transplants.”
“But there are so many genetic subtypes of acute lymphoblastic leukemia that have differing prognoses, it’s hard to do this kind of retrospective analysis when it’s not a randomized head-to-head trial,” he said in an interview.
Novartis Pharmaceuticals, maker of tisagenlecleucel, sponsored the study. Dr. Verneris disclosed serving on advisory boards for Novartis, and five of the study coauthors are employees of the company. Dr. Pauly and Dr. Weinstein reported having no conflicts of interest.
It’s possible to compare apples and oranges – both are fruits, after all; likewise, in the absence of head-to-head trials, it’s possible to make an indirect comparison of two immunotherapy strategies for treating relapsed or refractory pediatric acute lymphoblastic leukemia (r/r ALL): chimeric antigen receptor (CAR) T-cell therapy with tisagenlecleucel (Kymriah), and immunotherapy with the bi-specific T-cell engager (BiTE) blinatumomab (Blincyto).
Michael Verneris, MD, of the University of Colorado Anschutz Medical Center in Aurora, and associates carried out the first such indirect, patient-level comparison of these two immunotherapies.
“The large differences in CR and OS outcomes across multiple differing assessments suggest that our findings describe a true treatment impact. Although the current analysis is retrospective and limited by cross-study comparison, these findings support the growing body of clinical trial and real-world evidence demonstrating that tisagenlecleucel is an important treatment option for children and young adults with r/r ALL,” they wrote in an article published in Blood Advances.
However, as two pediatric leukemia experts uninvolved in the study noted, the comparison may be of limited use because the two immunotherapy agents can have different indications and applications, depending on the clinical situation.
Trial data compared
Dr. Verneris and colleagues looked at patient-level data from two clinical trials: the phase 2 single-arm ELIANA trial evaluating tisagenlecleucel in patients with relapsed and refractory B-cell lineage ALL (79 patients), and the efficacy phase of the MT103-205 trial assessing blinatumomab in a similar population (70 patients).
To account for differences between the studies, the investigators used five different statistical approaches, including propensity score weighting and adjustment for prognostic factors.
Regardless of the analytical method they used, results showed that patients treated with tisagenlecleucel were significantly more likely to have complete remissions than were patients treated with blinatumomab, with odds ratios favoring the CAR T-cell construct ranging from 6.71 to 9.76.
Similarly, treatment with tisagenlecleucel was associated with lower risk for death, with hazard ratios ranging from 68% to 74%.
The authors acknowledged that some prognostic variables such as bone marrow blast count, remission duration, and performance status were not recorded in the patient level data from the blinatumomab trial and therefore they could not be used in the analyses. They also conceded that selection bias could account for some of the differences in outcomes between the trials.
Patient characteristics drive choice
The comparison of the two agents “is something we as treating physicians often think about, because we are faced with a choice often of tisagenlecleucel or blinatumomab when we have a relapsed/refractory patient, ” Melinda Pauly, MD, medical director of oncology at the Aflac Cancer and Blood Disorders Center of Children’s Healthcare of Atlanta, said in an interview.
Dr. Pauly, who was not involved in the study, said that the choice of therapy is based primarily on patient characteristics and the specific clinical situation.
“For patients who have prior toxicity with bone marrow transplant or don’t have a good donor option for bone marrow transplant, those are certainly patients that we are looking for a therapy that would be more sustained, and that would definitely be the tisagenlecleucel,” she said.
CAR T-cell therapy may not be an immediate option for patients for whom time is critical, however, due to the requirements of apheresis for T-cell harvesting, cell transduction, expansion, and infusion, and for such patients who have disease refractory to chemotherapy, blinatumomab may be an option.
Blinatumomab may also serve as a bridge to transplant, she said.
Dr. Pauly, who has a special interest in the care of infants with ALL, noted that apheresis can be difficult to accomplish in very young patients and may not yield T-cells sufficient for CAR T therapy, and for these patients blinatumomab may be the better option.
Howard Weinstein, MD, unit chief of the division of pediatric hematology/oncology at Mass General Hospital for Children in Boston, noted that “there are all kinds of statistical methodologies to try to balance the two populations in the studies, and they did as best as you can at balancing the risk factors, such as the number of patients with relapses after prior bone marrow transplants.”
“But there are so many genetic subtypes of acute lymphoblastic leukemia that have differing prognoses, it’s hard to do this kind of retrospective analysis when it’s not a randomized head-to-head trial,” he said in an interview.
Novartis Pharmaceuticals, maker of tisagenlecleucel, sponsored the study. Dr. Verneris disclosed serving on advisory boards for Novartis, and five of the study coauthors are employees of the company. Dr. Pauly and Dr. Weinstein reported having no conflicts of interest.
It’s possible to compare apples and oranges – both are fruits, after all; likewise, in the absence of head-to-head trials, it’s possible to make an indirect comparison of two immunotherapy strategies for treating relapsed or refractory pediatric acute lymphoblastic leukemia (r/r ALL): chimeric antigen receptor (CAR) T-cell therapy with tisagenlecleucel (Kymriah), and immunotherapy with the bi-specific T-cell engager (BiTE) blinatumomab (Blincyto).
Michael Verneris, MD, of the University of Colorado Anschutz Medical Center in Aurora, and associates carried out the first such indirect, patient-level comparison of these two immunotherapies.
“The large differences in CR and OS outcomes across multiple differing assessments suggest that our findings describe a true treatment impact. Although the current analysis is retrospective and limited by cross-study comparison, these findings support the growing body of clinical trial and real-world evidence demonstrating that tisagenlecleucel is an important treatment option for children and young adults with r/r ALL,” they wrote in an article published in Blood Advances.
However, as two pediatric leukemia experts uninvolved in the study noted, the comparison may be of limited use because the two immunotherapy agents can have different indications and applications, depending on the clinical situation.
Trial data compared
Dr. Verneris and colleagues looked at patient-level data from two clinical trials: the phase 2 single-arm ELIANA trial evaluating tisagenlecleucel in patients with relapsed and refractory B-cell lineage ALL (79 patients), and the efficacy phase of the MT103-205 trial assessing blinatumomab in a similar population (70 patients).
To account for differences between the studies, the investigators used five different statistical approaches, including propensity score weighting and adjustment for prognostic factors.
Regardless of the analytical method they used, results showed that patients treated with tisagenlecleucel were significantly more likely to have complete remissions than were patients treated with blinatumomab, with odds ratios favoring the CAR T-cell construct ranging from 6.71 to 9.76.
Similarly, treatment with tisagenlecleucel was associated with lower risk for death, with hazard ratios ranging from 68% to 74%.
The authors acknowledged that some prognostic variables such as bone marrow blast count, remission duration, and performance status were not recorded in the patient level data from the blinatumomab trial and therefore they could not be used in the analyses. They also conceded that selection bias could account for some of the differences in outcomes between the trials.
Patient characteristics drive choice
The comparison of the two agents “is something we as treating physicians often think about, because we are faced with a choice often of tisagenlecleucel or blinatumomab when we have a relapsed/refractory patient, ” Melinda Pauly, MD, medical director of oncology at the Aflac Cancer and Blood Disorders Center of Children’s Healthcare of Atlanta, said in an interview.
Dr. Pauly, who was not involved in the study, said that the choice of therapy is based primarily on patient characteristics and the specific clinical situation.
“For patients who have prior toxicity with bone marrow transplant or don’t have a good donor option for bone marrow transplant, those are certainly patients that we are looking for a therapy that would be more sustained, and that would definitely be the tisagenlecleucel,” she said.
CAR T-cell therapy may not be an immediate option for patients for whom time is critical, however, due to the requirements of apheresis for T-cell harvesting, cell transduction, expansion, and infusion, and for such patients who have disease refractory to chemotherapy, blinatumomab may be an option.
Blinatumomab may also serve as a bridge to transplant, she said.
Dr. Pauly, who has a special interest in the care of infants with ALL, noted that apheresis can be difficult to accomplish in very young patients and may not yield T-cells sufficient for CAR T therapy, and for these patients blinatumomab may be the better option.
Howard Weinstein, MD, unit chief of the division of pediatric hematology/oncology at Mass General Hospital for Children in Boston, noted that “there are all kinds of statistical methodologies to try to balance the two populations in the studies, and they did as best as you can at balancing the risk factors, such as the number of patients with relapses after prior bone marrow transplants.”
“But there are so many genetic subtypes of acute lymphoblastic leukemia that have differing prognoses, it’s hard to do this kind of retrospective analysis when it’s not a randomized head-to-head trial,” he said in an interview.
Novartis Pharmaceuticals, maker of tisagenlecleucel, sponsored the study. Dr. Verneris disclosed serving on advisory boards for Novartis, and five of the study coauthors are employees of the company. Dr. Pauly and Dr. Weinstein reported having no conflicts of interest.
FROM BLOOD ADVANCES
New trials in leukemia: Could your patient benefit?
A number of late-phase clinical trials in leukemia have opened in recent months. Maybe one of your patients could benefit from being enrolled.
Adults and children with acute or chronic leukemias
A phase 2 study partnering with the National Marrow Donor Program is seeking individuals aged 1-65 years with lymphoma or one of the following leukemias: “acute leukemia”, acute lymphoblastic (ALL), acute myelogenous (AML), mixed-phenotype acute, chronic myelogenous (CML), and chronic lymphocytic (CLL). Researchers hope to find a way to improve outcomes of hematopoietic-cell transplantation from mismatched, unrelated donors. Participants will receive the transplant and one of seven drug regimens and will be followed for a year. The trial plans to enroll 180 people and began recruiting on Sept. 30 in California, New York, and Virginia. The primary outcome is overall survival (OS). Quality of life (QoL) will not be measured.
Mast-cell leukemia (MCL)
Adults with MCL are sought for a phase 2 study of bezuclastinib, an experimental tyrosine-kinase inhibitor (TKI) called CGT9486. CGT9486 blocks the activity of a mutated version of tyrosine-kinase receptor KIT, called KIT D816V, which is known to cause systemic mastocytosis. Participants will receive oral CGT9486 daily for up to 18 months. The study opened in October, aiming for 140 participants with any advanced systemic mastocytoses (including MCL) at sites in California, Florida, Massachusetts, New York, Ohio, Texas, and Utah. OS and QoL will be tracked.
Previously Treated CLL/Small Lymphocytic Lymphoma (SLL)
Patients with CLL/SLL who have progressed on previous therapy can join a phase 3 study of another experimental oral TIK, pirtobrutinib, this time targeting Bruton’s tyrosine kinase (BTK). BTK plays a key role in the lifecycle of white blood cells. Participants will receive either “fixed-duration” pirtobrutinib plus venetoclax (Venclexta) and rituximab (Ruxience, Riabni, Truxima, Rituxan, MabThera) or the venetoclax-rituximab combo only, for up to 5 years. Investigators started recruiting in September, aiming for 600 participants across Florida, Louisiana, Missouri, New York, and Tennessee. Progression-free survival is the primary outcome; OS is a secondary outcome and QoL will not be tracked.
High-grade myeloid cancers with measurable residual disease
Patients with AML, myelodysplastic syndrome with excess blasts-2 or myeloid neoplasm, and whose original disease is still present, are eligible for a phase 2 study of CPX-351 (daunorubicin-cytarabine, Vyxeos). The intravenous chemotherapy was approved in 2017 for certain types of AML. The goal of this study is to determine if pretreatment with CPX-351 improves the outcome of donor stem-cell transplantation. Patients will either undergo immediate transplantation or receive CPX-351 for up to 10 days followed 60 days later by the transplant. The study, being conducted at the Fred Hutchinson Cancer Research Center in Seattle, started recruiting 130 patients in August. The primary outcome is OS; QoL will not be tracked.
Newly diagnosed Philadelphia-negative ALL
Patients aged 22 or older with Philadelphia-negative ALL who have not received chemotherapy or radiation therapy are invited to join a trial of calaspargase pegol (Asparlas). The therapy was approved in 2018 for ALL in children and young adults (1 month to 21 years). The aim of this study is to confirm the recommended doses and evaluate the drug’s safety and pharmacodynamics in adults over aged 21. Each participant will receive six 2-hour infusions of calaspargase pegol over several months. The primary outcomes are safety and drug activity; OS is a secondary outcome and QoL will not be measured. The study opened on July 7 and aims to recruit 122 participants in 11 states.
Untreated adults with TP53-mutant AML
Adult patients with previously untreated AML who have at least one TP53 gene mutation are sought for a phase 3 study of magrolimab, an investigational anti-CD47 monoclonal antibody. Participants will be treated for up to 27 months with either magrolimab plus azacytidine (Vidaza), venetoclax plus azacytidine (patients deemed “appropriate for nonintensive therapy”), or standard chemotherapy (those “appropriate for intensive therapy”). In patients who received nonintensive therapy, OS is the primary outcome; OS in all participants is a secondary outcome, and QoL won’t be assessed. The trial opened in July and aims to recruit 346 individuals in Hong Kong, Australia, and the United States (California, Missouri, Oklahoma, Pennsylvania, South Carolina, and Texas).
All trial information is from the U.S. National Library of Medicine, National Institutes of Health.
A version of this article first appeared on Medscape.com.
A number of late-phase clinical trials in leukemia have opened in recent months. Maybe one of your patients could benefit from being enrolled.
Adults and children with acute or chronic leukemias
A phase 2 study partnering with the National Marrow Donor Program is seeking individuals aged 1-65 years with lymphoma or one of the following leukemias: “acute leukemia”, acute lymphoblastic (ALL), acute myelogenous (AML), mixed-phenotype acute, chronic myelogenous (CML), and chronic lymphocytic (CLL). Researchers hope to find a way to improve outcomes of hematopoietic-cell transplantation from mismatched, unrelated donors. Participants will receive the transplant and one of seven drug regimens and will be followed for a year. The trial plans to enroll 180 people and began recruiting on Sept. 30 in California, New York, and Virginia. The primary outcome is overall survival (OS). Quality of life (QoL) will not be measured.
Mast-cell leukemia (MCL)
Adults with MCL are sought for a phase 2 study of bezuclastinib, an experimental tyrosine-kinase inhibitor (TKI) called CGT9486. CGT9486 blocks the activity of a mutated version of tyrosine-kinase receptor KIT, called KIT D816V, which is known to cause systemic mastocytosis. Participants will receive oral CGT9486 daily for up to 18 months. The study opened in October, aiming for 140 participants with any advanced systemic mastocytoses (including MCL) at sites in California, Florida, Massachusetts, New York, Ohio, Texas, and Utah. OS and QoL will be tracked.
Previously Treated CLL/Small Lymphocytic Lymphoma (SLL)
Patients with CLL/SLL who have progressed on previous therapy can join a phase 3 study of another experimental oral TIK, pirtobrutinib, this time targeting Bruton’s tyrosine kinase (BTK). BTK plays a key role in the lifecycle of white blood cells. Participants will receive either “fixed-duration” pirtobrutinib plus venetoclax (Venclexta) and rituximab (Ruxience, Riabni, Truxima, Rituxan, MabThera) or the venetoclax-rituximab combo only, for up to 5 years. Investigators started recruiting in September, aiming for 600 participants across Florida, Louisiana, Missouri, New York, and Tennessee. Progression-free survival is the primary outcome; OS is a secondary outcome and QoL will not be tracked.
High-grade myeloid cancers with measurable residual disease
Patients with AML, myelodysplastic syndrome with excess blasts-2 or myeloid neoplasm, and whose original disease is still present, are eligible for a phase 2 study of CPX-351 (daunorubicin-cytarabine, Vyxeos). The intravenous chemotherapy was approved in 2017 for certain types of AML. The goal of this study is to determine if pretreatment with CPX-351 improves the outcome of donor stem-cell transplantation. Patients will either undergo immediate transplantation or receive CPX-351 for up to 10 days followed 60 days later by the transplant. The study, being conducted at the Fred Hutchinson Cancer Research Center in Seattle, started recruiting 130 patients in August. The primary outcome is OS; QoL will not be tracked.
Newly diagnosed Philadelphia-negative ALL
Patients aged 22 or older with Philadelphia-negative ALL who have not received chemotherapy or radiation therapy are invited to join a trial of calaspargase pegol (Asparlas). The therapy was approved in 2018 for ALL in children and young adults (1 month to 21 years). The aim of this study is to confirm the recommended doses and evaluate the drug’s safety and pharmacodynamics in adults over aged 21. Each participant will receive six 2-hour infusions of calaspargase pegol over several months. The primary outcomes are safety and drug activity; OS is a secondary outcome and QoL will not be measured. The study opened on July 7 and aims to recruit 122 participants in 11 states.
Untreated adults with TP53-mutant AML
Adult patients with previously untreated AML who have at least one TP53 gene mutation are sought for a phase 3 study of magrolimab, an investigational anti-CD47 monoclonal antibody. Participants will be treated for up to 27 months with either magrolimab plus azacytidine (Vidaza), venetoclax plus azacytidine (patients deemed “appropriate for nonintensive therapy”), or standard chemotherapy (those “appropriate for intensive therapy”). In patients who received nonintensive therapy, OS is the primary outcome; OS in all participants is a secondary outcome, and QoL won’t be assessed. The trial opened in July and aims to recruit 346 individuals in Hong Kong, Australia, and the United States (California, Missouri, Oklahoma, Pennsylvania, South Carolina, and Texas).
All trial information is from the U.S. National Library of Medicine, National Institutes of Health.
A version of this article first appeared on Medscape.com.
A number of late-phase clinical trials in leukemia have opened in recent months. Maybe one of your patients could benefit from being enrolled.
Adults and children with acute or chronic leukemias
A phase 2 study partnering with the National Marrow Donor Program is seeking individuals aged 1-65 years with lymphoma or one of the following leukemias: “acute leukemia”, acute lymphoblastic (ALL), acute myelogenous (AML), mixed-phenotype acute, chronic myelogenous (CML), and chronic lymphocytic (CLL). Researchers hope to find a way to improve outcomes of hematopoietic-cell transplantation from mismatched, unrelated donors. Participants will receive the transplant and one of seven drug regimens and will be followed for a year. The trial plans to enroll 180 people and began recruiting on Sept. 30 in California, New York, and Virginia. The primary outcome is overall survival (OS). Quality of life (QoL) will not be measured.
Mast-cell leukemia (MCL)
Adults with MCL are sought for a phase 2 study of bezuclastinib, an experimental tyrosine-kinase inhibitor (TKI) called CGT9486. CGT9486 blocks the activity of a mutated version of tyrosine-kinase receptor KIT, called KIT D816V, which is known to cause systemic mastocytosis. Participants will receive oral CGT9486 daily for up to 18 months. The study opened in October, aiming for 140 participants with any advanced systemic mastocytoses (including MCL) at sites in California, Florida, Massachusetts, New York, Ohio, Texas, and Utah. OS and QoL will be tracked.
Previously Treated CLL/Small Lymphocytic Lymphoma (SLL)
Patients with CLL/SLL who have progressed on previous therapy can join a phase 3 study of another experimental oral TIK, pirtobrutinib, this time targeting Bruton’s tyrosine kinase (BTK). BTK plays a key role in the lifecycle of white blood cells. Participants will receive either “fixed-duration” pirtobrutinib plus venetoclax (Venclexta) and rituximab (Ruxience, Riabni, Truxima, Rituxan, MabThera) or the venetoclax-rituximab combo only, for up to 5 years. Investigators started recruiting in September, aiming for 600 participants across Florida, Louisiana, Missouri, New York, and Tennessee. Progression-free survival is the primary outcome; OS is a secondary outcome and QoL will not be tracked.
High-grade myeloid cancers with measurable residual disease
Patients with AML, myelodysplastic syndrome with excess blasts-2 or myeloid neoplasm, and whose original disease is still present, are eligible for a phase 2 study of CPX-351 (daunorubicin-cytarabine, Vyxeos). The intravenous chemotherapy was approved in 2017 for certain types of AML. The goal of this study is to determine if pretreatment with CPX-351 improves the outcome of donor stem-cell transplantation. Patients will either undergo immediate transplantation or receive CPX-351 for up to 10 days followed 60 days later by the transplant. The study, being conducted at the Fred Hutchinson Cancer Research Center in Seattle, started recruiting 130 patients in August. The primary outcome is OS; QoL will not be tracked.
Newly diagnosed Philadelphia-negative ALL
Patients aged 22 or older with Philadelphia-negative ALL who have not received chemotherapy or radiation therapy are invited to join a trial of calaspargase pegol (Asparlas). The therapy was approved in 2018 for ALL in children and young adults (1 month to 21 years). The aim of this study is to confirm the recommended doses and evaluate the drug’s safety and pharmacodynamics in adults over aged 21. Each participant will receive six 2-hour infusions of calaspargase pegol over several months. The primary outcomes are safety and drug activity; OS is a secondary outcome and QoL will not be measured. The study opened on July 7 and aims to recruit 122 participants in 11 states.
Untreated adults with TP53-mutant AML
Adult patients with previously untreated AML who have at least one TP53 gene mutation are sought for a phase 3 study of magrolimab, an investigational anti-CD47 monoclonal antibody. Participants will be treated for up to 27 months with either magrolimab plus azacytidine (Vidaza), venetoclax plus azacytidine (patients deemed “appropriate for nonintensive therapy”), or standard chemotherapy (those “appropriate for intensive therapy”). In patients who received nonintensive therapy, OS is the primary outcome; OS in all participants is a secondary outcome, and QoL won’t be assessed. The trial opened in July and aims to recruit 346 individuals in Hong Kong, Australia, and the United States (California, Missouri, Oklahoma, Pennsylvania, South Carolina, and Texas).
All trial information is from the U.S. National Library of Medicine, National Institutes of Health.
A version of this article first appeared on Medscape.com.
Tolerability doesn’t explain why kids do better than adults on ALL regimens
The study team found that “an intensive pediatric ALL induction protocol can be delivered in an AYA [adolescent and young adult] cohort in a similar time frame to a pediatric population, suggesting that the inferior outcomes seen in AYA patients are more likely related to the biology of AYA ALL rather than intolerance of more intensive therapy,” said investigators led by Matthew Greenwood, MBBS, director of the stem cell transplant at the Royal North Shore Hospital, outside of Sydney
It’s been a long-standing question why intensive ALL regimens, which can be curative in children, don’t work as well in adolescents and young adults.
To see if tolerability and lack of adherence were issues, the investigators compared the treatment time lines of 82 AYA subjects with a median age of 22 years to the time lines of 608 children aged 1-17 years who were treated with the same intensive regimen (the ANZCHOG Study 8 protocol).
Induction/consolidation was equally deliverable in both populations. In the AYA group, 41.5% of subjects started the next phase of treatment – protocol M or high-risk (HR) therapy based on minimal residual disease (MRD) response to initial treatment – by day 94 versus 39.3% in the previous pediatric study (P = 0.77). The median time to protocol M/HR treatment was 96 days in AYAs and 98 days in children (P = .80).
About 52% of AYA subjects proceeded to HR therapy following induction/consolidation, versus just 10.7% in the pediatric study.
The investigators also found that a body mass index at or above 30 kg/m2 and the presence of MRD were both associated with worse disease-free and overall survival. “By addressing the factors predicting poorer outcomes from this study, we hope to significantly improve the outcomes for patients,” they said.
They noted that their work is the first to “report of the safety and efficacy of an MRD-stratified approach utilizing [Berlin-Frankfurt-Munich] HR therapy in an AYA cohort and show that this is a moderately efficacious strategy in patients who would otherwise be considered at high risk of relapse and death.”
Over a median follow-up of 44 months, estimated 3-year disease-free survival was 72.8% and estimated 3-year overall survival 74.9% in the AYA population.
The work was funded by the Australasian Leukaemia and Lymphoma Group. Several investigators had industry ties, including Dr. Greenwood, an adviser and/or researcher for Amgen, Pfizer, Servier, and Jazz.
The study team found that “an intensive pediatric ALL induction protocol can be delivered in an AYA [adolescent and young adult] cohort in a similar time frame to a pediatric population, suggesting that the inferior outcomes seen in AYA patients are more likely related to the biology of AYA ALL rather than intolerance of more intensive therapy,” said investigators led by Matthew Greenwood, MBBS, director of the stem cell transplant at the Royal North Shore Hospital, outside of Sydney
It’s been a long-standing question why intensive ALL regimens, which can be curative in children, don’t work as well in adolescents and young adults.
To see if tolerability and lack of adherence were issues, the investigators compared the treatment time lines of 82 AYA subjects with a median age of 22 years to the time lines of 608 children aged 1-17 years who were treated with the same intensive regimen (the ANZCHOG Study 8 protocol).
Induction/consolidation was equally deliverable in both populations. In the AYA group, 41.5% of subjects started the next phase of treatment – protocol M or high-risk (HR) therapy based on minimal residual disease (MRD) response to initial treatment – by day 94 versus 39.3% in the previous pediatric study (P = 0.77). The median time to protocol M/HR treatment was 96 days in AYAs and 98 days in children (P = .80).
About 52% of AYA subjects proceeded to HR therapy following induction/consolidation, versus just 10.7% in the pediatric study.
The investigators also found that a body mass index at or above 30 kg/m2 and the presence of MRD were both associated with worse disease-free and overall survival. “By addressing the factors predicting poorer outcomes from this study, we hope to significantly improve the outcomes for patients,” they said.
They noted that their work is the first to “report of the safety and efficacy of an MRD-stratified approach utilizing [Berlin-Frankfurt-Munich] HR therapy in an AYA cohort and show that this is a moderately efficacious strategy in patients who would otherwise be considered at high risk of relapse and death.”
Over a median follow-up of 44 months, estimated 3-year disease-free survival was 72.8% and estimated 3-year overall survival 74.9% in the AYA population.
The work was funded by the Australasian Leukaemia and Lymphoma Group. Several investigators had industry ties, including Dr. Greenwood, an adviser and/or researcher for Amgen, Pfizer, Servier, and Jazz.
The study team found that “an intensive pediatric ALL induction protocol can be delivered in an AYA [adolescent and young adult] cohort in a similar time frame to a pediatric population, suggesting that the inferior outcomes seen in AYA patients are more likely related to the biology of AYA ALL rather than intolerance of more intensive therapy,” said investigators led by Matthew Greenwood, MBBS, director of the stem cell transplant at the Royal North Shore Hospital, outside of Sydney
It’s been a long-standing question why intensive ALL regimens, which can be curative in children, don’t work as well in adolescents and young adults.
To see if tolerability and lack of adherence were issues, the investigators compared the treatment time lines of 82 AYA subjects with a median age of 22 years to the time lines of 608 children aged 1-17 years who were treated with the same intensive regimen (the ANZCHOG Study 8 protocol).
Induction/consolidation was equally deliverable in both populations. In the AYA group, 41.5% of subjects started the next phase of treatment – protocol M or high-risk (HR) therapy based on minimal residual disease (MRD) response to initial treatment – by day 94 versus 39.3% in the previous pediatric study (P = 0.77). The median time to protocol M/HR treatment was 96 days in AYAs and 98 days in children (P = .80).
About 52% of AYA subjects proceeded to HR therapy following induction/consolidation, versus just 10.7% in the pediatric study.
The investigators also found that a body mass index at or above 30 kg/m2 and the presence of MRD were both associated with worse disease-free and overall survival. “By addressing the factors predicting poorer outcomes from this study, we hope to significantly improve the outcomes for patients,” they said.
They noted that their work is the first to “report of the safety and efficacy of an MRD-stratified approach utilizing [Berlin-Frankfurt-Munich] HR therapy in an AYA cohort and show that this is a moderately efficacious strategy in patients who would otherwise be considered at high risk of relapse and death.”
Over a median follow-up of 44 months, estimated 3-year disease-free survival was 72.8% and estimated 3-year overall survival 74.9% in the AYA population.
The work was funded by the Australasian Leukaemia and Lymphoma Group. Several investigators had industry ties, including Dr. Greenwood, an adviser and/or researcher for Amgen, Pfizer, Servier, and Jazz.
FROM BLOOD ADVANCES
CAR T for ALL: Areas that need optimizing
The success of chimeric antigen receptor T (CAR T)-cell therapy for patients with relapsed/refractory B-cell acute lymphoblastic leukemia (B-ALL) has garnered much attention, but the field is still in its infancy – with toxicity and relapse rates remaining unacceptably high.
in the use of the therapy in this setting, according to review authors Vanessa A. Fabrizio, MD, a fellow at Duke University, Durham, N.C., and Kevin J. Curran, MD, a pediatric oncologist at Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York.
Based on their review of early pivotal clinical trials, relapse data, toxicities, and mechanisms to optimize CAR T-cell therapy, Dr. Fabrizio and Dr. Curran outlined several “practice points” and proposed a research agenda aimed at optimizing the use of CAR T-cell therapy for B-ALL (Best Pract Res Clin Haematol. 2021 Aug 27. doi: 10.1016/j.beha.2021.101305).
Practice points
CAR T-cell therapy has transformed the treatment of both pediatric and adult patients with relapsed/refractory (R/R) B-ALL, the authors said, adding that “[c]linical trial results across multiple institutions with different CAR constructs report significant response rates in treated patients.”
Dr. Fabrizio and Dr. Curran specifically note that only one product (tisagenlecleucel) is currently approved for the treatment of R/R B-ALL in patients under age 26 years. Further, the successful application of this therapy is limited by high relapse rates, significant toxicity in some cases, and challenges related to collection and production issues.
They contend that areas in which optimization of CAR T-cell therapy can occur include apheresis, production, chemotherapy bridging, pretreatment disease burden management, toxicity management, disease monitoring after therapy, and use of consolidative allogeneic hematopoietic stem cell transplantation.
Research agenda
Key ways to heighten the success of CAR T-cell therapy for B-ALL are the development of off-the-shelf CAR T-cell products and the selection of optimal T cells to enhance apheresis and production, they said, adding that research is needed on the use of bridging chemotherapy to reduce tumor burden.
Bridging chemotherapy has been shown to impact outcomes while minimizing toxicity, but it remains undefined.
“Prospective trials are required to determine if the optimization of lymphodepleting chemotherapy can improve outcomes, and if consolidative therapy with transplantation should be considered in select patients,” they wrote. “Continued efforts to improve this technology for patients is ongoing while remaining questions are being investigated.”
The authors acknowledge that CAR T-cell therapy has transformed the treatment landscape for both pediatric and adult patients with R/R B-ALL, but this extensive review of all published data on the subject shows that “the incidence of relapse among responders is unacceptably high, demonstrating the need to improve this therapy.”
In conclusion, they wrote: “To be effective following infusion, CAR T cells must expand, persist, exhibit enduring anti-tumor cytotoxicity, withstand and/or counteract an immunosuppressive tumor microenvironment, and overcome targeted tumor antigen escape. In designing CAR T cells for cancer immunotherapy, all of these factors must be harmonized to generate the optimal therapy,” noting that “[t]oxicity management and, ideally the prediction of toxicity in individualized patients, should continue to be a focus of ongoing efforts.”
Dr. Curran has received research support from Juno Therapeutics and Novartis, and has consulted, participated in advisory boards, or taken part in educational seminars for Juno Therapeutics, Novartis, and Mesoblast. Dr. Fabrizio reported having no conflict of interests.
The success of chimeric antigen receptor T (CAR T)-cell therapy for patients with relapsed/refractory B-cell acute lymphoblastic leukemia (B-ALL) has garnered much attention, but the field is still in its infancy – with toxicity and relapse rates remaining unacceptably high.
in the use of the therapy in this setting, according to review authors Vanessa A. Fabrizio, MD, a fellow at Duke University, Durham, N.C., and Kevin J. Curran, MD, a pediatric oncologist at Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York.
Based on their review of early pivotal clinical trials, relapse data, toxicities, and mechanisms to optimize CAR T-cell therapy, Dr. Fabrizio and Dr. Curran outlined several “practice points” and proposed a research agenda aimed at optimizing the use of CAR T-cell therapy for B-ALL (Best Pract Res Clin Haematol. 2021 Aug 27. doi: 10.1016/j.beha.2021.101305).
Practice points
CAR T-cell therapy has transformed the treatment of both pediatric and adult patients with relapsed/refractory (R/R) B-ALL, the authors said, adding that “[c]linical trial results across multiple institutions with different CAR constructs report significant response rates in treated patients.”
Dr. Fabrizio and Dr. Curran specifically note that only one product (tisagenlecleucel) is currently approved for the treatment of R/R B-ALL in patients under age 26 years. Further, the successful application of this therapy is limited by high relapse rates, significant toxicity in some cases, and challenges related to collection and production issues.
They contend that areas in which optimization of CAR T-cell therapy can occur include apheresis, production, chemotherapy bridging, pretreatment disease burden management, toxicity management, disease monitoring after therapy, and use of consolidative allogeneic hematopoietic stem cell transplantation.
Research agenda
Key ways to heighten the success of CAR T-cell therapy for B-ALL are the development of off-the-shelf CAR T-cell products and the selection of optimal T cells to enhance apheresis and production, they said, adding that research is needed on the use of bridging chemotherapy to reduce tumor burden.
Bridging chemotherapy has been shown to impact outcomes while minimizing toxicity, but it remains undefined.
“Prospective trials are required to determine if the optimization of lymphodepleting chemotherapy can improve outcomes, and if consolidative therapy with transplantation should be considered in select patients,” they wrote. “Continued efforts to improve this technology for patients is ongoing while remaining questions are being investigated.”
The authors acknowledge that CAR T-cell therapy has transformed the treatment landscape for both pediatric and adult patients with R/R B-ALL, but this extensive review of all published data on the subject shows that “the incidence of relapse among responders is unacceptably high, demonstrating the need to improve this therapy.”
In conclusion, they wrote: “To be effective following infusion, CAR T cells must expand, persist, exhibit enduring anti-tumor cytotoxicity, withstand and/or counteract an immunosuppressive tumor microenvironment, and overcome targeted tumor antigen escape. In designing CAR T cells for cancer immunotherapy, all of these factors must be harmonized to generate the optimal therapy,” noting that “[t]oxicity management and, ideally the prediction of toxicity in individualized patients, should continue to be a focus of ongoing efforts.”
Dr. Curran has received research support from Juno Therapeutics and Novartis, and has consulted, participated in advisory boards, or taken part in educational seminars for Juno Therapeutics, Novartis, and Mesoblast. Dr. Fabrizio reported having no conflict of interests.
The success of chimeric antigen receptor T (CAR T)-cell therapy for patients with relapsed/refractory B-cell acute lymphoblastic leukemia (B-ALL) has garnered much attention, but the field is still in its infancy – with toxicity and relapse rates remaining unacceptably high.
in the use of the therapy in this setting, according to review authors Vanessa A. Fabrizio, MD, a fellow at Duke University, Durham, N.C., and Kevin J. Curran, MD, a pediatric oncologist at Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College, New York.
Based on their review of early pivotal clinical trials, relapse data, toxicities, and mechanisms to optimize CAR T-cell therapy, Dr. Fabrizio and Dr. Curran outlined several “practice points” and proposed a research agenda aimed at optimizing the use of CAR T-cell therapy for B-ALL (Best Pract Res Clin Haematol. 2021 Aug 27. doi: 10.1016/j.beha.2021.101305).
Practice points
CAR T-cell therapy has transformed the treatment of both pediatric and adult patients with relapsed/refractory (R/R) B-ALL, the authors said, adding that “[c]linical trial results across multiple institutions with different CAR constructs report significant response rates in treated patients.”
Dr. Fabrizio and Dr. Curran specifically note that only one product (tisagenlecleucel) is currently approved for the treatment of R/R B-ALL in patients under age 26 years. Further, the successful application of this therapy is limited by high relapse rates, significant toxicity in some cases, and challenges related to collection and production issues.
They contend that areas in which optimization of CAR T-cell therapy can occur include apheresis, production, chemotherapy bridging, pretreatment disease burden management, toxicity management, disease monitoring after therapy, and use of consolidative allogeneic hematopoietic stem cell transplantation.
Research agenda
Key ways to heighten the success of CAR T-cell therapy for B-ALL are the development of off-the-shelf CAR T-cell products and the selection of optimal T cells to enhance apheresis and production, they said, adding that research is needed on the use of bridging chemotherapy to reduce tumor burden.
Bridging chemotherapy has been shown to impact outcomes while minimizing toxicity, but it remains undefined.
“Prospective trials are required to determine if the optimization of lymphodepleting chemotherapy can improve outcomes, and if consolidative therapy with transplantation should be considered in select patients,” they wrote. “Continued efforts to improve this technology for patients is ongoing while remaining questions are being investigated.”
The authors acknowledge that CAR T-cell therapy has transformed the treatment landscape for both pediatric and adult patients with R/R B-ALL, but this extensive review of all published data on the subject shows that “the incidence of relapse among responders is unacceptably high, demonstrating the need to improve this therapy.”
In conclusion, they wrote: “To be effective following infusion, CAR T cells must expand, persist, exhibit enduring anti-tumor cytotoxicity, withstand and/or counteract an immunosuppressive tumor microenvironment, and overcome targeted tumor antigen escape. In designing CAR T cells for cancer immunotherapy, all of these factors must be harmonized to generate the optimal therapy,” noting that “[t]oxicity management and, ideally the prediction of toxicity in individualized patients, should continue to be a focus of ongoing efforts.”
Dr. Curran has received research support from Juno Therapeutics and Novartis, and has consulted, participated in advisory boards, or taken part in educational seminars for Juno Therapeutics, Novartis, and Mesoblast. Dr. Fabrizio reported having no conflict of interests.
FROM BEST PRACTICE & RESEARCH CLINICAL HAEMATOLOGY