Leukemia, Myelodysplasia, Transplantation

For older, unfit patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL), first-line treatment with the all-oral combination of ibrutinib (Imbruvica) and venetoclax (Venclexta) was associated with superior progression-free survival, compared with chlorambucil and obinutuzumab (Gazyva), results of the phase 3 GLOW trial showed.

Among 211 patients with CLL/SLL who were 65 or older, or younger patients with a high comorbidity burden, the median progression-free survival (PFS) after 27.7 months of follow-up was not reached for patients treated with a fixed duration combination of ibrutinib plus venetoclax (I+V), compared with 21 months for patients who received chlorambucil plus obinutuzumab (Clb+O), reported Arnon P. Kater, MD, PhD, from Amsterdam University Medical Centers.

The oral combination was also associated with a higher rate of undetectable minimal residual disease (MRD) 3 months after the end of treatment, at 51.9% vs. 17.1% with Clb+O, he said in a late-breaking abstract presented during the European Hematology Association annual meeting (Abstract LB1902).

“Overall, the results from GLOW support a positive clinical profile of I+V as an all-oral, once-daily, fixed-duration regimen in older patients with newly diagnosed CLL,” he said.
 

A low bar

But the bar for success in the GLOW trial may have been set low, with the older combination of chlorambucil plus obinutuzumab used as the comparator, rather than a more contemporary regimen, said Clive S. Zent , MD, from the Wilmot Cancer Institute at the University of Rochester (New York) Medical Center, who was not involved in the study.

“Really, nobody in this country that I’m aware of, certainly not in academic medicine, would be using chlorambucil and obinutuzumab or rituximab for standard of care,” Dr. Zent said in an interview.

“This is like comparing a mule cart to a Tesla,” he said.

Apart from possibly providing a rationale for using ibrutinib and venetoclax in this population, the GLOW results do not add much beyond that already in the CAPTIVE MRD trial, he added.

“What we’re really interested in, is ibrutinib and venetoclax better than ibrutinib alone or venetoclax alone? And that has not been asked or answered yet,” he said.

Dr. Zent acknowledged that the combination works very well and is well tolerated, and the idea of fixed duration therapy is attractive, as are the long-term outcomes for many patients following cessation of therapy.

“But remember, if you take ibrutinib, you’ve got a 90% chance of going into remission, and an over 80% chance of being in remission 5 years later, so that’s pretty good as well,” he said.

Paolo P. Ghia, MD, from Univerista Vita-Salute San Raffaele in Milan, who has studied fixed-duration I+V in younger patients with CLL in the CAPTIVATE trial agreed that “in general, there is very little role for chemoimmunotherapy in CLL.”

But Dr. Ghia, who was not involved in the GLOW study, said in an interview that the results add to the growing body of evidence of the efficacy and safety of ibrutinib -venetoclax in a wide range of patients.

“Overall between the two studies [CAPTIVATE and GLOW] we have now over 400 patients who have been treated with the combination, and the message is rather similar in the two studies: you have a high frequency of undetectable MRD in peripheral blood and in the bone marrow, with a high concordance between the two tissues, and in particular we have a durability of the response,” he said.
 

GLOW details

Dr. Kater noted that ibrutinib and venetoclax have distinct and complementary modes of action, with ibrutinib mobilizing CLL cells out of their “protective lymphoid niches” and inhibiting their proliferation, as well as accelerating apoptosis by sensitizing cells to inhibition by the anti–B-cell lymphoma 2 (BCL-2) agent venetoclax. The combination leads to high levels of MRD negative by eliminating subpopulations of resting and dividing CLL cells.

The GLOW investigators enrolled 211 patients who were 65 or older, or were younger than 65 with a cumulative illness rating scale (CIRS) score of greater than 6, or creatinine clearance rate of less than 70 mL/min, and no known deletion 17p (del17p) or TP53 mutation.

The patients all had Eastern Cooperative Oncology Group performance status scores of 0-2.

After stratification by immunoglobulin heavy chain variable (IGHV) region genes and presence of deletion 11q (del11q), the patients were randomly assigned to either a three cycle run-in with ibrutinib 420 mg daily followed by ibrutinib plus venetoclax ramped up from 20 to 400 mg, or to chlorambucil 0.5 mg/kg on days and 15 for six cycles, and obinutuzumab 1,000 mg on days 1,2, 8, and 15 of cycle 1, and day 1 of cycles 2-6.

About one-third of patients in each study arm were 75 or older. Baseline characteristics were generally similar between the arms, except for a higher frequency of CIRS scores above 6 in the I+V arm, and a higher frequency of elevated lactate dehydrogenase in the Clb+O arm.
 

Superior PFS

As noted, the primary endpoint of PFS as assessed by independent review committee (IRC) after 27.7 months of follow-up had not been reached in I+V arm, compared with 21 months in the Clb+O arm, translating into a hazard ratio or progression with I+V of 0.21 (P < .0001). Investigator-assessed PFS was similar, with an HR of 2.07 (P < .0001).

PFS was superior with I+V across all subgroups, including age, baseline performance status. CIRS total score, Rai stage, bulky disease, elevated LDH at baseline, IGHV mutated or unmutated, and presence or absence of del(11q).

IRC-assessed combined complete response (CR) or CR with incomplete recovery of blood counts (CRi) rates were 38.7% with I+V vs. 11.4% with Clb+O (P < .0001).

Responses were also more durable with the oral combination, with 90% of patients having a sustained IRC-assessed response at 24 months, compared with 41% in the chemoimmunotherapy arm.

Rates of undetectable MRD by next-generation sequencing 3 months after the end of treatment were also significantly higher with I+V in both bone marrow (51.9% vs. 17.1%, respectively, P < .0001) and peripheral blood (54.7% vs. 39%, P = .0259). ­

One year post treatment 49% of patients assigned to I+V had undetectable MRD in peripheral blood, compared with 12% of patients assigned to Clb+O).
 

Safety

In all, 11 patients assigned to I+V discontinued treatment because of adverse events, compared with 2 in the Clb+O arm. Two patients in the I+V arm (1.9%) discontinued ibrutinib because of atrial fibrillation (AF). Serious adverse events in 5% or more of patients that were more frequent with I+V include infections (12.3% vs. 8.6% and AF (6.6% vs. o%). The tumor lysis syndrome (TLS) was not seen in the I+V arm, but occurred in 5.7% of patients in the Clb+O arm.

There were a total of 11 deaths in the I+V arm and 12 in the Clb+O arm during treatment or follow-up.

Causes of death were generally similar between the arms, with infections and cardiac events being the most common causes, Dr. Kater said.

Of the four deaths that occurred during ibrutinib lead-in, one was due to infection, one to metastatic carcinoma, and two due to cardiac disorders. Of the three that occurred in the I+V arm during treatment, two were from sudden death, and one from a nervous system disorder. Four patients in this arm died during follow-up, two from infections, one from sudden death, and one from progressive disease with Richter transformation.

In the Clb+O arm, one patient died during treatment from an infection and one died from hepatobiliary disease. Of the 10 that died during follow-up, 6 died from infections/infestations, 2 from cardiac disorders, and 1 each from nervous system and respiratory/thoracic/mediastinal disorder.

The study was supported by Janssen Research & Development. Dr. Kater disclosed advisory board activity, research committee, and steering committee participation for Janssen, and similar relationships with others. Dr. Zent disclosed research funding to the University of Rochester from AstraZenca/Acerta and TG Therpeutics. Dr. Ghia disclosed consultancy, honoraria, travel expenses, and research funding from Janssen and others.

For older, unfit patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL), first-line treatment with the all-oral combination of ibrutinib (Imbruvica) and venetoclax (Venclexta) was associated with superior progression-free survival, compared with chlorambucil and obinutuzumab (Gazyva), results of the phase 3 GLOW trial showed.

Among 211 patients with CLL/SLL who were 65 or older, or younger patients with a high comorbidity burden, the median progression-free survival (PFS) after 27.7 months of follow-up was not reached for patients treated with a fixed duration combination of ibrutinib plus venetoclax (I+V), compared with 21 months for patients who received chlorambucil plus obinutuzumab (Clb+O), reported Arnon P. Kater, MD, PhD, from Amsterdam University Medical Centers.

The oral combination was also associated with a higher rate of undetectable minimal residual disease (MRD) 3 months after the end of treatment, at 51.9% vs. 17.1% with Clb+O, he said in a late-breaking abstract presented during the European Hematology Association annual meeting (Abstract LB1902).

“Overall, the results from GLOW support a positive clinical profile of I+V as an all-oral, once-daily, fixed-duration regimen in older patients with newly diagnosed CLL,” he said.
 

A low bar

But the bar for success in the GLOW trial may have been set low, with the older combination of chlorambucil plus obinutuzumab used as the comparator, rather than a more contemporary regimen, said Clive S. Zent , MD, from the Wilmot Cancer Institute at the University of Rochester (New York) Medical Center, who was not involved in the study.

“Really, nobody in this country that I’m aware of, certainly not in academic medicine, would be using chlorambucil and obinutuzumab or rituximab for standard of care,” Dr. Zent said in an interview.

“This is like comparing a mule cart to a Tesla,” he said.

Apart from possibly providing a rationale for using ibrutinib and venetoclax in this population, the GLOW results do not add much beyond that already in the CAPTIVE MRD trial, he added.

“What we’re really interested in, is ibrutinib and venetoclax better than ibrutinib alone or venetoclax alone? And that has not been asked or answered yet,” he said.

Dr. Zent acknowledged that the combination works very well and is well tolerated, and the idea of fixed duration therapy is attractive, as are the long-term outcomes for many patients following cessation of therapy.

“But remember, if you take ibrutinib, you’ve got a 90% chance of going into remission, and an over 80% chance of being in remission 5 years later, so that’s pretty good as well,” he said.

Paolo P. Ghia, MD, from Univerista Vita-Salute San Raffaele in Milan, who has studied fixed-duration I+V in younger patients with CLL in the CAPTIVATE trial agreed that “in general, there is very little role for chemoimmunotherapy in CLL.”

But Dr. Ghia, who was not involved in the GLOW study, said in an interview that the results add to the growing body of evidence of the efficacy and safety of ibrutinib -venetoclax in a wide range of patients.

“Overall between the two studies [CAPTIVATE and GLOW] we have now over 400 patients who have been treated with the combination, and the message is rather similar in the two studies: you have a high frequency of undetectable MRD in peripheral blood and in the bone marrow, with a high concordance between the two tissues, and in particular we have a durability of the response,” he said.
 

GLOW details

Dr. Kater noted that ibrutinib and venetoclax have distinct and complementary modes of action, with ibrutinib mobilizing CLL cells out of their “protective lymphoid niches” and inhibiting their proliferation, as well as accelerating apoptosis by sensitizing cells to inhibition by the anti–B-cell lymphoma 2 (BCL-2) agent venetoclax. The combination leads to high levels of MRD negative by eliminating subpopulations of resting and dividing CLL cells.

The GLOW investigators enrolled 211 patients who were 65 or older, or were younger than 65 with a cumulative illness rating scale (CIRS) score of greater than 6, or creatinine clearance rate of less than 70 mL/min, and no known deletion 17p (del17p) or TP53 mutation.

The patients all had Eastern Cooperative Oncology Group performance status scores of 0-2.

After stratification by immunoglobulin heavy chain variable (IGHV) region genes and presence of deletion 11q (del11q), the patients were randomly assigned to either a three cycle run-in with ibrutinib 420 mg daily followed by ibrutinib plus venetoclax ramped up from 20 to 400 mg, or to chlorambucil 0.5 mg/kg on days and 15 for six cycles, and obinutuzumab 1,000 mg on days 1,2, 8, and 15 of cycle 1, and day 1 of cycles 2-6.

About one-third of patients in each study arm were 75 or older. Baseline characteristics were generally similar between the arms, except for a higher frequency of CIRS scores above 6 in the I+V arm, and a higher frequency of elevated lactate dehydrogenase in the Clb+O arm.
 

Superior PFS

As noted, the primary endpoint of PFS as assessed by independent review committee (IRC) after 27.7 months of follow-up had not been reached in I+V arm, compared with 21 months in the Clb+O arm, translating into a hazard ratio or progression with I+V of 0.21 (P < .0001). Investigator-assessed PFS was similar, with an HR of 2.07 (P < .0001).

PFS was superior with I+V across all subgroups, including age, baseline performance status. CIRS total score, Rai stage, bulky disease, elevated LDH at baseline, IGHV mutated or unmutated, and presence or absence of del(11q).

IRC-assessed combined complete response (CR) or CR with incomplete recovery of blood counts (CRi) rates were 38.7% with I+V vs. 11.4% with Clb+O (P < .0001).

Responses were also more durable with the oral combination, with 90% of patients having a sustained IRC-assessed response at 24 months, compared with 41% in the chemoimmunotherapy arm.

Rates of undetectable MRD by next-generation sequencing 3 months after the end of treatment were also significantly higher with I+V in both bone marrow (51.9% vs. 17.1%, respectively, P < .0001) and peripheral blood (54.7% vs. 39%, P = .0259). ­

One year post treatment 49% of patients assigned to I+V had undetectable MRD in peripheral blood, compared with 12% of patients assigned to Clb+O).
 

Safety

In all, 11 patients assigned to I+V discontinued treatment because of adverse events, compared with 2 in the Clb+O arm. Two patients in the I+V arm (1.9%) discontinued ibrutinib because of atrial fibrillation (AF). Serious adverse events in 5% or more of patients that were more frequent with I+V include infections (12.3% vs. 8.6% and AF (6.6% vs. o%). The tumor lysis syndrome (TLS) was not seen in the I+V arm, but occurred in 5.7% of patients in the Clb+O arm.

There were a total of 11 deaths in the I+V arm and 12 in the Clb+O arm during treatment or follow-up.

Causes of death were generally similar between the arms, with infections and cardiac events being the most common causes, Dr. Kater said.

Of the four deaths that occurred during ibrutinib lead-in, one was due to infection, one to metastatic carcinoma, and two due to cardiac disorders. Of the three that occurred in the I+V arm during treatment, two were from sudden death, and one from a nervous system disorder. Four patients in this arm died during follow-up, two from infections, one from sudden death, and one from progressive disease with Richter transformation.

In the Clb+O arm, one patient died during treatment from an infection and one died from hepatobiliary disease. Of the 10 that died during follow-up, 6 died from infections/infestations, 2 from cardiac disorders, and 1 each from nervous system and respiratory/thoracic/mediastinal disorder.

The study was supported by Janssen Research & Development. Dr. Kater disclosed advisory board activity, research committee, and steering committee participation for Janssen, and similar relationships with others. Dr. Zent disclosed research funding to the University of Rochester from AstraZenca/Acerta and TG Therpeutics. Dr. Ghia disclosed consultancy, honoraria, travel expenses, and research funding from Janssen and others.

For older, unfit patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL), first-line treatment with the all-oral combination of ibrutinib (Imbruvica) and venetoclax (Venclexta) was associated with superior progression-free survival, compared with chlorambucil and obinutuzumab (Gazyva), results of the phase 3 GLOW trial showed.

Among 211 patients with CLL/SLL who were 65 or older, or younger patients with a high comorbidity burden, the median progression-free survival (PFS) after 27.7 months of follow-up was not reached for patients treated with a fixed duration combination of ibrutinib plus venetoclax (I+V), compared with 21 months for patients who received chlorambucil plus obinutuzumab (Clb+O), reported Arnon P. Kater, MD, PhD, from Amsterdam University Medical Centers.

The oral combination was also associated with a higher rate of undetectable minimal residual disease (MRD) 3 months after the end of treatment, at 51.9% vs. 17.1% with Clb+O, he said in a late-breaking abstract presented during the European Hematology Association annual meeting (Abstract LB1902).

“Overall, the results from GLOW support a positive clinical profile of I+V as an all-oral, once-daily, fixed-duration regimen in older patients with newly diagnosed CLL,” he said.
 

A low bar

But the bar for success in the GLOW trial may have been set low, with the older combination of chlorambucil plus obinutuzumab used as the comparator, rather than a more contemporary regimen, said Clive S. Zent , MD, from the Wilmot Cancer Institute at the University of Rochester (New York) Medical Center, who was not involved in the study.

“Really, nobody in this country that I’m aware of, certainly not in academic medicine, would be using chlorambucil and obinutuzumab or rituximab for standard of care,” Dr. Zent said in an interview.

“This is like comparing a mule cart to a Tesla,” he said.

Apart from possibly providing a rationale for using ibrutinib and venetoclax in this population, the GLOW results do not add much beyond that already in the CAPTIVE MRD trial, he added.

“What we’re really interested in, is ibrutinib and venetoclax better than ibrutinib alone or venetoclax alone? And that has not been asked or answered yet,” he said.

Dr. Zent acknowledged that the combination works very well and is well tolerated, and the idea of fixed duration therapy is attractive, as are the long-term outcomes for many patients following cessation of therapy.

“But remember, if you take ibrutinib, you’ve got a 90% chance of going into remission, and an over 80% chance of being in remission 5 years later, so that’s pretty good as well,” he said.

Paolo P. Ghia, MD, from Univerista Vita-Salute San Raffaele in Milan, who has studied fixed-duration I+V in younger patients with CLL in the CAPTIVATE trial agreed that “in general, there is very little role for chemoimmunotherapy in CLL.”

But Dr. Ghia, who was not involved in the GLOW study, said in an interview that the results add to the growing body of evidence of the efficacy and safety of ibrutinib -venetoclax in a wide range of patients.

“Overall between the two studies [CAPTIVATE and GLOW] we have now over 400 patients who have been treated with the combination, and the message is rather similar in the two studies: you have a high frequency of undetectable MRD in peripheral blood and in the bone marrow, with a high concordance between the two tissues, and in particular we have a durability of the response,” he said.
 

GLOW details

Dr. Kater noted that ibrutinib and venetoclax have distinct and complementary modes of action, with ibrutinib mobilizing CLL cells out of their “protective lymphoid niches” and inhibiting their proliferation, as well as accelerating apoptosis by sensitizing cells to inhibition by the anti–B-cell lymphoma 2 (BCL-2) agent venetoclax. The combination leads to high levels of MRD negative by eliminating subpopulations of resting and dividing CLL cells.

The GLOW investigators enrolled 211 patients who were 65 or older, or were younger than 65 with a cumulative illness rating scale (CIRS) score of greater than 6, or creatinine clearance rate of less than 70 mL/min, and no known deletion 17p (del17p) or TP53 mutation.

The patients all had Eastern Cooperative Oncology Group performance status scores of 0-2.

After stratification by immunoglobulin heavy chain variable (IGHV) region genes and presence of deletion 11q (del11q), the patients were randomly assigned to either a three cycle run-in with ibrutinib 420 mg daily followed by ibrutinib plus venetoclax ramped up from 20 to 400 mg, or to chlorambucil 0.5 mg/kg on days and 15 for six cycles, and obinutuzumab 1,000 mg on days 1,2, 8, and 15 of cycle 1, and day 1 of cycles 2-6.

About one-third of patients in each study arm were 75 or older. Baseline characteristics were generally similar between the arms, except for a higher frequency of CIRS scores above 6 in the I+V arm, and a higher frequency of elevated lactate dehydrogenase in the Clb+O arm.
 

Superior PFS

As noted, the primary endpoint of PFS as assessed by independent review committee (IRC) after 27.7 months of follow-up had not been reached in I+V arm, compared with 21 months in the Clb+O arm, translating into a hazard ratio or progression with I+V of 0.21 (P < .0001). Investigator-assessed PFS was similar, with an HR of 2.07 (P < .0001).

PFS was superior with I+V across all subgroups, including age, baseline performance status. CIRS total score, Rai stage, bulky disease, elevated LDH at baseline, IGHV mutated or unmutated, and presence or absence of del(11q).

IRC-assessed combined complete response (CR) or CR with incomplete recovery of blood counts (CRi) rates were 38.7% with I+V vs. 11.4% with Clb+O (P < .0001).

Responses were also more durable with the oral combination, with 90% of patients having a sustained IRC-assessed response at 24 months, compared with 41% in the chemoimmunotherapy arm.

Rates of undetectable MRD by next-generation sequencing 3 months after the end of treatment were also significantly higher with I+V in both bone marrow (51.9% vs. 17.1%, respectively, P < .0001) and peripheral blood (54.7% vs. 39%, P = .0259). ­

One year post treatment 49% of patients assigned to I+V had undetectable MRD in peripheral blood, compared with 12% of patients assigned to Clb+O).
 

Safety

In all, 11 patients assigned to I+V discontinued treatment because of adverse events, compared with 2 in the Clb+O arm. Two patients in the I+V arm (1.9%) discontinued ibrutinib because of atrial fibrillation (AF). Serious adverse events in 5% or more of patients that were more frequent with I+V include infections (12.3% vs. 8.6% and AF (6.6% vs. o%). The tumor lysis syndrome (TLS) was not seen in the I+V arm, but occurred in 5.7% of patients in the Clb+O arm.

There were a total of 11 deaths in the I+V arm and 12 in the Clb+O arm during treatment or follow-up.

Causes of death were generally similar between the arms, with infections and cardiac events being the most common causes, Dr. Kater said.

Of the four deaths that occurred during ibrutinib lead-in, one was due to infection, one to metastatic carcinoma, and two due to cardiac disorders. Of the three that occurred in the I+V arm during treatment, two were from sudden death, and one from a nervous system disorder. Four patients in this arm died during follow-up, two from infections, one from sudden death, and one from progressive disease with Richter transformation.

In the Clb+O arm, one patient died during treatment from an infection and one died from hepatobiliary disease. Of the 10 that died during follow-up, 6 died from infections/infestations, 2 from cardiac disorders, and 1 each from nervous system and respiratory/thoracic/mediastinal disorder.

The study was supported by Janssen Research & Development. Dr. Kater disclosed advisory board activity, research committee, and steering committee participation for Janssen, and similar relationships with others. Dr. Zent disclosed research funding to the University of Rochester from AstraZenca/Acerta and TG Therpeutics. Dr. Ghia disclosed consultancy, honoraria, travel expenses, and research funding from Janssen and others.

Data from a small retrospective study suggest that venetoclax-based regimens may have activity against relapsed or refractory T-lineage acute lymphoblastic leukemia (T-ALL) in children and young adults.

Among seven patients with T-ALL treated with venetoclax (Venclexta) in combination with chemotherapy, four had complete remissions and one had a CR with incomplete recovery of blood counts (CRi), and all four patients had undetectable minimal residual disease (MRD), reported pediatric hematology/oncology fellow Amber Gibson, MD, and colleagues from the University of Texas MD Anderson Cancer Center Children’s Cancer Hospital in Houston.

“This single-institution retrospective review found that venetoclax was safe and well tolerated in combination chemotherapy regimens, thrombocytopenia and neutropenia were the most common toxicities identified, [and] venetoclax should be considered for patients with refractory T-cell ALL and investigated as up-front therapy for this patient population,” they wrote in the abstract accompanying a poster presentation at the annual meeting of the American Society of Pediatric Hematology/Oncology.

Children with relapsed T-ALL and T-lymphoblastic lymphoma (T-LL) have a dismal prognosis, with a 3-year event-free survival rate less than 10%, according to the researchers.

To see whether venetoclax, an inhibitor of the antiapoptotic protein B-cell lymphoma-2 (BCL-2), could improve outcomes for children with ALL, the investigators conducted a retrospective chart review of the safety and efficacy of venetoclax in young patients with relapsed/refractory ALL/LL who received the drug at their center.

They identified 10 patients aged 6-21 years (median, 18), 5 of whom had T-ALL (1 with early T-cell precursor ALL), 2 with T-LL, and 3 with B-lineage ALL (B-ALL).

The median number of prior lines of therapy was 3.5. Three of the 10 patients had received hematopoietic stem cell transplants, and the 3 patients with B-ALL had all received prior CD19-directed chimeric antigen receptor T-cell (CAR T) therapy. One of these patients received a dual CD19/CD22 CAR T product, one received CD19-directed blinotumumab.

There were no new safety signals with venetoclax, no treatment-related deaths, and no deaths within 30 days of starting venetoclax.

All 10 patients had grade 4 thrombocytopenias, 6 had grade 4 neutropenia, 3 had grade 4 febrile neutropenia, 2 had grade 4 anemia, and 1 each had grade 4 sepsis, pneumonia, or coagulopathy.

As noted, there were three CRs and one CRi, all in patients with T-ALL. All four of these patients were MRD negative by flow cytometry at a median of 22 days. The median duration of response was 17.4 months (range, 2-18 months).

At the most recent follow-up five patients were still alive, three without disease, one was still undergoing treatment, and one was alive following an allogeneic HSCT.
 

Early studies

Shilpa Shahani, MD, a pediatric oncologist and assistant clinical professor of pediatrics at City of Hope in Duarte, Calif., who was not involved in the study, said that there are early studies exploring the use of venetoclax in infants with ALL.

“Venetoclax is a BCL-2 inhibitor that is pretty well tolerated, but you can also have cytopenias with it,” she said.

She noted that it is not typically used in the frontline setting in pediatric populations, but may be considered for patients with difficult-to-treat disease or for whom the relatively good toxicity profile might be appropriate.

The MD Anderson investigators did not report a funding source. The authors and Dr. Shahani reported no relevant conflicts of interest.

Data from a small retrospective study suggest that venetoclax-based regimens may have activity against relapsed or refractory T-lineage acute lymphoblastic leukemia (T-ALL) in children and young adults.

Among seven patients with T-ALL treated with venetoclax (Venclexta) in combination with chemotherapy, four had complete remissions and one had a CR with incomplete recovery of blood counts (CRi), and all four patients had undetectable minimal residual disease (MRD), reported pediatric hematology/oncology fellow Amber Gibson, MD, and colleagues from the University of Texas MD Anderson Cancer Center Children’s Cancer Hospital in Houston.

“This single-institution retrospective review found that venetoclax was safe and well tolerated in combination chemotherapy regimens, thrombocytopenia and neutropenia were the most common toxicities identified, [and] venetoclax should be considered for patients with refractory T-cell ALL and investigated as up-front therapy for this patient population,” they wrote in the abstract accompanying a poster presentation at the annual meeting of the American Society of Pediatric Hematology/Oncology.

Children with relapsed T-ALL and T-lymphoblastic lymphoma (T-LL) have a dismal prognosis, with a 3-year event-free survival rate less than 10%, according to the researchers.

To see whether venetoclax, an inhibitor of the antiapoptotic protein B-cell lymphoma-2 (BCL-2), could improve outcomes for children with ALL, the investigators conducted a retrospective chart review of the safety and efficacy of venetoclax in young patients with relapsed/refractory ALL/LL who received the drug at their center.

They identified 10 patients aged 6-21 years (median, 18), 5 of whom had T-ALL (1 with early T-cell precursor ALL), 2 with T-LL, and 3 with B-lineage ALL (B-ALL).

The median number of prior lines of therapy was 3.5. Three of the 10 patients had received hematopoietic stem cell transplants, and the 3 patients with B-ALL had all received prior CD19-directed chimeric antigen receptor T-cell (CAR T) therapy. One of these patients received a dual CD19/CD22 CAR T product, one received CD19-directed blinotumumab.

There were no new safety signals with venetoclax, no treatment-related deaths, and no deaths within 30 days of starting venetoclax.

All 10 patients had grade 4 thrombocytopenias, 6 had grade 4 neutropenia, 3 had grade 4 febrile neutropenia, 2 had grade 4 anemia, and 1 each had grade 4 sepsis, pneumonia, or coagulopathy.

As noted, there were three CRs and one CRi, all in patients with T-ALL. All four of these patients were MRD negative by flow cytometry at a median of 22 days. The median duration of response was 17.4 months (range, 2-18 months).

At the most recent follow-up five patients were still alive, three without disease, one was still undergoing treatment, and one was alive following an allogeneic HSCT.
 

Early studies

Shilpa Shahani, MD, a pediatric oncologist and assistant clinical professor of pediatrics at City of Hope in Duarte, Calif., who was not involved in the study, said that there are early studies exploring the use of venetoclax in infants with ALL.

“Venetoclax is a BCL-2 inhibitor that is pretty well tolerated, but you can also have cytopenias with it,” she said.

She noted that it is not typically used in the frontline setting in pediatric populations, but may be considered for patients with difficult-to-treat disease or for whom the relatively good toxicity profile might be appropriate.

The MD Anderson investigators did not report a funding source. The authors and Dr. Shahani reported no relevant conflicts of interest.

Data from a small retrospective study suggest that venetoclax-based regimens may have activity against relapsed or refractory T-lineage acute lymphoblastic leukemia (T-ALL) in children and young adults.

Among seven patients with T-ALL treated with venetoclax (Venclexta) in combination with chemotherapy, four had complete remissions and one had a CR with incomplete recovery of blood counts (CRi), and all four patients had undetectable minimal residual disease (MRD), reported pediatric hematology/oncology fellow Amber Gibson, MD, and colleagues from the University of Texas MD Anderson Cancer Center Children’s Cancer Hospital in Houston.

“This single-institution retrospective review found that venetoclax was safe and well tolerated in combination chemotherapy regimens, thrombocytopenia and neutropenia were the most common toxicities identified, [and] venetoclax should be considered for patients with refractory T-cell ALL and investigated as up-front therapy for this patient population,” they wrote in the abstract accompanying a poster presentation at the annual meeting of the American Society of Pediatric Hematology/Oncology.

Children with relapsed T-ALL and T-lymphoblastic lymphoma (T-LL) have a dismal prognosis, with a 3-year event-free survival rate less than 10%, according to the researchers.

To see whether venetoclax, an inhibitor of the antiapoptotic protein B-cell lymphoma-2 (BCL-2), could improve outcomes for children with ALL, the investigators conducted a retrospective chart review of the safety and efficacy of venetoclax in young patients with relapsed/refractory ALL/LL who received the drug at their center.

They identified 10 patients aged 6-21 years (median, 18), 5 of whom had T-ALL (1 with early T-cell precursor ALL), 2 with T-LL, and 3 with B-lineage ALL (B-ALL).

The median number of prior lines of therapy was 3.5. Three of the 10 patients had received hematopoietic stem cell transplants, and the 3 patients with B-ALL had all received prior CD19-directed chimeric antigen receptor T-cell (CAR T) therapy. One of these patients received a dual CD19/CD22 CAR T product, one received CD19-directed blinotumumab.

There were no new safety signals with venetoclax, no treatment-related deaths, and no deaths within 30 days of starting venetoclax.

All 10 patients had grade 4 thrombocytopenias, 6 had grade 4 neutropenia, 3 had grade 4 febrile neutropenia, 2 had grade 4 anemia, and 1 each had grade 4 sepsis, pneumonia, or coagulopathy.

As noted, there were three CRs and one CRi, all in patients with T-ALL. All four of these patients were MRD negative by flow cytometry at a median of 22 days. The median duration of response was 17.4 months (range, 2-18 months).

At the most recent follow-up five patients were still alive, three without disease, one was still undergoing treatment, and one was alive following an allogeneic HSCT.
 

Early studies

Shilpa Shahani, MD, a pediatric oncologist and assistant clinical professor of pediatrics at City of Hope in Duarte, Calif., who was not involved in the study, said that there are early studies exploring the use of venetoclax in infants with ALL.

“Venetoclax is a BCL-2 inhibitor that is pretty well tolerated, but you can also have cytopenias with it,” she said.

She noted that it is not typically used in the frontline setting in pediatric populations, but may be considered for patients with difficult-to-treat disease or for whom the relatively good toxicity profile might be appropriate.

The MD Anderson investigators did not report a funding source. The authors and Dr. Shahani reported no relevant conflicts of interest.

Even in the age of intensive therapy and extensive risk stratification, there are small but significant differences in outcomes between boys and girls with B-lineage acute lymphoblastic leukemia (B-ALL).

This finding comes from a review of 10 years of clinical trials by the Children’s Oncology Group (COG), which showed that, among patients with B-ALL, 5-year event-free survival (EFS) and overall survival (OS) were inferior with boys, compared with girls, even when adjusted for prognostic factors, reported Sumit Gupta, MD, PhD, FRCPC, from the Hospital for Sick Children in Toronto.

“Inferior outcomes, although small in absolute terms, continue to exist among boys versus girls despite modern therapy and after adjusting for other risk factors. These persist also despite the longer duration of therapy among boys,” he said in an oral abstract presentation during the annual meeting of the American Society of Pediatric Hematology/Oncology. (Abstract 2025).

Among pediatric patients with T-cell lineage ALL (T-ALL), however, there were no significant sex-based differences in either EFS or OS, he said.

Although survival for children with ALL has continued to improve, previous studies found inferior survival outcomes in boys, and suggested that the difference might be explained by imbalances in risk factors.

To see whether sex-based disparities persist with modern intensive therapy protocols after adjustment for risk factors, and to determine whether there are sex-based differences in toxicities or patterns of treatment failure, Dr. Gupta and colleagues created a cohort of all patients age 1-30 years enrolled in frontline COG trial for B-ALL and T-ALL from 2004 to 2014.

During this period, boys received an extra year of maintenance. Cranial radiation was limited to B-ALL patients with slow treatment responses and central nervous system status 3, signifying definite CNS involvement. Among patients with T-ALL, cranial radiation was given to all intermediate- and high-risk patients.
 

Sex differences small, but significant

The investigators identified a total of 8,202 patients (4,463 males and 3,739 females) with B-ALL, and 1,562 (1,161 males and 401 females) with T-ALL. Boys were likely to be older (P < .0001), and to have a small but significantly greater likelihood of having unfavorable B-ALL cytogenetics, compared with girls (P = .05).

Boys with B-ALL were less likely to be negative for minimal residual disease (76.1% vs. 78.1%, P = .04), but the opposite was true for those with T-ALL (59% vs. 56.8%, P = .01).

As noted before, among pediatric patients with B-ALL, EFS and OS were both inferior for males, with a hazard ratio for higher EFS rates in girls of 1.19 (P = .001) and a HR for OS of 1.17 (P = .046).

Both EFS and OS were similar between the sexes among patients with T-ALL.

The differences in EFS in patients with B-ALL was attributable to higher CNS relapses among boys (4.2% vs. 2.5%, P < .0001). The CNS relapses occurred at a median of 2.5 years in boys versus 2.1 years in girls, although most relapses occurred during therapy.

There were no differences in cumulative isolated bone marrow relapses, however.

Treatment-related mortality rates were the same, but osteonecrosis rates were significantly lower for boys, with a 5-year cumulative incidence of 5.2% versus 6.7% for girls (P = .001).
 

Possible explanations

Dr. Gupta noted that the inferior outcomes among boys may be attributable to extramedullary relapses among patients with B-ALL.

In addition, the lack of sex-based differences in T-ALL may be caused in part by the increased use of CNS radiation in this population. Previous studies in which CNS radiation was omitted showed an increase in CNS relapsed rates among boys but not girls, he pointed out.

“This does imply that in the more recent generation of T-lineage ALL treatment trials that we’ll need to monitor sex-based differences in outcome, as fewer and fewer patients with T-ALL disease received cranial radiation in these more recent trials and in contemporary therapy,” he said.

One possible mechanism for sex-based outcome differences might be differences in steroid metabolism, as suggested by the higher osteonecrosis rate among girls, he added.

In the question-and-answer following the presentation, William G. Woods, MD, from Emory University, Atlanta, asked what role testicular relapse played in outcomes.

Dr. Gupta replied that the investigators had considered that the excess risk for extramedullary relapse in boys might be accounted for by testicular relapse, but “when you take away testicular relapse from those numbers and really just concentrate on CNS, it’s still that substantial difference when you’re talking about B-lineage disease.”

In patients with T-ALL as well, CNS relapse was more common in boys after controlling for testicular relapse, he said.

Another audience member asked whether the data suggest a benefit to treating boys with CNS-penetrating drugs such as dexamethasone or high-dose methotrexate,

Dr. Gupta said that it’s still uncertain whether it is clinically sound to subject a boy with otherwise–standard-risk disease to more intensive high-risk therapy, given the relatively small absolute differences in outcomes between the sexes.

The study was supported by grants from the National Cancer Institute and the St. Baldrick’s Foundation. Dr. Gupta, Dr. Woods, and Dr. Meret had no relevant conflicts of interest to report.

Even in the age of intensive therapy and extensive risk stratification, there are small but significant differences in outcomes between boys and girls with B-lineage acute lymphoblastic leukemia (B-ALL).

This finding comes from a review of 10 years of clinical trials by the Children’s Oncology Group (COG), which showed that, among patients with B-ALL, 5-year event-free survival (EFS) and overall survival (OS) were inferior with boys, compared with girls, even when adjusted for prognostic factors, reported Sumit Gupta, MD, PhD, FRCPC, from the Hospital for Sick Children in Toronto.

“Inferior outcomes, although small in absolute terms, continue to exist among boys versus girls despite modern therapy and after adjusting for other risk factors. These persist also despite the longer duration of therapy among boys,” he said in an oral abstract presentation during the annual meeting of the American Society of Pediatric Hematology/Oncology. (Abstract 2025).

Among pediatric patients with T-cell lineage ALL (T-ALL), however, there were no significant sex-based differences in either EFS or OS, he said.

Although survival for children with ALL has continued to improve, previous studies found inferior survival outcomes in boys, and suggested that the difference might be explained by imbalances in risk factors.

To see whether sex-based disparities persist with modern intensive therapy protocols after adjustment for risk factors, and to determine whether there are sex-based differences in toxicities or patterns of treatment failure, Dr. Gupta and colleagues created a cohort of all patients age 1-30 years enrolled in frontline COG trial for B-ALL and T-ALL from 2004 to 2014.

During this period, boys received an extra year of maintenance. Cranial radiation was limited to B-ALL patients with slow treatment responses and central nervous system status 3, signifying definite CNS involvement. Among patients with T-ALL, cranial radiation was given to all intermediate- and high-risk patients.
 

Sex differences small, but significant

The investigators identified a total of 8,202 patients (4,463 males and 3,739 females) with B-ALL, and 1,562 (1,161 males and 401 females) with T-ALL. Boys were likely to be older (P < .0001), and to have a small but significantly greater likelihood of having unfavorable B-ALL cytogenetics, compared with girls (P = .05).

Boys with B-ALL were less likely to be negative for minimal residual disease (76.1% vs. 78.1%, P = .04), but the opposite was true for those with T-ALL (59% vs. 56.8%, P = .01).

As noted before, among pediatric patients with B-ALL, EFS and OS were both inferior for males, with a hazard ratio for higher EFS rates in girls of 1.19 (P = .001) and a HR for OS of 1.17 (P = .046).

Both EFS and OS were similar between the sexes among patients with T-ALL.

The differences in EFS in patients with B-ALL was attributable to higher CNS relapses among boys (4.2% vs. 2.5%, P < .0001). The CNS relapses occurred at a median of 2.5 years in boys versus 2.1 years in girls, although most relapses occurred during therapy.

There were no differences in cumulative isolated bone marrow relapses, however.

Treatment-related mortality rates were the same, but osteonecrosis rates were significantly lower for boys, with a 5-year cumulative incidence of 5.2% versus 6.7% for girls (P = .001).
 

Possible explanations

Dr. Gupta noted that the inferior outcomes among boys may be attributable to extramedullary relapses among patients with B-ALL.

In addition, the lack of sex-based differences in T-ALL may be caused in part by the increased use of CNS radiation in this population. Previous studies in which CNS radiation was omitted showed an increase in CNS relapsed rates among boys but not girls, he pointed out.

“This does imply that in the more recent generation of T-lineage ALL treatment trials that we’ll need to monitor sex-based differences in outcome, as fewer and fewer patients with T-ALL disease received cranial radiation in these more recent trials and in contemporary therapy,” he said.

One possible mechanism for sex-based outcome differences might be differences in steroid metabolism, as suggested by the higher osteonecrosis rate among girls, he added.

In the question-and-answer following the presentation, William G. Woods, MD, from Emory University, Atlanta, asked what role testicular relapse played in outcomes.

Dr. Gupta replied that the investigators had considered that the excess risk for extramedullary relapse in boys might be accounted for by testicular relapse, but “when you take away testicular relapse from those numbers and really just concentrate on CNS, it’s still that substantial difference when you’re talking about B-lineage disease.”

In patients with T-ALL as well, CNS relapse was more common in boys after controlling for testicular relapse, he said.

Another audience member asked whether the data suggest a benefit to treating boys with CNS-penetrating drugs such as dexamethasone or high-dose methotrexate,

Dr. Gupta said that it’s still uncertain whether it is clinically sound to subject a boy with otherwise–standard-risk disease to more intensive high-risk therapy, given the relatively small absolute differences in outcomes between the sexes.

The study was supported by grants from the National Cancer Institute and the St. Baldrick’s Foundation. Dr. Gupta, Dr. Woods, and Dr. Meret had no relevant conflicts of interest to report.

Even in the age of intensive therapy and extensive risk stratification, there are small but significant differences in outcomes between boys and girls with B-lineage acute lymphoblastic leukemia (B-ALL).

This finding comes from a review of 10 years of clinical trials by the Children’s Oncology Group (COG), which showed that, among patients with B-ALL, 5-year event-free survival (EFS) and overall survival (OS) were inferior with boys, compared with girls, even when adjusted for prognostic factors, reported Sumit Gupta, MD, PhD, FRCPC, from the Hospital for Sick Children in Toronto.

“Inferior outcomes, although small in absolute terms, continue to exist among boys versus girls despite modern therapy and after adjusting for other risk factors. These persist also despite the longer duration of therapy among boys,” he said in an oral abstract presentation during the annual meeting of the American Society of Pediatric Hematology/Oncology. (Abstract 2025).

Among pediatric patients with T-cell lineage ALL (T-ALL), however, there were no significant sex-based differences in either EFS or OS, he said.

Although survival for children with ALL has continued to improve, previous studies found inferior survival outcomes in boys, and suggested that the difference might be explained by imbalances in risk factors.

To see whether sex-based disparities persist with modern intensive therapy protocols after adjustment for risk factors, and to determine whether there are sex-based differences in toxicities or patterns of treatment failure, Dr. Gupta and colleagues created a cohort of all patients age 1-30 years enrolled in frontline COG trial for B-ALL and T-ALL from 2004 to 2014.

During this period, boys received an extra year of maintenance. Cranial radiation was limited to B-ALL patients with slow treatment responses and central nervous system status 3, signifying definite CNS involvement. Among patients with T-ALL, cranial radiation was given to all intermediate- and high-risk patients.
 

Sex differences small, but significant

The investigators identified a total of 8,202 patients (4,463 males and 3,739 females) with B-ALL, and 1,562 (1,161 males and 401 females) with T-ALL. Boys were likely to be older (P < .0001), and to have a small but significantly greater likelihood of having unfavorable B-ALL cytogenetics, compared with girls (P = .05).

Boys with B-ALL were less likely to be negative for minimal residual disease (76.1% vs. 78.1%, P = .04), but the opposite was true for those with T-ALL (59% vs. 56.8%, P = .01).

As noted before, among pediatric patients with B-ALL, EFS and OS were both inferior for males, with a hazard ratio for higher EFS rates in girls of 1.19 (P = .001) and a HR for OS of 1.17 (P = .046).

Both EFS and OS were similar between the sexes among patients with T-ALL.

The differences in EFS in patients with B-ALL was attributable to higher CNS relapses among boys (4.2% vs. 2.5%, P < .0001). The CNS relapses occurred at a median of 2.5 years in boys versus 2.1 years in girls, although most relapses occurred during therapy.

There were no differences in cumulative isolated bone marrow relapses, however.

Treatment-related mortality rates were the same, but osteonecrosis rates were significantly lower for boys, with a 5-year cumulative incidence of 5.2% versus 6.7% for girls (P = .001).
 

Possible explanations

Dr. Gupta noted that the inferior outcomes among boys may be attributable to extramedullary relapses among patients with B-ALL.

In addition, the lack of sex-based differences in T-ALL may be caused in part by the increased use of CNS radiation in this population. Previous studies in which CNS radiation was omitted showed an increase in CNS relapsed rates among boys but not girls, he pointed out.

“This does imply that in the more recent generation of T-lineage ALL treatment trials that we’ll need to monitor sex-based differences in outcome, as fewer and fewer patients with T-ALL disease received cranial radiation in these more recent trials and in contemporary therapy,” he said.

One possible mechanism for sex-based outcome differences might be differences in steroid metabolism, as suggested by the higher osteonecrosis rate among girls, he added.

In the question-and-answer following the presentation, William G. Woods, MD, from Emory University, Atlanta, asked what role testicular relapse played in outcomes.

Dr. Gupta replied that the investigators had considered that the excess risk for extramedullary relapse in boys might be accounted for by testicular relapse, but “when you take away testicular relapse from those numbers and really just concentrate on CNS, it’s still that substantial difference when you’re talking about B-lineage disease.”

In patients with T-ALL as well, CNS relapse was more common in boys after controlling for testicular relapse, he said.

Another audience member asked whether the data suggest a benefit to treating boys with CNS-penetrating drugs such as dexamethasone or high-dose methotrexate,

Dr. Gupta said that it’s still uncertain whether it is clinically sound to subject a boy with otherwise–standard-risk disease to more intensive high-risk therapy, given the relatively small absolute differences in outcomes between the sexes.

The study was supported by grants from the National Cancer Institute and the St. Baldrick’s Foundation. Dr. Gupta, Dr. Woods, and Dr. Meret had no relevant conflicts of interest to report.

Survivors of childhood cancers are at increased risk for prescription opioid misuse compared with their peers, a review of a claims database revealed.

Among more than 8,000 patients age 21 or younger who had completed treatment for hematologic, central nervous system, bone, or gonadal cancers, survivors were significantly more likely than were their peers to have an opioid prescription, longer duration of prescription, and higher daily doses of opioids, and to have opioid prescriptions overlapping for a week or more, reported Xu Ji, PhD, of Emory University in Atlanta.

Teenage and young adult patients were at higher risk than were patients younger than 12, and the risk was highest among patients who had been treated for bone malignancies, as well as those who had undergone any hematopoietic stem cell transplant.

“These findings suggest that health care providers who regularly see survivors should explore nonopioid options to help prevent opioid misuse, and screen for potential misuse in those who actually receive opioids,” she said in an oral abstract presented during the annual meeting of the American Society of Pediatric Hematology/Oncology.

“This is a really important topic, and something that’s probably been underinvestigated and underexplored in our patient population,” said session comoderator Sheri Spunt, MD, Endowed Professor of Pediatric Cancer at Stanford (Calif.) University.
 

Database review

Dr. Ji and colleagues used the IBM MarketScan Commercial Claims and Encounters database from 2009 to 2018 to examine prescription opioid use, potential misuse, and substance use disorders in pediatric cancer survivors in the first year after completion of therapy, and to identify factors associated with risk for misuse or substance use disorders. Specifically, the period of interest was the first year after completion of all treatments, including surgery, chemotherapy, radiation, and stem cell transplant (Abstract 2015).

They looked at deidentified records on any opioid prescription and for treatment of any opioid use or substance use disorder (alcohol, psychotherapeutic drugs, marijuana, or illicit drug use disorders).

They defined indicators of potential misuse as either prescriptions for long-acting or extended-release opioids for acute pain conditions; opioid and benzodiazepine prescriptions overlapping by a week or more; opioid prescriptions overlapping by a week or more; high daily opioid dosage (prescribed daily dose of 100 or greater morphine milligram equivalent [MME]; and/or opioid dose escalation (an increase of at least 50% in mean MMEs per month twice consecutively within 1 year).

They compared outcomes between a total of 8,635 survivors and 44,175 controls, matched on a 1:5 basis with survivors by age, sex, and region, and continuous enrollment during the 1-year posttherapy period.

In each of three age categories – 0 to 11 years, 12 to 17 years, and 18 years and older – survivors were significantly more likely to have received an opioid prescription, at 15% for the youngest survivors vs. 2% of controls, 25% vs. 8% for 12- to 17-year-olds, and 28% vs. 12% for those 18 and older (P < .01 for all three comparisons).

Survivors were also significantly more likely to have any indicator of potential misuse (1.6% vs. 0.1%, 4.6% vs. 0.5%, and 7.4% vs. 1.2%, respectively, P < .001 for all) and both the youngest and oldest groups (but not 12- to 17-year-olds) were significantly more like to have opioid or substance use disorder (0.4% vs. 0% for 0-11 years, 5.76% vs. 4.2% for 18 years and older, P < .001 for both).

Among patients with any opioid prescription, survivors were significantly more likely than were controls of any age to have indicators for potential misuse. For example, 13% of survivors aged 18 years and older had prescriptions for high opioid doses, compared with 5% of controls, and 12% had prescription overlap, vs. 2%.

Compared with patients with leukemia, patients treated for bone malignancies had a 6% greater risk for having any indicator of misuse, while patients with other malignancies were at slightly lower risk for misuse than those who completed leukemia therapy.

Patients who received any stem cell transplant had an 8.4% greater risk for misuse compared with patients who had surgery only.
 

Opioids pre- and posttreatment?

“Being someone who takes care of a lot of bone cancer patients, I do see patients with these issues,” Dr. Spunt said.

Audience member Jack H. Staddon, MD, PhD, of the Billings (Montana) Clinic, noted the possibility that opioid use during treatment may have been carried on into the posttreatment period, and asked whether use of narcotics during treatment was an independent risk factor for posttreatment narcotic use or misuse.

The researchers plan to investigate this question in future studies, Dr. Ji replied.

They did not report a study funding source. Dr. Ji and coauthors and Dr. Staddon reported no relevant disclosures.

Survivors of childhood cancers are at increased risk for prescription opioid misuse compared with their peers, a review of a claims database revealed.

Among more than 8,000 patients age 21 or younger who had completed treatment for hematologic, central nervous system, bone, or gonadal cancers, survivors were significantly more likely than were their peers to have an opioid prescription, longer duration of prescription, and higher daily doses of opioids, and to have opioid prescriptions overlapping for a week or more, reported Xu Ji, PhD, of Emory University in Atlanta.

Teenage and young adult patients were at higher risk than were patients younger than 12, and the risk was highest among patients who had been treated for bone malignancies, as well as those who had undergone any hematopoietic stem cell transplant.

“These findings suggest that health care providers who regularly see survivors should explore nonopioid options to help prevent opioid misuse, and screen for potential misuse in those who actually receive opioids,” she said in an oral abstract presented during the annual meeting of the American Society of Pediatric Hematology/Oncology.

“This is a really important topic, and something that’s probably been underinvestigated and underexplored in our patient population,” said session comoderator Sheri Spunt, MD, Endowed Professor of Pediatric Cancer at Stanford (Calif.) University.
 

Database review

Dr. Ji and colleagues used the IBM MarketScan Commercial Claims and Encounters database from 2009 to 2018 to examine prescription opioid use, potential misuse, and substance use disorders in pediatric cancer survivors in the first year after completion of therapy, and to identify factors associated with risk for misuse or substance use disorders. Specifically, the period of interest was the first year after completion of all treatments, including surgery, chemotherapy, radiation, and stem cell transplant (Abstract 2015).

They looked at deidentified records on any opioid prescription and for treatment of any opioid use or substance use disorder (alcohol, psychotherapeutic drugs, marijuana, or illicit drug use disorders).

They defined indicators of potential misuse as either prescriptions for long-acting or extended-release opioids for acute pain conditions; opioid and benzodiazepine prescriptions overlapping by a week or more; opioid prescriptions overlapping by a week or more; high daily opioid dosage (prescribed daily dose of 100 or greater morphine milligram equivalent [MME]; and/or opioid dose escalation (an increase of at least 50% in mean MMEs per month twice consecutively within 1 year).

They compared outcomes between a total of 8,635 survivors and 44,175 controls, matched on a 1:5 basis with survivors by age, sex, and region, and continuous enrollment during the 1-year posttherapy period.

In each of three age categories – 0 to 11 years, 12 to 17 years, and 18 years and older – survivors were significantly more likely to have received an opioid prescription, at 15% for the youngest survivors vs. 2% of controls, 25% vs. 8% for 12- to 17-year-olds, and 28% vs. 12% for those 18 and older (P < .01 for all three comparisons).

Survivors were also significantly more likely to have any indicator of potential misuse (1.6% vs. 0.1%, 4.6% vs. 0.5%, and 7.4% vs. 1.2%, respectively, P < .001 for all) and both the youngest and oldest groups (but not 12- to 17-year-olds) were significantly more like to have opioid or substance use disorder (0.4% vs. 0% for 0-11 years, 5.76% vs. 4.2% for 18 years and older, P < .001 for both).

Among patients with any opioid prescription, survivors were significantly more likely than were controls of any age to have indicators for potential misuse. For example, 13% of survivors aged 18 years and older had prescriptions for high opioid doses, compared with 5% of controls, and 12% had prescription overlap, vs. 2%.

Compared with patients with leukemia, patients treated for bone malignancies had a 6% greater risk for having any indicator of misuse, while patients with other malignancies were at slightly lower risk for misuse than those who completed leukemia therapy.

Patients who received any stem cell transplant had an 8.4% greater risk for misuse compared with patients who had surgery only.
 

Opioids pre- and posttreatment?

“Being someone who takes care of a lot of bone cancer patients, I do see patients with these issues,” Dr. Spunt said.

Audience member Jack H. Staddon, MD, PhD, of the Billings (Montana) Clinic, noted the possibility that opioid use during treatment may have been carried on into the posttreatment period, and asked whether use of narcotics during treatment was an independent risk factor for posttreatment narcotic use or misuse.

The researchers plan to investigate this question in future studies, Dr. Ji replied.

They did not report a study funding source. Dr. Ji and coauthors and Dr. Staddon reported no relevant disclosures.

Survivors of childhood cancers are at increased risk for prescription opioid misuse compared with their peers, a review of a claims database revealed.

Among more than 8,000 patients age 21 or younger who had completed treatment for hematologic, central nervous system, bone, or gonadal cancers, survivors were significantly more likely than were their peers to have an opioid prescription, longer duration of prescription, and higher daily doses of opioids, and to have opioid prescriptions overlapping for a week or more, reported Xu Ji, PhD, of Emory University in Atlanta.

Teenage and young adult patients were at higher risk than were patients younger than 12, and the risk was highest among patients who had been treated for bone malignancies, as well as those who had undergone any hematopoietic stem cell transplant.

“These findings suggest that health care providers who regularly see survivors should explore nonopioid options to help prevent opioid misuse, and screen for potential misuse in those who actually receive opioids,” she said in an oral abstract presented during the annual meeting of the American Society of Pediatric Hematology/Oncology.

“This is a really important topic, and something that’s probably been underinvestigated and underexplored in our patient population,” said session comoderator Sheri Spunt, MD, Endowed Professor of Pediatric Cancer at Stanford (Calif.) University.
 

Database review

Dr. Ji and colleagues used the IBM MarketScan Commercial Claims and Encounters database from 2009 to 2018 to examine prescription opioid use, potential misuse, and substance use disorders in pediatric cancer survivors in the first year after completion of therapy, and to identify factors associated with risk for misuse or substance use disorders. Specifically, the period of interest was the first year after completion of all treatments, including surgery, chemotherapy, radiation, and stem cell transplant (Abstract 2015).

They looked at deidentified records on any opioid prescription and for treatment of any opioid use or substance use disorder (alcohol, psychotherapeutic drugs, marijuana, or illicit drug use disorders).

They defined indicators of potential misuse as either prescriptions for long-acting or extended-release opioids for acute pain conditions; opioid and benzodiazepine prescriptions overlapping by a week or more; opioid prescriptions overlapping by a week or more; high daily opioid dosage (prescribed daily dose of 100 or greater morphine milligram equivalent [MME]; and/or opioid dose escalation (an increase of at least 50% in mean MMEs per month twice consecutively within 1 year).

They compared outcomes between a total of 8,635 survivors and 44,175 controls, matched on a 1:5 basis with survivors by age, sex, and region, and continuous enrollment during the 1-year posttherapy period.

In each of three age categories – 0 to 11 years, 12 to 17 years, and 18 years and older – survivors were significantly more likely to have received an opioid prescription, at 15% for the youngest survivors vs. 2% of controls, 25% vs. 8% for 12- to 17-year-olds, and 28% vs. 12% for those 18 and older (P < .01 for all three comparisons).

Survivors were also significantly more likely to have any indicator of potential misuse (1.6% vs. 0.1%, 4.6% vs. 0.5%, and 7.4% vs. 1.2%, respectively, P < .001 for all) and both the youngest and oldest groups (but not 12- to 17-year-olds) were significantly more like to have opioid or substance use disorder (0.4% vs. 0% for 0-11 years, 5.76% vs. 4.2% for 18 years and older, P < .001 for both).

Among patients with any opioid prescription, survivors were significantly more likely than were controls of any age to have indicators for potential misuse. For example, 13% of survivors aged 18 years and older had prescriptions for high opioid doses, compared with 5% of controls, and 12% had prescription overlap, vs. 2%.

Compared with patients with leukemia, patients treated for bone malignancies had a 6% greater risk for having any indicator of misuse, while patients with other malignancies were at slightly lower risk for misuse than those who completed leukemia therapy.

Patients who received any stem cell transplant had an 8.4% greater risk for misuse compared with patients who had surgery only.
 

Opioids pre- and posttreatment?

“Being someone who takes care of a lot of bone cancer patients, I do see patients with these issues,” Dr. Spunt said.

Audience member Jack H. Staddon, MD, PhD, of the Billings (Montana) Clinic, noted the possibility that opioid use during treatment may have been carried on into the posttreatment period, and asked whether use of narcotics during treatment was an independent risk factor for posttreatment narcotic use or misuse.

The researchers plan to investigate this question in future studies, Dr. Ji replied.

They did not report a study funding source. Dr. Ji and coauthors and Dr. Staddon reported no relevant disclosures.

It’s early days, but preliminary data show that a chimeric antigen receptor T-cell therapy (CAR T) product was associated with high rates of minimal residual disease (MRD) negativity, and complete or near-complete responses in children and adolescents with relapsed or refractory B-lineage acute lymphoblastic leukemia (B-ALL).

Among 24 patients aged 3-20 years with relapsed or refractory B-ALL treated with the CAR T construct brexucabtagene autoleucel (KTE-X19; Tecartus), 16 had either a complete response or CR with incomplete recovery of blood counts (CRi), for a combined CR/CRi rate of 67%, reported Alan S. Wayne, MD, from Children’s Hospital Los Angeles and the University of Southern California Norris Comprehensive Cancer Center, also in Los Angeles.

“Optimized KTE-X19 formulation of 40 mL and revised toxicity management were associated with an improved risk/benefit profile,” he said in audio narration accompanying a poster presented during the annual meeting of the American Society of Pediatric Hematology/Oncology.

Although overall survival for children and adolescents receiving first-line therapy for B-ALL is associated with remission rates of 80% or more, the prognosis is poor following relapse, despite the availability of newer therapies such as blinatumomab (Blincyto) and inotuzumab (Besponsa), with a 1-year overall survival rate of approximately 36%, he said.

To see whether they could improve on these odds, Dr. Wayne and colleagues conducted the phase 1 Zuma-4 trial, a single-arm, open-label study in children and adolescents with relapsed/refractory B-ALL.

He reported long-term follow-up results from the study.
 

Zuma-4 details

A total of 24 patients, median age 14 (range 3 to 20) years, received the CAR T product. Four patients received the starting dose of 2 x 10⁶ CAR T per kg (these patients were enrolled per protocol for evaluation of dose-limiting toxicities).

Following the initial dosing and evaluation of safety, 11 patients were treated with a dose of 1 x 10⁶ cells per kg with a total volume of 68 mL, and 9 received 1 x 10⁶ per kg at a volume of 40 mL (the dose being used in current phase 2 trials).

The median follow-up at the time of data cutoff in September 2020 was 36.1 months.

The combined CR/CRi rate was 75% for patients treated at the starting dose, 64% for patients treated at the 1 x 10⁶ 68-mL dose, and 67% for those who received the 48-mL dose.

The respective median durations of response were 4.14 months, 10.68 months, and not reached.

All patients who had an objective response had undetectable MRD assessed by flow cytometry with a sensitivity of .01%.

The therapy served as a bridge to allogeneic transplant in 16 patients, including 2 in the initial dose group, 8 in the 68-mL group, and 6 in the 40-mL group.

Median overall survival was not reached in either of the two 1 x 10⁶–dose groups, but was 8 months in the 2 x 10⁶ group.

There were no dose-limiting toxicities seen, and the adverse event profile was consistent with that seen with the use of CAR T therapy for other malignancies.

Patients treated at either the 68-mL or 40-mL 1 x 106–dose levels received tocilizumab only for neurologic events occurring in context with the cytokine release syndrome (CRS), and were started on steroids for grade 2 or greater neurologic events.

Rates of grade 3 or greater neurologic events were 25% in the initial-dose group, 27% in the 68-mL group, and 11% in the 40-mL group. Respective rates of grade 3 or greater CRS were 75%, 27%, and 22%.

Four patients died on study, all from causes deemed unrelated to CAR T therapy: two from progressive disease, one from disseminated mucormycosis, and one from Escherichia sepsis.

Investigators are currently enrolling pediatric patients with relapsed/refractory B-ALL or non-Hodgkin lymphoma, including patients with MRD-positive disease and early relapse after first-line therapy, in phase 2 of the Zuma-4 study.
 

How long will it last?

Howard Weinstein, MD, chief of pediatric hematology/oncology at Mass General for Children in Boston, who was not involved in the study, said in an interview that the response rate and comparatively low toxicity profile look good.

“One of the challenges, though, with CAR T-cell products has been relapse – almost half of the patients who go into remission relapse. Sometimes leukemic cells change their surface properties, resulting in antigen loss, there’s T-cell exhaustion, and other postulates for relapse,” he said.

He noted that due to the high number of patients who went on to transplant, the study lacks good data on the durability of remissions.

“One of the unknowns at the moment is whether CAR T cells are sufficient to cure a high percentage of children who have had a relapse, or do you need to follow it with a bone marrow transplant,” Dr. Weinstein said.

The ZUMA-4 trial is sponsored by Kite Pharma. Dr. Wayne disclosed research funding from Kite, Servier, and Institut de Recherches Internationales. Dr. Weinstein had no relevant disclosures.

It’s early days, but preliminary data show that a chimeric antigen receptor T-cell therapy (CAR T) product was associated with high rates of minimal residual disease (MRD) negativity, and complete or near-complete responses in children and adolescents with relapsed or refractory B-lineage acute lymphoblastic leukemia (B-ALL).

Among 24 patients aged 3-20 years with relapsed or refractory B-ALL treated with the CAR T construct brexucabtagene autoleucel (KTE-X19; Tecartus), 16 had either a complete response or CR with incomplete recovery of blood counts (CRi), for a combined CR/CRi rate of 67%, reported Alan S. Wayne, MD, from Children’s Hospital Los Angeles and the University of Southern California Norris Comprehensive Cancer Center, also in Los Angeles.

“Optimized KTE-X19 formulation of 40 mL and revised toxicity management were associated with an improved risk/benefit profile,” he said in audio narration accompanying a poster presented during the annual meeting of the American Society of Pediatric Hematology/Oncology.

Although overall survival for children and adolescents receiving first-line therapy for B-ALL is associated with remission rates of 80% or more, the prognosis is poor following relapse, despite the availability of newer therapies such as blinatumomab (Blincyto) and inotuzumab (Besponsa), with a 1-year overall survival rate of approximately 36%, he said.

To see whether they could improve on these odds, Dr. Wayne and colleagues conducted the phase 1 Zuma-4 trial, a single-arm, open-label study in children and adolescents with relapsed/refractory B-ALL.

He reported long-term follow-up results from the study.
 

Zuma-4 details

A total of 24 patients, median age 14 (range 3 to 20) years, received the CAR T product. Four patients received the starting dose of 2 x 10⁶ CAR T per kg (these patients were enrolled per protocol for evaluation of dose-limiting toxicities).

Following the initial dosing and evaluation of safety, 11 patients were treated with a dose of 1 x 10⁶ cells per kg with a total volume of 68 mL, and 9 received 1 x 10⁶ per kg at a volume of 40 mL (the dose being used in current phase 2 trials).

The median follow-up at the time of data cutoff in September 2020 was 36.1 months.

The combined CR/CRi rate was 75% for patients treated at the starting dose, 64% for patients treated at the 1 x 10⁶ 68-mL dose, and 67% for those who received the 48-mL dose.

The respective median durations of response were 4.14 months, 10.68 months, and not reached.

All patients who had an objective response had undetectable MRD assessed by flow cytometry with a sensitivity of .01%.

The therapy served as a bridge to allogeneic transplant in 16 patients, including 2 in the initial dose group, 8 in the 68-mL group, and 6 in the 40-mL group.

Median overall survival was not reached in either of the two 1 x 10⁶–dose groups, but was 8 months in the 2 x 10⁶ group.

There were no dose-limiting toxicities seen, and the adverse event profile was consistent with that seen with the use of CAR T therapy for other malignancies.

Patients treated at either the 68-mL or 40-mL 1 x 106–dose levels received tocilizumab only for neurologic events occurring in context with the cytokine release syndrome (CRS), and were started on steroids for grade 2 or greater neurologic events.

Rates of grade 3 or greater neurologic events were 25% in the initial-dose group, 27% in the 68-mL group, and 11% in the 40-mL group. Respective rates of grade 3 or greater CRS were 75%, 27%, and 22%.

Four patients died on study, all from causes deemed unrelated to CAR T therapy: two from progressive disease, one from disseminated mucormycosis, and one from Escherichia sepsis.

Investigators are currently enrolling pediatric patients with relapsed/refractory B-ALL or non-Hodgkin lymphoma, including patients with MRD-positive disease and early relapse after first-line therapy, in phase 2 of the Zuma-4 study.
 

How long will it last?

Howard Weinstein, MD, chief of pediatric hematology/oncology at Mass General for Children in Boston, who was not involved in the study, said in an interview that the response rate and comparatively low toxicity profile look good.

“One of the challenges, though, with CAR T-cell products has been relapse – almost half of the patients who go into remission relapse. Sometimes leukemic cells change their surface properties, resulting in antigen loss, there’s T-cell exhaustion, and other postulates for relapse,” he said.

He noted that due to the high number of patients who went on to transplant, the study lacks good data on the durability of remissions.

“One of the unknowns at the moment is whether CAR T cells are sufficient to cure a high percentage of children who have had a relapse, or do you need to follow it with a bone marrow transplant,” Dr. Weinstein said.

The ZUMA-4 trial is sponsored by Kite Pharma. Dr. Wayne disclosed research funding from Kite, Servier, and Institut de Recherches Internationales. Dr. Weinstein had no relevant disclosures.

It’s early days, but preliminary data show that a chimeric antigen receptor T-cell therapy (CAR T) product was associated with high rates of minimal residual disease (MRD) negativity, and complete or near-complete responses in children and adolescents with relapsed or refractory B-lineage acute lymphoblastic leukemia (B-ALL).

Among 24 patients aged 3-20 years with relapsed or refractory B-ALL treated with the CAR T construct brexucabtagene autoleucel (KTE-X19; Tecartus), 16 had either a complete response or CR with incomplete recovery of blood counts (CRi), for a combined CR/CRi rate of 67%, reported Alan S. Wayne, MD, from Children’s Hospital Los Angeles and the University of Southern California Norris Comprehensive Cancer Center, also in Los Angeles.

“Optimized KTE-X19 formulation of 40 mL and revised toxicity management were associated with an improved risk/benefit profile,” he said in audio narration accompanying a poster presented during the annual meeting of the American Society of Pediatric Hematology/Oncology.

Although overall survival for children and adolescents receiving first-line therapy for B-ALL is associated with remission rates of 80% or more, the prognosis is poor following relapse, despite the availability of newer therapies such as blinatumomab (Blincyto) and inotuzumab (Besponsa), with a 1-year overall survival rate of approximately 36%, he said.

To see whether they could improve on these odds, Dr. Wayne and colleagues conducted the phase 1 Zuma-4 trial, a single-arm, open-label study in children and adolescents with relapsed/refractory B-ALL.

He reported long-term follow-up results from the study.
 

Zuma-4 details

A total of 24 patients, median age 14 (range 3 to 20) years, received the CAR T product. Four patients received the starting dose of 2 x 10⁶ CAR T per kg (these patients were enrolled per protocol for evaluation of dose-limiting toxicities).

Following the initial dosing and evaluation of safety, 11 patients were treated with a dose of 1 x 10⁶ cells per kg with a total volume of 68 mL, and 9 received 1 x 10⁶ per kg at a volume of 40 mL (the dose being used in current phase 2 trials).

The median follow-up at the time of data cutoff in September 2020 was 36.1 months.

The combined CR/CRi rate was 75% for patients treated at the starting dose, 64% for patients treated at the 1 x 10⁶ 68-mL dose, and 67% for those who received the 48-mL dose.

The respective median durations of response were 4.14 months, 10.68 months, and not reached.

All patients who had an objective response had undetectable MRD assessed by flow cytometry with a sensitivity of .01%.

The therapy served as a bridge to allogeneic transplant in 16 patients, including 2 in the initial dose group, 8 in the 68-mL group, and 6 in the 40-mL group.

Median overall survival was not reached in either of the two 1 x 10⁶–dose groups, but was 8 months in the 2 x 10⁶ group.

There were no dose-limiting toxicities seen, and the adverse event profile was consistent with that seen with the use of CAR T therapy for other malignancies.

Patients treated at either the 68-mL or 40-mL 1 x 106–dose levels received tocilizumab only for neurologic events occurring in context with the cytokine release syndrome (CRS), and were started on steroids for grade 2 or greater neurologic events.

Rates of grade 3 or greater neurologic events were 25% in the initial-dose group, 27% in the 68-mL group, and 11% in the 40-mL group. Respective rates of grade 3 or greater CRS were 75%, 27%, and 22%.

Four patients died on study, all from causes deemed unrelated to CAR T therapy: two from progressive disease, one from disseminated mucormycosis, and one from Escherichia sepsis.

Investigators are currently enrolling pediatric patients with relapsed/refractory B-ALL or non-Hodgkin lymphoma, including patients with MRD-positive disease and early relapse after first-line therapy, in phase 2 of the Zuma-4 study.
 

How long will it last?

Howard Weinstein, MD, chief of pediatric hematology/oncology at Mass General for Children in Boston, who was not involved in the study, said in an interview that the response rate and comparatively low toxicity profile look good.

“One of the challenges, though, with CAR T-cell products has been relapse – almost half of the patients who go into remission relapse. Sometimes leukemic cells change their surface properties, resulting in antigen loss, there’s T-cell exhaustion, and other postulates for relapse,” he said.

He noted that due to the high number of patients who went on to transplant, the study lacks good data on the durability of remissions.

“One of the unknowns at the moment is whether CAR T cells are sufficient to cure a high percentage of children who have had a relapse, or do you need to follow it with a bone marrow transplant,” Dr. Weinstein said.

The ZUMA-4 trial is sponsored by Kite Pharma. Dr. Wayne disclosed research funding from Kite, Servier, and Institut de Recherches Internationales. Dr. Weinstein had no relevant disclosures.

Sharing their personal experiences on social media can emphasize oncologists’ humanity and have substantive, beneficial effects on patient care, according to a presentation at the Collaboration for Outcomes using Social Media in Oncology (COSMO) inaugural meeting.

Mark A. Lewis, MD, explained to the COSMO meeting audience how storytelling on social media can educate and engage patients, advocates, and professional colleagues – advancing knowledge, dispelling misinformation, and promoting clinical research.

Dr. Lewis, an oncologist at Intermountain Healthcare in Salt Lake City, reflected on the bifid roles of oncologists as scientists engaged in life-long learning and humanists who can internalize and appreciate the unique character and circumstances of their patients.

Patients who have serious illnesses are necessarily aggregated by statistics. However, in an essay published in 2011, Dr. Lewis noted that “each individual patient partakes in a unique, irreproducible experiment where n = 1” (J Clin Oncol. 2011 Aug 1;29[22]:3103-4).

Dr. Lewis highlighted the duality of individual data points on a survival curve as descriptors of common disease trajectories and treatment effects. However, those data points also conceal important narratives regarding the most highly valued aspects of the doctor-patient relationship and the impact of cancer treatment on patients’ lives.

In referring to the futuristic essay “Ars Brevis,” Dr. Lewis contrasted the humanism of oncology specialists in the present day with the fictional image of data-regurgitating robots programmed to maximize the efficiency of each patient encounter (J Clin Oncol. 2013 May 10;31[14]:1792-4).

Dr. Lewis reminded attendees that to practice medicine without using both “head and heart” undermines the inherent nature of medical care.

Unfortunately, that perspective may not match the public perception of oncologists. Dr. Lewis described his experience of typing “oncologists are” into an Internet search engine and seeing the auto-complete function prompt words such as “criminals,” “evil,” “murderers,” and “confused.”

Obviously, it is hard to establish a trusting patient-doctor relationship if that is the prima facie perception of the oncology specialty.
 

Dispelling myths and creating community via social media

A primary goal of consultation with a newly-diagnosed cancer patient is for the patient to feel that the oncologist will be there to take care of them, regardless of what the future holds.

Dr. Lewis has found that social media can potentially extend that feeling to a global community of patients, caregivers, and others seeking information relevant to a cancer diagnosis. He believes that oncologists have an opportunity to dispel myths and fears by being attentive to the real-life concerns of patients.

Dr. Lewis took advantage of this opportunity when he underwent a Whipple procedure (pancreaticoduodenectomy) for a pancreatic neuroendocrine tumor. He and the hospital’s media services staff “live-tweeted” his surgery and recovery.

With those tweets, Dr. Lewis demystified each step of a major surgical procedure. From messages he received on social media, Dr. Lewis knows he made the decision to have a Whipple procedure more acceptable to other patients.

His personal medical experience notwithstanding, Dr. Lewis acknowledged that every patient’s circumstances are unique.

Oncologists cannot possibly empathize with every circumstance. However, when they show sensitivity to personal elements of the cancer experience, they shed light on the complicated role they play in patient care and can facilitate good decision-making among patients across the globe.
 

Social media for professional development and patient care

The publication of his 2011 essay was gratifying for Dr. Lewis, but the finite number of comments he received thereafter illustrated the rather limited audience that traditional academic publications have and the laborious process for subsequent interaction (J Clin Oncol. 2011 Aug 1;29[22]:3103-4).

First as an observer and later as a participant on social media, Dr. Lewis appreciated that teaching points and publications can be amplified by global distribution and the potential for informal bidirectional communication.

Social media platforms enable physicians to connect with a larger audience through participative communication, in which users develop, share, and react to content (N Engl J Med. 2009 Aug 13;361[7]:649-51).

Dr. Lewis reflected on how oncologists are challenged to sort through the thousands of oncology-focused publications annually. Through social media, one can see the studies on which the experts are commenting and appreciate the nuances that contextualize the results. Focused interactions with renowned doctors, at regular intervals, require little formality.

Online journal clubs enable the sharing of ideas, opinions, multimedia resources, and references across institutional and international borders (J Gen Intern Med. 2014 Oct;29[10]:1317-8).
 

Social media in oncology: Accomplishments and promise

The development of broadband Internet, wireless connectivity, and social media for peer-to-peer and general communication are among the major technological advances that have transformed medical communication.

As an organization, COSMO aims to describe, understand, and improve the use of social media to increase the penetration of evidence-based guidelines and research insights into clinical practice (Future Oncol. 2017 Jun;13[15]:1281-5).

At the inaugural COSMO meeting, areas of progress since COSMO’s inception in 2015 were highlighted, including:

• The involvement of cancer professionals and advocates in multiple distinctive platforms.
• The development of hashtag libraries to aggregate interest groups and topics.
• The refinement of strategies for engaging advocates with attention to inclusiveness.
• A steady trajectory of growth in tweeting at scientific conferences.

An overarching theme of the COSMO meeting was “authenticity,” a virtue that is easy to admire but requires conscious, consistent effort to achieve.

Disclosure of conflicts of interest and avoiding using social media simply as a recruitment tool for clinical trials are basic components of accurate self-representation.

In addition, Dr. Lewis advocated for sharing personal experiences in a component of social media posts so oncologists can show humanity as a feature of their professional online identity and inherent nature.

Dr. Lewis disclosed consultancy with Medscape/WebMD, which are owned by the same parent company as MDedge. He also disclosed relationships with Foundation Medicine, Natera, Exelixis, QED, HalioDX, and Ipsen.


Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Sharing their personal experiences on social media can emphasize oncologists’ humanity and have substantive, beneficial effects on patient care, according to a presentation at the Collaboration for Outcomes using Social Media in Oncology (COSMO) inaugural meeting.

Mark A. Lewis, MD, explained to the COSMO meeting audience how storytelling on social media can educate and engage patients, advocates, and professional colleagues – advancing knowledge, dispelling misinformation, and promoting clinical research.

Dr. Lewis, an oncologist at Intermountain Healthcare in Salt Lake City, reflected on the bifid roles of oncologists as scientists engaged in life-long learning and humanists who can internalize and appreciate the unique character and circumstances of their patients.

Patients who have serious illnesses are necessarily aggregated by statistics. However, in an essay published in 2011, Dr. Lewis noted that “each individual patient partakes in a unique, irreproducible experiment where n = 1” (J Clin Oncol. 2011 Aug 1;29[22]:3103-4).

Dr. Lewis highlighted the duality of individual data points on a survival curve as descriptors of common disease trajectories and treatment effects. However, those data points also conceal important narratives regarding the most highly valued aspects of the doctor-patient relationship and the impact of cancer treatment on patients’ lives.

In referring to the futuristic essay “Ars Brevis,” Dr. Lewis contrasted the humanism of oncology specialists in the present day with the fictional image of data-regurgitating robots programmed to maximize the efficiency of each patient encounter (J Clin Oncol. 2013 May 10;31[14]:1792-4).

Dr. Lewis reminded attendees that to practice medicine without using both “head and heart” undermines the inherent nature of medical care.

Unfortunately, that perspective may not match the public perception of oncologists. Dr. Lewis described his experience of typing “oncologists are” into an Internet search engine and seeing the auto-complete function prompt words such as “criminals,” “evil,” “murderers,” and “confused.”

Obviously, it is hard to establish a trusting patient-doctor relationship if that is the prima facie perception of the oncology specialty.
 

Dispelling myths and creating community via social media

A primary goal of consultation with a newly-diagnosed cancer patient is for the patient to feel that the oncologist will be there to take care of them, regardless of what the future holds.

Dr. Lewis has found that social media can potentially extend that feeling to a global community of patients, caregivers, and others seeking information relevant to a cancer diagnosis. He believes that oncologists have an opportunity to dispel myths and fears by being attentive to the real-life concerns of patients.

Dr. Lewis took advantage of this opportunity when he underwent a Whipple procedure (pancreaticoduodenectomy) for a pancreatic neuroendocrine tumor. He and the hospital’s media services staff “live-tweeted” his surgery and recovery.

With those tweets, Dr. Lewis demystified each step of a major surgical procedure. From messages he received on social media, Dr. Lewis knows he made the decision to have a Whipple procedure more acceptable to other patients.

His personal medical experience notwithstanding, Dr. Lewis acknowledged that every patient’s circumstances are unique.

Oncologists cannot possibly empathize with every circumstance. However, when they show sensitivity to personal elements of the cancer experience, they shed light on the complicated role they play in patient care and can facilitate good decision-making among patients across the globe.
 

Social media for professional development and patient care

The publication of his 2011 essay was gratifying for Dr. Lewis, but the finite number of comments he received thereafter illustrated the rather limited audience that traditional academic publications have and the laborious process for subsequent interaction (J Clin Oncol. 2011 Aug 1;29[22]:3103-4).

First as an observer and later as a participant on social media, Dr. Lewis appreciated that teaching points and publications can be amplified by global distribution and the potential for informal bidirectional communication.

Social media platforms enable physicians to connect with a larger audience through participative communication, in which users develop, share, and react to content (N Engl J Med. 2009 Aug 13;361[7]:649-51).

Dr. Lewis reflected on how oncologists are challenged to sort through the thousands of oncology-focused publications annually. Through social media, one can see the studies on which the experts are commenting and appreciate the nuances that contextualize the results. Focused interactions with renowned doctors, at regular intervals, require little formality.

Online journal clubs enable the sharing of ideas, opinions, multimedia resources, and references across institutional and international borders (J Gen Intern Med. 2014 Oct;29[10]:1317-8).
 

Social media in oncology: Accomplishments and promise

The development of broadband Internet, wireless connectivity, and social media for peer-to-peer and general communication are among the major technological advances that have transformed medical communication.

As an organization, COSMO aims to describe, understand, and improve the use of social media to increase the penetration of evidence-based guidelines and research insights into clinical practice (Future Oncol. 2017 Jun;13[15]:1281-5).

At the inaugural COSMO meeting, areas of progress since COSMO’s inception in 2015 were highlighted, including:

• The involvement of cancer professionals and advocates in multiple distinctive platforms.
• The development of hashtag libraries to aggregate interest groups and topics.
• The refinement of strategies for engaging advocates with attention to inclusiveness.
• A steady trajectory of growth in tweeting at scientific conferences.

An overarching theme of the COSMO meeting was “authenticity,” a virtue that is easy to admire but requires conscious, consistent effort to achieve.

Disclosure of conflicts of interest and avoiding using social media simply as a recruitment tool for clinical trials are basic components of accurate self-representation.

In addition, Dr. Lewis advocated for sharing personal experiences in a component of social media posts so oncologists can show humanity as a feature of their professional online identity and inherent nature.

Dr. Lewis disclosed consultancy with Medscape/WebMD, which are owned by the same parent company as MDedge. He also disclosed relationships with Foundation Medicine, Natera, Exelixis, QED, HalioDX, and Ipsen.


Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Sharing their personal experiences on social media can emphasize oncologists’ humanity and have substantive, beneficial effects on patient care, according to a presentation at the Collaboration for Outcomes using Social Media in Oncology (COSMO) inaugural meeting.

Mark A. Lewis, MD, explained to the COSMO meeting audience how storytelling on social media can educate and engage patients, advocates, and professional colleagues – advancing knowledge, dispelling misinformation, and promoting clinical research.

Dr. Lewis, an oncologist at Intermountain Healthcare in Salt Lake City, reflected on the bifid roles of oncologists as scientists engaged in life-long learning and humanists who can internalize and appreciate the unique character and circumstances of their patients.

Patients who have serious illnesses are necessarily aggregated by statistics. However, in an essay published in 2011, Dr. Lewis noted that “each individual patient partakes in a unique, irreproducible experiment where n = 1” (J Clin Oncol. 2011 Aug 1;29[22]:3103-4).

Dr. Lewis highlighted the duality of individual data points on a survival curve as descriptors of common disease trajectories and treatment effects. However, those data points also conceal important narratives regarding the most highly valued aspects of the doctor-patient relationship and the impact of cancer treatment on patients’ lives.

In referring to the futuristic essay “Ars Brevis,” Dr. Lewis contrasted the humanism of oncology specialists in the present day with the fictional image of data-regurgitating robots programmed to maximize the efficiency of each patient encounter (J Clin Oncol. 2013 May 10;31[14]:1792-4).

Dr. Lewis reminded attendees that to practice medicine without using both “head and heart” undermines the inherent nature of medical care.

Unfortunately, that perspective may not match the public perception of oncologists. Dr. Lewis described his experience of typing “oncologists are” into an Internet search engine and seeing the auto-complete function prompt words such as “criminals,” “evil,” “murderers,” and “confused.”

Obviously, it is hard to establish a trusting patient-doctor relationship if that is the prima facie perception of the oncology specialty.
 

Dispelling myths and creating community via social media

A primary goal of consultation with a newly-diagnosed cancer patient is for the patient to feel that the oncologist will be there to take care of them, regardless of what the future holds.

Dr. Lewis has found that social media can potentially extend that feeling to a global community of patients, caregivers, and others seeking information relevant to a cancer diagnosis. He believes that oncologists have an opportunity to dispel myths and fears by being attentive to the real-life concerns of patients.

Dr. Lewis took advantage of this opportunity when he underwent a Whipple procedure (pancreaticoduodenectomy) for a pancreatic neuroendocrine tumor. He and the hospital’s media services staff “live-tweeted” his surgery and recovery.

With those tweets, Dr. Lewis demystified each step of a major surgical procedure. From messages he received on social media, Dr. Lewis knows he made the decision to have a Whipple procedure more acceptable to other patients.

His personal medical experience notwithstanding, Dr. Lewis acknowledged that every patient’s circumstances are unique.

Oncologists cannot possibly empathize with every circumstance. However, when they show sensitivity to personal elements of the cancer experience, they shed light on the complicated role they play in patient care and can facilitate good decision-making among patients across the globe.
 

Social media for professional development and patient care

The publication of his 2011 essay was gratifying for Dr. Lewis, but the finite number of comments he received thereafter illustrated the rather limited audience that traditional academic publications have and the laborious process for subsequent interaction (J Clin Oncol. 2011 Aug 1;29[22]:3103-4).

First as an observer and later as a participant on social media, Dr. Lewis appreciated that teaching points and publications can be amplified by global distribution and the potential for informal bidirectional communication.

Social media platforms enable physicians to connect with a larger audience through participative communication, in which users develop, share, and react to content (N Engl J Med. 2009 Aug 13;361[7]:649-51).

Dr. Lewis reflected on how oncologists are challenged to sort through the thousands of oncology-focused publications annually. Through social media, one can see the studies on which the experts are commenting and appreciate the nuances that contextualize the results. Focused interactions with renowned doctors, at regular intervals, require little formality.

Online journal clubs enable the sharing of ideas, opinions, multimedia resources, and references across institutional and international borders (J Gen Intern Med. 2014 Oct;29[10]:1317-8).
 

Social media in oncology: Accomplishments and promise

The development of broadband Internet, wireless connectivity, and social media for peer-to-peer and general communication are among the major technological advances that have transformed medical communication.

As an organization, COSMO aims to describe, understand, and improve the use of social media to increase the penetration of evidence-based guidelines and research insights into clinical practice (Future Oncol. 2017 Jun;13[15]:1281-5).

At the inaugural COSMO meeting, areas of progress since COSMO’s inception in 2015 were highlighted, including:

• The involvement of cancer professionals and advocates in multiple distinctive platforms.
• The development of hashtag libraries to aggregate interest groups and topics.
• The refinement of strategies for engaging advocates with attention to inclusiveness.
• A steady trajectory of growth in tweeting at scientific conferences.

An overarching theme of the COSMO meeting was “authenticity,” a virtue that is easy to admire but requires conscious, consistent effort to achieve.

Disclosure of conflicts of interest and avoiding using social media simply as a recruitment tool for clinical trials are basic components of accurate self-representation.

In addition, Dr. Lewis advocated for sharing personal experiences in a component of social media posts so oncologists can show humanity as a feature of their professional online identity and inherent nature.

Dr. Lewis disclosed consultancy with Medscape/WebMD, which are owned by the same parent company as MDedge. He also disclosed relationships with Foundation Medicine, Natera, Exelixis, QED, HalioDX, and Ipsen.


Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Chronic lymphocytic leukemia (CLL) is the most common leukemia diagnosed in developed countries, with an estimated 21,040 new diagnoses of CLL expected in the US in 2020. ^1-3 CLL is an indolent cancer characterized by the accumulation of B-lymphocytes in the blood, marrow, and lymphoid tissues. ⁴ It has a heterogeneous clinical course; the majority of patients are observed or receive delayed treatment following diagnosis, while a minority of patients require immediate treatment. After first-line treatment, some patients experience prolonged remissions while others require retreatment within 1 or 2 years. Fortunately, advances in cancer biology and therapeutics in the last decade have increased the number of treatment options available for patients with CLL.

Until recently, most CLL treatments relied on a chemotherapy or a chemoimmunotherapy backbone; however, the last few years have seen novel therapies introduced, such as small molecule inhibitors to target molecular pathways that promote the normal development, expansion, and survival of B-cells.⁵ One such therapy is ibrutinib, a targeted Bruton tyrosine kinase inhibitor that received accelerated approval by the US Food and Drug Administration (FDA) in February 2014 for patients with CLL who received at least 1 prior therapy. The FDA later expanded this approval to include use of ibrutinib in patients with CLL with relapsed or refractory disease, with or without chromosome 17p deletion. In 2016, based on data from the RESONATE-17 study, the FDA approved ibrutinib for first-line therapy in patients with CLL.⁶

Ibrutinib’s efficacy, ease of administration and dosing (all doses are oral and fixed, rather than based on weight or body surface area), and relatively favorable safety profile have resulted in a rapid growth in its adoption.⁷ Since its adverse event (AE) profile is generally more tolerable than that of a typical chemoimmunotherapy, its use in older patients with CLL and patients with significant comorbidities is particularly appealing.⁸

However, the results of some clinical trials suggest an association between treatment with ibrutinib and an increased risk of bleeding-related events of any grade (44%) and major bleeding events (4%).^7,8 The incidence of major bleeding events was reported to be higher (9%) in one clinical trial and at 5-year follow-up, although this trial did not exclude patients receiving concomitant oral anticoagulation with warfarin.^6,9

Heterogeneity in clinical trials’ definitions of major bleeding confounded the ability to calculate bleeding risk in patients treated with ibrutinib in a systematic review and meta-analysis that called for more data.¹⁰ Additionally, patients with factors that might increase the risk of major bleeding with ibrutinib treatment were likely underrepresented in clinical trials, given the carefully selected nature of clinical trial subjects. These factors include renal or hepatic disease, gastrointestinal disease, and use of a number of concomitant medications such as antiplatelets or anticoagulant medications. Accounting for use of the latter is particularly important because patients who develop atrial fibrillation (Afib), one of the recognized AEs of treatment with ibrutinib, often are treated with anticoagulant medications in order to decrease the risk of stroke or other thromboembolic complications.

Methods

The VHA maintains the centralized US Department of Veterans Affairs Cancer Registry System (VACRS), with electronic medical record data and other sources captured in its Corporate Data Warehouse (CDW). The VHA CDW is a national repository comprising data from several VHA clinical and administrative systems. The CDW includes patient identifiers; demographics; vital status; lab information; administrative information (such as diagnostic International Statistical Classification of Diseases and Related Health Problems [ICD-9] codes); medication dispensation tables (such as outpatient fill); IV package information; and notes from radiology, pathology, outpatient and inpatient admission, discharge, and daily progress.

Registrars abstract all cancer cases within the VHA system (or diagnosed outside the VHA, if patients subsequently receive treatment in the VHA). It is estimated that VACRS captures 3% of cancer cases in the US.¹² Like most registries, VACRS captures data such as diagnosis, age, gender, race, and vital status.

Study Definitions

Prevalence of comorbidities that could increase bleeding risk was determined using administrative ICD-9-CM codes. Liver disease was identified by presence of cirrhosis, hepatitis C virus, or alcoholic liver disease using administrative codes validated by Kramer and colleagues, who reported positive and negative predictive values of 90% and 87% for cirrhosis, 93% and 92% for hepatitis C virus, and 71% and 98% for alcoholic liver disease.¹³ Similarly, end-stage liver disease was identified using a validated coding algorithm developed by Goldberg and colleagues, with a positive predictive value of 89.3%.¹⁴ The presence of controlled or uncontrolled diabetes mellitus (DM) was identified using the procedure described by Guzman and colleagues.¹⁵ Quan’s algorithm was used to calculate Charlson Comorbidity Index (CCI) based on ICD-9-CM codes for inpatient and outpatient visits within a 6-month lookback period prior to treatment initiation.¹⁶

A major bleeding event was defined as a hospitalization with an ICD-9-CM code suggestive of major bleeding as the primary reason, as defined by Lane and colleagues in their study of major bleeding related to warfarin in a cohort of patients treated within the VHA.¹⁷ Incidence rates of major bleeding events were identified during the first 6 months of treatment. Incidence of Afib—defined as an inpatient or outpatient encounter with the 427.31 ICD-9-CM code—also was examined within the first 6 months after starting treatment. The period of 6 months was chosen because bendamustine must be discontinued after 6 months.

Study Analysis

Descriptive statistics were used to examine patient demographics, disease characteristics, and treatment history from initial CLL diagnosis through end of study observation period. Categorical variables were summarized using frequencies and accompanying proportions, while a mean and standard deviation were used to summarize continuous variables. For the means of continuous variables and of categorical data, 95% CIs were used. Proportions and accompanying 95% CIs characterized treatment patterns, including line of therapy, comorbidities, and bleeding events. Treatment duration was described using mean and accompanying 95% CI. Statistical tests were not conducted for comparisons among treatment groups. Patients were censored at the end of follow-up, defined as the earliest of the following scenarios: (1) end of study observation period (December 31, 2016); (2) development of a secondary cancer; or (3) last day of contact given absence of care within the VHA for ≥ 18 months (with care defined as oncology and/or oncology/hematology visit with an associated note). Analysis was performed using R 3.4.0.

Results

Between 2010 and 2014, 2,796 patients were diagnosed and received care for CLL within the VHA. Overall, all 172 patients who were treated with ibrutinib during our inclusion period were selected. These patients were treated between January 1, 2014 and December 31, 2016, following ibrutinib’s approval in early 2014. An additional 291 patients were selected who received BR (Table). Reflecting the predominantly male population of the VHA, 282 (97%) BR patients and 167 (97%) ibrutinib patients were male. The median age at diagnosis was 67 years for BR patients and 69 years for ibrutinib patients. About 76% of patients who received ibrutinib and 82% of patients who received BR were non-Hispanic white; 17% and 14% were African American, respectively.

Less than 10% of patients receiving either ibrutinib or BR had liver disease per criteria used by Kramer and colleagues, or end-stage liver disease using criteria developed by Goldberg and colleagues.^12,13 About 5% of patients had a history of previous bleeding in the 6-month period prior to initiating either therapy. Mean CCI (excluding malignancy) score was 1.5 (range, 0-11) for the ibrutinib group, and 2.1 (range, 0-9) for the BR group. About 16% of the ibrutinib group had controlled DM and fewer than 10% had uncontrolled DM, while 4% of patients in the BR group met the criteria for controlled DM and another 4% met the criteria for uncontrolled DM.

There was very low utilization of anticoagulant or antiplatelet medication prior to initiation of ibrutinib (2.9% and 2.3%, respectively) or BR (< 1% each). In the first 6 months after treatment initiation, about 8% of patients in both ibrutinib and BR cohorts received anticoagulant medication while antiplatelet utilization was < 5% in either group.

In the BR group, 8 patients (2.7%) experienced a major bleeding event, while 14 patients (8.1%) in the ibrutinib group experienced a bleeding event (P = .008). While these numbers were too low to perform a formal statistical analysis of the association between clinical covariates and bleeding in either group, there did not seem to be an association between bleeding and liver disease or DM. Of patients who experienced a bleeding event, about 1 in 4 patients had had a prior bleeding event in both the ibrutinib and the BR groups. Interestingly, while none of the patients who experienced a bleeding event while receiving BR were taking concomitant anticoagulant medication, 3 of the 14 patients who experienced a bleeding event in the ibrutinib group showed evidence of anticoagulant utilization. Finally, the incidence of Afib (defined as patients with no evidence of Afib in the 6 months prior to treatment but with evidence of Afib in the 6 months following treatment initiation) was 4% in the BR group, and about 8% in the ibrutinib group (P = .003).

Discussion

To the authors’ knowledge, this study is the first to examine the real-world incidence of bleeding and Afib in veterans who received ibrutinib for CLL in the first year of its availability. The study found minimal use of anticoagulants and/or antiplatelet agents prior to receiving first-line ibrutinib or BR, and very low use of these agents in the first 6 months following the initiation of first-line treatment. This finding suggests a high awareness among VA providers of potential adverse effects (AEs) of ibrutinib and chemotherapy, and a careful selection of patients that lack risk factors for AEs.

In patients treated with first-line ibrutinib when compared with patients treated with first-line BR, moderate increases in bleeding (2.7% vs 8.1%, P = .008) and Afib (10.5% vs 3%, P = .003) also were observed. These results are concordant with previous findings examining the use of ibrutinib in patients with CLL.^18-20

Limitations

The results of this study should be interpreted with caution, as some limitations must be considered. The study was conducted in the early days of ibrutinib adoption. Since then, more patients have been treated with ibrutinib and for longer durations. As clinicians gain more familiarity and with ibrutinib, and as additional novel therapeutics emerge, it is possible that the initial awareness about risks for possible AEs may diminish; patients with high comorbidity burdens and concomitant medications would be especially vulnerable in cases of reduced physician vigilance.

Another limitation of this study stems from the potential for dual system use among patients treated in the VHA. Concurrent or alternating use of multiple health care systems (use of VHA and private-sector facilities) may present gaps in the reconstruction of patient histories, resulting in missing data as patients transition between commercial, the Centers for Medicare and Medicaid Services, and VHA care. As a result, the results presented here do not reflect instances where a patient experienced a bleeding event treated outside the VA.

Problems with missing data also may occur due to incomplete extraction from the electronic health record; these issues were addressed by leveraging an understanding of the multiple data marts within the CDW environment to harmonize missing and/or erroneous information through use of other data marts when possible. Lastly, this research represents a population-level study of the VHA, thus all findings are directly relevant to the VHA. The generalizability of the findings outside the VHA would depend on the characteristics of the external population.

Conclusion

Real-world evidence from a nationwide cohort of veteran patients with CLL treated with ibrutinib suggest that, while there is an association of increased bleeding-related events and Afib, the risk is comparable to those reported in previous studies.^18-20 These findings suggest that patients in real-world clinical care settings with higher levels of comorbidities may be at a slight increased risk for bleeding events and Afib.

Chronic lymphocytic leukemia (CLL) is the most common leukemia diagnosed in developed countries, with an estimated 21,040 new diagnoses of CLL expected in the US in 2020. ^1-3 CLL is an indolent cancer characterized by the accumulation of B-lymphocytes in the blood, marrow, and lymphoid tissues. ⁴ It has a heterogeneous clinical course; the majority of patients are observed or receive delayed treatment following diagnosis, while a minority of patients require immediate treatment. After first-line treatment, some patients experience prolonged remissions while others require retreatment within 1 or 2 years. Fortunately, advances in cancer biology and therapeutics in the last decade have increased the number of treatment options available for patients with CLL.

Until recently, most CLL treatments relied on a chemotherapy or a chemoimmunotherapy backbone; however, the last few years have seen novel therapies introduced, such as small molecule inhibitors to target molecular pathways that promote the normal development, expansion, and survival of B-cells.⁵ One such therapy is ibrutinib, a targeted Bruton tyrosine kinase inhibitor that received accelerated approval by the US Food and Drug Administration (FDA) in February 2014 for patients with CLL who received at least 1 prior therapy. The FDA later expanded this approval to include use of ibrutinib in patients with CLL with relapsed or refractory disease, with or without chromosome 17p deletion. In 2016, based on data from the RESONATE-17 study, the FDA approved ibrutinib for first-line therapy in patients with CLL.⁶

Ibrutinib’s efficacy, ease of administration and dosing (all doses are oral and fixed, rather than based on weight or body surface area), and relatively favorable safety profile have resulted in a rapid growth in its adoption.⁷ Since its adverse event (AE) profile is generally more tolerable than that of a typical chemoimmunotherapy, its use in older patients with CLL and patients with significant comorbidities is particularly appealing.⁸

However, the results of some clinical trials suggest an association between treatment with ibrutinib and an increased risk of bleeding-related events of any grade (44%) and major bleeding events (4%).^7,8 The incidence of major bleeding events was reported to be higher (9%) in one clinical trial and at 5-year follow-up, although this trial did not exclude patients receiving concomitant oral anticoagulation with warfarin.^6,9

Heterogeneity in clinical trials’ definitions of major bleeding confounded the ability to calculate bleeding risk in patients treated with ibrutinib in a systematic review and meta-analysis that called for more data.¹⁰ Additionally, patients with factors that might increase the risk of major bleeding with ibrutinib treatment were likely underrepresented in clinical trials, given the carefully selected nature of clinical trial subjects. These factors include renal or hepatic disease, gastrointestinal disease, and use of a number of concomitant medications such as antiplatelets or anticoagulant medications. Accounting for use of the latter is particularly important because patients who develop atrial fibrillation (Afib), one of the recognized AEs of treatment with ibrutinib, often are treated with anticoagulant medications in order to decrease the risk of stroke or other thromboembolic complications.

Methods

The VHA maintains the centralized US Department of Veterans Affairs Cancer Registry System (VACRS), with electronic medical record data and other sources captured in its Corporate Data Warehouse (CDW). The VHA CDW is a national repository comprising data from several VHA clinical and administrative systems. The CDW includes patient identifiers; demographics; vital status; lab information; administrative information (such as diagnostic International Statistical Classification of Diseases and Related Health Problems [ICD-9] codes); medication dispensation tables (such as outpatient fill); IV package information; and notes from radiology, pathology, outpatient and inpatient admission, discharge, and daily progress.

Registrars abstract all cancer cases within the VHA system (or diagnosed outside the VHA, if patients subsequently receive treatment in the VHA). It is estimated that VACRS captures 3% of cancer cases in the US.¹² Like most registries, VACRS captures data such as diagnosis, age, gender, race, and vital status.

Study Definitions

Prevalence of comorbidities that could increase bleeding risk was determined using administrative ICD-9-CM codes. Liver disease was identified by presence of cirrhosis, hepatitis C virus, or alcoholic liver disease using administrative codes validated by Kramer and colleagues, who reported positive and negative predictive values of 90% and 87% for cirrhosis, 93% and 92% for hepatitis C virus, and 71% and 98% for alcoholic liver disease.¹³ Similarly, end-stage liver disease was identified using a validated coding algorithm developed by Goldberg and colleagues, with a positive predictive value of 89.3%.¹⁴ The presence of controlled or uncontrolled diabetes mellitus (DM) was identified using the procedure described by Guzman and colleagues.¹⁵ Quan’s algorithm was used to calculate Charlson Comorbidity Index (CCI) based on ICD-9-CM codes for inpatient and outpatient visits within a 6-month lookback period prior to treatment initiation.¹⁶

A major bleeding event was defined as a hospitalization with an ICD-9-CM code suggestive of major bleeding as the primary reason, as defined by Lane and colleagues in their study of major bleeding related to warfarin in a cohort of patients treated within the VHA.¹⁷ Incidence rates of major bleeding events were identified during the first 6 months of treatment. Incidence of Afib—defined as an inpatient or outpatient encounter with the 427.31 ICD-9-CM code—also was examined within the first 6 months after starting treatment. The period of 6 months was chosen because bendamustine must be discontinued after 6 months.

Study Analysis

Descriptive statistics were used to examine patient demographics, disease characteristics, and treatment history from initial CLL diagnosis through end of study observation period. Categorical variables were summarized using frequencies and accompanying proportions, while a mean and standard deviation were used to summarize continuous variables. For the means of continuous variables and of categorical data, 95% CIs were used. Proportions and accompanying 95% CIs characterized treatment patterns, including line of therapy, comorbidities, and bleeding events. Treatment duration was described using mean and accompanying 95% CI. Statistical tests were not conducted for comparisons among treatment groups. Patients were censored at the end of follow-up, defined as the earliest of the following scenarios: (1) end of study observation period (December 31, 2016); (2) development of a secondary cancer; or (3) last day of contact given absence of care within the VHA for ≥ 18 months (with care defined as oncology and/or oncology/hematology visit with an associated note). Analysis was performed using R 3.4.0.

Results

Between 2010 and 2014, 2,796 patients were diagnosed and received care for CLL within the VHA. Overall, all 172 patients who were treated with ibrutinib during our inclusion period were selected. These patients were treated between January 1, 2014 and December 31, 2016, following ibrutinib’s approval in early 2014. An additional 291 patients were selected who received BR (Table). Reflecting the predominantly male population of the VHA, 282 (97%) BR patients and 167 (97%) ibrutinib patients were male. The median age at diagnosis was 67 years for BR patients and 69 years for ibrutinib patients. About 76% of patients who received ibrutinib and 82% of patients who received BR were non-Hispanic white; 17% and 14% were African American, respectively.

Less than 10% of patients receiving either ibrutinib or BR had liver disease per criteria used by Kramer and colleagues, or end-stage liver disease using criteria developed by Goldberg and colleagues.^12,13 About 5% of patients had a history of previous bleeding in the 6-month period prior to initiating either therapy. Mean CCI (excluding malignancy) score was 1.5 (range, 0-11) for the ibrutinib group, and 2.1 (range, 0-9) for the BR group. About 16% of the ibrutinib group had controlled DM and fewer than 10% had uncontrolled DM, while 4% of patients in the BR group met the criteria for controlled DM and another 4% met the criteria for uncontrolled DM.

There was very low utilization of anticoagulant or antiplatelet medication prior to initiation of ibrutinib (2.9% and 2.3%, respectively) or BR (< 1% each). In the first 6 months after treatment initiation, about 8% of patients in both ibrutinib and BR cohorts received anticoagulant medication while antiplatelet utilization was < 5% in either group.

In the BR group, 8 patients (2.7%) experienced a major bleeding event, while 14 patients (8.1%) in the ibrutinib group experienced a bleeding event (P = .008). While these numbers were too low to perform a formal statistical analysis of the association between clinical covariates and bleeding in either group, there did not seem to be an association between bleeding and liver disease or DM. Of patients who experienced a bleeding event, about 1 in 4 patients had had a prior bleeding event in both the ibrutinib and the BR groups. Interestingly, while none of the patients who experienced a bleeding event while receiving BR were taking concomitant anticoagulant medication, 3 of the 14 patients who experienced a bleeding event in the ibrutinib group showed evidence of anticoagulant utilization. Finally, the incidence of Afib (defined as patients with no evidence of Afib in the 6 months prior to treatment but with evidence of Afib in the 6 months following treatment initiation) was 4% in the BR group, and about 8% in the ibrutinib group (P = .003).

Discussion

To the authors’ knowledge, this study is the first to examine the real-world incidence of bleeding and Afib in veterans who received ibrutinib for CLL in the first year of its availability. The study found minimal use of anticoagulants and/or antiplatelet agents prior to receiving first-line ibrutinib or BR, and very low use of these agents in the first 6 months following the initiation of first-line treatment. This finding suggests a high awareness among VA providers of potential adverse effects (AEs) of ibrutinib and chemotherapy, and a careful selection of patients that lack risk factors for AEs.

In patients treated with first-line ibrutinib when compared with patients treated with first-line BR, moderate increases in bleeding (2.7% vs 8.1%, P = .008) and Afib (10.5% vs 3%, P = .003) also were observed. These results are concordant with previous findings examining the use of ibrutinib in patients with CLL.^18-20

Limitations

The results of this study should be interpreted with caution, as some limitations must be considered. The study was conducted in the early days of ibrutinib adoption. Since then, more patients have been treated with ibrutinib and for longer durations. As clinicians gain more familiarity and with ibrutinib, and as additional novel therapeutics emerge, it is possible that the initial awareness about risks for possible AEs may diminish; patients with high comorbidity burdens and concomitant medications would be especially vulnerable in cases of reduced physician vigilance.

Another limitation of this study stems from the potential for dual system use among patients treated in the VHA. Concurrent or alternating use of multiple health care systems (use of VHA and private-sector facilities) may present gaps in the reconstruction of patient histories, resulting in missing data as patients transition between commercial, the Centers for Medicare and Medicaid Services, and VHA care. As a result, the results presented here do not reflect instances where a patient experienced a bleeding event treated outside the VA.

Problems with missing data also may occur due to incomplete extraction from the electronic health record; these issues were addressed by leveraging an understanding of the multiple data marts within the CDW environment to harmonize missing and/or erroneous information through use of other data marts when possible. Lastly, this research represents a population-level study of the VHA, thus all findings are directly relevant to the VHA. The generalizability of the findings outside the VHA would depend on the characteristics of the external population.

Conclusion

Real-world evidence from a nationwide cohort of veteran patients with CLL treated with ibrutinib suggest that, while there is an association of increased bleeding-related events and Afib, the risk is comparable to those reported in previous studies.^18-20 These findings suggest that patients in real-world clinical care settings with higher levels of comorbidities may be at a slight increased risk for bleeding events and Afib.

Chronic lymphocytic leukemia (CLL) is the most common leukemia diagnosed in developed countries, with an estimated 21,040 new diagnoses of CLL expected in the US in 2020. ^1-3 CLL is an indolent cancer characterized by the accumulation of B-lymphocytes in the blood, marrow, and lymphoid tissues. ⁴ It has a heterogeneous clinical course; the majority of patients are observed or receive delayed treatment following diagnosis, while a minority of patients require immediate treatment. After first-line treatment, some patients experience prolonged remissions while others require retreatment within 1 or 2 years. Fortunately, advances in cancer biology and therapeutics in the last decade have increased the number of treatment options available for patients with CLL.

Until recently, most CLL treatments relied on a chemotherapy or a chemoimmunotherapy backbone; however, the last few years have seen novel therapies introduced, such as small molecule inhibitors to target molecular pathways that promote the normal development, expansion, and survival of B-cells.⁵ One such therapy is ibrutinib, a targeted Bruton tyrosine kinase inhibitor that received accelerated approval by the US Food and Drug Administration (FDA) in February 2014 for patients with CLL who received at least 1 prior therapy. The FDA later expanded this approval to include use of ibrutinib in patients with CLL with relapsed or refractory disease, with or without chromosome 17p deletion. In 2016, based on data from the RESONATE-17 study, the FDA approved ibrutinib for first-line therapy in patients with CLL.⁶

Ibrutinib’s efficacy, ease of administration and dosing (all doses are oral and fixed, rather than based on weight or body surface area), and relatively favorable safety profile have resulted in a rapid growth in its adoption.⁷ Since its adverse event (AE) profile is generally more tolerable than that of a typical chemoimmunotherapy, its use in older patients with CLL and patients with significant comorbidities is particularly appealing.⁸

However, the results of some clinical trials suggest an association between treatment with ibrutinib and an increased risk of bleeding-related events of any grade (44%) and major bleeding events (4%).^7,8 The incidence of major bleeding events was reported to be higher (9%) in one clinical trial and at 5-year follow-up, although this trial did not exclude patients receiving concomitant oral anticoagulation with warfarin.^6,9

Heterogeneity in clinical trials’ definitions of major bleeding confounded the ability to calculate bleeding risk in patients treated with ibrutinib in a systematic review and meta-analysis that called for more data.¹⁰ Additionally, patients with factors that might increase the risk of major bleeding with ibrutinib treatment were likely underrepresented in clinical trials, given the carefully selected nature of clinical trial subjects. These factors include renal or hepatic disease, gastrointestinal disease, and use of a number of concomitant medications such as antiplatelets or anticoagulant medications. Accounting for use of the latter is particularly important because patients who develop atrial fibrillation (Afib), one of the recognized AEs of treatment with ibrutinib, often are treated with anticoagulant medications in order to decrease the risk of stroke or other thromboembolic complications.

Methods

The VHA maintains the centralized US Department of Veterans Affairs Cancer Registry System (VACRS), with electronic medical record data and other sources captured in its Corporate Data Warehouse (CDW). The VHA CDW is a national repository comprising data from several VHA clinical and administrative systems. The CDW includes patient identifiers; demographics; vital status; lab information; administrative information (such as diagnostic International Statistical Classification of Diseases and Related Health Problems [ICD-9] codes); medication dispensation tables (such as outpatient fill); IV package information; and notes from radiology, pathology, outpatient and inpatient admission, discharge, and daily progress.

Registrars abstract all cancer cases within the VHA system (or diagnosed outside the VHA, if patients subsequently receive treatment in the VHA). It is estimated that VACRS captures 3% of cancer cases in the US.¹² Like most registries, VACRS captures data such as diagnosis, age, gender, race, and vital status.

Study Definitions

Prevalence of comorbidities that could increase bleeding risk was determined using administrative ICD-9-CM codes. Liver disease was identified by presence of cirrhosis, hepatitis C virus, or alcoholic liver disease using administrative codes validated by Kramer and colleagues, who reported positive and negative predictive values of 90% and 87% for cirrhosis, 93% and 92% for hepatitis C virus, and 71% and 98% for alcoholic liver disease.¹³ Similarly, end-stage liver disease was identified using a validated coding algorithm developed by Goldberg and colleagues, with a positive predictive value of 89.3%.¹⁴ The presence of controlled or uncontrolled diabetes mellitus (DM) was identified using the procedure described by Guzman and colleagues.¹⁵ Quan’s algorithm was used to calculate Charlson Comorbidity Index (CCI) based on ICD-9-CM codes for inpatient and outpatient visits within a 6-month lookback period prior to treatment initiation.¹⁶

A major bleeding event was defined as a hospitalization with an ICD-9-CM code suggestive of major bleeding as the primary reason, as defined by Lane and colleagues in their study of major bleeding related to warfarin in a cohort of patients treated within the VHA.¹⁷ Incidence rates of major bleeding events were identified during the first 6 months of treatment. Incidence of Afib—defined as an inpatient or outpatient encounter with the 427.31 ICD-9-CM code—also was examined within the first 6 months after starting treatment. The period of 6 months was chosen because bendamustine must be discontinued after 6 months.

Study Analysis

Descriptive statistics were used to examine patient demographics, disease characteristics, and treatment history from initial CLL diagnosis through end of study observation period. Categorical variables were summarized using frequencies and accompanying proportions, while a mean and standard deviation were used to summarize continuous variables. For the means of continuous variables and of categorical data, 95% CIs were used. Proportions and accompanying 95% CIs characterized treatment patterns, including line of therapy, comorbidities, and bleeding events. Treatment duration was described using mean and accompanying 95% CI. Statistical tests were not conducted for comparisons among treatment groups. Patients were censored at the end of follow-up, defined as the earliest of the following scenarios: (1) end of study observation period (December 31, 2016); (2) development of a secondary cancer; or (3) last day of contact given absence of care within the VHA for ≥ 18 months (with care defined as oncology and/or oncology/hematology visit with an associated note). Analysis was performed using R 3.4.0.

Results

Between 2010 and 2014, 2,796 patients were diagnosed and received care for CLL within the VHA. Overall, all 172 patients who were treated with ibrutinib during our inclusion period were selected. These patients were treated between January 1, 2014 and December 31, 2016, following ibrutinib’s approval in early 2014. An additional 291 patients were selected who received BR (Table). Reflecting the predominantly male population of the VHA, 282 (97%) BR patients and 167 (97%) ibrutinib patients were male. The median age at diagnosis was 67 years for BR patients and 69 years for ibrutinib patients. About 76% of patients who received ibrutinib and 82% of patients who received BR were non-Hispanic white; 17% and 14% were African American, respectively.

Less than 10% of patients receiving either ibrutinib or BR had liver disease per criteria used by Kramer and colleagues, or end-stage liver disease using criteria developed by Goldberg and colleagues.^12,13 About 5% of patients had a history of previous bleeding in the 6-month period prior to initiating either therapy. Mean CCI (excluding malignancy) score was 1.5 (range, 0-11) for the ibrutinib group, and 2.1 (range, 0-9) for the BR group. About 16% of the ibrutinib group had controlled DM and fewer than 10% had uncontrolled DM, while 4% of patients in the BR group met the criteria for controlled DM and another 4% met the criteria for uncontrolled DM.

There was very low utilization of anticoagulant or antiplatelet medication prior to initiation of ibrutinib (2.9% and 2.3%, respectively) or BR (< 1% each). In the first 6 months after treatment initiation, about 8% of patients in both ibrutinib and BR cohorts received anticoagulant medication while antiplatelet utilization was < 5% in either group.

In the BR group, 8 patients (2.7%) experienced a major bleeding event, while 14 patients (8.1%) in the ibrutinib group experienced a bleeding event (P = .008). While these numbers were too low to perform a formal statistical analysis of the association between clinical covariates and bleeding in either group, there did not seem to be an association between bleeding and liver disease or DM. Of patients who experienced a bleeding event, about 1 in 4 patients had had a prior bleeding event in both the ibrutinib and the BR groups. Interestingly, while none of the patients who experienced a bleeding event while receiving BR were taking concomitant anticoagulant medication, 3 of the 14 patients who experienced a bleeding event in the ibrutinib group showed evidence of anticoagulant utilization. Finally, the incidence of Afib (defined as patients with no evidence of Afib in the 6 months prior to treatment but with evidence of Afib in the 6 months following treatment initiation) was 4% in the BR group, and about 8% in the ibrutinib group (P = .003).

Discussion

To the authors’ knowledge, this study is the first to examine the real-world incidence of bleeding and Afib in veterans who received ibrutinib for CLL in the first year of its availability. The study found minimal use of anticoagulants and/or antiplatelet agents prior to receiving first-line ibrutinib or BR, and very low use of these agents in the first 6 months following the initiation of first-line treatment. This finding suggests a high awareness among VA providers of potential adverse effects (AEs) of ibrutinib and chemotherapy, and a careful selection of patients that lack risk factors for AEs.

In patients treated with first-line ibrutinib when compared with patients treated with first-line BR, moderate increases in bleeding (2.7% vs 8.1%, P = .008) and Afib (10.5% vs 3%, P = .003) also were observed. These results are concordant with previous findings examining the use of ibrutinib in patients with CLL.^18-20

Limitations

The results of this study should be interpreted with caution, as some limitations must be considered. The study was conducted in the early days of ibrutinib adoption. Since then, more patients have been treated with ibrutinib and for longer durations. As clinicians gain more familiarity and with ibrutinib, and as additional novel therapeutics emerge, it is possible that the initial awareness about risks for possible AEs may diminish; patients with high comorbidity burdens and concomitant medications would be especially vulnerable in cases of reduced physician vigilance.

Another limitation of this study stems from the potential for dual system use among patients treated in the VHA. Concurrent or alternating use of multiple health care systems (use of VHA and private-sector facilities) may present gaps in the reconstruction of patient histories, resulting in missing data as patients transition between commercial, the Centers for Medicare and Medicaid Services, and VHA care. As a result, the results presented here do not reflect instances where a patient experienced a bleeding event treated outside the VA.

Problems with missing data also may occur due to incomplete extraction from the electronic health record; these issues were addressed by leveraging an understanding of the multiple data marts within the CDW environment to harmonize missing and/or erroneous information through use of other data marts when possible. Lastly, this research represents a population-level study of the VHA, thus all findings are directly relevant to the VHA. The generalizability of the findings outside the VHA would depend on the characteristics of the external population.

Conclusion

Real-world evidence from a nationwide cohort of veteran patients with CLL treated with ibrutinib suggest that, while there is an association of increased bleeding-related events and Afib, the risk is comparable to those reported in previous studies.^18-20 These findings suggest that patients in real-world clinical care settings with higher levels of comorbidities may be at a slight increased risk for bleeding events and Afib.

Mitochondrial DNA (mtDNA) copy number alterations are known to occur in acute myeloid leukemia (AML), however their biological significance has not been well studied. Pediatric AML has a distinct biology, different from adults, and with heterogeneous clinical outcomes, the biological basis of which are not well understood, according to researchers Shilpi Chaudhary, PhD, of the All India Institute of Medical Sciences, New Delhi, and colleagues.

wir0man/GettyImages

Their analysis of 123 pediatric patients with AML found that mtDNA copy number was an independent predictor of aggressive disease, lower event-free survival, and overall survival, according to a report published in Mitochondrion.

In an attempt to find the biological factors involved in the increased mtDNA copy numbers and their effect on the development and aggressiveness of pediatric AML, the researchers studied the regulation and significance of mtDNA copy number in pediatric AML patients using quantitative real time–polymerase chain reaction, as well as in vitro studies. For patients, results were correlated with clinical outcomes.

Mitochondrial biogenesis genes (TFAM, POLG, POLRMT) and two regulator of mitochondrial biogenesis, MYC and PGC1A, were also assessed, according to Dr. Chaudhary and colleagues.
 

Predictive results

MtDNA copy number was significantly higher in patients, compared with controls (P < .001) and was found to be an independent predictor of aggressive disease (P = .006), lower event-free survival (P = .033), and overall survival (P = .007).

TFAM, POLG & POLRMT and ND3 were also found to be significantly up-regulated in patients, compared with controls as was the expression of the mitochondrial biogenesis regulator MYC (P < .001). However, correlation analysis showed that mtDNA copy number was not associated with the expression of these genes.

In contrast, PGC1A expression was not significantly different in patients, compared with controls overall, although there was a subset of patients whose PGC1A expression was extremely high, according to the researchers.

Importantly, however, in the subset of patients with high PGC1A expression (n = 28), mtDNA copy number had a positive correlation with PGC1A expression (P = .013). On the other hand, among patients with low MYC expression (n = 27), there was no correlation of mtDNA copy number with either PGC1A or MYC expression.

These results were corroborated in in vitro studies, where treatment with the inhibitor tigecycline led to a significant decrease in expression of MYC (P < .001), TFAM (P = .037) and ND3 (P = .010) but resulted in no significant change in mtDNA copy number (P = .23) or expression of PGC1A (P = .10).
 

Therapeutic candidate?

In contrast to the case of MYC, in vitro PGC1A inhibition significantly reduced mtDNA copy number in along with expression of TFAM and even expression of POLG and POLRMT at higher concentration.

“This observation is in line with our finding in patient samples as well that PGC1A expression positively correlated with mtDNA copy number, more so in patients with higher PGC1A expression,” the researchers stated.

“This makes it plausible to infer that PGC1A may have a possible role in enhancing mtDNA copy number in AML patients, likely independent of MYC,” they added. “Therefore, a strategy of designing therapeutics using already approved inhibitors targeting PGC1A may be an exciting area of therapeutic intervention.”

The authors reported that they have no competing financial conflicts of interests.

[email protected]

Mitochondrial DNA (mtDNA) copy number alterations are known to occur in acute myeloid leukemia (AML), however their biological significance has not been well studied. Pediatric AML has a distinct biology, different from adults, and with heterogeneous clinical outcomes, the biological basis of which are not well understood, according to researchers Shilpi Chaudhary, PhD, of the All India Institute of Medical Sciences, New Delhi, and colleagues.

wir0man/GettyImages

Their analysis of 123 pediatric patients with AML found that mtDNA copy number was an independent predictor of aggressive disease, lower event-free survival, and overall survival, according to a report published in Mitochondrion.

In an attempt to find the biological factors involved in the increased mtDNA copy numbers and their effect on the development and aggressiveness of pediatric AML, the researchers studied the regulation and significance of mtDNA copy number in pediatric AML patients using quantitative real time–polymerase chain reaction, as well as in vitro studies. For patients, results were correlated with clinical outcomes.

Mitochondrial biogenesis genes (TFAM, POLG, POLRMT) and two regulator of mitochondrial biogenesis, MYC and PGC1A, were also assessed, according to Dr. Chaudhary and colleagues.
 

Predictive results

MtDNA copy number was significantly higher in patients, compared with controls (P < .001) and was found to be an independent predictor of aggressive disease (P = .006), lower event-free survival (P = .033), and overall survival (P = .007).

TFAM, POLG & POLRMT and ND3 were also found to be significantly up-regulated in patients, compared with controls as was the expression of the mitochondrial biogenesis regulator MYC (P < .001). However, correlation analysis showed that mtDNA copy number was not associated with the expression of these genes.

In contrast, PGC1A expression was not significantly different in patients, compared with controls overall, although there was a subset of patients whose PGC1A expression was extremely high, according to the researchers.

Importantly, however, in the subset of patients with high PGC1A expression (n = 28), mtDNA copy number had a positive correlation with PGC1A expression (P = .013). On the other hand, among patients with low MYC expression (n = 27), there was no correlation of mtDNA copy number with either PGC1A or MYC expression.

These results were corroborated in in vitro studies, where treatment with the inhibitor tigecycline led to a significant decrease in expression of MYC (P < .001), TFAM (P = .037) and ND3 (P = .010) but resulted in no significant change in mtDNA copy number (P = .23) or expression of PGC1A (P = .10).
 

Therapeutic candidate?

In contrast to the case of MYC, in vitro PGC1A inhibition significantly reduced mtDNA copy number in along with expression of TFAM and even expression of POLG and POLRMT at higher concentration.

“This observation is in line with our finding in patient samples as well that PGC1A expression positively correlated with mtDNA copy number, more so in patients with higher PGC1A expression,” the researchers stated.

“This makes it plausible to infer that PGC1A may have a possible role in enhancing mtDNA copy number in AML patients, likely independent of MYC,” they added. “Therefore, a strategy of designing therapeutics using already approved inhibitors targeting PGC1A may be an exciting area of therapeutic intervention.”

The authors reported that they have no competing financial conflicts of interests.

[email protected]

Mitochondrial DNA (mtDNA) copy number alterations are known to occur in acute myeloid leukemia (AML), however their biological significance has not been well studied. Pediatric AML has a distinct biology, different from adults, and with heterogeneous clinical outcomes, the biological basis of which are not well understood, according to researchers Shilpi Chaudhary, PhD, of the All India Institute of Medical Sciences, New Delhi, and colleagues.

wir0man/GettyImages

Their analysis of 123 pediatric patients with AML found that mtDNA copy number was an independent predictor of aggressive disease, lower event-free survival, and overall survival, according to a report published in Mitochondrion.

In an attempt to find the biological factors involved in the increased mtDNA copy numbers and their effect on the development and aggressiveness of pediatric AML, the researchers studied the regulation and significance of mtDNA copy number in pediatric AML patients using quantitative real time–polymerase chain reaction, as well as in vitro studies. For patients, results were correlated with clinical outcomes.

Mitochondrial biogenesis genes (TFAM, POLG, POLRMT) and two regulator of mitochondrial biogenesis, MYC and PGC1A, were also assessed, according to Dr. Chaudhary and colleagues.
 

Predictive results

MtDNA copy number was significantly higher in patients, compared with controls (P < .001) and was found to be an independent predictor of aggressive disease (P = .006), lower event-free survival (P = .033), and overall survival (P = .007).

TFAM, POLG & POLRMT and ND3 were also found to be significantly up-regulated in patients, compared with controls as was the expression of the mitochondrial biogenesis regulator MYC (P < .001). However, correlation analysis showed that mtDNA copy number was not associated with the expression of these genes.

In contrast, PGC1A expression was not significantly different in patients, compared with controls overall, although there was a subset of patients whose PGC1A expression was extremely high, according to the researchers.

Importantly, however, in the subset of patients with high PGC1A expression (n = 28), mtDNA copy number had a positive correlation with PGC1A expression (P = .013). On the other hand, among patients with low MYC expression (n = 27), there was no correlation of mtDNA copy number with either PGC1A or MYC expression.

These results were corroborated in in vitro studies, where treatment with the inhibitor tigecycline led to a significant decrease in expression of MYC (P < .001), TFAM (P = .037) and ND3 (P = .010) but resulted in no significant change in mtDNA copy number (P = .23) or expression of PGC1A (P = .10).
 

Therapeutic candidate?

In contrast to the case of MYC, in vitro PGC1A inhibition significantly reduced mtDNA copy number in along with expression of TFAM and even expression of POLG and POLRMT at higher concentration.

“This observation is in line with our finding in patient samples as well that PGC1A expression positively correlated with mtDNA copy number, more so in patients with higher PGC1A expression,” the researchers stated.

“This makes it plausible to infer that PGC1A may have a possible role in enhancing mtDNA copy number in AML patients, likely independent of MYC,” they added. “Therefore, a strategy of designing therapeutics using already approved inhibitors targeting PGC1A may be an exciting area of therapeutic intervention.”

The authors reported that they have no competing financial conflicts of interests.

[email protected]

Therapy-related acute myeloid leukemia (t-AML) occurs as a complication of chemotherapy and/or radiotherapy for previous cancer or for nonmalignant disorders, with an estimated prevalence of 10%-15% of all AML cases, according to Ram Vasudevan Nampoothiri, MD, and colleagues at the Princess Margaret Cancer Center, University of Toronto.

The Armed Forces Institute of Pathology/Public Domain

Dr. Nampoothiri and colleagues performed a retrospective study of 68 patients with t-AML who underwent hematopoietic stem cell transplantation (HSCT) at their institution. They found significant predictors of reduced overall survival, including chromosomal rearrangements, induction regimens, donor type, patient performance status, and the type of graft-versus-host disease (GVHD) prophylaxis the patients received, as reported in Hematology/Oncology and Stem Cell Therapy.
 

Some populations benefit

Among the 68 patients studied, a total of 59.9% were women; and the median age was 56.5 years. All patients were analyzed for prior malignancy, therapy, time to diagnosis of t-AML, transplant details, relapse-free survival, overall survival, and predictors of outcomes.

At 2 years, the cumulative incidence of relapse, nonrelapse mortality, relapse-free survival, and overall survival were 17.9%, 34.5%, 47.6%, and 49.3%, respectively. Overall, acute and chronic GVHD occurred in 39 (57.4%) and 23 (33.8%) patients, respectively, according to the researchers.

The significant predictors of reduced overall survival were the presence of the 11q23 chromosomal rearrangement (hazard ratio, 3.24), use of induction regimens other than fludarabine, cytarabine, idarubicin, and granulocyte colony-stimulating factor or 7 + 3 (HR, 3.65), use of haploidentical donors (HR, 3.48), an Eastern Cooperative Oncology Group performance status of 2 or higher (HR, 5.83), and use of cyclosporine A–methotrexate as GVHD prophylaxis (HR, 2.41).

The researchers also found that a significant decrease in survival was seen with an increasing number of any of these prognostic factors.
 

A growing need

The incidence of t-AML is increasing because of longer life expectancy of the general population and also because of the improved survival of patients treated with chemotherapy and/or radiation for prior malignancies, according to the researchers.

They concluded that, even with this increasing prevalence and normally poor prognosis, “patients of t-AML having good-risk karyotypes, good performance status, and having HLA-matched donors have favorable outcomes after allo-HSCT.”

The authors reported that they had no competing financial interests.

[email protected]

Therapy-related acute myeloid leukemia (t-AML) occurs as a complication of chemotherapy and/or radiotherapy for previous cancer or for nonmalignant disorders, with an estimated prevalence of 10%-15% of all AML cases, according to Ram Vasudevan Nampoothiri, MD, and colleagues at the Princess Margaret Cancer Center, University of Toronto.

The Armed Forces Institute of Pathology/Public Domain

Dr. Nampoothiri and colleagues performed a retrospective study of 68 patients with t-AML who underwent hematopoietic stem cell transplantation (HSCT) at their institution. They found significant predictors of reduced overall survival, including chromosomal rearrangements, induction regimens, donor type, patient performance status, and the type of graft-versus-host disease (GVHD) prophylaxis the patients received, as reported in Hematology/Oncology and Stem Cell Therapy.
 

Some populations benefit

Among the 68 patients studied, a total of 59.9% were women; and the median age was 56.5 years. All patients were analyzed for prior malignancy, therapy, time to diagnosis of t-AML, transplant details, relapse-free survival, overall survival, and predictors of outcomes.

At 2 years, the cumulative incidence of relapse, nonrelapse mortality, relapse-free survival, and overall survival were 17.9%, 34.5%, 47.6%, and 49.3%, respectively. Overall, acute and chronic GVHD occurred in 39 (57.4%) and 23 (33.8%) patients, respectively, according to the researchers.

The significant predictors of reduced overall survival were the presence of the 11q23 chromosomal rearrangement (hazard ratio, 3.24), use of induction regimens other than fludarabine, cytarabine, idarubicin, and granulocyte colony-stimulating factor or 7 + 3 (HR, 3.65), use of haploidentical donors (HR, 3.48), an Eastern Cooperative Oncology Group performance status of 2 or higher (HR, 5.83), and use of cyclosporine A–methotrexate as GVHD prophylaxis (HR, 2.41).

The researchers also found that a significant decrease in survival was seen with an increasing number of any of these prognostic factors.
 

A growing need

The incidence of t-AML is increasing because of longer life expectancy of the general population and also because of the improved survival of patients treated with chemotherapy and/or radiation for prior malignancies, according to the researchers.

They concluded that, even with this increasing prevalence and normally poor prognosis, “patients of t-AML having good-risk karyotypes, good performance status, and having HLA-matched donors have favorable outcomes after allo-HSCT.”

The authors reported that they had no competing financial interests.

[email protected]

Therapy-related acute myeloid leukemia (t-AML) occurs as a complication of chemotherapy and/or radiotherapy for previous cancer or for nonmalignant disorders, with an estimated prevalence of 10%-15% of all AML cases, according to Ram Vasudevan Nampoothiri, MD, and colleagues at the Princess Margaret Cancer Center, University of Toronto.

The Armed Forces Institute of Pathology/Public Domain

Dr. Nampoothiri and colleagues performed a retrospective study of 68 patients with t-AML who underwent hematopoietic stem cell transplantation (HSCT) at their institution. They found significant predictors of reduced overall survival, including chromosomal rearrangements, induction regimens, donor type, patient performance status, and the type of graft-versus-host disease (GVHD) prophylaxis the patients received, as reported in Hematology/Oncology and Stem Cell Therapy.
 

Some populations benefit

Among the 68 patients studied, a total of 59.9% were women; and the median age was 56.5 years. All patients were analyzed for prior malignancy, therapy, time to diagnosis of t-AML, transplant details, relapse-free survival, overall survival, and predictors of outcomes.

At 2 years, the cumulative incidence of relapse, nonrelapse mortality, relapse-free survival, and overall survival were 17.9%, 34.5%, 47.6%, and 49.3%, respectively. Overall, acute and chronic GVHD occurred in 39 (57.4%) and 23 (33.8%) patients, respectively, according to the researchers.

The significant predictors of reduced overall survival were the presence of the 11q23 chromosomal rearrangement (hazard ratio, 3.24), use of induction regimens other than fludarabine, cytarabine, idarubicin, and granulocyte colony-stimulating factor or 7 + 3 (HR, 3.65), use of haploidentical donors (HR, 3.48), an Eastern Cooperative Oncology Group performance status of 2 or higher (HR, 5.83), and use of cyclosporine A–methotrexate as GVHD prophylaxis (HR, 2.41).

The researchers also found that a significant decrease in survival was seen with an increasing number of any of these prognostic factors.
 

A growing need

The incidence of t-AML is increasing because of longer life expectancy of the general population and also because of the improved survival of patients treated with chemotherapy and/or radiation for prior malignancies, according to the researchers.

They concluded that, even with this increasing prevalence and normally poor prognosis, “patients of t-AML having good-risk karyotypes, good performance status, and having HLA-matched donors have favorable outcomes after allo-HSCT.”

The authors reported that they had no competing financial interests.

[email protected]

Chronic lymphocytic leukemia (CLL) is a clinically heterogeneous disease associated with several known genetic abnormalities, including 17p deletion (del[17p]), 11q deletion (del[11q]), and TP53 gene mutations, which are adverse prognostic markers among patients treated with chemoimmunotherapy.

The Bruton tyrosine kinase (BTK) inhibitor ibrutinib is approved for patients with untreated, relapsed, or refractory disease, including those with del(17p). Clinicians will soon have the chance to pair it with ublituximab, a next-generation, glycoengineered, type I, anti-CD20 monoclonal antibody that binds to a unique epitope on CD20, differentiating it from rituximab, ofatumumab, and obinutuzumab. Results from the phase 3 GENUINE trial, which were recently published in The Lancet Haematology, showed that ublituximab plus ibrutinib was superior to ibrutinib alone for patients with relapsed or refractory high-risk CLL.

This news organization spoke with Jennifer R. Brown, MD, PhD, director of the CLL Center and institute physician at the Dana-Farber Cancer Institute and professor of medicine at Harvard Medical School, both in Boston, about the GENUINE trial and its potential impact on treatment choices going forward.
 

What type of patients were treated in the GENUINE trial?

Dr. Brown: This is a trial among relapsed/refractory CLL patients with 17p or 11q deletion or TP53 mutation. Patients aged 18 years or older with CLL who warranted treatment, as defined by International Workshop on CLL criteria, were eligible if they had previously received at least two cycles of at least one standard treatment regimen, had an Eastern Cooperative Oncology Group performance status of 2 or lower, and had high-risk cytogenetics, defined as the presence of at least one of del(17p), del(11q), or TP53 mutation confirmed by a central laboratory with fluorescence in situ hybridization and/or next-generation sequencing.

What were the main outcomes of the trial?

Originally, the GENUINE trial had coprimary endpoints of progression-free survival (PFS) and overall response rate. Because of slow accrual, it was amended to have one primary endpoint of independent review committee (IRC)–assessed ORR.

IRC-assessed ORR was improved from 65% to 83% with the addition of ublituximab. PFS also improved significantly in the ublituximab group, with an even greater improvement when the analysis was limited to those with del(17p) or TP53 aberrancy, but this outcome was limited by the reduced sample size of the study as well as the relatively short PFS of the ibrutinib arm.

After a median follow-up of 41.6 months, the median IRC-assessed PFS in all treated patients was not reached in the ublituximab plus ibrutinib group after 15 PFS events but was 35.9 months in the ibrutinib group after 25 PFS events (hazard ratio, 0.46; 95% confidence interval, 0.24-0.87; P = .016).

Undetectable minimal residual disease was also seen in 42% of the combination arm, compared with 6% of the ibrutinib arm.
 

What types of adverse events were found in the trial?

The researchers found mostly mild and known side effects of ibrutinib. More atrial fibrillation and neutropenia were seen in the antibody group, but this was not marked.

Most adverse events were of grade 1 or 2. The most common grade 3 and 4 adverse events were neutropenia (11 [19%] patients in the ublituximab plus ibrutinib group and 7 [12%] in the ibrutinib group), anemia (5 [8%] and 5 [9%], respectively), and diarrhea (6 [10%] and 3 [5%], respectively).
 

What about serious adverse events?

Hospitalization from infection was seen, as expected. There were two cardiac arrests and an unexplained death, across both arms, which was concerning, given the known association of ibrutinib with ventricular arrhythmia and sudden death. There were also several hemorrhages, including one fatal one, which was again consistent with the known side effects of ibrutinib.

Are there treatments comparable with ublituximab plus ibrutinib that clinicians should perhaps first consider using?

In terms of other anti-CD20 antibodies, we have two randomized trials that have failed to show a benefit from adding rituximab to ibrutinib.

Obinutuzumab, like ublituximab, is also a next-generation glycoengineered antibody, and it is reasonably likely that it might lead to similar results. However, the only data we have on ibrutinib with obinutuzumab are from a single arm in a more heterogeneous, lower-risk patient population, and it is unlikely that a randomized comparison will ever be done.
 

On the basis of these trial results, how would you use the combination of ublituximab and ibrutinib for your patients?

I would consider the addition of ublituximab to a BTK inhibitor in high-risk patients (once ublituximab is approved). I already usually use a next-generation BTK inhibitor rather than ibrutinib.

Are there any other implications of the GENUINE trial?

I think this trial underscores the importance of studying genetic subgroups of patients separately. In this case, that was done in high-risk patients, but this observation likely also applies to low-risk patients.

Most trials to date have enrolled unselected patient populations, often without stratification, and their results therefore tend to obscure the outcomes in both the very high risk (as studied here) and in the low risk (patients with immunoglobulin heavy chain variable region gene mutations).

Dr. Brown has served as a consultant for AbbVie, Acerta/AstraZeneca, Beigene, Bristol-Myers Squibb/Juno/Celgene, Catapult, Genentech/Roche, Janssen, MEI Pharma, Morphosys, and Novartis, and has received research funding from Gilead, Loxo/Lilly, TG Therapeutics, Verastem/SecuraBio.

A version of this article first appeared on Medscape.com.

Chronic lymphocytic leukemia (CLL) is a clinically heterogeneous disease associated with several known genetic abnormalities, including 17p deletion (del[17p]), 11q deletion (del[11q]), and TP53 gene mutations, which are adverse prognostic markers among patients treated with chemoimmunotherapy.

The Bruton tyrosine kinase (BTK) inhibitor ibrutinib is approved for patients with untreated, relapsed, or refractory disease, including those with del(17p). Clinicians will soon have the chance to pair it with ublituximab, a next-generation, glycoengineered, type I, anti-CD20 monoclonal antibody that binds to a unique epitope on CD20, differentiating it from rituximab, ofatumumab, and obinutuzumab. Results from the phase 3 GENUINE trial, which were recently published in The Lancet Haematology, showed that ublituximab plus ibrutinib was superior to ibrutinib alone for patients with relapsed or refractory high-risk CLL.

This news organization spoke with Jennifer R. Brown, MD, PhD, director of the CLL Center and institute physician at the Dana-Farber Cancer Institute and professor of medicine at Harvard Medical School, both in Boston, about the GENUINE trial and its potential impact on treatment choices going forward.
 

What type of patients were treated in the GENUINE trial?

Dr. Brown: This is a trial among relapsed/refractory CLL patients with 17p or 11q deletion or TP53 mutation. Patients aged 18 years or older with CLL who warranted treatment, as defined by International Workshop on CLL criteria, were eligible if they had previously received at least two cycles of at least one standard treatment regimen, had an Eastern Cooperative Oncology Group performance status of 2 or lower, and had high-risk cytogenetics, defined as the presence of at least one of del(17p), del(11q), or TP53 mutation confirmed by a central laboratory with fluorescence in situ hybridization and/or next-generation sequencing.

What were the main outcomes of the trial?

Originally, the GENUINE trial had coprimary endpoints of progression-free survival (PFS) and overall response rate. Because of slow accrual, it was amended to have one primary endpoint of independent review committee (IRC)–assessed ORR.

IRC-assessed ORR was improved from 65% to 83% with the addition of ublituximab. PFS also improved significantly in the ublituximab group, with an even greater improvement when the analysis was limited to those with del(17p) or TP53 aberrancy, but this outcome was limited by the reduced sample size of the study as well as the relatively short PFS of the ibrutinib arm.

After a median follow-up of 41.6 months, the median IRC-assessed PFS in all treated patients was not reached in the ublituximab plus ibrutinib group after 15 PFS events but was 35.9 months in the ibrutinib group after 25 PFS events (hazard ratio, 0.46; 95% confidence interval, 0.24-0.87; P = .016).

Undetectable minimal residual disease was also seen in 42% of the combination arm, compared with 6% of the ibrutinib arm.
 

What types of adverse events were found in the trial?

The researchers found mostly mild and known side effects of ibrutinib. More atrial fibrillation and neutropenia were seen in the antibody group, but this was not marked.

Most adverse events were of grade 1 or 2. The most common grade 3 and 4 adverse events were neutropenia (11 [19%] patients in the ublituximab plus ibrutinib group and 7 [12%] in the ibrutinib group), anemia (5 [8%] and 5 [9%], respectively), and diarrhea (6 [10%] and 3 [5%], respectively).
 

What about serious adverse events?

Hospitalization from infection was seen, as expected. There were two cardiac arrests and an unexplained death, across both arms, which was concerning, given the known association of ibrutinib with ventricular arrhythmia and sudden death. There were also several hemorrhages, including one fatal one, which was again consistent with the known side effects of ibrutinib.

Are there treatments comparable with ublituximab plus ibrutinib that clinicians should perhaps first consider using?

In terms of other anti-CD20 antibodies, we have two randomized trials that have failed to show a benefit from adding rituximab to ibrutinib.

Obinutuzumab, like ublituximab, is also a next-generation glycoengineered antibody, and it is reasonably likely that it might lead to similar results. However, the only data we have on ibrutinib with obinutuzumab are from a single arm in a more heterogeneous, lower-risk patient population, and it is unlikely that a randomized comparison will ever be done.
 

On the basis of these trial results, how would you use the combination of ublituximab and ibrutinib for your patients?

I would consider the addition of ublituximab to a BTK inhibitor in high-risk patients (once ublituximab is approved). I already usually use a next-generation BTK inhibitor rather than ibrutinib.

Are there any other implications of the GENUINE trial?

I think this trial underscores the importance of studying genetic subgroups of patients separately. In this case, that was done in high-risk patients, but this observation likely also applies to low-risk patients.

Most trials to date have enrolled unselected patient populations, often without stratification, and their results therefore tend to obscure the outcomes in both the very high risk (as studied here) and in the low risk (patients with immunoglobulin heavy chain variable region gene mutations).

Dr. Brown has served as a consultant for AbbVie, Acerta/AstraZeneca, Beigene, Bristol-Myers Squibb/Juno/Celgene, Catapult, Genentech/Roche, Janssen, MEI Pharma, Morphosys, and Novartis, and has received research funding from Gilead, Loxo/Lilly, TG Therapeutics, Verastem/SecuraBio.

A version of this article first appeared on Medscape.com.

Chronic lymphocytic leukemia (CLL) is a clinically heterogeneous disease associated with several known genetic abnormalities, including 17p deletion (del[17p]), 11q deletion (del[11q]), and TP53 gene mutations, which are adverse prognostic markers among patients treated with chemoimmunotherapy.

The Bruton tyrosine kinase (BTK) inhibitor ibrutinib is approved for patients with untreated, relapsed, or refractory disease, including those with del(17p). Clinicians will soon have the chance to pair it with ublituximab, a next-generation, glycoengineered, type I, anti-CD20 monoclonal antibody that binds to a unique epitope on CD20, differentiating it from rituximab, ofatumumab, and obinutuzumab. Results from the phase 3 GENUINE trial, which were recently published in The Lancet Haematology, showed that ublituximab plus ibrutinib was superior to ibrutinib alone for patients with relapsed or refractory high-risk CLL.

This news organization spoke with Jennifer R. Brown, MD, PhD, director of the CLL Center and institute physician at the Dana-Farber Cancer Institute and professor of medicine at Harvard Medical School, both in Boston, about the GENUINE trial and its potential impact on treatment choices going forward.
 

What type of patients were treated in the GENUINE trial?

Dr. Brown: This is a trial among relapsed/refractory CLL patients with 17p or 11q deletion or TP53 mutation. Patients aged 18 years or older with CLL who warranted treatment, as defined by International Workshop on CLL criteria, were eligible if they had previously received at least two cycles of at least one standard treatment regimen, had an Eastern Cooperative Oncology Group performance status of 2 or lower, and had high-risk cytogenetics, defined as the presence of at least one of del(17p), del(11q), or TP53 mutation confirmed by a central laboratory with fluorescence in situ hybridization and/or next-generation sequencing.

What were the main outcomes of the trial?

Originally, the GENUINE trial had coprimary endpoints of progression-free survival (PFS) and overall response rate. Because of slow accrual, it was amended to have one primary endpoint of independent review committee (IRC)–assessed ORR.

IRC-assessed ORR was improved from 65% to 83% with the addition of ublituximab. PFS also improved significantly in the ublituximab group, with an even greater improvement when the analysis was limited to those with del(17p) or TP53 aberrancy, but this outcome was limited by the reduced sample size of the study as well as the relatively short PFS of the ibrutinib arm.

After a median follow-up of 41.6 months, the median IRC-assessed PFS in all treated patients was not reached in the ublituximab plus ibrutinib group after 15 PFS events but was 35.9 months in the ibrutinib group after 25 PFS events (hazard ratio, 0.46; 95% confidence interval, 0.24-0.87; P = .016).

Undetectable minimal residual disease was also seen in 42% of the combination arm, compared with 6% of the ibrutinib arm.
 

What types of adverse events were found in the trial?

The researchers found mostly mild and known side effects of ibrutinib. More atrial fibrillation and neutropenia were seen in the antibody group, but this was not marked.

Most adverse events were of grade 1 or 2. The most common grade 3 and 4 adverse events were neutropenia (11 [19%] patients in the ublituximab plus ibrutinib group and 7 [12%] in the ibrutinib group), anemia (5 [8%] and 5 [9%], respectively), and diarrhea (6 [10%] and 3 [5%], respectively).
 

What about serious adverse events?

Hospitalization from infection was seen, as expected. There were two cardiac arrests and an unexplained death, across both arms, which was concerning, given the known association of ibrutinib with ventricular arrhythmia and sudden death. There were also several hemorrhages, including one fatal one, which was again consistent with the known side effects of ibrutinib.

Are there treatments comparable with ublituximab plus ibrutinib that clinicians should perhaps first consider using?

In terms of other anti-CD20 antibodies, we have two randomized trials that have failed to show a benefit from adding rituximab to ibrutinib.

Obinutuzumab, like ublituximab, is also a next-generation glycoengineered antibody, and it is reasonably likely that it might lead to similar results. However, the only data we have on ibrutinib with obinutuzumab are from a single arm in a more heterogeneous, lower-risk patient population, and it is unlikely that a randomized comparison will ever be done.
 

On the basis of these trial results, how would you use the combination of ublituximab and ibrutinib for your patients?

I would consider the addition of ublituximab to a BTK inhibitor in high-risk patients (once ublituximab is approved). I already usually use a next-generation BTK inhibitor rather than ibrutinib.

Are there any other implications of the GENUINE trial?

I think this trial underscores the importance of studying genetic subgroups of patients separately. In this case, that was done in high-risk patients, but this observation likely also applies to low-risk patients.

Most trials to date have enrolled unselected patient populations, often without stratification, and their results therefore tend to obscure the outcomes in both the very high risk (as studied here) and in the low risk (patients with immunoglobulin heavy chain variable region gene mutations).

Dr. Brown has served as a consultant for AbbVie, Acerta/AstraZeneca, Beigene, Bristol-Myers Squibb/Juno/Celgene, Catapult, Genentech/Roche, Janssen, MEI Pharma, Morphosys, and Novartis, and has received research funding from Gilead, Loxo/Lilly, TG Therapeutics, Verastem/SecuraBio.

A version of this article first appeared on Medscape.com.