AML

Six of eight relapsed/refractory acute myeloid leukemia patients, and one patient with accelerated phase chronic myelogenous leukemia, had no sign of residual disease 4 weeks after receiving compound CAR T therapy targeting both CD33 and CLL1.

Six patients moved on to subsequent hematopoietic stem cell transplantation (HSCT); the seventh responder withdrew from the study for personal reasons, according to a report at the virtual annual congress of the European Hematology Association.

Much work remains, but the initial results suggest that “CLL1-CD33 compound CAR T cell therapy could be developed as a bridge to transplant, a supplement to chemotherapy, or a standalone therapy for patients with acute myeloid leukemia” and other myeloid malignancies. The approach might also allow for reduced intensity conditioning or nonmyeloablative conditioning for HSCT, said lead investigator Fang Liu, MD, PhD, of the department of hematology at the Chengdu Military General Hospital, in Sichuan province, China.

It’s “a topic that will interest a lot of us.” For the first time, “a compound CAR with two independent CAR units induced remissions in AML,” said Pieter Sonneveld, MD, PhD, of the Erasmus Medical Center Cancer Institute, Rotterdam, the Netherlands, who introduced Dr. Liu’s presentation.

Chimeric antigen receptor (CAR) T cell therapy works well for B-cell malignancies, but translation to AML is “yet to be accomplished.” Meanwhile, despite progress against AML, about one-third of patients still relapse, “and prognosis for relapsed or refractory AML is dismal,” Dr. Liu and her team said.

CAR T is generally aimed against a single target, but AML bears heterogeneous cells that offset killing by single target therapies, resulting in disease relapse.

That problem suggested targeting multiple antigens simultaneously. CLL1 is an “ideal target,” Dr. Liu said, because the myeloid lineage antigen is highly expressed in AML, but absent in normal hematopoietic stem cells. CD33, meanwhile, is expressed on bulk AML cells in the majority of patients.

The CAR T cells were manufactured from autologous cells in eight of the subjects, and from a human leukocyte antigen-matched sibling donor cells for the ninth. The patients were lymphodepleted with fludarabine and cyclophosphamide, then infused with the therapeutic cells by a dose escalation at approximately 1-3 x 10⁶/kg in a single or split dose.

On disease reevaluation within 4 weeks, seven of nine patients – all with relapsed or refractory disease after multiple conventional treatments – were minimal residual disease negative by flow cytometry. The other two had no response, one of whom was CD33 positive but CLL1 negative, “indicating the importance of [the] CLL1 target in CAR T treatment,” the investigators said.

All nine patients developed grade 4 pancytopenia; eight had cytokine release syndrome (CRS), which was grade 3 in two; and four subjects developed neurotoxicity, which was grade 3 in three.

Five subjects had mild liver enzyme elevations; four had a coagulation disorder; four developed diarrhea; three developed sepsis; two fungal infections; and three pneumonia. One subject had a skin rash and one developed renal insufficiency.

The adverse events resolved after treatment. “Early intervention with steroids had a positive effect on the reduction of CRS and neurotoxicity,” the team noted.

Of the six patients who went on to HCST, one had standard myeloablative conditioning, but the rest had reduced intensity conditioning. Five subjects successfully engrafted with persistent full chimerism, but one died of sepsis before engraftment.

The median age was 32 years. The median bone marrow blast count before treatment was 47%. Seven subjects had de novo AML; one – a 6-year-old girl – had juvenile myelomonocytic leukemia that transformed into AML; and one had accelerated phase chronic myelogenous leukemia.

A phase 1 trial is underway (NCT03795779).

The work was funded by iCell Gene Therapeutics. Several investigators were employees. Dr. Liu didn’t report any disclosures.

[email protected]

SOURCE: Liu F et al. EHA Congress. Abstract S149.

Six of eight relapsed/refractory acute myeloid leukemia patients, and one patient with accelerated phase chronic myelogenous leukemia, had no sign of residual disease 4 weeks after receiving compound CAR T therapy targeting both CD33 and CLL1.

Six patients moved on to subsequent hematopoietic stem cell transplantation (HSCT); the seventh responder withdrew from the study for personal reasons, according to a report at the virtual annual congress of the European Hematology Association.

Much work remains, but the initial results suggest that “CLL1-CD33 compound CAR T cell therapy could be developed as a bridge to transplant, a supplement to chemotherapy, or a standalone therapy for patients with acute myeloid leukemia” and other myeloid malignancies. The approach might also allow for reduced intensity conditioning or nonmyeloablative conditioning for HSCT, said lead investigator Fang Liu, MD, PhD, of the department of hematology at the Chengdu Military General Hospital, in Sichuan province, China.

It’s “a topic that will interest a lot of us.” For the first time, “a compound CAR with two independent CAR units induced remissions in AML,” said Pieter Sonneveld, MD, PhD, of the Erasmus Medical Center Cancer Institute, Rotterdam, the Netherlands, who introduced Dr. Liu’s presentation.

Chimeric antigen receptor (CAR) T cell therapy works well for B-cell malignancies, but translation to AML is “yet to be accomplished.” Meanwhile, despite progress against AML, about one-third of patients still relapse, “and prognosis for relapsed or refractory AML is dismal,” Dr. Liu and her team said.

CAR T is generally aimed against a single target, but AML bears heterogeneous cells that offset killing by single target therapies, resulting in disease relapse.

That problem suggested targeting multiple antigens simultaneously. CLL1 is an “ideal target,” Dr. Liu said, because the myeloid lineage antigen is highly expressed in AML, but absent in normal hematopoietic stem cells. CD33, meanwhile, is expressed on bulk AML cells in the majority of patients.

The CAR T cells were manufactured from autologous cells in eight of the subjects, and from a human leukocyte antigen-matched sibling donor cells for the ninth. The patients were lymphodepleted with fludarabine and cyclophosphamide, then infused with the therapeutic cells by a dose escalation at approximately 1-3 x 10⁶/kg in a single or split dose.

On disease reevaluation within 4 weeks, seven of nine patients – all with relapsed or refractory disease after multiple conventional treatments – were minimal residual disease negative by flow cytometry. The other two had no response, one of whom was CD33 positive but CLL1 negative, “indicating the importance of [the] CLL1 target in CAR T treatment,” the investigators said.

All nine patients developed grade 4 pancytopenia; eight had cytokine release syndrome (CRS), which was grade 3 in two; and four subjects developed neurotoxicity, which was grade 3 in three.

Five subjects had mild liver enzyme elevations; four had a coagulation disorder; four developed diarrhea; three developed sepsis; two fungal infections; and three pneumonia. One subject had a skin rash and one developed renal insufficiency.

The adverse events resolved after treatment. “Early intervention with steroids had a positive effect on the reduction of CRS and neurotoxicity,” the team noted.

Of the six patients who went on to HCST, one had standard myeloablative conditioning, but the rest had reduced intensity conditioning. Five subjects successfully engrafted with persistent full chimerism, but one died of sepsis before engraftment.

The median age was 32 years. The median bone marrow blast count before treatment was 47%. Seven subjects had de novo AML; one – a 6-year-old girl – had juvenile myelomonocytic leukemia that transformed into AML; and one had accelerated phase chronic myelogenous leukemia.

A phase 1 trial is underway (NCT03795779).

The work was funded by iCell Gene Therapeutics. Several investigators were employees. Dr. Liu didn’t report any disclosures.

[email protected]

SOURCE: Liu F et al. EHA Congress. Abstract S149.

Six of eight relapsed/refractory acute myeloid leukemia patients, and one patient with accelerated phase chronic myelogenous leukemia, had no sign of residual disease 4 weeks after receiving compound CAR T therapy targeting both CD33 and CLL1.

Six patients moved on to subsequent hematopoietic stem cell transplantation (HSCT); the seventh responder withdrew from the study for personal reasons, according to a report at the virtual annual congress of the European Hematology Association.

Much work remains, but the initial results suggest that “CLL1-CD33 compound CAR T cell therapy could be developed as a bridge to transplant, a supplement to chemotherapy, or a standalone therapy for patients with acute myeloid leukemia” and other myeloid malignancies. The approach might also allow for reduced intensity conditioning or nonmyeloablative conditioning for HSCT, said lead investigator Fang Liu, MD, PhD, of the department of hematology at the Chengdu Military General Hospital, in Sichuan province, China.

It’s “a topic that will interest a lot of us.” For the first time, “a compound CAR with two independent CAR units induced remissions in AML,” said Pieter Sonneveld, MD, PhD, of the Erasmus Medical Center Cancer Institute, Rotterdam, the Netherlands, who introduced Dr. Liu’s presentation.

Chimeric antigen receptor (CAR) T cell therapy works well for B-cell malignancies, but translation to AML is “yet to be accomplished.” Meanwhile, despite progress against AML, about one-third of patients still relapse, “and prognosis for relapsed or refractory AML is dismal,” Dr. Liu and her team said.

CAR T is generally aimed against a single target, but AML bears heterogeneous cells that offset killing by single target therapies, resulting in disease relapse.

That problem suggested targeting multiple antigens simultaneously. CLL1 is an “ideal target,” Dr. Liu said, because the myeloid lineage antigen is highly expressed in AML, but absent in normal hematopoietic stem cells. CD33, meanwhile, is expressed on bulk AML cells in the majority of patients.

The CAR T cells were manufactured from autologous cells in eight of the subjects, and from a human leukocyte antigen-matched sibling donor cells for the ninth. The patients were lymphodepleted with fludarabine and cyclophosphamide, then infused with the therapeutic cells by a dose escalation at approximately 1-3 x 10⁶/kg in a single or split dose.

On disease reevaluation within 4 weeks, seven of nine patients – all with relapsed or refractory disease after multiple conventional treatments – were minimal residual disease negative by flow cytometry. The other two had no response, one of whom was CD33 positive but CLL1 negative, “indicating the importance of [the] CLL1 target in CAR T treatment,” the investigators said.

All nine patients developed grade 4 pancytopenia; eight had cytokine release syndrome (CRS), which was grade 3 in two; and four subjects developed neurotoxicity, which was grade 3 in three.

Five subjects had mild liver enzyme elevations; four had a coagulation disorder; four developed diarrhea; three developed sepsis; two fungal infections; and three pneumonia. One subject had a skin rash and one developed renal insufficiency.

The adverse events resolved after treatment. “Early intervention with steroids had a positive effect on the reduction of CRS and neurotoxicity,” the team noted.

Of the six patients who went on to HCST, one had standard myeloablative conditioning, but the rest had reduced intensity conditioning. Five subjects successfully engrafted with persistent full chimerism, but one died of sepsis before engraftment.

The median age was 32 years. The median bone marrow blast count before treatment was 47%. Seven subjects had de novo AML; one – a 6-year-old girl – had juvenile myelomonocytic leukemia that transformed into AML; and one had accelerated phase chronic myelogenous leukemia.

A phase 1 trial is underway (NCT03795779).

The work was funded by iCell Gene Therapeutics. Several investigators were employees. Dr. Liu didn’t report any disclosures.

[email protected]

SOURCE: Liu F et al. EHA Congress. Abstract S149.

A disease risk index is now available for pediatric patients with acute myeloid leukemia or acute lymphoblastic leukemia who undergo allogeneic hematopoietic stem cell transplantation.

The model, which was developed and validated using data from more than 2,000 patients, stratifies probabilities of leukemia-free survival (LFS) into four risk groups for acute myeloid leukemia (AML) and three risk groups for acute lymphoblastic leukemia (ALL), reported lead author Muna Qayed, MD, of Emory University, Atlanta, who presented findings as part of the American Society of Clinical Oncology virtual scientific program.

“The outcome of stem cell transplantation for hematologic malignancy is influenced by disease type, cytogenetics, and disease status at transplantation,” Dr. Qayed said. “In adults, these attributes were used to develop the disease risk index, or DRI, that can stratify patients for overall survival for purposes such as prognostication or clinical trial entry.”

But no such model exists for pediatric patients, Dr. Qayed said, noting that the adult DRI was found to be inaccurate when applied to children.

“[T]he [adult] DRI did not differentiate [pediatric] patients by overall survival,” Dr. Qayed said. “Therefore, knowing that pediatric AML and ALL differ biologically from adult leukemia, and further, treatment strategies differ between adults and children, we aimed to develop a pediatric-specific DRI.”

This involved analysis of data from 1,135 children with AML and 1,228 children with ALL who underwent transplantation between 2008 and 2017. All patients had myeloablative conditioning, and 75% received an unrelated donor graft. Haploidentical transplants were excluded because of small sample size.

Analyses were conducted in AML and ALL cohorts, with patients in each population randomized to training and validation subgroups in a 1:1 ratio. The primary outcome was LFS. Cox regression models were used to identify significant characteristics, which were then integrated into a prognostic scoring system for the training groups. These scoring systems were then tested in the validation subgroups. Maximum likelihood was used to identify age cutoffs, which were 3 years for AML and 2 years for ALL.

In both cohorts, disease status at transplantation was characterized by complete remission and minimal residual disease status.

In the AML cohort, approximately one-third of patients were in first complete remission with negative minimal residual disease. Risk was stratified into four groups, including good, intermediate, high, and very high risk, with respective 5-year LFS probabilities of 81%, 56%, 44%, and 21%. Independent predictors of poorer outcome included unfavorable cytogenetics, first or second complete remission with minimal residual disease positivity, relapse at transplantation, and age less than 3 years.

In the ALL cohort, risk was stratified into three risk tiers: good, intermediate, and high, with 5-year LFS probabilities of 68%, 50%, and 15%, respectively. Independent predictors of poorer outcome included age less than 2 years, relapse at transplantation, and second complete remission regardless of minimal residual disease status.

The models for each disease also predicted overall survival.

For AML, hazard ratios, ascending from good to very-high-risk tiers, were 1.00, 3.52, 4.67, and 8.62. For ALL risk tiers, ascending hazard ratios were 1.00, 2.16, and 3.86.

“In summary, the pediatric disease risk index validated for leukemia-free survival and overall survival successfully stratifies children with acute leukemia at the time of transplantation,” Dr. Qayed said.

She concluded her presentation by highlighting the practicality and relevance of the new scoring system.

“The components included in the scoring system used information that is readily available pretransplantation, lending support to the deliverability of the prognostic scoring system,” Dr. Qayed said. “It can further be used for improved interpretation of multicenter data and in clinical trials for risk stratification.”

In a virtual presentation, invited discussant Nirali N. Shah, MD, of the National Cancer Institute, Bethesda, Md., first emphasized the clinical importance of an accurate disease risk index for pediatric patients.

“When going into transplant, the No. 1 question that all parents will ask is: ‘Will my child be cured?’ ” she said.

According to Dr. Shah, the risk model developed by Dr. Qayed and colleagues is built on a strong foundation, including adequate sample size, comprehensive disease characterization, exclusion of patients that did not undergo myeloablative conditioning, and use of minimal residual disease status.

Still, more work is needed, Dr. Shah said.

“This DRI will need to be prospectively tested and compared to other established risk factors. For instance, minimal residual disease alone can be further stratified and has a significant role in establishing risk for posttransplant relapse. And the development of acute graft-versus-host disease also plays an important role in posttransplant relapse.”

Dr. Shah went on to outline potential areas of improvement.

“[F]uture directions for this study could include incorporation of early posttransplant events like graft-versus-host disease, potential stratification of the minimal residual disease results among those patients in complete remission, and potential application of this DRI to the adolescent and young adult population, which may have slight variation even from the adult DRI.”The study was funded by the National Institutes of Health. The investigators disclosed no conflicts of interest

SOURCE: Qayed M et al. ASCO 2020, Abstract 7503.

A disease risk index is now available for pediatric patients with acute myeloid leukemia or acute lymphoblastic leukemia who undergo allogeneic hematopoietic stem cell transplantation.

The model, which was developed and validated using data from more than 2,000 patients, stratifies probabilities of leukemia-free survival (LFS) into four risk groups for acute myeloid leukemia (AML) and three risk groups for acute lymphoblastic leukemia (ALL), reported lead author Muna Qayed, MD, of Emory University, Atlanta, who presented findings as part of the American Society of Clinical Oncology virtual scientific program.

“The outcome of stem cell transplantation for hematologic malignancy is influenced by disease type, cytogenetics, and disease status at transplantation,” Dr. Qayed said. “In adults, these attributes were used to develop the disease risk index, or DRI, that can stratify patients for overall survival for purposes such as prognostication or clinical trial entry.”

But no such model exists for pediatric patients, Dr. Qayed said, noting that the adult DRI was found to be inaccurate when applied to children.

“[T]he [adult] DRI did not differentiate [pediatric] patients by overall survival,” Dr. Qayed said. “Therefore, knowing that pediatric AML and ALL differ biologically from adult leukemia, and further, treatment strategies differ between adults and children, we aimed to develop a pediatric-specific DRI.”

This involved analysis of data from 1,135 children with AML and 1,228 children with ALL who underwent transplantation between 2008 and 2017. All patients had myeloablative conditioning, and 75% received an unrelated donor graft. Haploidentical transplants were excluded because of small sample size.

Analyses were conducted in AML and ALL cohorts, with patients in each population randomized to training and validation subgroups in a 1:1 ratio. The primary outcome was LFS. Cox regression models were used to identify significant characteristics, which were then integrated into a prognostic scoring system for the training groups. These scoring systems were then tested in the validation subgroups. Maximum likelihood was used to identify age cutoffs, which were 3 years for AML and 2 years for ALL.

In both cohorts, disease status at transplantation was characterized by complete remission and minimal residual disease status.

In the AML cohort, approximately one-third of patients were in first complete remission with negative minimal residual disease. Risk was stratified into four groups, including good, intermediate, high, and very high risk, with respective 5-year LFS probabilities of 81%, 56%, 44%, and 21%. Independent predictors of poorer outcome included unfavorable cytogenetics, first or second complete remission with minimal residual disease positivity, relapse at transplantation, and age less than 3 years.

In the ALL cohort, risk was stratified into three risk tiers: good, intermediate, and high, with 5-year LFS probabilities of 68%, 50%, and 15%, respectively. Independent predictors of poorer outcome included age less than 2 years, relapse at transplantation, and second complete remission regardless of minimal residual disease status.

The models for each disease also predicted overall survival.

For AML, hazard ratios, ascending from good to very-high-risk tiers, were 1.00, 3.52, 4.67, and 8.62. For ALL risk tiers, ascending hazard ratios were 1.00, 2.16, and 3.86.

“In summary, the pediatric disease risk index validated for leukemia-free survival and overall survival successfully stratifies children with acute leukemia at the time of transplantation,” Dr. Qayed said.

She concluded her presentation by highlighting the practicality and relevance of the new scoring system.

“The components included in the scoring system used information that is readily available pretransplantation, lending support to the deliverability of the prognostic scoring system,” Dr. Qayed said. “It can further be used for improved interpretation of multicenter data and in clinical trials for risk stratification.”

In a virtual presentation, invited discussant Nirali N. Shah, MD, of the National Cancer Institute, Bethesda, Md., first emphasized the clinical importance of an accurate disease risk index for pediatric patients.

“When going into transplant, the No. 1 question that all parents will ask is: ‘Will my child be cured?’ ” she said.

According to Dr. Shah, the risk model developed by Dr. Qayed and colleagues is built on a strong foundation, including adequate sample size, comprehensive disease characterization, exclusion of patients that did not undergo myeloablative conditioning, and use of minimal residual disease status.

Still, more work is needed, Dr. Shah said.

“This DRI will need to be prospectively tested and compared to other established risk factors. For instance, minimal residual disease alone can be further stratified and has a significant role in establishing risk for posttransplant relapse. And the development of acute graft-versus-host disease also plays an important role in posttransplant relapse.”

Dr. Shah went on to outline potential areas of improvement.

“[F]uture directions for this study could include incorporation of early posttransplant events like graft-versus-host disease, potential stratification of the minimal residual disease results among those patients in complete remission, and potential application of this DRI to the adolescent and young adult population, which may have slight variation even from the adult DRI.”The study was funded by the National Institutes of Health. The investigators disclosed no conflicts of interest

SOURCE: Qayed M et al. ASCO 2020, Abstract 7503.

A disease risk index is now available for pediatric patients with acute myeloid leukemia or acute lymphoblastic leukemia who undergo allogeneic hematopoietic stem cell transplantation.

The model, which was developed and validated using data from more than 2,000 patients, stratifies probabilities of leukemia-free survival (LFS) into four risk groups for acute myeloid leukemia (AML) and three risk groups for acute lymphoblastic leukemia (ALL), reported lead author Muna Qayed, MD, of Emory University, Atlanta, who presented findings as part of the American Society of Clinical Oncology virtual scientific program.

“The outcome of stem cell transplantation for hematologic malignancy is influenced by disease type, cytogenetics, and disease status at transplantation,” Dr. Qayed said. “In adults, these attributes were used to develop the disease risk index, or DRI, that can stratify patients for overall survival for purposes such as prognostication or clinical trial entry.”

But no such model exists for pediatric patients, Dr. Qayed said, noting that the adult DRI was found to be inaccurate when applied to children.

“[T]he [adult] DRI did not differentiate [pediatric] patients by overall survival,” Dr. Qayed said. “Therefore, knowing that pediatric AML and ALL differ biologically from adult leukemia, and further, treatment strategies differ between adults and children, we aimed to develop a pediatric-specific DRI.”

This involved analysis of data from 1,135 children with AML and 1,228 children with ALL who underwent transplantation between 2008 and 2017. All patients had myeloablative conditioning, and 75% received an unrelated donor graft. Haploidentical transplants were excluded because of small sample size.

Analyses were conducted in AML and ALL cohorts, with patients in each population randomized to training and validation subgroups in a 1:1 ratio. The primary outcome was LFS. Cox regression models were used to identify significant characteristics, which were then integrated into a prognostic scoring system for the training groups. These scoring systems were then tested in the validation subgroups. Maximum likelihood was used to identify age cutoffs, which were 3 years for AML and 2 years for ALL.

In both cohorts, disease status at transplantation was characterized by complete remission and minimal residual disease status.

In the AML cohort, approximately one-third of patients were in first complete remission with negative minimal residual disease. Risk was stratified into four groups, including good, intermediate, high, and very high risk, with respective 5-year LFS probabilities of 81%, 56%, 44%, and 21%. Independent predictors of poorer outcome included unfavorable cytogenetics, first or second complete remission with minimal residual disease positivity, relapse at transplantation, and age less than 3 years.

In the ALL cohort, risk was stratified into three risk tiers: good, intermediate, and high, with 5-year LFS probabilities of 68%, 50%, and 15%, respectively. Independent predictors of poorer outcome included age less than 2 years, relapse at transplantation, and second complete remission regardless of minimal residual disease status.

The models for each disease also predicted overall survival.

For AML, hazard ratios, ascending from good to very-high-risk tiers, were 1.00, 3.52, 4.67, and 8.62. For ALL risk tiers, ascending hazard ratios were 1.00, 2.16, and 3.86.

“In summary, the pediatric disease risk index validated for leukemia-free survival and overall survival successfully stratifies children with acute leukemia at the time of transplantation,” Dr. Qayed said.

She concluded her presentation by highlighting the practicality and relevance of the new scoring system.

“The components included in the scoring system used information that is readily available pretransplantation, lending support to the deliverability of the prognostic scoring system,” Dr. Qayed said. “It can further be used for improved interpretation of multicenter data and in clinical trials for risk stratification.”

In a virtual presentation, invited discussant Nirali N. Shah, MD, of the National Cancer Institute, Bethesda, Md., first emphasized the clinical importance of an accurate disease risk index for pediatric patients.

“When going into transplant, the No. 1 question that all parents will ask is: ‘Will my child be cured?’ ” she said.

According to Dr. Shah, the risk model developed by Dr. Qayed and colleagues is built on a strong foundation, including adequate sample size, comprehensive disease characterization, exclusion of patients that did not undergo myeloablative conditioning, and use of minimal residual disease status.

Still, more work is needed, Dr. Shah said.

“This DRI will need to be prospectively tested and compared to other established risk factors. For instance, minimal residual disease alone can be further stratified and has a significant role in establishing risk for posttransplant relapse. And the development of acute graft-versus-host disease also plays an important role in posttransplant relapse.”

Dr. Shah went on to outline potential areas of improvement.

“[F]uture directions for this study could include incorporation of early posttransplant events like graft-versus-host disease, potential stratification of the minimal residual disease results among those patients in complete remission, and potential application of this DRI to the adolescent and young adult population, which may have slight variation even from the adult DRI.”The study was funded by the National Institutes of Health. The investigators disclosed no conflicts of interest

SOURCE: Qayed M et al. ASCO 2020, Abstract 7503.

CD123, a membrane-bound interleukin-3 receptor, is overexpressed in many hematological malignancies, and it has been found useful in characterizing both acute myeloid leukemia (AML) and B-acute lymphoblastic leukemia (B-ALL). CD123 expression also appears positively correlated with the presence of minimal residual disease (MRD) after treatment, and may be useful as a marker of treatment success, according to a report presented online in Clinical Lymphoma, Myeloma and Leukemia.

Nupur Das, MD, and colleagues from the Dr B.R. Ambedkar Institute Rotary Cancer Hospital, New Delhi, India, evaluated the pattern of CD123 expression across different subtypes of acute leukemia to assess its utility as a diagnostic marker, and to assess its impact on MRD assessment and early treatment outcome.

The evaluated the expression of CD123 in 757 samples of acute leukemia (479 treatment-naive and 278 follow-up samples) and compared the results with post-induction morphological remission (CR) and measurable residual disease (MRD) status.

The researchers used cut-offs of 5%, 10%, and 20% CD123-expression positive results to define a case as CD123 positive. On this basis, expression of CD123 was observed in 75.6%, 66.2%. and 50% of AML samples and 88.6%, 81.8%, and 75% of B-ALL samples respectively. They also found that none of the 12 T cell acute lymphoblastic leukemia (T-ALL) cases expressed CD123.

In addition, they found that CD123 expression was associated with MRD-positive status in both B-ALL (P < .001) and AML (P = .001).

“MRD is already an established post-treatment prognostication tool in acute leukemia and hence, the positive correlation of CD123 expression with MRD positivity in AML signifies its utility as an important marker to assess early response to therapy,” the researchers stated.

The authors reported that they had no conflicts of interest.
 

[email protected]

SOURCE: Das N et al. Clin Lymphoma Myeloma Leuk. 2020 May 10; doi.org/10.1016/j.clml.2020.05.004.

CD123, a membrane-bound interleukin-3 receptor, is overexpressed in many hematological malignancies, and it has been found useful in characterizing both acute myeloid leukemia (AML) and B-acute lymphoblastic leukemia (B-ALL). CD123 expression also appears positively correlated with the presence of minimal residual disease (MRD) after treatment, and may be useful as a marker of treatment success, according to a report presented online in Clinical Lymphoma, Myeloma and Leukemia.

Nupur Das, MD, and colleagues from the Dr B.R. Ambedkar Institute Rotary Cancer Hospital, New Delhi, India, evaluated the pattern of CD123 expression across different subtypes of acute leukemia to assess its utility as a diagnostic marker, and to assess its impact on MRD assessment and early treatment outcome.

The evaluated the expression of CD123 in 757 samples of acute leukemia (479 treatment-naive and 278 follow-up samples) and compared the results with post-induction morphological remission (CR) and measurable residual disease (MRD) status.

The researchers used cut-offs of 5%, 10%, and 20% CD123-expression positive results to define a case as CD123 positive. On this basis, expression of CD123 was observed in 75.6%, 66.2%. and 50% of AML samples and 88.6%, 81.8%, and 75% of B-ALL samples respectively. They also found that none of the 12 T cell acute lymphoblastic leukemia (T-ALL) cases expressed CD123.

In addition, they found that CD123 expression was associated with MRD-positive status in both B-ALL (P < .001) and AML (P = .001).

“MRD is already an established post-treatment prognostication tool in acute leukemia and hence, the positive correlation of CD123 expression with MRD positivity in AML signifies its utility as an important marker to assess early response to therapy,” the researchers stated.

The authors reported that they had no conflicts of interest.
 

[email protected]

SOURCE: Das N et al. Clin Lymphoma Myeloma Leuk. 2020 May 10; doi.org/10.1016/j.clml.2020.05.004.

CD123, a membrane-bound interleukin-3 receptor, is overexpressed in many hematological malignancies, and it has been found useful in characterizing both acute myeloid leukemia (AML) and B-acute lymphoblastic leukemia (B-ALL). CD123 expression also appears positively correlated with the presence of minimal residual disease (MRD) after treatment, and may be useful as a marker of treatment success, according to a report presented online in Clinical Lymphoma, Myeloma and Leukemia.

Nupur Das, MD, and colleagues from the Dr B.R. Ambedkar Institute Rotary Cancer Hospital, New Delhi, India, evaluated the pattern of CD123 expression across different subtypes of acute leukemia to assess its utility as a diagnostic marker, and to assess its impact on MRD assessment and early treatment outcome.

The evaluated the expression of CD123 in 757 samples of acute leukemia (479 treatment-naive and 278 follow-up samples) and compared the results with post-induction morphological remission (CR) and measurable residual disease (MRD) status.

The researchers used cut-offs of 5%, 10%, and 20% CD123-expression positive results to define a case as CD123 positive. On this basis, expression of CD123 was observed in 75.6%, 66.2%. and 50% of AML samples and 88.6%, 81.8%, and 75% of B-ALL samples respectively. They also found that none of the 12 T cell acute lymphoblastic leukemia (T-ALL) cases expressed CD123.

In addition, they found that CD123 expression was associated with MRD-positive status in both B-ALL (P < .001) and AML (P = .001).

“MRD is already an established post-treatment prognostication tool in acute leukemia and hence, the positive correlation of CD123 expression with MRD positivity in AML signifies its utility as an important marker to assess early response to therapy,” the researchers stated.

The authors reported that they had no conflicts of interest.
 

[email protected]

SOURCE: Das N et al. Clin Lymphoma Myeloma Leuk. 2020 May 10; doi.org/10.1016/j.clml.2020.05.004.

A hematologist in Italy shared his personal experience addressing the intersection of COVID-19 and the care of acute myeloid leukemia (AML) patients during a webinar hosted by the European Hematology Association (EHA).

National Institutes of Health/Wikimedia Commons/Public Domain

Felicetto Ferrara, MD, of Cardarelli Hospital in Naples, Italy, discussed the main difficulties in administering optimal treatment for AML patients who become infected with SARS-CoV-2.

The major problems include the need to isolate patients while simultaneously allowing for collaboration with pulmonologists and intensivists, the delays in AML treatment caused by COVID-19, and the risk of drug-drug interactions while treating AML patients with COVID-19.

The need to isolate AML patients with COVID-19 is paramount, according to Dr. Ferrara. Isolation can be accomplished, ideally, by the creation of a dedicated COVID-19 unit or, alternatively, with the use of single-patient negative pressure rooms. Dr. Ferrara stressed that all patients with AML should be tested for COVID-19 before admission.
 

Delaying or reducing AML treatment

Treatment delays are of particular concern, according to Dr. Ferrara, and some patients may require dose reductions, especially for AML treatments that might have a detrimental effect on the immune system.

Decisions must be made as to whether planned approaches to induction or consolidation therapy should be changed, and special concern has to be paid to elderly AML patients, who have the highest risks of bad COVID-19 outcomes.

Specific attention should be paid to patients with acute promyelocytic leukemia as well, according to Dr. Ferrara. These patients are of concern in the COVID-19 era because of their risk of differentiation syndrome, which can induce respiratory distress.

In all cases, autologous or allogeneic stem cell transplant should be deferred until confirmed COVID-19–negative test results are obtained.
 

Continuing AML treatment

Of particular concern is the fact that, without a standard therapy for COVID-19, many different drugs might be used in treatment efforts. This raises the potential for serious drug-drug interactions with the patient’s AML medications, so close attention should be paid to an individual patient’s medications.

In terms of continuing AML treatment for younger adults (less than 65 years) who are positive for COVID-19, symptomatic and asymptomatic patients should be treated differently, Dr. Ferarra said.

Symptomatic patients should be given hydroxyurea until symptom resolution, and unless urgent, any further AML treatments should be delayed. However, if treatment is needed immediately, it should be given in a COVID-19–dedicated unit.

The restrictions are much looser for young adult asymptomatic COVID-19 patients with AML. Standard induction therapy should be given, with intermediate-dose cytarabine used as consolidation therapy.

Therapy in elderly patients with AML and COVID-19 should be based on symptom status as well, said Dr. Ferrara.

Asymptomatic but otherwise fit elderly patients should have standard induction therapy if they are in the European Leukemia Network favorable genetic subgroup. Asymptomatic elderly patients with high-risk molecular disease can receive venetoclax with a hypomethylating agent.

Symptomatic elderly patients should continue with hydroxyurea until symptom resolution, and any other treatments should be delayed in nonemergency cases.

Relapsed AML patients with COVID-19 should have their treatments postponed until they obtain negative COVID-19 test results whenever possible, Dr. Ferarra said. However, if treatment is necessary, molecularly targeted therapies (gilteritinib, ivosidenib, and enasidenib) are preferable to high-dose chemotherapy.

In all cases, treatment decisions should be made in conjunction with pulmonologists and intensivists, Dr. Ferrera noted.

Webinar moderator Francesco Cerisoli, MD, head of research and mentoring at EHA, highlighted the fact that EHA has published specific recommendations for treating AML patients during the COVID-19 pandemic. The majority of these were discussed by and are aligned with the recommendations presented by Dr. Ferrara.

The EHA webinar contains a disclaimer that the content discussed was based on the personal experiences and opinions of the speakers and that no general, evidence-based guidance could be derived from the discussion. There were no disclosures given.

[email protected]

A hematologist in Italy shared his personal experience addressing the intersection of COVID-19 and the care of acute myeloid leukemia (AML) patients during a webinar hosted by the European Hematology Association (EHA).

National Institutes of Health/Wikimedia Commons/Public Domain

Felicetto Ferrara, MD, of Cardarelli Hospital in Naples, Italy, discussed the main difficulties in administering optimal treatment for AML patients who become infected with SARS-CoV-2.

The major problems include the need to isolate patients while simultaneously allowing for collaboration with pulmonologists and intensivists, the delays in AML treatment caused by COVID-19, and the risk of drug-drug interactions while treating AML patients with COVID-19.

The need to isolate AML patients with COVID-19 is paramount, according to Dr. Ferrara. Isolation can be accomplished, ideally, by the creation of a dedicated COVID-19 unit or, alternatively, with the use of single-patient negative pressure rooms. Dr. Ferrara stressed that all patients with AML should be tested for COVID-19 before admission.
 

Delaying or reducing AML treatment

Treatment delays are of particular concern, according to Dr. Ferrara, and some patients may require dose reductions, especially for AML treatments that might have a detrimental effect on the immune system.

Decisions must be made as to whether planned approaches to induction or consolidation therapy should be changed, and special concern has to be paid to elderly AML patients, who have the highest risks of bad COVID-19 outcomes.

Specific attention should be paid to patients with acute promyelocytic leukemia as well, according to Dr. Ferrara. These patients are of concern in the COVID-19 era because of their risk of differentiation syndrome, which can induce respiratory distress.

In all cases, autologous or allogeneic stem cell transplant should be deferred until confirmed COVID-19–negative test results are obtained.
 

Continuing AML treatment

Of particular concern is the fact that, without a standard therapy for COVID-19, many different drugs might be used in treatment efforts. This raises the potential for serious drug-drug interactions with the patient’s AML medications, so close attention should be paid to an individual patient’s medications.

In terms of continuing AML treatment for younger adults (less than 65 years) who are positive for COVID-19, symptomatic and asymptomatic patients should be treated differently, Dr. Ferarra said.

Symptomatic patients should be given hydroxyurea until symptom resolution, and unless urgent, any further AML treatments should be delayed. However, if treatment is needed immediately, it should be given in a COVID-19–dedicated unit.

The restrictions are much looser for young adult asymptomatic COVID-19 patients with AML. Standard induction therapy should be given, with intermediate-dose cytarabine used as consolidation therapy.

Therapy in elderly patients with AML and COVID-19 should be based on symptom status as well, said Dr. Ferrara.

Asymptomatic but otherwise fit elderly patients should have standard induction therapy if they are in the European Leukemia Network favorable genetic subgroup. Asymptomatic elderly patients with high-risk molecular disease can receive venetoclax with a hypomethylating agent.

Symptomatic elderly patients should continue with hydroxyurea until symptom resolution, and any other treatments should be delayed in nonemergency cases.

Relapsed AML patients with COVID-19 should have their treatments postponed until they obtain negative COVID-19 test results whenever possible, Dr. Ferarra said. However, if treatment is necessary, molecularly targeted therapies (gilteritinib, ivosidenib, and enasidenib) are preferable to high-dose chemotherapy.

In all cases, treatment decisions should be made in conjunction with pulmonologists and intensivists, Dr. Ferrera noted.

Webinar moderator Francesco Cerisoli, MD, head of research and mentoring at EHA, highlighted the fact that EHA has published specific recommendations for treating AML patients during the COVID-19 pandemic. The majority of these were discussed by and are aligned with the recommendations presented by Dr. Ferrara.

The EHA webinar contains a disclaimer that the content discussed was based on the personal experiences and opinions of the speakers and that no general, evidence-based guidance could be derived from the discussion. There were no disclosures given.

[email protected]

A hematologist in Italy shared his personal experience addressing the intersection of COVID-19 and the care of acute myeloid leukemia (AML) patients during a webinar hosted by the European Hematology Association (EHA).

National Institutes of Health/Wikimedia Commons/Public Domain

Felicetto Ferrara, MD, of Cardarelli Hospital in Naples, Italy, discussed the main difficulties in administering optimal treatment for AML patients who become infected with SARS-CoV-2.

The major problems include the need to isolate patients while simultaneously allowing for collaboration with pulmonologists and intensivists, the delays in AML treatment caused by COVID-19, and the risk of drug-drug interactions while treating AML patients with COVID-19.

The need to isolate AML patients with COVID-19 is paramount, according to Dr. Ferrara. Isolation can be accomplished, ideally, by the creation of a dedicated COVID-19 unit or, alternatively, with the use of single-patient negative pressure rooms. Dr. Ferrara stressed that all patients with AML should be tested for COVID-19 before admission.
 

Delaying or reducing AML treatment

Treatment delays are of particular concern, according to Dr. Ferrara, and some patients may require dose reductions, especially for AML treatments that might have a detrimental effect on the immune system.

Decisions must be made as to whether planned approaches to induction or consolidation therapy should be changed, and special concern has to be paid to elderly AML patients, who have the highest risks of bad COVID-19 outcomes.

Specific attention should be paid to patients with acute promyelocytic leukemia as well, according to Dr. Ferrara. These patients are of concern in the COVID-19 era because of their risk of differentiation syndrome, which can induce respiratory distress.

In all cases, autologous or allogeneic stem cell transplant should be deferred until confirmed COVID-19–negative test results are obtained.
 

Continuing AML treatment

Of particular concern is the fact that, without a standard therapy for COVID-19, many different drugs might be used in treatment efforts. This raises the potential for serious drug-drug interactions with the patient’s AML medications, so close attention should be paid to an individual patient’s medications.

In terms of continuing AML treatment for younger adults (less than 65 years) who are positive for COVID-19, symptomatic and asymptomatic patients should be treated differently, Dr. Ferarra said.

Symptomatic patients should be given hydroxyurea until symptom resolution, and unless urgent, any further AML treatments should be delayed. However, if treatment is needed immediately, it should be given in a COVID-19–dedicated unit.

The restrictions are much looser for young adult asymptomatic COVID-19 patients with AML. Standard induction therapy should be given, with intermediate-dose cytarabine used as consolidation therapy.

Therapy in elderly patients with AML and COVID-19 should be based on symptom status as well, said Dr. Ferrara.

Asymptomatic but otherwise fit elderly patients should have standard induction therapy if they are in the European Leukemia Network favorable genetic subgroup. Asymptomatic elderly patients with high-risk molecular disease can receive venetoclax with a hypomethylating agent.

Symptomatic elderly patients should continue with hydroxyurea until symptom resolution, and any other treatments should be delayed in nonemergency cases.

Relapsed AML patients with COVID-19 should have their treatments postponed until they obtain negative COVID-19 test results whenever possible, Dr. Ferarra said. However, if treatment is necessary, molecularly targeted therapies (gilteritinib, ivosidenib, and enasidenib) are preferable to high-dose chemotherapy.

In all cases, treatment decisions should be made in conjunction with pulmonologists and intensivists, Dr. Ferrera noted.

Webinar moderator Francesco Cerisoli, MD, head of research and mentoring at EHA, highlighted the fact that EHA has published specific recommendations for treating AML patients during the COVID-19 pandemic. The majority of these were discussed by and are aligned with the recommendations presented by Dr. Ferrara.

The EHA webinar contains a disclaimer that the content discussed was based on the personal experiences and opinions of the speakers and that no general, evidence-based guidance could be derived from the discussion. There were no disclosures given.

[email protected]

A clofarabine-based treatment was found to be safe and effective in refractory/relapsed acute myeloid leukemia (AML) in the phase 2 CLAM trial.

The CLAM protocol treatment was clofarabine, cytarabine, and mitoxantrone (intravenous infusion, days 1‐5), cytarabine (intravenous infusion starting 4 hours after clofarabine, days 1‐5), and mitoxantrone (intravenous infusion, days 3‐5).

Bone marrow aspiration and trephine biopsy were performed on day 28. A total of 52 patients (16 women), with an age range of 22-65 years and refractory/relapsed AML were treated.

The overall response rate after the first cycle of CLAM was 90.4% (complete remission, 69.2%; CR with incomplete hematologic recovery, 21.2%). In addition, the efficacy of CLAM was not apparently affected by high‐risk karyotypes and genetic mutations among the patients.

Patients with a response (marrow < 5% blasts) received a maximum of two cycles of CLAM consolidation, each at 50% dose reduction, given 6‐8 weeks apart. Responding patients with an HLA‐matched sibling or volunteer‐unrelated donor were offered allogeneic hematopoietic stem cell transplantation (HSCT). Toxicity of CLAM was manageable and did not compromise subsequent allogeneic HSCT, the researchers added.

“In this era of molecular targeting, CLAM might still have a role to play,” according to the researchers. “It offers the advantage of a highly effective regimen that is readily available. It provides a median DOR of 5 months, which is meaningful for organization of HSCT. Delays associated with recruitment into clinical trials or sourcing of targeted drugs are obviated. Precious time is saved, so that patients can quickly be bridged to a potentially curative allogeneic HSCT.”

No disclosures or conflicts of interest were reported.

[email protected]

SOURCE: Gill H et al. Cancer Med. 2020 Mar 20. doi:10.1002/cam4.2865.

A clofarabine-based treatment was found to be safe and effective in refractory/relapsed acute myeloid leukemia (AML) in the phase 2 CLAM trial.

The CLAM protocol treatment was clofarabine, cytarabine, and mitoxantrone (intravenous infusion, days 1‐5), cytarabine (intravenous infusion starting 4 hours after clofarabine, days 1‐5), and mitoxantrone (intravenous infusion, days 3‐5).

Bone marrow aspiration and trephine biopsy were performed on day 28. A total of 52 patients (16 women), with an age range of 22-65 years and refractory/relapsed AML were treated.

The overall response rate after the first cycle of CLAM was 90.4% (complete remission, 69.2%; CR with incomplete hematologic recovery, 21.2%). In addition, the efficacy of CLAM was not apparently affected by high‐risk karyotypes and genetic mutations among the patients.

Patients with a response (marrow < 5% blasts) received a maximum of two cycles of CLAM consolidation, each at 50% dose reduction, given 6‐8 weeks apart. Responding patients with an HLA‐matched sibling or volunteer‐unrelated donor were offered allogeneic hematopoietic stem cell transplantation (HSCT). Toxicity of CLAM was manageable and did not compromise subsequent allogeneic HSCT, the researchers added.

“In this era of molecular targeting, CLAM might still have a role to play,” according to the researchers. “It offers the advantage of a highly effective regimen that is readily available. It provides a median DOR of 5 months, which is meaningful for organization of HSCT. Delays associated with recruitment into clinical trials or sourcing of targeted drugs are obviated. Precious time is saved, so that patients can quickly be bridged to a potentially curative allogeneic HSCT.”

No disclosures or conflicts of interest were reported.

[email protected]

SOURCE: Gill H et al. Cancer Med. 2020 Mar 20. doi:10.1002/cam4.2865.

A clofarabine-based treatment was found to be safe and effective in refractory/relapsed acute myeloid leukemia (AML) in the phase 2 CLAM trial.

The CLAM protocol treatment was clofarabine, cytarabine, and mitoxantrone (intravenous infusion, days 1‐5), cytarabine (intravenous infusion starting 4 hours after clofarabine, days 1‐5), and mitoxantrone (intravenous infusion, days 3‐5).

Bone marrow aspiration and trephine biopsy were performed on day 28. A total of 52 patients (16 women), with an age range of 22-65 years and refractory/relapsed AML were treated.

The overall response rate after the first cycle of CLAM was 90.4% (complete remission, 69.2%; CR with incomplete hematologic recovery, 21.2%). In addition, the efficacy of CLAM was not apparently affected by high‐risk karyotypes and genetic mutations among the patients.

Patients with a response (marrow < 5% blasts) received a maximum of two cycles of CLAM consolidation, each at 50% dose reduction, given 6‐8 weeks apart. Responding patients with an HLA‐matched sibling or volunteer‐unrelated donor were offered allogeneic hematopoietic stem cell transplantation (HSCT). Toxicity of CLAM was manageable and did not compromise subsequent allogeneic HSCT, the researchers added.

“In this era of molecular targeting, CLAM might still have a role to play,” according to the researchers. “It offers the advantage of a highly effective regimen that is readily available. It provides a median DOR of 5 months, which is meaningful for organization of HSCT. Delays associated with recruitment into clinical trials or sourcing of targeted drugs are obviated. Precious time is saved, so that patients can quickly be bridged to a potentially curative allogeneic HSCT.”

No disclosures or conflicts of interest were reported.

[email protected]

SOURCE: Gill H et al. Cancer Med. 2020 Mar 20. doi:10.1002/cam4.2865.

The SARS-CoV-2 pandemic poses significant risks to leukemia patients and their providers, impacting every aspect of care from diagnosis through therapy, according to an editorial letter published online in Leukemia Research.

VashiDonsk/Creative Commons/CC ASA 3.0

One key concern to be considered is the risk of missed or delayed diagnosis due to the pandemic conditions. An estimated 50%-75% of patients with acute leukemia are febrile at diagnosis and this puts them at high risk of a misdiagnosis of COVID-19 upon initial evaluation. As with other oncological conditions (primary mediastinal lymphoma or lung cancer, for example), which often present with a cough with or without fever, their symptoms “are likely to be considered trivial after a negative SARS-CoV-2 test,” with patients then being sent home without further assessment. In a rapidly progressing disease such as acute leukemia, this could lead to critical delays in therapeutic intervention.

The authors, from the Service and Central Laboratory of Hematology, Lausanne (Switzerland) University Hospital, also discussed the problems that might occur with regard to most standard forms of therapy. In particular, they addressed potential impacts of the pandemic on chemotherapy, bone marrow transplantation, maintenance treatments, supportive measures, and targeted therapies.

Of particular concern, “most patients may suffer from postponed chemotherapy, due to a shortage of isolation beds and blood products or the wish to avoid immunosuppressive treatments,” the authors noted, warning that “delay in chemotherapy initiation may negatively affect prognosis, [particularly in patients under age 60] with favorable- or intermediate-risk disease.”

With regard to stem cell transplantation, the authors detail the many potential difficulties with regard to procedures involving both donors and recipients, and warn that in some cases, delay in transplant could result in the reappearance of a significant minimal residual disease, which has a well-established negative impact on survival.

The authors also noted that blood product shortages have already begun in most affected countries, and how, in response, transfusion societies have called for conservative transfusion policies in strict adherence to evidence-based guidelines for patient’s blood management.

“COVID-19 will result in numerous casualties. Acute leukemia patients are at a higher risk of severe complications,” the authors stated. In particular, physicians should especially be aware of how treatment for acute leukemia may have “interactions with other drugs used to treat SARS-CoV-2–related infections/complications such as antibiotics, antiviral drugs, and various other drugs that prolong QTc or impact targeted-therapy pharmacokinetics,” they concluded.

The authors reported that they received no government or private funding for this research, and that they had no conflicts of interest.

[email protected]

SOURCE: Gavillet M et al. Leuk. Res. 2020. doi.org/10.1016/j.leukres.2020.106353.

The SARS-CoV-2 pandemic poses significant risks to leukemia patients and their providers, impacting every aspect of care from diagnosis through therapy, according to an editorial letter published online in Leukemia Research.

VashiDonsk/Creative Commons/CC ASA 3.0

One key concern to be considered is the risk of missed or delayed diagnosis due to the pandemic conditions. An estimated 50%-75% of patients with acute leukemia are febrile at diagnosis and this puts them at high risk of a misdiagnosis of COVID-19 upon initial evaluation. As with other oncological conditions (primary mediastinal lymphoma or lung cancer, for example), which often present with a cough with or without fever, their symptoms “are likely to be considered trivial after a negative SARS-CoV-2 test,” with patients then being sent home without further assessment. In a rapidly progressing disease such as acute leukemia, this could lead to critical delays in therapeutic intervention.

The authors, from the Service and Central Laboratory of Hematology, Lausanne (Switzerland) University Hospital, also discussed the problems that might occur with regard to most standard forms of therapy. In particular, they addressed potential impacts of the pandemic on chemotherapy, bone marrow transplantation, maintenance treatments, supportive measures, and targeted therapies.

Of particular concern, “most patients may suffer from postponed chemotherapy, due to a shortage of isolation beds and blood products or the wish to avoid immunosuppressive treatments,” the authors noted, warning that “delay in chemotherapy initiation may negatively affect prognosis, [particularly in patients under age 60] with favorable- or intermediate-risk disease.”

With regard to stem cell transplantation, the authors detail the many potential difficulties with regard to procedures involving both donors and recipients, and warn that in some cases, delay in transplant could result in the reappearance of a significant minimal residual disease, which has a well-established negative impact on survival.

The authors also noted that blood product shortages have already begun in most affected countries, and how, in response, transfusion societies have called for conservative transfusion policies in strict adherence to evidence-based guidelines for patient’s blood management.

“COVID-19 will result in numerous casualties. Acute leukemia patients are at a higher risk of severe complications,” the authors stated. In particular, physicians should especially be aware of how treatment for acute leukemia may have “interactions with other drugs used to treat SARS-CoV-2–related infections/complications such as antibiotics, antiviral drugs, and various other drugs that prolong QTc or impact targeted-therapy pharmacokinetics,” they concluded.

The authors reported that they received no government or private funding for this research, and that they had no conflicts of interest.

[email protected]

SOURCE: Gavillet M et al. Leuk. Res. 2020. doi.org/10.1016/j.leukres.2020.106353.

The SARS-CoV-2 pandemic poses significant risks to leukemia patients and their providers, impacting every aspect of care from diagnosis through therapy, according to an editorial letter published online in Leukemia Research.

VashiDonsk/Creative Commons/CC ASA 3.0

One key concern to be considered is the risk of missed or delayed diagnosis due to the pandemic conditions. An estimated 50%-75% of patients with acute leukemia are febrile at diagnosis and this puts them at high risk of a misdiagnosis of COVID-19 upon initial evaluation. As with other oncological conditions (primary mediastinal lymphoma or lung cancer, for example), which often present with a cough with or without fever, their symptoms “are likely to be considered trivial after a negative SARS-CoV-2 test,” with patients then being sent home without further assessment. In a rapidly progressing disease such as acute leukemia, this could lead to critical delays in therapeutic intervention.

The authors, from the Service and Central Laboratory of Hematology, Lausanne (Switzerland) University Hospital, also discussed the problems that might occur with regard to most standard forms of therapy. In particular, they addressed potential impacts of the pandemic on chemotherapy, bone marrow transplantation, maintenance treatments, supportive measures, and targeted therapies.

Of particular concern, “most patients may suffer from postponed chemotherapy, due to a shortage of isolation beds and blood products or the wish to avoid immunosuppressive treatments,” the authors noted, warning that “delay in chemotherapy initiation may negatively affect prognosis, [particularly in patients under age 60] with favorable- or intermediate-risk disease.”

With regard to stem cell transplantation, the authors detail the many potential difficulties with regard to procedures involving both donors and recipients, and warn that in some cases, delay in transplant could result in the reappearance of a significant minimal residual disease, which has a well-established negative impact on survival.

The authors also noted that blood product shortages have already begun in most affected countries, and how, in response, transfusion societies have called for conservative transfusion policies in strict adherence to evidence-based guidelines for patient’s blood management.

“COVID-19 will result in numerous casualties. Acute leukemia patients are at a higher risk of severe complications,” the authors stated. In particular, physicians should especially be aware of how treatment for acute leukemia may have “interactions with other drugs used to treat SARS-CoV-2–related infections/complications such as antibiotics, antiviral drugs, and various other drugs that prolong QTc or impact targeted-therapy pharmacokinetics,” they concluded.

The authors reported that they received no government or private funding for this research, and that they had no conflicts of interest.

[email protected]

SOURCE: Gavillet M et al. Leuk. Res. 2020. doi.org/10.1016/j.leukres.2020.106353.

The American Society for Transplantation and Cellular Therapy (ASTCT) has released interim guidelines for the care of hematopoietic cell transplantation (HCT) and cellular therapy patients in the light of the global SARS-CoV-2 pandemic.

The guidelines, summarized briefly below, focus on diagnostic and treatment considerations, evaluation of patients prior to initializing HCT and cellular therapy, and cell donor evaluation. Much of the guideline relies upon recommendations developed by the European Society for Blood and Marrow Transplantation (ESBMT). These guidelines were updated on March 16.

The ASTCT document focuses on patient-treatment specifics and does not cover specific infection-prevention policies and procedures, instead suggesting that local and institutional guidelines, such as those from the Centers for Disease Control and Prevention, should be followed. They did recommend that, in the local presence of COVID-19, “clinic visits that are not critical should be either deferred or substituted with telemedicine visits if deemed appropriate and feasible.”
 

Diagnostic considerations

In any patient with upper or lower respiratory symptoms, obtain polymerase chain reaction (PCR) testing for SARS-CoV-2, where possible, in addition to other respiratory virus PCR testing from any respiratory sample obtained, following CDC recommendations for sample collection and processing, which are continuously being updated on the CDC website.

These recommendations include nasal sampling, rather than oral sampling, and the discouraging of nasal washes where avoidable. If nasal washing is performed, it should be done with appropriate personal protective equipment as described by the CDC. The CDC has also provided additional infection prevention and control information for known and suspected COVID-19 patients in health care settings.

In patients positive for SARS-CoV-2 in an upper respiratory tract sample, chest imaging should be considered.

Preliminary reports suggest that there may be a discrepancy between upper- and lower-tract specimen positivity. Therefore, even when SARS-CoV-2 is not detected in an upper respiratory sample, the ASTCT recommends that chest imaging should be considered for lower respiratory tract infection when clinical symptoms of lower respiratory tract infection are present, including shortness of breath, hypoxia, and tachypnea.

With regard to routine bronchoalveolar lavage, the ASTCT recommends against it if a patient tests positive for SARS-CoV-2 given the risk of transmission among health care workers. The exception is in the case of suspected coinfection based on abnormal chest imaging and in patients for whom it is clinically indicated (for example, those receiving invasive mechanical ventilation). In addition to testing bronchoalveolar lavage samples for SARS-CoV-2, “copathogens should be evaluated and treated.”

Treatment considerations

“At this point no recommendations can be made on specific therapies due to limited data and unknown risk versus benefit; additional recommendations will be forthcoming. Even less data is available for pediatric patients. Treatment for viral, bacterial, and fungal copathogens should be optimized,” according to the ASTCT.

However, the society lists several therapies currently under consideration, which may be available through compassionate-use programs and are being investigated in current clinical trials in several countries, “including lopinavir/ritonavir, ribavirin, hydroxychloroquine, darunavir/cobicistat, and interferons-alpha and -beta.” Remdesivir, in particular, is being evaluated in a National Institutes of Health–sponsored, placebo-controlled clinical trial (NCT04280705).

In case of known or suspected COVID-19 with normal imaging and no or mild symptoms, no therapy is recommended. However, if symptoms progress or imaging is abnormal, an infectious disease specialist or department should be consulted, according to the ASTCT.

Evaluation prior to HCT or cellular therapy

“There is sufficient concern that COVID-19 could have a significant impact on posttransplant or posttherapy outcomes,” according to the guidelines, and the ASTCT provided the following recommendations to be considered in known or suspected COVID-19 patients. In particular, practitioners need to weigh the risk of delaying or altering therapy plans with the risk of progression of underlying disease.

If SARS-CoV-2 is detected in a respiratory specimen, HCT or cellular therapy procedures should be deferred. Therapy should also be deferred in HCT and cellular therapy candidates with close contact with a person infected with SARS-CoV-2 and in those patients who have traveled to a high-risk area or had close contact with a person traveling from an area at high risk for COVID-19.

In the case of a patient in a community with widespread disease, “all HCT and cellular therapy candidates should undergo screening for SARS-CoV-2 infection by PCR in respiratory specimens at the time of initial evaluation and 2 days prior to conditioning/lymphodepletion, regardless of the presence of symptoms, if testing is available.”

Procedures to be deferred include peripheral blood stem cell mobilization, bone marrow harvest, T-cell collections, and conditioning/lymphodepletion. These should not be performed for at least 14 days (preferably 21 days) from the day of last contact, according to the ASTCT. Two consecutive negative PCR tests each approximately 1 week apart (deferral for 14 days minimum), should be obtained, if available.

In areas with high community spread, the guidelines also state that “interim treatment and/or longer deferral of definite therapy should be considered when feasible (for example, multiple myeloma, germ cell tumors, consolidative transplants).”

Similar considerations should be afforded to potential cellular donors. Donors with SARS-CoV-2 detected in a respiratory sample are considered ineligible. Those meeting exposure criteria for patients, as listed above, should be excluded from donation for at least 28 days. “In individual circumstances, a donor may be considered eligible if respiratory samples are negative for SARS-CoV-2 by PCR and donor is asymptomatic. Donor should be closely monitored for COVID-19.”

In the case of unrelated donors, the ASTCT recommends referral to the National Marrow Donor Program (NMDP) guidelines for updated guidance, but points out that, according to the NMDP, the Food and Drug Administration reports that there have been no reported or suspected cases of transfusion-transmitted COVID-19 to date and that “no cases of transfusion-transmission were ever reported for the other two coronaviruses that emerged during the past 2 decades [SARS, the severe acute respiratory syndrome coronavirus, and MERS-CoV, which causes Mideast respiratory syndrome].”

This article was updated 3/26/20.

[email protected]

SOURCE: ASTCT Response to COVID-19. 2020. www.astct.org/connect/astct-response-to-covid-19.

The American Society for Transplantation and Cellular Therapy (ASTCT) has released interim guidelines for the care of hematopoietic cell transplantation (HCT) and cellular therapy patients in the light of the global SARS-CoV-2 pandemic.

The guidelines, summarized briefly below, focus on diagnostic and treatment considerations, evaluation of patients prior to initializing HCT and cellular therapy, and cell donor evaluation. Much of the guideline relies upon recommendations developed by the European Society for Blood and Marrow Transplantation (ESBMT). These guidelines were updated on March 16.

The ASTCT document focuses on patient-treatment specifics and does not cover specific infection-prevention policies and procedures, instead suggesting that local and institutional guidelines, such as those from the Centers for Disease Control and Prevention, should be followed. They did recommend that, in the local presence of COVID-19, “clinic visits that are not critical should be either deferred or substituted with telemedicine visits if deemed appropriate and feasible.”
 

Diagnostic considerations

In any patient with upper or lower respiratory symptoms, obtain polymerase chain reaction (PCR) testing for SARS-CoV-2, where possible, in addition to other respiratory virus PCR testing from any respiratory sample obtained, following CDC recommendations for sample collection and processing, which are continuously being updated on the CDC website.

These recommendations include nasal sampling, rather than oral sampling, and the discouraging of nasal washes where avoidable. If nasal washing is performed, it should be done with appropriate personal protective equipment as described by the CDC. The CDC has also provided additional infection prevention and control information for known and suspected COVID-19 patients in health care settings.

In patients positive for SARS-CoV-2 in an upper respiratory tract sample, chest imaging should be considered.

Preliminary reports suggest that there may be a discrepancy between upper- and lower-tract specimen positivity. Therefore, even when SARS-CoV-2 is not detected in an upper respiratory sample, the ASTCT recommends that chest imaging should be considered for lower respiratory tract infection when clinical symptoms of lower respiratory tract infection are present, including shortness of breath, hypoxia, and tachypnea.

With regard to routine bronchoalveolar lavage, the ASTCT recommends against it if a patient tests positive for SARS-CoV-2 given the risk of transmission among health care workers. The exception is in the case of suspected coinfection based on abnormal chest imaging and in patients for whom it is clinically indicated (for example, those receiving invasive mechanical ventilation). In addition to testing bronchoalveolar lavage samples for SARS-CoV-2, “copathogens should be evaluated and treated.”

Treatment considerations

“At this point no recommendations can be made on specific therapies due to limited data and unknown risk versus benefit; additional recommendations will be forthcoming. Even less data is available for pediatric patients. Treatment for viral, bacterial, and fungal copathogens should be optimized,” according to the ASTCT.

However, the society lists several therapies currently under consideration, which may be available through compassionate-use programs and are being investigated in current clinical trials in several countries, “including lopinavir/ritonavir, ribavirin, hydroxychloroquine, darunavir/cobicistat, and interferons-alpha and -beta.” Remdesivir, in particular, is being evaluated in a National Institutes of Health–sponsored, placebo-controlled clinical trial (NCT04280705).

In case of known or suspected COVID-19 with normal imaging and no or mild symptoms, no therapy is recommended. However, if symptoms progress or imaging is abnormal, an infectious disease specialist or department should be consulted, according to the ASTCT.

Evaluation prior to HCT or cellular therapy

“There is sufficient concern that COVID-19 could have a significant impact on posttransplant or posttherapy outcomes,” according to the guidelines, and the ASTCT provided the following recommendations to be considered in known or suspected COVID-19 patients. In particular, practitioners need to weigh the risk of delaying or altering therapy plans with the risk of progression of underlying disease.

If SARS-CoV-2 is detected in a respiratory specimen, HCT or cellular therapy procedures should be deferred. Therapy should also be deferred in HCT and cellular therapy candidates with close contact with a person infected with SARS-CoV-2 and in those patients who have traveled to a high-risk area or had close contact with a person traveling from an area at high risk for COVID-19.

In the case of a patient in a community with widespread disease, “all HCT and cellular therapy candidates should undergo screening for SARS-CoV-2 infection by PCR in respiratory specimens at the time of initial evaluation and 2 days prior to conditioning/lymphodepletion, regardless of the presence of symptoms, if testing is available.”

Procedures to be deferred include peripheral blood stem cell mobilization, bone marrow harvest, T-cell collections, and conditioning/lymphodepletion. These should not be performed for at least 14 days (preferably 21 days) from the day of last contact, according to the ASTCT. Two consecutive negative PCR tests each approximately 1 week apart (deferral for 14 days minimum), should be obtained, if available.

In areas with high community spread, the guidelines also state that “interim treatment and/or longer deferral of definite therapy should be considered when feasible (for example, multiple myeloma, germ cell tumors, consolidative transplants).”

Similar considerations should be afforded to potential cellular donors. Donors with SARS-CoV-2 detected in a respiratory sample are considered ineligible. Those meeting exposure criteria for patients, as listed above, should be excluded from donation for at least 28 days. “In individual circumstances, a donor may be considered eligible if respiratory samples are negative for SARS-CoV-2 by PCR and donor is asymptomatic. Donor should be closely monitored for COVID-19.”

In the case of unrelated donors, the ASTCT recommends referral to the National Marrow Donor Program (NMDP) guidelines for updated guidance, but points out that, according to the NMDP, the Food and Drug Administration reports that there have been no reported or suspected cases of transfusion-transmitted COVID-19 to date and that “no cases of transfusion-transmission were ever reported for the other two coronaviruses that emerged during the past 2 decades [SARS, the severe acute respiratory syndrome coronavirus, and MERS-CoV, which causes Mideast respiratory syndrome].”

This article was updated 3/26/20.

[email protected]

SOURCE: ASTCT Response to COVID-19. 2020. www.astct.org/connect/astct-response-to-covid-19.

The American Society for Transplantation and Cellular Therapy (ASTCT) has released interim guidelines for the care of hematopoietic cell transplantation (HCT) and cellular therapy patients in the light of the global SARS-CoV-2 pandemic.

The guidelines, summarized briefly below, focus on diagnostic and treatment considerations, evaluation of patients prior to initializing HCT and cellular therapy, and cell donor evaluation. Much of the guideline relies upon recommendations developed by the European Society for Blood and Marrow Transplantation (ESBMT). These guidelines were updated on March 16.

The ASTCT document focuses on patient-treatment specifics and does not cover specific infection-prevention policies and procedures, instead suggesting that local and institutional guidelines, such as those from the Centers for Disease Control and Prevention, should be followed. They did recommend that, in the local presence of COVID-19, “clinic visits that are not critical should be either deferred or substituted with telemedicine visits if deemed appropriate and feasible.”
 

Diagnostic considerations

In any patient with upper or lower respiratory symptoms, obtain polymerase chain reaction (PCR) testing for SARS-CoV-2, where possible, in addition to other respiratory virus PCR testing from any respiratory sample obtained, following CDC recommendations for sample collection and processing, which are continuously being updated on the CDC website.

These recommendations include nasal sampling, rather than oral sampling, and the discouraging of nasal washes where avoidable. If nasal washing is performed, it should be done with appropriate personal protective equipment as described by the CDC. The CDC has also provided additional infection prevention and control information for known and suspected COVID-19 patients in health care settings.

In patients positive for SARS-CoV-2 in an upper respiratory tract sample, chest imaging should be considered.

Preliminary reports suggest that there may be a discrepancy between upper- and lower-tract specimen positivity. Therefore, even when SARS-CoV-2 is not detected in an upper respiratory sample, the ASTCT recommends that chest imaging should be considered for lower respiratory tract infection when clinical symptoms of lower respiratory tract infection are present, including shortness of breath, hypoxia, and tachypnea.

With regard to routine bronchoalveolar lavage, the ASTCT recommends against it if a patient tests positive for SARS-CoV-2 given the risk of transmission among health care workers. The exception is in the case of suspected coinfection based on abnormal chest imaging and in patients for whom it is clinically indicated (for example, those receiving invasive mechanical ventilation). In addition to testing bronchoalveolar lavage samples for SARS-CoV-2, “copathogens should be evaluated and treated.”

Treatment considerations

“At this point no recommendations can be made on specific therapies due to limited data and unknown risk versus benefit; additional recommendations will be forthcoming. Even less data is available for pediatric patients. Treatment for viral, bacterial, and fungal copathogens should be optimized,” according to the ASTCT.

However, the society lists several therapies currently under consideration, which may be available through compassionate-use programs and are being investigated in current clinical trials in several countries, “including lopinavir/ritonavir, ribavirin, hydroxychloroquine, darunavir/cobicistat, and interferons-alpha and -beta.” Remdesivir, in particular, is being evaluated in a National Institutes of Health–sponsored, placebo-controlled clinical trial (NCT04280705).

In case of known or suspected COVID-19 with normal imaging and no or mild symptoms, no therapy is recommended. However, if symptoms progress or imaging is abnormal, an infectious disease specialist or department should be consulted, according to the ASTCT.

Evaluation prior to HCT or cellular therapy

“There is sufficient concern that COVID-19 could have a significant impact on posttransplant or posttherapy outcomes,” according to the guidelines, and the ASTCT provided the following recommendations to be considered in known or suspected COVID-19 patients. In particular, practitioners need to weigh the risk of delaying or altering therapy plans with the risk of progression of underlying disease.

If SARS-CoV-2 is detected in a respiratory specimen, HCT or cellular therapy procedures should be deferred. Therapy should also be deferred in HCT and cellular therapy candidates with close contact with a person infected with SARS-CoV-2 and in those patients who have traveled to a high-risk area or had close contact with a person traveling from an area at high risk for COVID-19.

In the case of a patient in a community with widespread disease, “all HCT and cellular therapy candidates should undergo screening for SARS-CoV-2 infection by PCR in respiratory specimens at the time of initial evaluation and 2 days prior to conditioning/lymphodepletion, regardless of the presence of symptoms, if testing is available.”

Procedures to be deferred include peripheral blood stem cell mobilization, bone marrow harvest, T-cell collections, and conditioning/lymphodepletion. These should not be performed for at least 14 days (preferably 21 days) from the day of last contact, according to the ASTCT. Two consecutive negative PCR tests each approximately 1 week apart (deferral for 14 days minimum), should be obtained, if available.

In areas with high community spread, the guidelines also state that “interim treatment and/or longer deferral of definite therapy should be considered when feasible (for example, multiple myeloma, germ cell tumors, consolidative transplants).”

Similar considerations should be afforded to potential cellular donors. Donors with SARS-CoV-2 detected in a respiratory sample are considered ineligible. Those meeting exposure criteria for patients, as listed above, should be excluded from donation for at least 28 days. “In individual circumstances, a donor may be considered eligible if respiratory samples are negative for SARS-CoV-2 by PCR and donor is asymptomatic. Donor should be closely monitored for COVID-19.”

In the case of unrelated donors, the ASTCT recommends referral to the National Marrow Donor Program (NMDP) guidelines for updated guidance, but points out that, according to the NMDP, the Food and Drug Administration reports that there have been no reported or suspected cases of transfusion-transmitted COVID-19 to date and that “no cases of transfusion-transmission were ever reported for the other two coronaviruses that emerged during the past 2 decades [SARS, the severe acute respiratory syndrome coronavirus, and MERS-CoV, which causes Mideast respiratory syndrome].”

This article was updated 3/26/20.

[email protected]

SOURCE: ASTCT Response to COVID-19. 2020. www.astct.org/connect/astct-response-to-covid-19.

ORLANDO – A second hematopoietic stem cell transplant can be a successful salvage therapy for a child who has experienced a relapse following a first allogeneic transplant, investigators report.

Neil Osterweil/MDedge News

A retrospective study of 221 children who experienced a relapse after a first hematopoietic stem cell transplant (HSCT) showed that 3-year overall survival (OS) was six times higher among those who had second HSCT, compared with those who did not, reported Akshay Sharma, MBBS, from St. Jude’s Children’s Research Hospital in Memphis.

“We found that factors that are typically associated with poor outcomes after transplant such as disease status at the time of first transplantation – being in remission or not, type of transplant – myeloablative or reduced intensity, and choice of donor were generally not significantly predictive of outcomes following posttransplant relapse in our multivariable model,” he said at the Transplantation and Cellular Therapy Meetings.

Relapse is the most common cause of death after HSCT, and 20%-30% of children who undergo allogeneic HSCT will experience a relapse.

To study this issue, Dr. Sharma and colleagues took a retrospective look at 703 patients 21 and younger who received a first alloHSCT at St. Jude’s for acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML) or myelodysplastic syndrome from 1990 through 2018. Of this cohort, 211 patients (31%) experienced a relapse after transplant.

There were no significant differences between patients who had a relapse and those who did not in sex, race, conditioning-regimen intensity, performance status, donor type, or graft type (peripheral blood stem cell, umbilical cord blood, bone marrow), or in the incidence of acute graft-versus-host disease GVHD.

The investigators found that, as expected, outcomes were poor for patients who experienced a posttransplant relapse, with 3-year overall survival from relapse for the 221 patients of just 10%.

In multivariable analysis controlling for sex, disease status at the time of first transplant, interval from first transplant to relapse, management after relapse, chronic GVHD and year of relapse, factors significantly associated with worse overall survival were relapse within 6 months of transplant vs. later than 6 months (hazard ratio, 4.6; P < .001) and decade of transplant (HR, 2.6 for 1990-2000 and 1.6 for 2001-2010 vs. 2011-2018; P < .001).

In contrast, both second HSCT and donor lymphocyte infusion were associated with better overall survival, compared with postrelapse chemotherapy or supportive care (HR, 0.04 and 0.6, respectively; P < .001 for both comparisons).

A longer interval from first transplant to relapse was the strongest predictor of long-term survival, Dr. Sharma said at the meeting held by the American Society for Blood and Marrow Transplantation and the Center for International Blood and Marrow Transplant Research.

Among the 221 patients who had a relapse, 61 (28%) had a second HSCT, 28 (13%) received only donor lymphocyte infusions, without second transplant, and 132 (62%) received either chemotherapy or supportive care.

The 3-year overall survival rate for patients who received a second transplant was 28%, compared with 4% for those who did not have a repeat HSCT. The most important independent predictors for getting a second transplant were longer time to relapse after first transplant, first transplantation from a matched sibling donor instead of from a haploidentical donor, some degree of acute GVHD, and decade of first transplant (current decade vs. earlier decades).

The investigators also looked at guideline recommendations from both the American Society of Hematology and UK National Health Service regarding second allogenenic transplant after relapse.

ASH guidelines say that “patients with chemo-sensitive disease in remission who had a long initial remission (> 6-12 months) after first transplant and who never developed any GVHD” are most likely to benefit from a second transplant.

NHS guidelines say that a second transplant can be considered for patients who experience relapse more than 12 months after first alloHSCT. But as Dr. Sharma and colleagues discovered, patients who had a second transplant had better overall survival regardless of time from first to second transplant, compared with patients who had later relapses but no second transplant.

“With these data in mind, we submit that these ASH and NHS guidelines, which are based on older data from the 1900s and 2000 and are mostly based on adult data and do not include much pediatric data should be reconsidered, at least in the context of pediatric patients as we approach them,” he said.

Jaap-Jan Boelens, MD, PhD, a pediatric transplant specialist at Memorial Sloan Kettering Cancer Center in New York City, who was not involved in the study, said that the use of second transplant as salvage therapy is becoming more common at his center.

“But there is a little nuance,” he said in an interview. “If someone relapses a month after transplant, let’s say, it doesn’t make sense to go for another allo transplant. But if the interval between transplant is longer, more than half a year, we usually consider going for a second allo transplant.”

The decision to attempt a second transplant may also hinge on the disease the patient is being treated for, and on the depth of remission prior to relapse, he said.

Reggie E. Duerst, MD, director of the Stem Cell Transplant Program at Ann & Robert H. Lurie Children’s Hospital of Chicago, said that trying to replicate the conditions of the first transplant may not work.

“It’s also a function of who was the donor for the first transplant – was it a matched sibling? And then for the second one do you go to an unrelated donor, or a half-matched relative, banking on the fact that the donor’s immune system for the second transplant is going to be able to mediate some kind of graft-versus-leukemia effect that wasn’t there the first time around?” he said.

Dr. Duerst, who was not involved in the study, noted that, for some patients with lymphoid malignancies, chimeric antigen receptor (CAR) T-cell therapy may be a more effective salvage strategy than second transplant, but added that it’s still too soon to know which strategy will be more effective.

The study was supported by St. Jude’s, the American Society of Hematology, and the American Society for Transplantation and Cellular Therapy. Dr. Sharma, Dr. Boelens, and Dr. Duerst reported having no relevant disclosures.

SOURCE: Sharma A et al. TCT 2020, Abstract 116.

ORLANDO – A second hematopoietic stem cell transplant can be a successful salvage therapy for a child who has experienced a relapse following a first allogeneic transplant, investigators report.

Neil Osterweil/MDedge News

A retrospective study of 221 children who experienced a relapse after a first hematopoietic stem cell transplant (HSCT) showed that 3-year overall survival (OS) was six times higher among those who had second HSCT, compared with those who did not, reported Akshay Sharma, MBBS, from St. Jude’s Children’s Research Hospital in Memphis.

“We found that factors that are typically associated with poor outcomes after transplant such as disease status at the time of first transplantation – being in remission or not, type of transplant – myeloablative or reduced intensity, and choice of donor were generally not significantly predictive of outcomes following posttransplant relapse in our multivariable model,” he said at the Transplantation and Cellular Therapy Meetings.

Relapse is the most common cause of death after HSCT, and 20%-30% of children who undergo allogeneic HSCT will experience a relapse.

To study this issue, Dr. Sharma and colleagues took a retrospective look at 703 patients 21 and younger who received a first alloHSCT at St. Jude’s for acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML) or myelodysplastic syndrome from 1990 through 2018. Of this cohort, 211 patients (31%) experienced a relapse after transplant.

There were no significant differences between patients who had a relapse and those who did not in sex, race, conditioning-regimen intensity, performance status, donor type, or graft type (peripheral blood stem cell, umbilical cord blood, bone marrow), or in the incidence of acute graft-versus-host disease GVHD.

The investigators found that, as expected, outcomes were poor for patients who experienced a posttransplant relapse, with 3-year overall survival from relapse for the 221 patients of just 10%.

In multivariable analysis controlling for sex, disease status at the time of first transplant, interval from first transplant to relapse, management after relapse, chronic GVHD and year of relapse, factors significantly associated with worse overall survival were relapse within 6 months of transplant vs. later than 6 months (hazard ratio, 4.6; P < .001) and decade of transplant (HR, 2.6 for 1990-2000 and 1.6 for 2001-2010 vs. 2011-2018; P < .001).

In contrast, both second HSCT and donor lymphocyte infusion were associated with better overall survival, compared with postrelapse chemotherapy or supportive care (HR, 0.04 and 0.6, respectively; P < .001 for both comparisons).

A longer interval from first transplant to relapse was the strongest predictor of long-term survival, Dr. Sharma said at the meeting held by the American Society for Blood and Marrow Transplantation and the Center for International Blood and Marrow Transplant Research.

Among the 221 patients who had a relapse, 61 (28%) had a second HSCT, 28 (13%) received only donor lymphocyte infusions, without second transplant, and 132 (62%) received either chemotherapy or supportive care.

The 3-year overall survival rate for patients who received a second transplant was 28%, compared with 4% for those who did not have a repeat HSCT. The most important independent predictors for getting a second transplant were longer time to relapse after first transplant, first transplantation from a matched sibling donor instead of from a haploidentical donor, some degree of acute GVHD, and decade of first transplant (current decade vs. earlier decades).

The investigators also looked at guideline recommendations from both the American Society of Hematology and UK National Health Service regarding second allogenenic transplant after relapse.

ASH guidelines say that “patients with chemo-sensitive disease in remission who had a long initial remission (> 6-12 months) after first transplant and who never developed any GVHD” are most likely to benefit from a second transplant.

NHS guidelines say that a second transplant can be considered for patients who experience relapse more than 12 months after first alloHSCT. But as Dr. Sharma and colleagues discovered, patients who had a second transplant had better overall survival regardless of time from first to second transplant, compared with patients who had later relapses but no second transplant.

“With these data in mind, we submit that these ASH and NHS guidelines, which are based on older data from the 1900s and 2000 and are mostly based on adult data and do not include much pediatric data should be reconsidered, at least in the context of pediatric patients as we approach them,” he said.

Jaap-Jan Boelens, MD, PhD, a pediatric transplant specialist at Memorial Sloan Kettering Cancer Center in New York City, who was not involved in the study, said that the use of second transplant as salvage therapy is becoming more common at his center.

“But there is a little nuance,” he said in an interview. “If someone relapses a month after transplant, let’s say, it doesn’t make sense to go for another allo transplant. But if the interval between transplant is longer, more than half a year, we usually consider going for a second allo transplant.”

The decision to attempt a second transplant may also hinge on the disease the patient is being treated for, and on the depth of remission prior to relapse, he said.

Reggie E. Duerst, MD, director of the Stem Cell Transplant Program at Ann & Robert H. Lurie Children’s Hospital of Chicago, said that trying to replicate the conditions of the first transplant may not work.

“It’s also a function of who was the donor for the first transplant – was it a matched sibling? And then for the second one do you go to an unrelated donor, or a half-matched relative, banking on the fact that the donor’s immune system for the second transplant is going to be able to mediate some kind of graft-versus-leukemia effect that wasn’t there the first time around?” he said.

Dr. Duerst, who was not involved in the study, noted that, for some patients with lymphoid malignancies, chimeric antigen receptor (CAR) T-cell therapy may be a more effective salvage strategy than second transplant, but added that it’s still too soon to know which strategy will be more effective.

The study was supported by St. Jude’s, the American Society of Hematology, and the American Society for Transplantation and Cellular Therapy. Dr. Sharma, Dr. Boelens, and Dr. Duerst reported having no relevant disclosures.

SOURCE: Sharma A et al. TCT 2020, Abstract 116.

ORLANDO – A second hematopoietic stem cell transplant can be a successful salvage therapy for a child who has experienced a relapse following a first allogeneic transplant, investigators report.

Neil Osterweil/MDedge News

A retrospective study of 221 children who experienced a relapse after a first hematopoietic stem cell transplant (HSCT) showed that 3-year overall survival (OS) was six times higher among those who had second HSCT, compared with those who did not, reported Akshay Sharma, MBBS, from St. Jude’s Children’s Research Hospital in Memphis.

“We found that factors that are typically associated with poor outcomes after transplant such as disease status at the time of first transplantation – being in remission or not, type of transplant – myeloablative or reduced intensity, and choice of donor were generally not significantly predictive of outcomes following posttransplant relapse in our multivariable model,” he said at the Transplantation and Cellular Therapy Meetings.

Relapse is the most common cause of death after HSCT, and 20%-30% of children who undergo allogeneic HSCT will experience a relapse.

To study this issue, Dr. Sharma and colleagues took a retrospective look at 703 patients 21 and younger who received a first alloHSCT at St. Jude’s for acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML) or myelodysplastic syndrome from 1990 through 2018. Of this cohort, 211 patients (31%) experienced a relapse after transplant.

There were no significant differences between patients who had a relapse and those who did not in sex, race, conditioning-regimen intensity, performance status, donor type, or graft type (peripheral blood stem cell, umbilical cord blood, bone marrow), or in the incidence of acute graft-versus-host disease GVHD.

The investigators found that, as expected, outcomes were poor for patients who experienced a posttransplant relapse, with 3-year overall survival from relapse for the 221 patients of just 10%.

In multivariable analysis controlling for sex, disease status at the time of first transplant, interval from first transplant to relapse, management after relapse, chronic GVHD and year of relapse, factors significantly associated with worse overall survival were relapse within 6 months of transplant vs. later than 6 months (hazard ratio, 4.6; P < .001) and decade of transplant (HR, 2.6 for 1990-2000 and 1.6 for 2001-2010 vs. 2011-2018; P < .001).

In contrast, both second HSCT and donor lymphocyte infusion were associated with better overall survival, compared with postrelapse chemotherapy or supportive care (HR, 0.04 and 0.6, respectively; P < .001 for both comparisons).

A longer interval from first transplant to relapse was the strongest predictor of long-term survival, Dr. Sharma said at the meeting held by the American Society for Blood and Marrow Transplantation and the Center for International Blood and Marrow Transplant Research.

Among the 221 patients who had a relapse, 61 (28%) had a second HSCT, 28 (13%) received only donor lymphocyte infusions, without second transplant, and 132 (62%) received either chemotherapy or supportive care.

The 3-year overall survival rate for patients who received a second transplant was 28%, compared with 4% for those who did not have a repeat HSCT. The most important independent predictors for getting a second transplant were longer time to relapse after first transplant, first transplantation from a matched sibling donor instead of from a haploidentical donor, some degree of acute GVHD, and decade of first transplant (current decade vs. earlier decades).

The investigators also looked at guideline recommendations from both the American Society of Hematology and UK National Health Service regarding second allogenenic transplant after relapse.

ASH guidelines say that “patients with chemo-sensitive disease in remission who had a long initial remission (> 6-12 months) after first transplant and who never developed any GVHD” are most likely to benefit from a second transplant.

NHS guidelines say that a second transplant can be considered for patients who experience relapse more than 12 months after first alloHSCT. But as Dr. Sharma and colleagues discovered, patients who had a second transplant had better overall survival regardless of time from first to second transplant, compared with patients who had later relapses but no second transplant.

“With these data in mind, we submit that these ASH and NHS guidelines, which are based on older data from the 1900s and 2000 and are mostly based on adult data and do not include much pediatric data should be reconsidered, at least in the context of pediatric patients as we approach them,” he said.

Jaap-Jan Boelens, MD, PhD, a pediatric transplant specialist at Memorial Sloan Kettering Cancer Center in New York City, who was not involved in the study, said that the use of second transplant as salvage therapy is becoming more common at his center.

“But there is a little nuance,” he said in an interview. “If someone relapses a month after transplant, let’s say, it doesn’t make sense to go for another allo transplant. But if the interval between transplant is longer, more than half a year, we usually consider going for a second allo transplant.”

The decision to attempt a second transplant may also hinge on the disease the patient is being treated for, and on the depth of remission prior to relapse, he said.

Reggie E. Duerst, MD, director of the Stem Cell Transplant Program at Ann & Robert H. Lurie Children’s Hospital of Chicago, said that trying to replicate the conditions of the first transplant may not work.

“It’s also a function of who was the donor for the first transplant – was it a matched sibling? And then for the second one do you go to an unrelated donor, or a half-matched relative, banking on the fact that the donor’s immune system for the second transplant is going to be able to mediate some kind of graft-versus-leukemia effect that wasn’t there the first time around?” he said.

Dr. Duerst, who was not involved in the study, noted that, for some patients with lymphoid malignancies, chimeric antigen receptor (CAR) T-cell therapy may be a more effective salvage strategy than second transplant, but added that it’s still too soon to know which strategy will be more effective.

The study was supported by St. Jude’s, the American Society of Hematology, and the American Society for Transplantation and Cellular Therapy. Dr. Sharma, Dr. Boelens, and Dr. Duerst reported having no relevant disclosures.

SOURCE: Sharma A et al. TCT 2020, Abstract 116.

Accelerated fetal growth was associated with acute myeloid leukemia (AML), especially in infant boys and those with minimally differentiated leukemia, according to researchers from the Childhood Leukemia International Consortium (CLIC).

They assessed data from 22 studies involving a total of 3,564 cases to determine if there was an association between fetal growth and AML. The researchers also examined whether this association might vary by age, sex and disease subtype, according to their report published in the European Journal of Cancer.

The researchers calculated pooled estimates by age, sex and overall for harmonized fetal growth markers in association with AML. They used data from 17 International Fetal and Newborn Growth Consortium for the 21st Century Project studies and performed meta-analyses on 5 more studies. They also did subanalyses based on AML subtype.

They found a nearly 50% increased risk of AML among large-for-gestational-age infant boys (odds ratio [OR]: 1.49, 95% confidence interval [CI]: 1.03-2.14), reduced to 34% in boys aged less than 2 years (OR: 1.34, 95% CI: 1.05-1.71) and 25% in boys aged 0-14 years (OR: 1.25, 95% CI: 1.06-1.46). The association of large for gestational age was stronger in boys with the M0/M1 subtype (OR: 1.80, 95% CI: 1.15-2.83). In addition, large birth length for gestational age was also positively associated with AML (OR: 1.38, 95% CI: 1.00-1.92) in boys. By contrast, there, none of these factors were associated with AML in girls, nor were there associates for girls with respect to decelerated fetal growth markers.

“Although the absolute risk seems to be low at a population level, given the rarity of childhood AML, it would be worth exploring whether modifiable factors leading to macrosomia may also affect AML risk to stimulate future monitoring and preventive interventions before and during pregnancy,” the researchers suggested.

The authors reported that they had no conflicts of interest.
 

[email protected]

SOURCE: Karalexi MA et al. Eur J Canc. 2020;130:1-11.

Accelerated fetal growth was associated with acute myeloid leukemia (AML), especially in infant boys and those with minimally differentiated leukemia, according to researchers from the Childhood Leukemia International Consortium (CLIC).

They assessed data from 22 studies involving a total of 3,564 cases to determine if there was an association between fetal growth and AML. The researchers also examined whether this association might vary by age, sex and disease subtype, according to their report published in the European Journal of Cancer.

The researchers calculated pooled estimates by age, sex and overall for harmonized fetal growth markers in association with AML. They used data from 17 International Fetal and Newborn Growth Consortium for the 21st Century Project studies and performed meta-analyses on 5 more studies. They also did subanalyses based on AML subtype.

They found a nearly 50% increased risk of AML among large-for-gestational-age infant boys (odds ratio [OR]: 1.49, 95% confidence interval [CI]: 1.03-2.14), reduced to 34% in boys aged less than 2 years (OR: 1.34, 95% CI: 1.05-1.71) and 25% in boys aged 0-14 years (OR: 1.25, 95% CI: 1.06-1.46). The association of large for gestational age was stronger in boys with the M0/M1 subtype (OR: 1.80, 95% CI: 1.15-2.83). In addition, large birth length for gestational age was also positively associated with AML (OR: 1.38, 95% CI: 1.00-1.92) in boys. By contrast, there, none of these factors were associated with AML in girls, nor were there associates for girls with respect to decelerated fetal growth markers.

“Although the absolute risk seems to be low at a population level, given the rarity of childhood AML, it would be worth exploring whether modifiable factors leading to macrosomia may also affect AML risk to stimulate future monitoring and preventive interventions before and during pregnancy,” the researchers suggested.

The authors reported that they had no conflicts of interest.
 

[email protected]

SOURCE: Karalexi MA et al. Eur J Canc. 2020;130:1-11.

Accelerated fetal growth was associated with acute myeloid leukemia (AML), especially in infant boys and those with minimally differentiated leukemia, according to researchers from the Childhood Leukemia International Consortium (CLIC).

They assessed data from 22 studies involving a total of 3,564 cases to determine if there was an association between fetal growth and AML. The researchers also examined whether this association might vary by age, sex and disease subtype, according to their report published in the European Journal of Cancer.

The researchers calculated pooled estimates by age, sex and overall for harmonized fetal growth markers in association with AML. They used data from 17 International Fetal and Newborn Growth Consortium for the 21st Century Project studies and performed meta-analyses on 5 more studies. They also did subanalyses based on AML subtype.

They found a nearly 50% increased risk of AML among large-for-gestational-age infant boys (odds ratio [OR]: 1.49, 95% confidence interval [CI]: 1.03-2.14), reduced to 34% in boys aged less than 2 years (OR: 1.34, 95% CI: 1.05-1.71) and 25% in boys aged 0-14 years (OR: 1.25, 95% CI: 1.06-1.46). The association of large for gestational age was stronger in boys with the M0/M1 subtype (OR: 1.80, 95% CI: 1.15-2.83). In addition, large birth length for gestational age was also positively associated with AML (OR: 1.38, 95% CI: 1.00-1.92) in boys. By contrast, there, none of these factors were associated with AML in girls, nor were there associates for girls with respect to decelerated fetal growth markers.

“Although the absolute risk seems to be low at a population level, given the rarity of childhood AML, it would be worth exploring whether modifiable factors leading to macrosomia may also affect AML risk to stimulate future monitoring and preventive interventions before and during pregnancy,” the researchers suggested.

The authors reported that they had no conflicts of interest.
 

[email protected]

SOURCE: Karalexi MA et al. Eur J Canc. 2020;130:1-11.

A treatment commonly used as a salvage regimen for relapsed/refractory acute myelogenous leukemia (AML) showed better results than did standard treatment when used as initial induction therapy.

Researchers found that the use of fludarabine, high-dose cytarabine, with granulocyte-colony stimulating factor (FLAG) – with or without idarubicin (Ida) – resulted in higher remission rates for nonfavorable risk AML patients after one course of induction, compared with standard 7+3 (anthracycline plus cytarabine) treatment.

The use of FLAG+/-Ida also resulted in a shorter time to complete remission (CR) and a shorter time to transplant, compared with 7+3. Additionally, postremission overall survival (OS) and disease-free survival (DFS) were better after achieving CR from FLAG-Ida, compared with 7+3, Melhem Solh, MD, of the Blood & Marrow Transplant Program at Northside Hospital, Atlanta, and colleagues reported in Leukemia Research.

The researchers retrospectively analyzed 304 consecutive AML patients, with nonfavorable National Comprehensive Cancer Network (NCCN) risk who received initial treatment at their center with either 7+3 (86 patients) or FLAG+/-Ida (218 patients). They found that patients in the FLAG+/-Ida group were more likely to achieve remission after one course of induction (74% vs. 62%; P less than .001) and had a faster time to achieve CR (30 days vs. 37.5 days; P less than .001), compared with patients receiving 7+3.

The time from diagnosis to allogeneic hematopoietic cell transplantation was shorter among CR patients after FLAG+/-Ida, compared with 7+3 (115 days vs. 151 days; P less than .003).

Additionally, the 3-year postremission OS and DFS were significantly better for patients receiving FLAG-Ida at 54% and 49%, compared with 39% and 32% for 7+3, respectively (P = .01).

Dr. Solh and colleagues found that the factors associated with postremission survival included age at first CR, NCCN risk, induction regimen (FLAG+/-Ida vs. 7+3; hazard ratio, 0.62; P = .01), and receipt of allogeneic hematopoietic cell transplantation.

“FLAG-Ida is a more efficacious regimen when used for initial induction compared to 3+7. It appears to produce better survival and improved postremission survival for AML patients with intermediate and poor risk AML without increasing toxicity,” Dr. Solh and colleagues wrote. “Further validation of these results in a well-designed randomized prospective trial will help define the best induction approaches for AML.”

There was no outside funding for this research and the authors reported that they had no relevant financial conflicts.

[email protected]

SOURCE: Solh MM et al. Leuk Res. 2020 Feb 14. doi: 10.1016/j.leukres.2020.106318.

A treatment commonly used as a salvage regimen for relapsed/refractory acute myelogenous leukemia (AML) showed better results than did standard treatment when used as initial induction therapy.

Researchers found that the use of fludarabine, high-dose cytarabine, with granulocyte-colony stimulating factor (FLAG) – with or without idarubicin (Ida) – resulted in higher remission rates for nonfavorable risk AML patients after one course of induction, compared with standard 7+3 (anthracycline plus cytarabine) treatment.

The use of FLAG+/-Ida also resulted in a shorter time to complete remission (CR) and a shorter time to transplant, compared with 7+3. Additionally, postremission overall survival (OS) and disease-free survival (DFS) were better after achieving CR from FLAG-Ida, compared with 7+3, Melhem Solh, MD, of the Blood & Marrow Transplant Program at Northside Hospital, Atlanta, and colleagues reported in Leukemia Research.

The researchers retrospectively analyzed 304 consecutive AML patients, with nonfavorable National Comprehensive Cancer Network (NCCN) risk who received initial treatment at their center with either 7+3 (86 patients) or FLAG+/-Ida (218 patients). They found that patients in the FLAG+/-Ida group were more likely to achieve remission after one course of induction (74% vs. 62%; P less than .001) and had a faster time to achieve CR (30 days vs. 37.5 days; P less than .001), compared with patients receiving 7+3.

The time from diagnosis to allogeneic hematopoietic cell transplantation was shorter among CR patients after FLAG+/-Ida, compared with 7+3 (115 days vs. 151 days; P less than .003).

Additionally, the 3-year postremission OS and DFS were significantly better for patients receiving FLAG-Ida at 54% and 49%, compared with 39% and 32% for 7+3, respectively (P = .01).

Dr. Solh and colleagues found that the factors associated with postremission survival included age at first CR, NCCN risk, induction regimen (FLAG+/-Ida vs. 7+3; hazard ratio, 0.62; P = .01), and receipt of allogeneic hematopoietic cell transplantation.

“FLAG-Ida is a more efficacious regimen when used for initial induction compared to 3+7. It appears to produce better survival and improved postremission survival for AML patients with intermediate and poor risk AML without increasing toxicity,” Dr. Solh and colleagues wrote. “Further validation of these results in a well-designed randomized prospective trial will help define the best induction approaches for AML.”

There was no outside funding for this research and the authors reported that they had no relevant financial conflicts.

[email protected]

SOURCE: Solh MM et al. Leuk Res. 2020 Feb 14. doi: 10.1016/j.leukres.2020.106318.

A treatment commonly used as a salvage regimen for relapsed/refractory acute myelogenous leukemia (AML) showed better results than did standard treatment when used as initial induction therapy.

Researchers found that the use of fludarabine, high-dose cytarabine, with granulocyte-colony stimulating factor (FLAG) – with or without idarubicin (Ida) – resulted in higher remission rates for nonfavorable risk AML patients after one course of induction, compared with standard 7+3 (anthracycline plus cytarabine) treatment.

The use of FLAG+/-Ida also resulted in a shorter time to complete remission (CR) and a shorter time to transplant, compared with 7+3. Additionally, postremission overall survival (OS) and disease-free survival (DFS) were better after achieving CR from FLAG-Ida, compared with 7+3, Melhem Solh, MD, of the Blood & Marrow Transplant Program at Northside Hospital, Atlanta, and colleagues reported in Leukemia Research.

The researchers retrospectively analyzed 304 consecutive AML patients, with nonfavorable National Comprehensive Cancer Network (NCCN) risk who received initial treatment at their center with either 7+3 (86 patients) or FLAG+/-Ida (218 patients). They found that patients in the FLAG+/-Ida group were more likely to achieve remission after one course of induction (74% vs. 62%; P less than .001) and had a faster time to achieve CR (30 days vs. 37.5 days; P less than .001), compared with patients receiving 7+3.

The time from diagnosis to allogeneic hematopoietic cell transplantation was shorter among CR patients after FLAG+/-Ida, compared with 7+3 (115 days vs. 151 days; P less than .003).

Additionally, the 3-year postremission OS and DFS were significantly better for patients receiving FLAG-Ida at 54% and 49%, compared with 39% and 32% for 7+3, respectively (P = .01).

Dr. Solh and colleagues found that the factors associated with postremission survival included age at first CR, NCCN risk, induction regimen (FLAG+/-Ida vs. 7+3; hazard ratio, 0.62; P = .01), and receipt of allogeneic hematopoietic cell transplantation.

“FLAG-Ida is a more efficacious regimen when used for initial induction compared to 3+7. It appears to produce better survival and improved postremission survival for AML patients with intermediate and poor risk AML without increasing toxicity,” Dr. Solh and colleagues wrote. “Further validation of these results in a well-designed randomized prospective trial will help define the best induction approaches for AML.”

There was no outside funding for this research and the authors reported that they had no relevant financial conflicts.

[email protected]

SOURCE: Solh MM et al. Leuk Res. 2020 Feb 14. doi: 10.1016/j.leukres.2020.106318.