TBD Meeting (3270-19)

ORLANDO – Treatments targeted to the neonatal Fc receptor are showing promise in phase 2 studies in primary immune thrombocytopenia, investigators reported at the annual meeting of the American Society of Hematology.

Encouraging outcomes support the continued phase 3 development of these agents, which are designed to block the neonatal Fc receptor (FcRn) in patients with this IgG-mediated disease.

Blocking FcRN is intended to prevent recycling of IgG, resulting in IgG degradation, according to the authors of studies evaluating rozanolixizumab, a subcutaneously administered monoclonal antibody, and efgartigimod, an intravenously administered antibody fragment, in primary immune thrombocytopenia (ITP).

Rozanolixizumab

Results of the phase 2 study of rozanolixizumab demonstrated that this agent reduced IgG levels and improved platelet counts at all doses tested, according to the investigators, led by Tadeusz Robak, MD, of the department of hematology at the Medical University of Lodz (Poland).

Efficacy endpoints were seen more quickly – by day 8 of treatment – with single subcutaneous infusions at higher doses, according to the researchers.

Headaches of mild to moderate severity were noted at higher doses, and no patients left the study because of adverse events, they reported.

“These safety, tolerability, and efficacy data support phase 3 development of rozanolixizumab in patients with primary ITP,” wrote Dr. Robak and coauthors in the abstract for their study.

A total of 66 adult patients with primary ITP were enrolled and treated with single or multiple subcutaneous doses of rozanolixizumab administered at 1-week intervals.

Baseline characteristics suggested a “difficult-to-treat” patient cohort that had a median ITP duration of nearly 6 years and a median of four prior therapies, including thrombopoietin receptor agonists in about one-third of patients, according to the investigators.

Platelet counts of at least 50 x 10⁹/L were achieved by day 8 in more than half of patients who received single doses of rozanolixizumab at higher dose levels of 15 mg/kg (58.3%) and 20 mg/kg (54.5%), Dr. Robak and colleagues reported.

Mild to moderate headaches were seen in about 40% of patients over an 8-week observation period. There were no serious infections and, of four serious adverse events occurring during the study, none were deemed to be treatment related, according to the investigators.

“People who have primary ITP may experience low platelet count that can put them at risk for severe bleeding, and there are limited options that provide a rapid increase in platelet count to reduce this risk,” Dr. Robak said in an interview. “These data build on the growing body of evidence that suggest targeting the FcRn pathway could have the potential to transform the treatment experience for people with rare IgG autoantibody–mediated diseases such as primary ITP.”

Efgartigimod

Substantial reductions in IgG levels and clinically relevant increases in platelet counts were seen following a 3-week treatment cycle with efgartigimod in patients with treatment-refractory ITP, according to investigator Adrian C. Newland, MB, BCh, of the Royal London Hospital and coinvestigators.

The human IgG1 antibody Fc-fragment, a natural ligand of FcRN, is engineered to have increased affinity to FcRn, while preserving its pH‐dependent binding, according to the investigators.

Efgartigimod treatment was well tolerated and reduced the proportion of patients with bleeding in the phase 2 study presented at ASH 2019.

“This suggests that targeted IgG reduction with efgartigimod is a potential new treatment modality in primary ITP, and warrants evaluation of longer-term treatment in a larger phase 3 study,” the investigators reported in the abstract for their study.

The report described 38 patients randomized to four weekly intravenous infusions of placebo or efgartigimod at one of two dosing levels. Patients had long-standing ITP, with a median 4.8 years disease duration, and all had either failed splenectomy or had inadequate response to prior treatment.

Efgartigimod treatment rapidly reduced total IgG in all patients who received it, with a mean change from baseline of up to 63.7%, according to investigators.

Platelet counts favored the investigational treatment over placebo by several measures. Platelet counts of at least 50 x 10⁹/L on two or more occasions were seen in 46% of efgartigimod-treated patients and 25% of the placebo group; that platelet count was achieved for 10 or more days in 38% and 0% of the efgartigimod and placebo groups, respectively.

Treatment was well tolerated, according to the investigators, who said there were “no dose-related safety observations.” Full results of the phase 2 investigation were published in the American Journal of Hematology, concurrent with the meeting (2019 Dec 10. doi.org/10.1002/ajh.25680).

The study of rozanolixizumab was supported by UCB; Dr. Robak reported disclosures related to UCB (honoraria, research funding), as well as Takeda, Janssen, Amgen, Roche, AbbVie, Gilead, BeiGene, Acerta, and MorphoSys. The study of efgartigimod was supported by argenx; Dr. Newland reported disclosures related to argenx, Novartis, Angle, Amgen, Ono Pharmaceutical, Shionogi, Rigel, and Dova Pharmaceuticals.
 

SOURCEs: Robak T et al. ASH 2019, Abstract 897; Newland AC et al. ASH 2019, Abstract 895.

ORLANDO – Treatments targeted to the neonatal Fc receptor are showing promise in phase 2 studies in primary immune thrombocytopenia, investigators reported at the annual meeting of the American Society of Hematology.

Encouraging outcomes support the continued phase 3 development of these agents, which are designed to block the neonatal Fc receptor (FcRn) in patients with this IgG-mediated disease.

Blocking FcRN is intended to prevent recycling of IgG, resulting in IgG degradation, according to the authors of studies evaluating rozanolixizumab, a subcutaneously administered monoclonal antibody, and efgartigimod, an intravenously administered antibody fragment, in primary immune thrombocytopenia (ITP).

Rozanolixizumab

Results of the phase 2 study of rozanolixizumab demonstrated that this agent reduced IgG levels and improved platelet counts at all doses tested, according to the investigators, led by Tadeusz Robak, MD, of the department of hematology at the Medical University of Lodz (Poland).

Efficacy endpoints were seen more quickly – by day 8 of treatment – with single subcutaneous infusions at higher doses, according to the researchers.

Headaches of mild to moderate severity were noted at higher doses, and no patients left the study because of adverse events, they reported.

“These safety, tolerability, and efficacy data support phase 3 development of rozanolixizumab in patients with primary ITP,” wrote Dr. Robak and coauthors in the abstract for their study.

A total of 66 adult patients with primary ITP were enrolled and treated with single or multiple subcutaneous doses of rozanolixizumab administered at 1-week intervals.

Baseline characteristics suggested a “difficult-to-treat” patient cohort that had a median ITP duration of nearly 6 years and a median of four prior therapies, including thrombopoietin receptor agonists in about one-third of patients, according to the investigators.

Platelet counts of at least 50 x 10⁹/L were achieved by day 8 in more than half of patients who received single doses of rozanolixizumab at higher dose levels of 15 mg/kg (58.3%) and 20 mg/kg (54.5%), Dr. Robak and colleagues reported.

Mild to moderate headaches were seen in about 40% of patients over an 8-week observation period. There were no serious infections and, of four serious adverse events occurring during the study, none were deemed to be treatment related, according to the investigators.

“People who have primary ITP may experience low platelet count that can put them at risk for severe bleeding, and there are limited options that provide a rapid increase in platelet count to reduce this risk,” Dr. Robak said in an interview. “These data build on the growing body of evidence that suggest targeting the FcRn pathway could have the potential to transform the treatment experience for people with rare IgG autoantibody–mediated diseases such as primary ITP.”

Efgartigimod

Substantial reductions in IgG levels and clinically relevant increases in platelet counts were seen following a 3-week treatment cycle with efgartigimod in patients with treatment-refractory ITP, according to investigator Adrian C. Newland, MB, BCh, of the Royal London Hospital and coinvestigators.

The human IgG1 antibody Fc-fragment, a natural ligand of FcRN, is engineered to have increased affinity to FcRn, while preserving its pH‐dependent binding, according to the investigators.

Efgartigimod treatment was well tolerated and reduced the proportion of patients with bleeding in the phase 2 study presented at ASH 2019.

“This suggests that targeted IgG reduction with efgartigimod is a potential new treatment modality in primary ITP, and warrants evaluation of longer-term treatment in a larger phase 3 study,” the investigators reported in the abstract for their study.

The report described 38 patients randomized to four weekly intravenous infusions of placebo or efgartigimod at one of two dosing levels. Patients had long-standing ITP, with a median 4.8 years disease duration, and all had either failed splenectomy or had inadequate response to prior treatment.

Efgartigimod treatment rapidly reduced total IgG in all patients who received it, with a mean change from baseline of up to 63.7%, according to investigators.

Platelet counts favored the investigational treatment over placebo by several measures. Platelet counts of at least 50 x 10⁹/L on two or more occasions were seen in 46% of efgartigimod-treated patients and 25% of the placebo group; that platelet count was achieved for 10 or more days in 38% and 0% of the efgartigimod and placebo groups, respectively.

Treatment was well tolerated, according to the investigators, who said there were “no dose-related safety observations.” Full results of the phase 2 investigation were published in the American Journal of Hematology, concurrent with the meeting (2019 Dec 10. doi.org/10.1002/ajh.25680).

The study of rozanolixizumab was supported by UCB; Dr. Robak reported disclosures related to UCB (honoraria, research funding), as well as Takeda, Janssen, Amgen, Roche, AbbVie, Gilead, BeiGene, Acerta, and MorphoSys. The study of efgartigimod was supported by argenx; Dr. Newland reported disclosures related to argenx, Novartis, Angle, Amgen, Ono Pharmaceutical, Shionogi, Rigel, and Dova Pharmaceuticals.
 

SOURCEs: Robak T et al. ASH 2019, Abstract 897; Newland AC et al. ASH 2019, Abstract 895.

ORLANDO – Treatments targeted to the neonatal Fc receptor are showing promise in phase 2 studies in primary immune thrombocytopenia, investigators reported at the annual meeting of the American Society of Hematology.

Encouraging outcomes support the continued phase 3 development of these agents, which are designed to block the neonatal Fc receptor (FcRn) in patients with this IgG-mediated disease.

Blocking FcRN is intended to prevent recycling of IgG, resulting in IgG degradation, according to the authors of studies evaluating rozanolixizumab, a subcutaneously administered monoclonal antibody, and efgartigimod, an intravenously administered antibody fragment, in primary immune thrombocytopenia (ITP).

Rozanolixizumab

Results of the phase 2 study of rozanolixizumab demonstrated that this agent reduced IgG levels and improved platelet counts at all doses tested, according to the investigators, led by Tadeusz Robak, MD, of the department of hematology at the Medical University of Lodz (Poland).

Efficacy endpoints were seen more quickly – by day 8 of treatment – with single subcutaneous infusions at higher doses, according to the researchers.

Headaches of mild to moderate severity were noted at higher doses, and no patients left the study because of adverse events, they reported.

“These safety, tolerability, and efficacy data support phase 3 development of rozanolixizumab in patients with primary ITP,” wrote Dr. Robak and coauthors in the abstract for their study.

A total of 66 adult patients with primary ITP were enrolled and treated with single or multiple subcutaneous doses of rozanolixizumab administered at 1-week intervals.

Baseline characteristics suggested a “difficult-to-treat” patient cohort that had a median ITP duration of nearly 6 years and a median of four prior therapies, including thrombopoietin receptor agonists in about one-third of patients, according to the investigators.

Platelet counts of at least 50 x 10⁹/L were achieved by day 8 in more than half of patients who received single doses of rozanolixizumab at higher dose levels of 15 mg/kg (58.3%) and 20 mg/kg (54.5%), Dr. Robak and colleagues reported.

Mild to moderate headaches were seen in about 40% of patients over an 8-week observation period. There were no serious infections and, of four serious adverse events occurring during the study, none were deemed to be treatment related, according to the investigators.

“People who have primary ITP may experience low platelet count that can put them at risk for severe bleeding, and there are limited options that provide a rapid increase in platelet count to reduce this risk,” Dr. Robak said in an interview. “These data build on the growing body of evidence that suggest targeting the FcRn pathway could have the potential to transform the treatment experience for people with rare IgG autoantibody–mediated diseases such as primary ITP.”

Efgartigimod

Substantial reductions in IgG levels and clinically relevant increases in platelet counts were seen following a 3-week treatment cycle with efgartigimod in patients with treatment-refractory ITP, according to investigator Adrian C. Newland, MB, BCh, of the Royal London Hospital and coinvestigators.

The human IgG1 antibody Fc-fragment, a natural ligand of FcRN, is engineered to have increased affinity to FcRn, while preserving its pH‐dependent binding, according to the investigators.

Efgartigimod treatment was well tolerated and reduced the proportion of patients with bleeding in the phase 2 study presented at ASH 2019.

“This suggests that targeted IgG reduction with efgartigimod is a potential new treatment modality in primary ITP, and warrants evaluation of longer-term treatment in a larger phase 3 study,” the investigators reported in the abstract for their study.

The report described 38 patients randomized to four weekly intravenous infusions of placebo or efgartigimod at one of two dosing levels. Patients had long-standing ITP, with a median 4.8 years disease duration, and all had either failed splenectomy or had inadequate response to prior treatment.

Efgartigimod treatment rapidly reduced total IgG in all patients who received it, with a mean change from baseline of up to 63.7%, according to investigators.

Platelet counts favored the investigational treatment over placebo by several measures. Platelet counts of at least 50 x 10⁹/L on two or more occasions were seen in 46% of efgartigimod-treated patients and 25% of the placebo group; that platelet count was achieved for 10 or more days in 38% and 0% of the efgartigimod and placebo groups, respectively.

Treatment was well tolerated, according to the investigators, who said there were “no dose-related safety observations.” Full results of the phase 2 investigation were published in the American Journal of Hematology, concurrent with the meeting (2019 Dec 10. doi.org/10.1002/ajh.25680).

The study of rozanolixizumab was supported by UCB; Dr. Robak reported disclosures related to UCB (honoraria, research funding), as well as Takeda, Janssen, Amgen, Roche, AbbVie, Gilead, BeiGene, Acerta, and MorphoSys. The study of efgartigimod was supported by argenx; Dr. Newland reported disclosures related to argenx, Novartis, Angle, Amgen, Ono Pharmaceutical, Shionogi, Rigel, and Dova Pharmaceuticals.
 

SOURCEs: Robak T et al. ASH 2019, Abstract 897; Newland AC et al. ASH 2019, Abstract 895.

ORLANDO – An investigational selective inhibitor of the complement pathway, sutimlimab, induced rapid and sustained benefits in patients with cold agglutinin disease, a rare autoimmune hemolytic anemia with no currently approved effective therapies.

Neil Osterweil/MDedge News

Among 24 patients with cold agglutinin disease who received at least one dose of sutimlimab in a phase 3 trial, 20 had a mean increase in hemoglobin of at least 1 g/dL, and 17 remained transfusion free from weeks 5 to 26 following sutimlimab infusion.

“Sutimlimab has the potential to change treatment practices for patients with this disease,” said lead author Alexander Röth, MD, from the University of Duisburg-Essen (Germany), at a late-breaking abstract session at the annual meeting of the American Society of Hematology.

Mean total bilirubin rapidly normalized within 1-3 weeks of infusion of sutimlimab, and patients had a mean improvement of 11 points on the Functional Assessment of Chronic Illness Therapy–Fatigue scale (FACIT-F), indicating a substantial improvement in their quality of life, Dr. Röth said.

Cold agglutinin disease is an acquired hemolytic anemia with an underlying lymphoproliferative disorder. The estimated prevalence of the disease is 16 per 1 million persons. The disease is characterized by hemolysis driven by activation of the complement pathway, leading to opsonization of erythrocytes (coating of erythrocytes with particles that facilitate phagocytosis and other immune reactions), extravascular hemolysis (primarily in the liver), intravascular hemolysis, and anemia.

Patients experience severe fatigue and poor quality of life, as well as increased risk for thrombosis and mortality, compared with matched cohorts.

Sutimlimab is a humanized monoclonal antibody that blocks the C1s component of the classical complement pathway, thereby stopping pathway activation while leaving alternative lectin pathways intact.

Dr. Röth presented results of the phase 3, open-label Cardinal study. Patients with cold agglutinin disease with baseline hemoglobin of 10 g/dL or less, active hemolysis signaled by total bilirubin levels above normal, and at least one blood transfusion within the past 6 months were eligible for the study. Patients with secondary cold agglutinin syndrome or rituximab therapy within the last 3 months or combination therapies within the last 6 months were excluded.

Sutimlimab was delivered intravenously at a dose of 6.5 g for patients under 75 kg in weight and 7.5 g for those 75 kg and over at day 0 and 7, then every 2 weeks thereafter.

A total of 24 patients with a mean age of 71 years were enrolled. Of the 24 patients, 15 (62.5%) were women.

The patients had received a mean of 3.2 transfusions (range 1-19) in the previous 6 months, and 15 had received one or more prior targeted therapies for the disease within the last 5 years. The mean baseline hemoglobin level was 8.6 (range 4.9-11.1) g/dL.

Hemoglobin levels increased rapidly after the first infusion, with a mean increase of 1.2 g/dL at the end of week 1, and 2.3 g/dL after week 3.

The estimated mean increase at treatment assessment (an average of weeks 23, 25, and 26) – the primary endpoint – was 2.6 g/dL, exceeding the prespecified increase of at least 2 g/dL. Normalization of hemoglobin to 12 g/dL or greater was an alternative primary endpoint. The trial met the primary endpoint, with 13 of 24 patients (54.2%) achieving either of the two prespecified events.

The mean overall hemoglobin level was maintained above 11 g/dL after week 3. Of the 24 patients, 20 had hemoglobin increases of 1 g/dL or greater.

Mean total bilirubin, a marker of hemolysis, dropped markedly within hours of infusion and was normalized by week 3.

As noted before, patient quality of life, as measured by the FACIT-F scale, improved by a mean of 11 points from a mean baseline of 32 out of 52 points.

All but two patients had one or more treatment-emergent adverse events, and seven of these patients had a serious treatment-related event, although none of the serious events were thought to be related to sutimlimab. One patient with liver cancer died from causes deemed unrelated to the drug. There were no meningococcal infections.

All 22 patients who completed the 26 weeks of therapy continued on an extended safety phase of the study.

The study results demonstrate that targeting the complement pathways is an novel and effective approach to managing cold agglutinin disease, Dr. Röth concluded.

Neil Osterweil/MDedge News

In a press briefing the day before the presentation, moderator Robert Brodsky, MD, professor of medicine and director of the division of hematology at Johns Hopkins School, Baltimore, who treats patients with cold agglutinin disease, said that the results “are very exciting.”

“These patients are very difficult to treat and there really is no approved drug,” he said. “Right now, we usually use [rituximab] first line, but only half of those patients respond, and usually it only lasts for 6 months or so, so this is a welcome addition.”

Sutimlimab was granted Breakthrough Therapy designation by the Food and Drug Administration, and Orphan Drug status by the FDA, European Medicines Agency, and the Pharmaceuticals and Medical Devices Agency in Japan.

The study was supported by Sanofi. Dr. Röth reported financial relationships with Sanofi and other companies.

SOURCE: Röth A et al. ASH 2019, Abstract LBA-2.

ORLANDO – An investigational selective inhibitor of the complement pathway, sutimlimab, induced rapid and sustained benefits in patients with cold agglutinin disease, a rare autoimmune hemolytic anemia with no currently approved effective therapies.

Neil Osterweil/MDedge News

Among 24 patients with cold agglutinin disease who received at least one dose of sutimlimab in a phase 3 trial, 20 had a mean increase in hemoglobin of at least 1 g/dL, and 17 remained transfusion free from weeks 5 to 26 following sutimlimab infusion.

“Sutimlimab has the potential to change treatment practices for patients with this disease,” said lead author Alexander Röth, MD, from the University of Duisburg-Essen (Germany), at a late-breaking abstract session at the annual meeting of the American Society of Hematology.

Mean total bilirubin rapidly normalized within 1-3 weeks of infusion of sutimlimab, and patients had a mean improvement of 11 points on the Functional Assessment of Chronic Illness Therapy–Fatigue scale (FACIT-F), indicating a substantial improvement in their quality of life, Dr. Röth said.

Cold agglutinin disease is an acquired hemolytic anemia with an underlying lymphoproliferative disorder. The estimated prevalence of the disease is 16 per 1 million persons. The disease is characterized by hemolysis driven by activation of the complement pathway, leading to opsonization of erythrocytes (coating of erythrocytes with particles that facilitate phagocytosis and other immune reactions), extravascular hemolysis (primarily in the liver), intravascular hemolysis, and anemia.

Patients experience severe fatigue and poor quality of life, as well as increased risk for thrombosis and mortality, compared with matched cohorts.

Sutimlimab is a humanized monoclonal antibody that blocks the C1s component of the classical complement pathway, thereby stopping pathway activation while leaving alternative lectin pathways intact.

Dr. Röth presented results of the phase 3, open-label Cardinal study. Patients with cold agglutinin disease with baseline hemoglobin of 10 g/dL or less, active hemolysis signaled by total bilirubin levels above normal, and at least one blood transfusion within the past 6 months were eligible for the study. Patients with secondary cold agglutinin syndrome or rituximab therapy within the last 3 months or combination therapies within the last 6 months were excluded.

Sutimlimab was delivered intravenously at a dose of 6.5 g for patients under 75 kg in weight and 7.5 g for those 75 kg and over at day 0 and 7, then every 2 weeks thereafter.

A total of 24 patients with a mean age of 71 years were enrolled. Of the 24 patients, 15 (62.5%) were women.

The patients had received a mean of 3.2 transfusions (range 1-19) in the previous 6 months, and 15 had received one or more prior targeted therapies for the disease within the last 5 years. The mean baseline hemoglobin level was 8.6 (range 4.9-11.1) g/dL.

Hemoglobin levels increased rapidly after the first infusion, with a mean increase of 1.2 g/dL at the end of week 1, and 2.3 g/dL after week 3.

The estimated mean increase at treatment assessment (an average of weeks 23, 25, and 26) – the primary endpoint – was 2.6 g/dL, exceeding the prespecified increase of at least 2 g/dL. Normalization of hemoglobin to 12 g/dL or greater was an alternative primary endpoint. The trial met the primary endpoint, with 13 of 24 patients (54.2%) achieving either of the two prespecified events.

The mean overall hemoglobin level was maintained above 11 g/dL after week 3. Of the 24 patients, 20 had hemoglobin increases of 1 g/dL or greater.

Mean total bilirubin, a marker of hemolysis, dropped markedly within hours of infusion and was normalized by week 3.

As noted before, patient quality of life, as measured by the FACIT-F scale, improved by a mean of 11 points from a mean baseline of 32 out of 52 points.

All but two patients had one or more treatment-emergent adverse events, and seven of these patients had a serious treatment-related event, although none of the serious events were thought to be related to sutimlimab. One patient with liver cancer died from causes deemed unrelated to the drug. There were no meningococcal infections.

All 22 patients who completed the 26 weeks of therapy continued on an extended safety phase of the study.

The study results demonstrate that targeting the complement pathways is an novel and effective approach to managing cold agglutinin disease, Dr. Röth concluded.

Neil Osterweil/MDedge News

In a press briefing the day before the presentation, moderator Robert Brodsky, MD, professor of medicine and director of the division of hematology at Johns Hopkins School, Baltimore, who treats patients with cold agglutinin disease, said that the results “are very exciting.”

“These patients are very difficult to treat and there really is no approved drug,” he said. “Right now, we usually use [rituximab] first line, but only half of those patients respond, and usually it only lasts for 6 months or so, so this is a welcome addition.”

Sutimlimab was granted Breakthrough Therapy designation by the Food and Drug Administration, and Orphan Drug status by the FDA, European Medicines Agency, and the Pharmaceuticals and Medical Devices Agency in Japan.

The study was supported by Sanofi. Dr. Röth reported financial relationships with Sanofi and other companies.

SOURCE: Röth A et al. ASH 2019, Abstract LBA-2.

ORLANDO – An investigational selective inhibitor of the complement pathway, sutimlimab, induced rapid and sustained benefits in patients with cold agglutinin disease, a rare autoimmune hemolytic anemia with no currently approved effective therapies.

Neil Osterweil/MDedge News

Among 24 patients with cold agglutinin disease who received at least one dose of sutimlimab in a phase 3 trial, 20 had a mean increase in hemoglobin of at least 1 g/dL, and 17 remained transfusion free from weeks 5 to 26 following sutimlimab infusion.

“Sutimlimab has the potential to change treatment practices for patients with this disease,” said lead author Alexander Röth, MD, from the University of Duisburg-Essen (Germany), at a late-breaking abstract session at the annual meeting of the American Society of Hematology.

Mean total bilirubin rapidly normalized within 1-3 weeks of infusion of sutimlimab, and patients had a mean improvement of 11 points on the Functional Assessment of Chronic Illness Therapy–Fatigue scale (FACIT-F), indicating a substantial improvement in their quality of life, Dr. Röth said.

Cold agglutinin disease is an acquired hemolytic anemia with an underlying lymphoproliferative disorder. The estimated prevalence of the disease is 16 per 1 million persons. The disease is characterized by hemolysis driven by activation of the complement pathway, leading to opsonization of erythrocytes (coating of erythrocytes with particles that facilitate phagocytosis and other immune reactions), extravascular hemolysis (primarily in the liver), intravascular hemolysis, and anemia.

Patients experience severe fatigue and poor quality of life, as well as increased risk for thrombosis and mortality, compared with matched cohorts.

Sutimlimab is a humanized monoclonal antibody that blocks the C1s component of the classical complement pathway, thereby stopping pathway activation while leaving alternative lectin pathways intact.

Dr. Röth presented results of the phase 3, open-label Cardinal study. Patients with cold agglutinin disease with baseline hemoglobin of 10 g/dL or less, active hemolysis signaled by total bilirubin levels above normal, and at least one blood transfusion within the past 6 months were eligible for the study. Patients with secondary cold agglutinin syndrome or rituximab therapy within the last 3 months or combination therapies within the last 6 months were excluded.

Sutimlimab was delivered intravenously at a dose of 6.5 g for patients under 75 kg in weight and 7.5 g for those 75 kg and over at day 0 and 7, then every 2 weeks thereafter.

A total of 24 patients with a mean age of 71 years were enrolled. Of the 24 patients, 15 (62.5%) were women.

The patients had received a mean of 3.2 transfusions (range 1-19) in the previous 6 months, and 15 had received one or more prior targeted therapies for the disease within the last 5 years. The mean baseline hemoglobin level was 8.6 (range 4.9-11.1) g/dL.

Hemoglobin levels increased rapidly after the first infusion, with a mean increase of 1.2 g/dL at the end of week 1, and 2.3 g/dL after week 3.

The estimated mean increase at treatment assessment (an average of weeks 23, 25, and 26) – the primary endpoint – was 2.6 g/dL, exceeding the prespecified increase of at least 2 g/dL. Normalization of hemoglobin to 12 g/dL or greater was an alternative primary endpoint. The trial met the primary endpoint, with 13 of 24 patients (54.2%) achieving either of the two prespecified events.

The mean overall hemoglobin level was maintained above 11 g/dL after week 3. Of the 24 patients, 20 had hemoglobin increases of 1 g/dL or greater.

Mean total bilirubin, a marker of hemolysis, dropped markedly within hours of infusion and was normalized by week 3.

As noted before, patient quality of life, as measured by the FACIT-F scale, improved by a mean of 11 points from a mean baseline of 32 out of 52 points.

All but two patients had one or more treatment-emergent adverse events, and seven of these patients had a serious treatment-related event, although none of the serious events were thought to be related to sutimlimab. One patient with liver cancer died from causes deemed unrelated to the drug. There were no meningococcal infections.

All 22 patients who completed the 26 weeks of therapy continued on an extended safety phase of the study.

The study results demonstrate that targeting the complement pathways is an novel and effective approach to managing cold agglutinin disease, Dr. Röth concluded.

Neil Osterweil/MDedge News

In a press briefing the day before the presentation, moderator Robert Brodsky, MD, professor of medicine and director of the division of hematology at Johns Hopkins School, Baltimore, who treats patients with cold agglutinin disease, said that the results “are very exciting.”

“These patients are very difficult to treat and there really is no approved drug,” he said. “Right now, we usually use [rituximab] first line, but only half of those patients respond, and usually it only lasts for 6 months or so, so this is a welcome addition.”

Sutimlimab was granted Breakthrough Therapy designation by the Food and Drug Administration, and Orphan Drug status by the FDA, European Medicines Agency, and the Pharmaceuticals and Medical Devices Agency in Japan.

The study was supported by Sanofi. Dr. Röth reported financial relationships with Sanofi and other companies.

SOURCE: Röth A et al. ASH 2019, Abstract LBA-2.

ORLANDO – A novel Bruton tyrosine kinase inhibitor has produced favorable results in patients with relapsed or refractory mantle cell lymphoma, according to findings presented at the annual meeting of the American Society of Hematology.

Jennifer Smith/MDedge

In a phase 2 trial, orelabrutinib produced an overall response rate of 86% and a 12-month progression-free survival rate of 64%. Safety results with orelabrutinib were superior to historical results with ibrutinib.

The efficacy and safety profile of orelabrutinib, as well as its “convenient” dosing, may make it the “preferred therapeutic choice for B-cell malignancy,” said Lijuan Deng, MD, PhD, of Peking University Cancer Hospital & Institute, Beijing, who presented the phase 2 trial of orelabrutinib at ASH 2019.

The trial enrolled 106 patients with relapsed/refractory mantle cell lymphoma who were treated at 22 centers in China. At baseline, the patients had a median age of 62 years (range, 37-73 years), and 79.2% were men. Most patients (94.4%) had stage III-IV disease.

Prior therapies included CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisolone)-based (69.8%), EPOCH (etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin)-based (22.6%), DHAP (dexamethasone, cytarabine, and cisplatin)-based (22.6%), CVAD (cyclophosphamide, vincristine, doxorubicin, dexamethasone)-based (12.3%), and ESHAP (etoposide, methylprednisolone, cytarabine, and cisplatin)-based (4.7%) regimens, and 88.7% of patients had received prior anti-CD20 therapy.

Patients received orelabrutinib at 100 mg twice daily (n = 20) or 150 mg once a day (n = 86). All 106 patients were evaluable for safety, and 99 were evaluable for efficacy.

Efficacy

“Orelabrutinib achieved high response and durable remissions,” Dr. Deng said.

The overall response rate was 85.9% in the evaluable efficacy population and 83.5% in the 150-mg dosing arm. The complete response rates were 27.3% and 29.1%, respectively. The median time to response, overall, was 1.9 months.

The median duration of response and median progression-free survival were not reached at a median follow-up of 10.5 months. At 12 months, 74.3% of patients were still in response, and the progression-free survival rate was 64%.

Safety

Most adverse events were grade 1-2 in nature. The most common grade 3 or higher events were platelet count decrease (11.3%), neutrophil count decrease (8.5%), anemia (7.5%), hypertension (3.8%), pneumonia (2.8%), white blood count decrease (1.9%), and hypokalemia (1.9%).

Adverse events of interest included grade 3 or higher hypertension (3.8%), diarrhea (6.6%), and infection (10.4%), as well as secondary malignancy (0.9%, n = 1). There were no cases of grade 3 or higher hemorrhage, grade 3 or higher atrial fibrillation/flutter, or grade 5 treatment-related adverse events.

Dr. Deng noted that rates of grade 3 or higher hemorrhage, atrial fibrillation, diarrhea, and infection, as well as rates of secondary malignancies, have historically been higher with ibrutinib (Blood. 2015 Aug 6;126[6]:739-45; Lancet. 2016 Feb 20;387[10020]:770-8).

“Orelabrutinib has an improved safety profile in patients with relapsed or refractory mantle cell lymphoma,” Dr. Deng said. “The most common adverse events were cytopenia and infections, which are considered mechanism based.”

The study was sponsored by InnoCare Pharma. Dr. Deng reported having no conflicts of interest.

jensmith@mdedge.com

SOURCE: Deng L et al. ASH 2019, Abstract 755.

ORLANDO – A novel Bruton tyrosine kinase inhibitor has produced favorable results in patients with relapsed or refractory mantle cell lymphoma, according to findings presented at the annual meeting of the American Society of Hematology.

Jennifer Smith/MDedge

In a phase 2 trial, orelabrutinib produced an overall response rate of 86% and a 12-month progression-free survival rate of 64%. Safety results with orelabrutinib were superior to historical results with ibrutinib.

The efficacy and safety profile of orelabrutinib, as well as its “convenient” dosing, may make it the “preferred therapeutic choice for B-cell malignancy,” said Lijuan Deng, MD, PhD, of Peking University Cancer Hospital & Institute, Beijing, who presented the phase 2 trial of orelabrutinib at ASH 2019.

The trial enrolled 106 patients with relapsed/refractory mantle cell lymphoma who were treated at 22 centers in China. At baseline, the patients had a median age of 62 years (range, 37-73 years), and 79.2% were men. Most patients (94.4%) had stage III-IV disease.

Prior therapies included CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisolone)-based (69.8%), EPOCH (etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin)-based (22.6%), DHAP (dexamethasone, cytarabine, and cisplatin)-based (22.6%), CVAD (cyclophosphamide, vincristine, doxorubicin, dexamethasone)-based (12.3%), and ESHAP (etoposide, methylprednisolone, cytarabine, and cisplatin)-based (4.7%) regimens, and 88.7% of patients had received prior anti-CD20 therapy.

Patients received orelabrutinib at 100 mg twice daily (n = 20) or 150 mg once a day (n = 86). All 106 patients were evaluable for safety, and 99 were evaluable for efficacy.

Efficacy

“Orelabrutinib achieved high response and durable remissions,” Dr. Deng said.

The overall response rate was 85.9% in the evaluable efficacy population and 83.5% in the 150-mg dosing arm. The complete response rates were 27.3% and 29.1%, respectively. The median time to response, overall, was 1.9 months.

The median duration of response and median progression-free survival were not reached at a median follow-up of 10.5 months. At 12 months, 74.3% of patients were still in response, and the progression-free survival rate was 64%.

Safety

Most adverse events were grade 1-2 in nature. The most common grade 3 or higher events were platelet count decrease (11.3%), neutrophil count decrease (8.5%), anemia (7.5%), hypertension (3.8%), pneumonia (2.8%), white blood count decrease (1.9%), and hypokalemia (1.9%).

Adverse events of interest included grade 3 or higher hypertension (3.8%), diarrhea (6.6%), and infection (10.4%), as well as secondary malignancy (0.9%, n = 1). There were no cases of grade 3 or higher hemorrhage, grade 3 or higher atrial fibrillation/flutter, or grade 5 treatment-related adverse events.

Dr. Deng noted that rates of grade 3 or higher hemorrhage, atrial fibrillation, diarrhea, and infection, as well as rates of secondary malignancies, have historically been higher with ibrutinib (Blood. 2015 Aug 6;126[6]:739-45; Lancet. 2016 Feb 20;387[10020]:770-8).

“Orelabrutinib has an improved safety profile in patients with relapsed or refractory mantle cell lymphoma,” Dr. Deng said. “The most common adverse events were cytopenia and infections, which are considered mechanism based.”

The study was sponsored by InnoCare Pharma. Dr. Deng reported having no conflicts of interest.

jensmith@mdedge.com

SOURCE: Deng L et al. ASH 2019, Abstract 755.

ORLANDO – A novel Bruton tyrosine kinase inhibitor has produced favorable results in patients with relapsed or refractory mantle cell lymphoma, according to findings presented at the annual meeting of the American Society of Hematology.

Jennifer Smith/MDedge

In a phase 2 trial, orelabrutinib produced an overall response rate of 86% and a 12-month progression-free survival rate of 64%. Safety results with orelabrutinib were superior to historical results with ibrutinib.

The efficacy and safety profile of orelabrutinib, as well as its “convenient” dosing, may make it the “preferred therapeutic choice for B-cell malignancy,” said Lijuan Deng, MD, PhD, of Peking University Cancer Hospital & Institute, Beijing, who presented the phase 2 trial of orelabrutinib at ASH 2019.

The trial enrolled 106 patients with relapsed/refractory mantle cell lymphoma who were treated at 22 centers in China. At baseline, the patients had a median age of 62 years (range, 37-73 years), and 79.2% were men. Most patients (94.4%) had stage III-IV disease.

Prior therapies included CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisolone)-based (69.8%), EPOCH (etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin)-based (22.6%), DHAP (dexamethasone, cytarabine, and cisplatin)-based (22.6%), CVAD (cyclophosphamide, vincristine, doxorubicin, dexamethasone)-based (12.3%), and ESHAP (etoposide, methylprednisolone, cytarabine, and cisplatin)-based (4.7%) regimens, and 88.7% of patients had received prior anti-CD20 therapy.

Patients received orelabrutinib at 100 mg twice daily (n = 20) or 150 mg once a day (n = 86). All 106 patients were evaluable for safety, and 99 were evaluable for efficacy.

Efficacy

“Orelabrutinib achieved high response and durable remissions,” Dr. Deng said.

The overall response rate was 85.9% in the evaluable efficacy population and 83.5% in the 150-mg dosing arm. The complete response rates were 27.3% and 29.1%, respectively. The median time to response, overall, was 1.9 months.

The median duration of response and median progression-free survival were not reached at a median follow-up of 10.5 months. At 12 months, 74.3% of patients were still in response, and the progression-free survival rate was 64%.

Safety

Most adverse events were grade 1-2 in nature. The most common grade 3 or higher events were platelet count decrease (11.3%), neutrophil count decrease (8.5%), anemia (7.5%), hypertension (3.8%), pneumonia (2.8%), white blood count decrease (1.9%), and hypokalemia (1.9%).

Adverse events of interest included grade 3 or higher hypertension (3.8%), diarrhea (6.6%), and infection (10.4%), as well as secondary malignancy (0.9%, n = 1). There were no cases of grade 3 or higher hemorrhage, grade 3 or higher atrial fibrillation/flutter, or grade 5 treatment-related adverse events.

Dr. Deng noted that rates of grade 3 or higher hemorrhage, atrial fibrillation, diarrhea, and infection, as well as rates of secondary malignancies, have historically been higher with ibrutinib (Blood. 2015 Aug 6;126[6]:739-45; Lancet. 2016 Feb 20;387[10020]:770-8).

“Orelabrutinib has an improved safety profile in patients with relapsed or refractory mantle cell lymphoma,” Dr. Deng said. “The most common adverse events were cytopenia and infections, which are considered mechanism based.”

The study was sponsored by InnoCare Pharma. Dr. Deng reported having no conflicts of interest.

jensmith@mdedge.com

SOURCE: Deng L et al. ASH 2019, Abstract 755.

ORLANDO – The latest American Society of Hematology guideline on venous thromboembolism (VTE) tackles 30 key questions regarding prophylaxis in hospitalized patients undergoing surgery, according to the chair of the guideline panel, who highlighted 9 of those questions during a special session at the society’s annual meeting.

Andrew D. Bowser/MDedge News

The clinical practice guideline, published just about a week before the annual meeting of the American Society of Hematology, focuses mainly on pharmacologic prophylaxis in specific surgical settings, said David R. Anderson, MD, dean of the faculty of medicine of Dalhousie University, Halifax, N.S.

“Our guidelines focused upon clinically important symptomatic outcomes, with less emphasis being placed on asymptomatic deep vein thrombosis detected by screening tests,” Dr. Anderson said.

At the special education session, Dr. Anderson highlighted several specific recommendations on prophylaxis in surgical patients.

Pharmacologic prophylaxis is not recommended for patients experiencing major trauma deemed to be at high risk of bleeding. Its use does reduce risk of symptomatic pulmonary embolism (PE) and deep vein thrombosis (DVT) by about 10 events per 1,000 patients treated; however, Dr. Anderson said, the panel’s opinion was that this benefit was outweighed by increased risk of major bleeding, at 24 events per 1,000 patients treated.

“We do recommend, however that this risk of bleeding must be reevaluated over the course of recovery of patients, and this may change the decision around this intervention over time,” Dr. Anderson told attendees at the special session.

That’s because pharmacologic prophylaxis is recommended in surgical patients at low to moderate risk of bleeding. In this scenario, the incremental risk of major bleeding (14 events per 1,000 patients treated) is outweighed by the benefit of the reduction of symptomatic VTE events, according to Dr. Anderson.

When pharmacologic prophylaxis is used, the panel recommends combined prophylaxis – mechanical prophylaxis in addition to pharmacologic prophylaxis – especially in those patients at high or very high risk of VTE. Evidence shows that the combination approach significantly reduces risk of PE, and strongly suggests it may also reduce risk of symptomatic proximal DVT, Dr. Anderson said.

In surgical patients not receiving pharmacologic prophylaxis, mechanical prophylaxis is recommended over no mechanical prophylaxis, he added. Moreover, in those patients receiving mechanical prophylaxis, the ASH panel recommends use of intermittent compression devices over graduated compression stockings.

The panel comes out against prophylactic inferior vena cava (IVC) filter insertion in the guidelines. Dr. Anderson said that the “small reduction” in PE risk seen in observational studies is outweighed by increased risk of DVT, and a resulting trend for increased mortality, associated with insertion of the devices.

“We did not consider other risks of IVC filters such as filter embolization or perforation, which again would be complications that would support our recommendation against routine use of these devices in patients undergoing major surgery,” he said.

In terms of the type of pharmacologic prophylaxis to use, the panel said low-molecular-weight heparin or unfractionated heparin would be reasonable choices in this setting. Available data do not demonstrate any significant differences between these choices for major clinical outcomes, Dr. Anderson added.

The guideline also addresses duration of pharmacologic prophylaxis, stating that extended prophylaxis – of at least 3 weeks – is favored over short-term prophylaxis, or up to 2 weeks of treatment. The extended approach significantly reduces risk of symptomatic PE and proximal DVT, though most of the supporting data come from studies of major joint arthroplasty and major general surgical procedures for patients with cancer. “We need more studies in other clinical areas to examine this particular question,” Dr. Anderson said.

The guideline on prophylaxis in surgical patients was published in Blood Advances (2019 Dec 3;3[23]:3898-944). Six other ASH VTE guidelines, all published in 2018, covered prophylaxis in medical patients, diagnosis, VTE in pregnancy, optimal anticoagulation, heparin-induced thrombocytopenia, and pediatric considerations. The guidelines are available on the ASH website.

Dr. Anderson reported having no relevant conflicts of interest.

ORLANDO – The latest American Society of Hematology guideline on venous thromboembolism (VTE) tackles 30 key questions regarding prophylaxis in hospitalized patients undergoing surgery, according to the chair of the guideline panel, who highlighted 9 of those questions during a special session at the society’s annual meeting.

Andrew D. Bowser/MDedge News

The clinical practice guideline, published just about a week before the annual meeting of the American Society of Hematology, focuses mainly on pharmacologic prophylaxis in specific surgical settings, said David R. Anderson, MD, dean of the faculty of medicine of Dalhousie University, Halifax, N.S.

“Our guidelines focused upon clinically important symptomatic outcomes, with less emphasis being placed on asymptomatic deep vein thrombosis detected by screening tests,” Dr. Anderson said.

At the special education session, Dr. Anderson highlighted several specific recommendations on prophylaxis in surgical patients.

Pharmacologic prophylaxis is not recommended for patients experiencing major trauma deemed to be at high risk of bleeding. Its use does reduce risk of symptomatic pulmonary embolism (PE) and deep vein thrombosis (DVT) by about 10 events per 1,000 patients treated; however, Dr. Anderson said, the panel’s opinion was that this benefit was outweighed by increased risk of major bleeding, at 24 events per 1,000 patients treated.

“We do recommend, however that this risk of bleeding must be reevaluated over the course of recovery of patients, and this may change the decision around this intervention over time,” Dr. Anderson told attendees at the special session.

That’s because pharmacologic prophylaxis is recommended in surgical patients at low to moderate risk of bleeding. In this scenario, the incremental risk of major bleeding (14 events per 1,000 patients treated) is outweighed by the benefit of the reduction of symptomatic VTE events, according to Dr. Anderson.

When pharmacologic prophylaxis is used, the panel recommends combined prophylaxis – mechanical prophylaxis in addition to pharmacologic prophylaxis – especially in those patients at high or very high risk of VTE. Evidence shows that the combination approach significantly reduces risk of PE, and strongly suggests it may also reduce risk of symptomatic proximal DVT, Dr. Anderson said.

In surgical patients not receiving pharmacologic prophylaxis, mechanical prophylaxis is recommended over no mechanical prophylaxis, he added. Moreover, in those patients receiving mechanical prophylaxis, the ASH panel recommends use of intermittent compression devices over graduated compression stockings.

The panel comes out against prophylactic inferior vena cava (IVC) filter insertion in the guidelines. Dr. Anderson said that the “small reduction” in PE risk seen in observational studies is outweighed by increased risk of DVT, and a resulting trend for increased mortality, associated with insertion of the devices.

“We did not consider other risks of IVC filters such as filter embolization or perforation, which again would be complications that would support our recommendation against routine use of these devices in patients undergoing major surgery,” he said.

In terms of the type of pharmacologic prophylaxis to use, the panel said low-molecular-weight heparin or unfractionated heparin would be reasonable choices in this setting. Available data do not demonstrate any significant differences between these choices for major clinical outcomes, Dr. Anderson added.

The guideline also addresses duration of pharmacologic prophylaxis, stating that extended prophylaxis – of at least 3 weeks – is favored over short-term prophylaxis, or up to 2 weeks of treatment. The extended approach significantly reduces risk of symptomatic PE and proximal DVT, though most of the supporting data come from studies of major joint arthroplasty and major general surgical procedures for patients with cancer. “We need more studies in other clinical areas to examine this particular question,” Dr. Anderson said.

The guideline on prophylaxis in surgical patients was published in Blood Advances (2019 Dec 3;3[23]:3898-944). Six other ASH VTE guidelines, all published in 2018, covered prophylaxis in medical patients, diagnosis, VTE in pregnancy, optimal anticoagulation, heparin-induced thrombocytopenia, and pediatric considerations. The guidelines are available on the ASH website.

Dr. Anderson reported having no relevant conflicts of interest.

ORLANDO – The latest American Society of Hematology guideline on venous thromboembolism (VTE) tackles 30 key questions regarding prophylaxis in hospitalized patients undergoing surgery, according to the chair of the guideline panel, who highlighted 9 of those questions during a special session at the society’s annual meeting.

Andrew D. Bowser/MDedge News

The clinical practice guideline, published just about a week before the annual meeting of the American Society of Hematology, focuses mainly on pharmacologic prophylaxis in specific surgical settings, said David R. Anderson, MD, dean of the faculty of medicine of Dalhousie University, Halifax, N.S.

“Our guidelines focused upon clinically important symptomatic outcomes, with less emphasis being placed on asymptomatic deep vein thrombosis detected by screening tests,” Dr. Anderson said.

At the special education session, Dr. Anderson highlighted several specific recommendations on prophylaxis in surgical patients.

Pharmacologic prophylaxis is not recommended for patients experiencing major trauma deemed to be at high risk of bleeding. Its use does reduce risk of symptomatic pulmonary embolism (PE) and deep vein thrombosis (DVT) by about 10 events per 1,000 patients treated; however, Dr. Anderson said, the panel’s opinion was that this benefit was outweighed by increased risk of major bleeding, at 24 events per 1,000 patients treated.

“We do recommend, however that this risk of bleeding must be reevaluated over the course of recovery of patients, and this may change the decision around this intervention over time,” Dr. Anderson told attendees at the special session.

That’s because pharmacologic prophylaxis is recommended in surgical patients at low to moderate risk of bleeding. In this scenario, the incremental risk of major bleeding (14 events per 1,000 patients treated) is outweighed by the benefit of the reduction of symptomatic VTE events, according to Dr. Anderson.

When pharmacologic prophylaxis is used, the panel recommends combined prophylaxis – mechanical prophylaxis in addition to pharmacologic prophylaxis – especially in those patients at high or very high risk of VTE. Evidence shows that the combination approach significantly reduces risk of PE, and strongly suggests it may also reduce risk of symptomatic proximal DVT, Dr. Anderson said.

In surgical patients not receiving pharmacologic prophylaxis, mechanical prophylaxis is recommended over no mechanical prophylaxis, he added. Moreover, in those patients receiving mechanical prophylaxis, the ASH panel recommends use of intermittent compression devices over graduated compression stockings.

The panel comes out against prophylactic inferior vena cava (IVC) filter insertion in the guidelines. Dr. Anderson said that the “small reduction” in PE risk seen in observational studies is outweighed by increased risk of DVT, and a resulting trend for increased mortality, associated with insertion of the devices.

“We did not consider other risks of IVC filters such as filter embolization or perforation, which again would be complications that would support our recommendation against routine use of these devices in patients undergoing major surgery,” he said.

In terms of the type of pharmacologic prophylaxis to use, the panel said low-molecular-weight heparin or unfractionated heparin would be reasonable choices in this setting. Available data do not demonstrate any significant differences between these choices for major clinical outcomes, Dr. Anderson added.

The guideline also addresses duration of pharmacologic prophylaxis, stating that extended prophylaxis – of at least 3 weeks – is favored over short-term prophylaxis, or up to 2 weeks of treatment. The extended approach significantly reduces risk of symptomatic PE and proximal DVT, though most of the supporting data come from studies of major joint arthroplasty and major general surgical procedures for patients with cancer. “We need more studies in other clinical areas to examine this particular question,” Dr. Anderson said.

The guideline on prophylaxis in surgical patients was published in Blood Advances (2019 Dec 3;3[23]:3898-944). Six other ASH VTE guidelines, all published in 2018, covered prophylaxis in medical patients, diagnosis, VTE in pregnancy, optimal anticoagulation, heparin-induced thrombocytopenia, and pediatric considerations. The guidelines are available on the ASH website.

Dr. Anderson reported having no relevant conflicts of interest.

ORLANDO – Posttransplant cyclophosphamide may be superior to conventional immunosuppression as graft-versus-host disease prophylaxis, according to findings presented at the annual meeting of the American Society of Hematology.

Jennifer Smith/MDedge News

A phase 3 trial showed that posttransplant cyclophosphamide (PT-Cy) reduced graft-versus-host disease (GVHD) without affecting relapse. Rates of acute and chronic GVHD were significantly lower among patients who received PT-Cy than among those who received conventional immunosuppression (CIS). Rates of progression/relapse, progression-free survival, and overall survival were similar between the PT-Cy and CIS arms.

These results suggest PT-Cy provides a “long-term benefit and positive impact on quality of life” for patients undergoing allogeneic hematopoietic stem cell transplant, according to Annoek E.C. Broers, MD, PhD, of Erasmus Medical Center Cancer Institute in Rotterdam, the Netherlands. Dr. Broers presented the results during the plenary session at ASH 2019.

The trial enrolled 160 patients with leukemias, lymphomas, myelomas, and other hematologic malignancies. All patients had a matched, related donor or an 8/8 or greater matched, unrelated donor.

The patients were randomized to receive CIS (n = 55) or PT-Cy (n = 105) as GVHD prophylaxis. The CIS regimen consisted of cyclosporine A (from day –3 to 180) and mycophenolic acid (from day 0 to 84). Patients in the PT-Cy arm received cyclophosphamide at 50 mg/kg (days 3 and 4) and cyclosporine A (from day 5 to 70).

Baseline characteristics were similar between the treatment arms. The median age was 58 years in the CIS arm and 57 years in the PT-Cy arm. A majority of patients were men – 63% and 67%, respectively.

Two patients in the CIS arm received myeloablative conditioning, but all other patients received reduced-intensity conditioning. Most patients in the CIS arm (67%) and the PT-Cy arm (70%) had a matched, unrelated donor. All patients in the CIS arm and 96% in the PT-Cy arm received peripheral blood cell grafts.

PT-Cy significantly reduced the cumulative incidence of acute and chronic GVHD. The incidence of grade 2-4 acute GVHD at 6 months was 48% in the CIS arm and 32% in the PT-Cy arm (P = .014). The incidence of chronic extensive GVHD at 24 months was 50% and 19%, respectively (P = .001).

There were no significant between-arm differences for any other individual endpoint assessed.

“With a median follow-up of 3.2 years, so far, there’s no difference in the cumulative incidence of progression or relapse, nor is there a difference in progression-free or overall survival,” Dr. Broers said.

At 60 months, the rate of relapse/progression was 32% in the PT-Cy arm and 26% in the CIS arm (P = .36). The rate of nonrelapse mortality was 11% and 14%, respectively (P = .53).

At 60 months, the progression-free survival was 60% in the CIS arm and 58% in the PT-Cy arm (P = .67). The overall survival was 69% and 63%, respectively (P = .63).

In addition to assessing endpoints that “determine the success of our transplant strategy,” Dr. Broers said she and her colleagues also looked at a combined endpoint to account for “the effect GVHD has on morbidity and quality of life.” That endpoint is GVHD- and relapse-free survival.

The researchers found that PT-Cy improved GVHD- and relapse-free survival at 12 months. It was 22% in the CIS arm and 45% in the PT-Cy arm (P = .001). PT-Cy conferred this benefit irrespective of donor type, Dr. Broers noted.

Overall, the incidence of adverse events was somewhat higher in the PT-Cy arm (60%) than in the CIS arm (42%). The incidence of infections also was higher in the PT-Cy arm (41%) than in the CIS arm (21%), and this was largely caused by a greater incidence of neutropenic fever with PT-Cy (25% vs. 15%).

The study was funded by the Dutch Cancer Society, and Novartis provided the mycophenolic acid used in the study. Dr. Broers reported having no conflicts of interest.

jensmith@mdedge.com

SOURCE: Broers AEC et al. ASH 2019, Abstract 1.
 

ORLANDO – Posttransplant cyclophosphamide may be superior to conventional immunosuppression as graft-versus-host disease prophylaxis, according to findings presented at the annual meeting of the American Society of Hematology.

Jennifer Smith/MDedge News

A phase 3 trial showed that posttransplant cyclophosphamide (PT-Cy) reduced graft-versus-host disease (GVHD) without affecting relapse. Rates of acute and chronic GVHD were significantly lower among patients who received PT-Cy than among those who received conventional immunosuppression (CIS). Rates of progression/relapse, progression-free survival, and overall survival were similar between the PT-Cy and CIS arms.

These results suggest PT-Cy provides a “long-term benefit and positive impact on quality of life” for patients undergoing allogeneic hematopoietic stem cell transplant, according to Annoek E.C. Broers, MD, PhD, of Erasmus Medical Center Cancer Institute in Rotterdam, the Netherlands. Dr. Broers presented the results during the plenary session at ASH 2019.

The trial enrolled 160 patients with leukemias, lymphomas, myelomas, and other hematologic malignancies. All patients had a matched, related donor or an 8/8 or greater matched, unrelated donor.

The patients were randomized to receive CIS (n = 55) or PT-Cy (n = 105) as GVHD prophylaxis. The CIS regimen consisted of cyclosporine A (from day –3 to 180) and mycophenolic acid (from day 0 to 84). Patients in the PT-Cy arm received cyclophosphamide at 50 mg/kg (days 3 and 4) and cyclosporine A (from day 5 to 70).

Baseline characteristics were similar between the treatment arms. The median age was 58 years in the CIS arm and 57 years in the PT-Cy arm. A majority of patients were men – 63% and 67%, respectively.

Two patients in the CIS arm received myeloablative conditioning, but all other patients received reduced-intensity conditioning. Most patients in the CIS arm (67%) and the PT-Cy arm (70%) had a matched, unrelated donor. All patients in the CIS arm and 96% in the PT-Cy arm received peripheral blood cell grafts.

PT-Cy significantly reduced the cumulative incidence of acute and chronic GVHD. The incidence of grade 2-4 acute GVHD at 6 months was 48% in the CIS arm and 32% in the PT-Cy arm (P = .014). The incidence of chronic extensive GVHD at 24 months was 50% and 19%, respectively (P = .001).

There were no significant between-arm differences for any other individual endpoint assessed.

“With a median follow-up of 3.2 years, so far, there’s no difference in the cumulative incidence of progression or relapse, nor is there a difference in progression-free or overall survival,” Dr. Broers said.

At 60 months, the rate of relapse/progression was 32% in the PT-Cy arm and 26% in the CIS arm (P = .36). The rate of nonrelapse mortality was 11% and 14%, respectively (P = .53).

At 60 months, the progression-free survival was 60% in the CIS arm and 58% in the PT-Cy arm (P = .67). The overall survival was 69% and 63%, respectively (P = .63).

In addition to assessing endpoints that “determine the success of our transplant strategy,” Dr. Broers said she and her colleagues also looked at a combined endpoint to account for “the effect GVHD has on morbidity and quality of life.” That endpoint is GVHD- and relapse-free survival.

The researchers found that PT-Cy improved GVHD- and relapse-free survival at 12 months. It was 22% in the CIS arm and 45% in the PT-Cy arm (P = .001). PT-Cy conferred this benefit irrespective of donor type, Dr. Broers noted.

Overall, the incidence of adverse events was somewhat higher in the PT-Cy arm (60%) than in the CIS arm (42%). The incidence of infections also was higher in the PT-Cy arm (41%) than in the CIS arm (21%), and this was largely caused by a greater incidence of neutropenic fever with PT-Cy (25% vs. 15%).

The study was funded by the Dutch Cancer Society, and Novartis provided the mycophenolic acid used in the study. Dr. Broers reported having no conflicts of interest.

jensmith@mdedge.com

SOURCE: Broers AEC et al. ASH 2019, Abstract 1.
 

ORLANDO – Posttransplant cyclophosphamide may be superior to conventional immunosuppression as graft-versus-host disease prophylaxis, according to findings presented at the annual meeting of the American Society of Hematology.

Jennifer Smith/MDedge News

A phase 3 trial showed that posttransplant cyclophosphamide (PT-Cy) reduced graft-versus-host disease (GVHD) without affecting relapse. Rates of acute and chronic GVHD were significantly lower among patients who received PT-Cy than among those who received conventional immunosuppression (CIS). Rates of progression/relapse, progression-free survival, and overall survival were similar between the PT-Cy and CIS arms.

These results suggest PT-Cy provides a “long-term benefit and positive impact on quality of life” for patients undergoing allogeneic hematopoietic stem cell transplant, according to Annoek E.C. Broers, MD, PhD, of Erasmus Medical Center Cancer Institute in Rotterdam, the Netherlands. Dr. Broers presented the results during the plenary session at ASH 2019.

The trial enrolled 160 patients with leukemias, lymphomas, myelomas, and other hematologic malignancies. All patients had a matched, related donor or an 8/8 or greater matched, unrelated donor.

The patients were randomized to receive CIS (n = 55) or PT-Cy (n = 105) as GVHD prophylaxis. The CIS regimen consisted of cyclosporine A (from day –3 to 180) and mycophenolic acid (from day 0 to 84). Patients in the PT-Cy arm received cyclophosphamide at 50 mg/kg (days 3 and 4) and cyclosporine A (from day 5 to 70).

Baseline characteristics were similar between the treatment arms. The median age was 58 years in the CIS arm and 57 years in the PT-Cy arm. A majority of patients were men – 63% and 67%, respectively.

Two patients in the CIS arm received myeloablative conditioning, but all other patients received reduced-intensity conditioning. Most patients in the CIS arm (67%) and the PT-Cy arm (70%) had a matched, unrelated donor. All patients in the CIS arm and 96% in the PT-Cy arm received peripheral blood cell grafts.

PT-Cy significantly reduced the cumulative incidence of acute and chronic GVHD. The incidence of grade 2-4 acute GVHD at 6 months was 48% in the CIS arm and 32% in the PT-Cy arm (P = .014). The incidence of chronic extensive GVHD at 24 months was 50% and 19%, respectively (P = .001).

There were no significant between-arm differences for any other individual endpoint assessed.

“With a median follow-up of 3.2 years, so far, there’s no difference in the cumulative incidence of progression or relapse, nor is there a difference in progression-free or overall survival,” Dr. Broers said.

At 60 months, the rate of relapse/progression was 32% in the PT-Cy arm and 26% in the CIS arm (P = .36). The rate of nonrelapse mortality was 11% and 14%, respectively (P = .53).

At 60 months, the progression-free survival was 60% in the CIS arm and 58% in the PT-Cy arm (P = .67). The overall survival was 69% and 63%, respectively (P = .63).

In addition to assessing endpoints that “determine the success of our transplant strategy,” Dr. Broers said she and her colleagues also looked at a combined endpoint to account for “the effect GVHD has on morbidity and quality of life.” That endpoint is GVHD- and relapse-free survival.

The researchers found that PT-Cy improved GVHD- and relapse-free survival at 12 months. It was 22% in the CIS arm and 45% in the PT-Cy arm (P = .001). PT-Cy conferred this benefit irrespective of donor type, Dr. Broers noted.

Overall, the incidence of adverse events was somewhat higher in the PT-Cy arm (60%) than in the CIS arm (42%). The incidence of infections also was higher in the PT-Cy arm (41%) than in the CIS arm (21%), and this was largely caused by a greater incidence of neutropenic fever with PT-Cy (25% vs. 15%).

The study was funded by the Dutch Cancer Society, and Novartis provided the mycophenolic acid used in the study. Dr. Broers reported having no conflicts of interest.

jensmith@mdedge.com

SOURCE: Broers AEC et al. ASH 2019, Abstract 1.
 

ORLANDO – For a patient with chronic lymphocytic leukemia (CLL) who has discontinued venetoclax, choosing the best next therapy may depend on what novel agents the patient was exposed to and why they discontinued them, according to Anthony R. Mato, MD, with the Center for CLL at Memorial Sloan Kettering Cancer Center in New York.

Andrew D. Bowser/MDedge News

If the patient is Bruton tyrosine kinase (BTK) inhibitor naive, then use of a BTK inhibitor after venetoclax would be supported, Dr. Mato said, by the high overall response rates and durable remissions that he and his coinvestigators documented in a retrospective, multicenter study designed specifically to address the gap in knowledge regarding what to use after venetoclax.

If the patient is BTK inhibitor exposed, then the reason for discontinuation needs to be considered before going with that venetoclax-to-BTK inhibitor sequence, Dr. Mato said during an oral presentation at the annual meeting of the American Society of Hematology.

“In patients with resistance to a BTK inhibitor, the sequence was not supported – it did not appear to be effective,” he said. “However, in the setting of intolerance, an alternate BTK inhibitor could be considered.”

The study did not support a venetoclax-to-PI3K inhibitor sequence in PI3K-naive patients, he added, noting that remissions did not appear to be durable, suggesting a potential overlap in resistance mechanisms between agents.

All told, the most effective therapies for in the postvenetoclax setting included the use of a BTK inhibitor in BTK inhibitor–naive or previously responsive patients, and allogeneic transplant following double novel-agent exposure.

“These data may provide support for venetoclax’s earlier use in the course of CLL, and may guide clinical practice and aid in the design of future clinical trials to address sequencing of novel agents,” Dr. Mato told attendees.

While prospective and real-world data clearly show that venetoclax is active in ibrutinib- or idelalisib-exposed patients, data are conversely “variable and limited” with regard to outcomes for next therapies following venetoclax.

“Current data addressing this key sequencing question, I feel, is a major limitation in supporting the sequence of venetoclax to a BTK inhibitor,” Dr. Mato said.

Accordingly, Dr. Mato and colleagues at 31 centers internationally planned and conducted this study, which included data on 326 patients treated with venetoclax who then discontinued for any reason.

“I wanted to highlight that 50% of the sites for this trial were recruited by a single tweet,” said Dr. Mato, adding that he and his coauthors received no funding to conduct this study and volunteered their time to complete it.

They found that, in BTK inhibitor–naive patients who discontinued venetoclax, subsequent BTK inhibitor treatment was associated with a high overall response rate and durable remissions, with a median progression-free survival (PFS) of 32 months.

In BTK inhibitor–exposed patients, response to postvenetoclax BTK inhibitor treatment depended on the reason for discontinuation, with a favorable result (PFS not reached with a mean follow-up of 7.7 months) in patients who were intolerant of the prior BTK inhibitor. By contrast, median PFS was only about 4 months for patients who were resistant to the prior BTK inhibitor.

PI3K inhibitors did not produce durable remissions after venetoclax, with a median PFS also of just 4 months, Dr. Mato reported.

However, cellular therapies appeared to be effective after venetoclax. Allogeneic hematopoietic stem cell transplantation was particularly effective, with the median PFS not reached, while chimeric antigen receptor T-cell therapy produced a PFS of 9 months.

Dr. Mato emphasized that the results of the retrospective trial were “hypothesis generating” and noted that patients in the study had received a median of 3, and up to 11, prior therapies. “This population are probably not our patients receiving venetoclax in clinical practice. They’re more heavily pretreated.”

Dr. Mato reported disclosures related to Gilead, AstraZeneca, AbbVie, Sunesis, Johnson & Johnson, TG Therapeutics, Loxo Oncology, DTRM Biopharma, Genentech, Janssen, Acerta Pharma, Pharmacyclics, and Celgene.

SOURCE: Mato AR et al. ASH 2019, Abstract 502.

ORLANDO – For a patient with chronic lymphocytic leukemia (CLL) who has discontinued venetoclax, choosing the best next therapy may depend on what novel agents the patient was exposed to and why they discontinued them, according to Anthony R. Mato, MD, with the Center for CLL at Memorial Sloan Kettering Cancer Center in New York.

Andrew D. Bowser/MDedge News

If the patient is Bruton tyrosine kinase (BTK) inhibitor naive, then use of a BTK inhibitor after venetoclax would be supported, Dr. Mato said, by the high overall response rates and durable remissions that he and his coinvestigators documented in a retrospective, multicenter study designed specifically to address the gap in knowledge regarding what to use after venetoclax.

If the patient is BTK inhibitor exposed, then the reason for discontinuation needs to be considered before going with that venetoclax-to-BTK inhibitor sequence, Dr. Mato said during an oral presentation at the annual meeting of the American Society of Hematology.

“In patients with resistance to a BTK inhibitor, the sequence was not supported – it did not appear to be effective,” he said. “However, in the setting of intolerance, an alternate BTK inhibitor could be considered.”

The study did not support a venetoclax-to-PI3K inhibitor sequence in PI3K-naive patients, he added, noting that remissions did not appear to be durable, suggesting a potential overlap in resistance mechanisms between agents.

All told, the most effective therapies for in the postvenetoclax setting included the use of a BTK inhibitor in BTK inhibitor–naive or previously responsive patients, and allogeneic transplant following double novel-agent exposure.

“These data may provide support for venetoclax’s earlier use in the course of CLL, and may guide clinical practice and aid in the design of future clinical trials to address sequencing of novel agents,” Dr. Mato told attendees.

While prospective and real-world data clearly show that venetoclax is active in ibrutinib- or idelalisib-exposed patients, data are conversely “variable and limited” with regard to outcomes for next therapies following venetoclax.

“Current data addressing this key sequencing question, I feel, is a major limitation in supporting the sequence of venetoclax to a BTK inhibitor,” Dr. Mato said.

Accordingly, Dr. Mato and colleagues at 31 centers internationally planned and conducted this study, which included data on 326 patients treated with venetoclax who then discontinued for any reason.

“I wanted to highlight that 50% of the sites for this trial were recruited by a single tweet,” said Dr. Mato, adding that he and his coauthors received no funding to conduct this study and volunteered their time to complete it.

They found that, in BTK inhibitor–naive patients who discontinued venetoclax, subsequent BTK inhibitor treatment was associated with a high overall response rate and durable remissions, with a median progression-free survival (PFS) of 32 months.

In BTK inhibitor–exposed patients, response to postvenetoclax BTK inhibitor treatment depended on the reason for discontinuation, with a favorable result (PFS not reached with a mean follow-up of 7.7 months) in patients who were intolerant of the prior BTK inhibitor. By contrast, median PFS was only about 4 months for patients who were resistant to the prior BTK inhibitor.

PI3K inhibitors did not produce durable remissions after venetoclax, with a median PFS also of just 4 months, Dr. Mato reported.

However, cellular therapies appeared to be effective after venetoclax. Allogeneic hematopoietic stem cell transplantation was particularly effective, with the median PFS not reached, while chimeric antigen receptor T-cell therapy produced a PFS of 9 months.

Dr. Mato emphasized that the results of the retrospective trial were “hypothesis generating” and noted that patients in the study had received a median of 3, and up to 11, prior therapies. “This population are probably not our patients receiving venetoclax in clinical practice. They’re more heavily pretreated.”

Dr. Mato reported disclosures related to Gilead, AstraZeneca, AbbVie, Sunesis, Johnson & Johnson, TG Therapeutics, Loxo Oncology, DTRM Biopharma, Genentech, Janssen, Acerta Pharma, Pharmacyclics, and Celgene.

SOURCE: Mato AR et al. ASH 2019, Abstract 502.

ORLANDO – For a patient with chronic lymphocytic leukemia (CLL) who has discontinued venetoclax, choosing the best next therapy may depend on what novel agents the patient was exposed to and why they discontinued them, according to Anthony R. Mato, MD, with the Center for CLL at Memorial Sloan Kettering Cancer Center in New York.

Andrew D. Bowser/MDedge News

If the patient is Bruton tyrosine kinase (BTK) inhibitor naive, then use of a BTK inhibitor after venetoclax would be supported, Dr. Mato said, by the high overall response rates and durable remissions that he and his coinvestigators documented in a retrospective, multicenter study designed specifically to address the gap in knowledge regarding what to use after venetoclax.

If the patient is BTK inhibitor exposed, then the reason for discontinuation needs to be considered before going with that venetoclax-to-BTK inhibitor sequence, Dr. Mato said during an oral presentation at the annual meeting of the American Society of Hematology.

“In patients with resistance to a BTK inhibitor, the sequence was not supported – it did not appear to be effective,” he said. “However, in the setting of intolerance, an alternate BTK inhibitor could be considered.”

The study did not support a venetoclax-to-PI3K inhibitor sequence in PI3K-naive patients, he added, noting that remissions did not appear to be durable, suggesting a potential overlap in resistance mechanisms between agents.

All told, the most effective therapies for in the postvenetoclax setting included the use of a BTK inhibitor in BTK inhibitor–naive or previously responsive patients, and allogeneic transplant following double novel-agent exposure.

“These data may provide support for venetoclax’s earlier use in the course of CLL, and may guide clinical practice and aid in the design of future clinical trials to address sequencing of novel agents,” Dr. Mato told attendees.

While prospective and real-world data clearly show that venetoclax is active in ibrutinib- or idelalisib-exposed patients, data are conversely “variable and limited” with regard to outcomes for next therapies following venetoclax.

“Current data addressing this key sequencing question, I feel, is a major limitation in supporting the sequence of venetoclax to a BTK inhibitor,” Dr. Mato said.

Accordingly, Dr. Mato and colleagues at 31 centers internationally planned and conducted this study, which included data on 326 patients treated with venetoclax who then discontinued for any reason.

“I wanted to highlight that 50% of the sites for this trial were recruited by a single tweet,” said Dr. Mato, adding that he and his coauthors received no funding to conduct this study and volunteered their time to complete it.

They found that, in BTK inhibitor–naive patients who discontinued venetoclax, subsequent BTK inhibitor treatment was associated with a high overall response rate and durable remissions, with a median progression-free survival (PFS) of 32 months.

In BTK inhibitor–exposed patients, response to postvenetoclax BTK inhibitor treatment depended on the reason for discontinuation, with a favorable result (PFS not reached with a mean follow-up of 7.7 months) in patients who were intolerant of the prior BTK inhibitor. By contrast, median PFS was only about 4 months for patients who were resistant to the prior BTK inhibitor.

PI3K inhibitors did not produce durable remissions after venetoclax, with a median PFS also of just 4 months, Dr. Mato reported.

However, cellular therapies appeared to be effective after venetoclax. Allogeneic hematopoietic stem cell transplantation was particularly effective, with the median PFS not reached, while chimeric antigen receptor T-cell therapy produced a PFS of 9 months.

Dr. Mato emphasized that the results of the retrospective trial were “hypothesis generating” and noted that patients in the study had received a median of 3, and up to 11, prior therapies. “This population are probably not our patients receiving venetoclax in clinical practice. They’re more heavily pretreated.”

Dr. Mato reported disclosures related to Gilead, AstraZeneca, AbbVie, Sunesis, Johnson & Johnson, TG Therapeutics, Loxo Oncology, DTRM Biopharma, Genentech, Janssen, Acerta Pharma, Pharmacyclics, and Celgene.

SOURCE: Mato AR et al. ASH 2019, Abstract 502.

ORLANDO – There’s a new Choosing Wisely list in hematology focused specifically on children, with five tests or procedures that experts advise should be avoided, with some exceptions.

The list, which was produced by an expert panel with representatives from the American Society of Hematology and the American Society of Pediatric Hematology/Oncology (ASPHO), includes five tests or procedures that are considered unnecessary. The recommendations were released at the annual meeting of the American Society of Hematology.

The five recommendations are:

• Don’t perform routine preoperative hemostatic testing in an otherwise healthy child with no prior personal or family history of bleeding.
• Don’t transfuse platelets in a nonbleeding pediatric patient with a platelet count greater than 10,000/mcL, unless other signs of bleeding are present, or if the patient is set to undergo an invasive procedure.
• Don’t order thrombophilia testing on children with venous access-associated thrombosis in the absence of a positive family history.
• Don’t transfuse packed RBCs for iron-deficiency anemia in asymptomatic pediatric patients when there is no evidence of hemodynamic instability or active bleeding.
• Don’t routinely administer granulocyte colony–stimulating factor (G-CSF) for empiric treatment of pediatric patients with asymptomatic autoimmune neutropenia in the absence of recurrent or severe bacterial and/or fungal infections.

This is the third Choosing Wisely list produced by ASH. The group released the first list in 2013 and the second in 2014. But officials at both ASH and ASPHO have received feedback over the years that there should also be a pediatric-focused list in hematology, said Sarah O’Brien, MD, of Nationwide Children’s Hospital in Columbus, Ohio, and cochair of the expert panel that put together the recommendations.

Hemostatic testing

The panel recommended against preoperative hemostatic screening in healthy children with no personal or family history of excessive bleeding because the test does not effectively predict who will have unexpected surgical bleeding. The testing could instead identify artifacts or disorders unrelated to bleeding risk, such as factor XII deficiency or an infection-associated, transient lupus anticoagulant, according to Veronica H. Flood, MD, of the Medical College of Wisconsin, Milwaukee, and a member of the expert panel.

Performing this type of testing also adds cost and stress for families, and often delays surgery.

A look at the current literature reveals that there is little evidence to support coagulation testing in healthy children undergoing surgery. “Despite all this evidence, there remain practitioners who perform such screening on a regular basis,” Dr. Flood said.

For physicians concerned about bleeding risk, Dr. Flood said that existing guidelines support taking a bleeding history in preoperative patients. “This may take a little more time, but in the end will result in better results and less expense.”

Platelet transfusion

The panel recommended against platelet transfusion in nonbleeding pediatric patients with hypoproliferative thrombocytopenia and a platelet count greater than 10,000/mcL. The caveats for this recommendation are that it does not apply if there are other signs or symptoms of bleeding, if the patient is undergoing an invasive procedure, if the patient is aged 1 year or younger, or if the patient has immune-mediated thrombocytopenia, according to Rachel Bercovitz, MD, of the Ann & Robert H. Lurie Children’s Hospital of Chicago and a member of the expert panel.

Previous studies on the platelet transfusions in patients with hematologic malignancies have shown that 10,000/mcL is the appropriate threshold, with no difference in bleeding above that number and increased bleeding below it, Dr. Bercovitz said.

Additionally, while platelet transfusion is a safe procedure, Dr. Bercovitz said, it is not without acute and long-term risks.

Cost is also a factor. “Platelets are a limited and expensive resource,” she said.

Thrombophilia testing

Thrombophilia testing in children with a central venous catheter-associated thrombosis was once common practice but should be avoided, explained Leslie J. Raffini, MD, of the Children’s Hospital of Philadelphia and a member of the expert panel.

Thrombophilia does not influence the initial management of a first episode of provoked venous thrombosis, it does not inform the intensity of duration of anticoagulant therapy, and it does not predict recurrence of venous thrombosis in children, Dr. Raffini said.

In the 2013 Choosing Wisely list, ASH made the same recommendation against testing in adult patients with venous thromboembolism occurring in the setting of major transient risk factors. Thrombophilia testing is also expensive, often has to be repeated, and can be misinterpreted, Dr. Raffini said.

Packed RBC transfusion

The panel recommended against transfusion with packed RBCs for children with iron-deficiency anemia who have no symptoms and no evidence of hemodynamic instability or active bleeding. Transfusion is appropriate if children are symptomatic or are hemodynamically unstable, said Patrick T. McGann, MD, of Cincinnati Children’s Hospital and a member of the expert panel.

Rather than jump to transfusion, Dr. McGann said this group of asymptomatic and hemodynamically stable children should be treated for their iron deficiency through oral or intravenous iron. “This is not about ignoring iron deficiency.”

Both are effective treatments with multiple options available, he said. But sending a child to the hospital for transfusion is a costly option that is stressful for families and only provides a temporary solution to the issue, since treatment of the underlying iron deficiency still needs to be addressed, Dr. McGann said.

G-CSF treatment

The panel also recommended against routine administration of G-CSF in children with asymptomatic autoimmune neutropenia. Peter E. Newburger, MD, of Boston Children’s Hospital and a member of the expert guideline panel, said that there is limited evidence available and no published guidelines in this area, so the panel was guided by expert opinion.

In most cases, G-CSF is not necessary because autoimmune neutropenia resolves spontaneously by age 4-5 years and the risk of serious infection is extremely low. Appropriate management includes antibiotics for acute bacterial infection, good dental hygiene, and continued immunizations, Dr. Newburger said.

G-CSF may be appropriate in limited cases to improve quality of life, but it should be started at a low dose of 1-2 mcg/kg.

In cases of serious infection, Dr. Newburger said physicians should consider alternative diagnoses, such as congenital neutropenia or myelodysplastic syndromes.

mschneider@mdedge.com

ORLANDO – There’s a new Choosing Wisely list in hematology focused specifically on children, with five tests or procedures that experts advise should be avoided, with some exceptions.

The list, which was produced by an expert panel with representatives from the American Society of Hematology and the American Society of Pediatric Hematology/Oncology (ASPHO), includes five tests or procedures that are considered unnecessary. The recommendations were released at the annual meeting of the American Society of Hematology.

The five recommendations are:

• Don’t perform routine preoperative hemostatic testing in an otherwise healthy child with no prior personal or family history of bleeding.
• Don’t transfuse platelets in a nonbleeding pediatric patient with a platelet count greater than 10,000/mcL, unless other signs of bleeding are present, or if the patient is set to undergo an invasive procedure.
• Don’t order thrombophilia testing on children with venous access-associated thrombosis in the absence of a positive family history.
• Don’t transfuse packed RBCs for iron-deficiency anemia in asymptomatic pediatric patients when there is no evidence of hemodynamic instability or active bleeding.
• Don’t routinely administer granulocyte colony–stimulating factor (G-CSF) for empiric treatment of pediatric patients with asymptomatic autoimmune neutropenia in the absence of recurrent or severe bacterial and/or fungal infections.

This is the third Choosing Wisely list produced by ASH. The group released the first list in 2013 and the second in 2014. But officials at both ASH and ASPHO have received feedback over the years that there should also be a pediatric-focused list in hematology, said Sarah O’Brien, MD, of Nationwide Children’s Hospital in Columbus, Ohio, and cochair of the expert panel that put together the recommendations.

Hemostatic testing

The panel recommended against preoperative hemostatic screening in healthy children with no personal or family history of excessive bleeding because the test does not effectively predict who will have unexpected surgical bleeding. The testing could instead identify artifacts or disorders unrelated to bleeding risk, such as factor XII deficiency or an infection-associated, transient lupus anticoagulant, according to Veronica H. Flood, MD, of the Medical College of Wisconsin, Milwaukee, and a member of the expert panel.

Performing this type of testing also adds cost and stress for families, and often delays surgery.

A look at the current literature reveals that there is little evidence to support coagulation testing in healthy children undergoing surgery. “Despite all this evidence, there remain practitioners who perform such screening on a regular basis,” Dr. Flood said.

For physicians concerned about bleeding risk, Dr. Flood said that existing guidelines support taking a bleeding history in preoperative patients. “This may take a little more time, but in the end will result in better results and less expense.”

Platelet transfusion

The panel recommended against platelet transfusion in nonbleeding pediatric patients with hypoproliferative thrombocytopenia and a platelet count greater than 10,000/mcL. The caveats for this recommendation are that it does not apply if there are other signs or symptoms of bleeding, if the patient is undergoing an invasive procedure, if the patient is aged 1 year or younger, or if the patient has immune-mediated thrombocytopenia, according to Rachel Bercovitz, MD, of the Ann & Robert H. Lurie Children’s Hospital of Chicago and a member of the expert panel.

Previous studies on the platelet transfusions in patients with hematologic malignancies have shown that 10,000/mcL is the appropriate threshold, with no difference in bleeding above that number and increased bleeding below it, Dr. Bercovitz said.

Additionally, while platelet transfusion is a safe procedure, Dr. Bercovitz said, it is not without acute and long-term risks.

Cost is also a factor. “Platelets are a limited and expensive resource,” she said.

Thrombophilia testing

Thrombophilia testing in children with a central venous catheter-associated thrombosis was once common practice but should be avoided, explained Leslie J. Raffini, MD, of the Children’s Hospital of Philadelphia and a member of the expert panel.

Thrombophilia does not influence the initial management of a first episode of provoked venous thrombosis, it does not inform the intensity of duration of anticoagulant therapy, and it does not predict recurrence of venous thrombosis in children, Dr. Raffini said.

In the 2013 Choosing Wisely list, ASH made the same recommendation against testing in adult patients with venous thromboembolism occurring in the setting of major transient risk factors. Thrombophilia testing is also expensive, often has to be repeated, and can be misinterpreted, Dr. Raffini said.

Packed RBC transfusion

The panel recommended against transfusion with packed RBCs for children with iron-deficiency anemia who have no symptoms and no evidence of hemodynamic instability or active bleeding. Transfusion is appropriate if children are symptomatic or are hemodynamically unstable, said Patrick T. McGann, MD, of Cincinnati Children’s Hospital and a member of the expert panel.

Rather than jump to transfusion, Dr. McGann said this group of asymptomatic and hemodynamically stable children should be treated for their iron deficiency through oral or intravenous iron. “This is not about ignoring iron deficiency.”

Both are effective treatments with multiple options available, he said. But sending a child to the hospital for transfusion is a costly option that is stressful for families and only provides a temporary solution to the issue, since treatment of the underlying iron deficiency still needs to be addressed, Dr. McGann said.

G-CSF treatment

The panel also recommended against routine administration of G-CSF in children with asymptomatic autoimmune neutropenia. Peter E. Newburger, MD, of Boston Children’s Hospital and a member of the expert guideline panel, said that there is limited evidence available and no published guidelines in this area, so the panel was guided by expert opinion.

In most cases, G-CSF is not necessary because autoimmune neutropenia resolves spontaneously by age 4-5 years and the risk of serious infection is extremely low. Appropriate management includes antibiotics for acute bacterial infection, good dental hygiene, and continued immunizations, Dr. Newburger said.

G-CSF may be appropriate in limited cases to improve quality of life, but it should be started at a low dose of 1-2 mcg/kg.

In cases of serious infection, Dr. Newburger said physicians should consider alternative diagnoses, such as congenital neutropenia or myelodysplastic syndromes.

mschneider@mdedge.com

ORLANDO – There’s a new Choosing Wisely list in hematology focused specifically on children, with five tests or procedures that experts advise should be avoided, with some exceptions.

The list, which was produced by an expert panel with representatives from the American Society of Hematology and the American Society of Pediatric Hematology/Oncology (ASPHO), includes five tests or procedures that are considered unnecessary. The recommendations were released at the annual meeting of the American Society of Hematology.

The five recommendations are:

• Don’t perform routine preoperative hemostatic testing in an otherwise healthy child with no prior personal or family history of bleeding.
• Don’t transfuse platelets in a nonbleeding pediatric patient with a platelet count greater than 10,000/mcL, unless other signs of bleeding are present, or if the patient is set to undergo an invasive procedure.
• Don’t order thrombophilia testing on children with venous access-associated thrombosis in the absence of a positive family history.
• Don’t transfuse packed RBCs for iron-deficiency anemia in asymptomatic pediatric patients when there is no evidence of hemodynamic instability or active bleeding.
• Don’t routinely administer granulocyte colony–stimulating factor (G-CSF) for empiric treatment of pediatric patients with asymptomatic autoimmune neutropenia in the absence of recurrent or severe bacterial and/or fungal infections.

This is the third Choosing Wisely list produced by ASH. The group released the first list in 2013 and the second in 2014. But officials at both ASH and ASPHO have received feedback over the years that there should also be a pediatric-focused list in hematology, said Sarah O’Brien, MD, of Nationwide Children’s Hospital in Columbus, Ohio, and cochair of the expert panel that put together the recommendations.

Hemostatic testing

The panel recommended against preoperative hemostatic screening in healthy children with no personal or family history of excessive bleeding because the test does not effectively predict who will have unexpected surgical bleeding. The testing could instead identify artifacts or disorders unrelated to bleeding risk, such as factor XII deficiency or an infection-associated, transient lupus anticoagulant, according to Veronica H. Flood, MD, of the Medical College of Wisconsin, Milwaukee, and a member of the expert panel.

Performing this type of testing also adds cost and stress for families, and often delays surgery.

A look at the current literature reveals that there is little evidence to support coagulation testing in healthy children undergoing surgery. “Despite all this evidence, there remain practitioners who perform such screening on a regular basis,” Dr. Flood said.

For physicians concerned about bleeding risk, Dr. Flood said that existing guidelines support taking a bleeding history in preoperative patients. “This may take a little more time, but in the end will result in better results and less expense.”

Platelet transfusion

The panel recommended against platelet transfusion in nonbleeding pediatric patients with hypoproliferative thrombocytopenia and a platelet count greater than 10,000/mcL. The caveats for this recommendation are that it does not apply if there are other signs or symptoms of bleeding, if the patient is undergoing an invasive procedure, if the patient is aged 1 year or younger, or if the patient has immune-mediated thrombocytopenia, according to Rachel Bercovitz, MD, of the Ann & Robert H. Lurie Children’s Hospital of Chicago and a member of the expert panel.

Previous studies on the platelet transfusions in patients with hematologic malignancies have shown that 10,000/mcL is the appropriate threshold, with no difference in bleeding above that number and increased bleeding below it, Dr. Bercovitz said.

Additionally, while platelet transfusion is a safe procedure, Dr. Bercovitz said, it is not without acute and long-term risks.

Cost is also a factor. “Platelets are a limited and expensive resource,” she said.

Thrombophilia testing

Thrombophilia testing in children with a central venous catheter-associated thrombosis was once common practice but should be avoided, explained Leslie J. Raffini, MD, of the Children’s Hospital of Philadelphia and a member of the expert panel.

Thrombophilia does not influence the initial management of a first episode of provoked venous thrombosis, it does not inform the intensity of duration of anticoagulant therapy, and it does not predict recurrence of venous thrombosis in children, Dr. Raffini said.

In the 2013 Choosing Wisely list, ASH made the same recommendation against testing in adult patients with venous thromboembolism occurring in the setting of major transient risk factors. Thrombophilia testing is also expensive, often has to be repeated, and can be misinterpreted, Dr. Raffini said.

Packed RBC transfusion

The panel recommended against transfusion with packed RBCs for children with iron-deficiency anemia who have no symptoms and no evidence of hemodynamic instability or active bleeding. Transfusion is appropriate if children are symptomatic or are hemodynamically unstable, said Patrick T. McGann, MD, of Cincinnati Children’s Hospital and a member of the expert panel.

Rather than jump to transfusion, Dr. McGann said this group of asymptomatic and hemodynamically stable children should be treated for their iron deficiency through oral or intravenous iron. “This is not about ignoring iron deficiency.”

Both are effective treatments with multiple options available, he said. But sending a child to the hospital for transfusion is a costly option that is stressful for families and only provides a temporary solution to the issue, since treatment of the underlying iron deficiency still needs to be addressed, Dr. McGann said.

G-CSF treatment

The panel also recommended against routine administration of G-CSF in children with asymptomatic autoimmune neutropenia. Peter E. Newburger, MD, of Boston Children’s Hospital and a member of the expert guideline panel, said that there is limited evidence available and no published guidelines in this area, so the panel was guided by expert opinion.

In most cases, G-CSF is not necessary because autoimmune neutropenia resolves spontaneously by age 4-5 years and the risk of serious infection is extremely low. Appropriate management includes antibiotics for acute bacterial infection, good dental hygiene, and continued immunizations, Dr. Newburger said.

G-CSF may be appropriate in limited cases to improve quality of life, but it should be started at a low dose of 1-2 mcg/kg.

In cases of serious infection, Dr. Newburger said physicians should consider alternative diagnoses, such as congenital neutropenia or myelodysplastic syndromes.

mschneider@mdedge.com

ORLANDO – Oral arginine supplementation significantly increased plasma arginine levels and improved acute pain-related outcomes in Nigerian children with sickle cell disease in a randomized, placebo-controlled, phase 2 trial.

Andrew Bowser/MDedge News

Of 68 children with a mean age of 10 years who were hospitalized with vaso-occlusive crisis involving severe pain and treated with standard pain management, 35 were randomized to receive adjuvant oral L-arginine at a dose of 100 mg/kg every 8 hours for 5 days or until discharge, and 33 received placebo. Those in the arginine arm experienced a 125% increase in their plasma arginine level, compared with a 29% increase in the placebo arm, Richard Onalo, FC Paed, reported during a press briefing at the annual meeting of the American Society of Hematology.

“This was statistically significant,” Dr. Onalo, of the department of pediatrics at the University of Abuja, Nigeria, said of the difference between the two arms. “Also, the global bioavailability ratio increased by 59% in the arginine arm.”

Low plasma arginine levels are associated with acute pain requiring hospitalization in Nigerian children with sickle cell disease, and have also been shown in a prior study in the United States to predict pediatric vaso-occlusion, Dr. Onalo said, adding that arginine supplementation, which has known opioid-sparing effects, was found in another phase 2, randomized, placebo-controlled U.S. study to significantly decrease pain scores.

In the current study, the increase in arginine bioavailability inversely correlated with Medication Quantification Scale scores, which were 73 vs. 120 in the arginine and placebo arms, respectively (r = -0.35; P = .02), indicating reduced analgesic use in the arginine arm, he said.

“Clinically, the patients in the arginine arm also tended to have a faster resolution in their pain score,” he said.

Despite similar baseline Numerical Pain Scale (PS) scores (8.7 and 8.4 on a 0-10 scale), day 5 pain scores were 1.2 vs. 2.0, and the mean daily rate of decline was 1.5 vs. 1.1 cm/day.

Crisis resolution was achieved by 25% of the patients in the arginine arm in about 72 hours, compared with about 120 hours in the placebo arms.

“By day 5, 54% of patients on arginine were already home, as compared with just 24% in the placebo arm, and this was found to be clinically and statistically significant,” Dr. Onalo said, noting that mean hospital length of stay was 110 hours vs. 156 hours in the arginine and placebo arms, respectively.

A non–statistically significant decrease in mean total opioid dose was also observed in the arginine vs. placebo arms (3.8 vs 5.1 mg/kg; P = .11).

Arginine supplementation in this study was safe; no serious treatment-related adverse events occurred, and there were no significant differences between the groups in the incidence of adverse events. Dr. Onalo noted, however, that a trend toward more vomiting was observed in the arginine versus the placebo arm (20% vs. 3%, P = .07).

Severe vaso-occlusive pain episodes are a major cause of morbidity and mortality in sickle cell disease, and based on the prior findings – and the lack of data regarding the role of arginine for treating acute sickle cell-related vaso-occlusive pain episodes in sub-Saharan Africa – Dr. Onalo and colleagues set out to assess its role in that setting.

“Also, we are interested in finding a molecule that can be used easily by the patient at home, and also can be [self-administered],” he said.

Children enrolled in the double-blind study had a severe vaso-occlusive pain episode, defined by a PS score of at least 7 on a scale of 0-10, at one of two major hospitals in Abuja, Nigeria. All patients received pain management, including opioid and nonopioid analgesics, per institutional practice.

The findings reinforce the role of arginine in vaso-occlusive pain episodes, and suggest that oral arginine is a promising adjuvant therapy for vaso-occlusive crisis management in patients with sickle cell disease, he said.

“We recommend a phase 3 multicenter clinical trial,” he added.

As for a potential role for arginine in this setting in the United States, prevention trials in the U.S. have thus far been negative, said Julie Panepinto, MD, the press briefing moderator and a pediatric hematologist-oncologist at Children’s Hospital of Wisconsin, Milwaukee.

Sharon Worcester/MDedge News

“This is my first knowledge of use in the acute setting,” said Dr. Panepinto, also a professor at the Medical College of Wisconsin in Milwaukee. “There is going to be some future work looking at use of arginine in the U.S. for patients presenting with pain.”

For now, however, it’s too early to say that all patients should be started on arginine, she said, adding that more information is needed, including about appropriate dosing.

Nonetheless, it’s encouraging to see positive findings, she noted.

“We’ve been looking at and thinking about arginine for a long time, so I think this is a really exciting study ... that should lead us to future work to really understand better how to use the medication,” she said.

Dr. Onalo reported having no disclosures. Dr. Panepinto has received research funding from the National Institutes of Health and the Health Resources and Services Administration.

sworcester@mdedge.com

SOURCE: Onalo R et al. ASH 2019, Abstract 613.

ORLANDO – Oral arginine supplementation significantly increased plasma arginine levels and improved acute pain-related outcomes in Nigerian children with sickle cell disease in a randomized, placebo-controlled, phase 2 trial.

Andrew Bowser/MDedge News

Of 68 children with a mean age of 10 years who were hospitalized with vaso-occlusive crisis involving severe pain and treated with standard pain management, 35 were randomized to receive adjuvant oral L-arginine at a dose of 100 mg/kg every 8 hours for 5 days or until discharge, and 33 received placebo. Those in the arginine arm experienced a 125% increase in their plasma arginine level, compared with a 29% increase in the placebo arm, Richard Onalo, FC Paed, reported during a press briefing at the annual meeting of the American Society of Hematology.

“This was statistically significant,” Dr. Onalo, of the department of pediatrics at the University of Abuja, Nigeria, said of the difference between the two arms. “Also, the global bioavailability ratio increased by 59% in the arginine arm.”

Low plasma arginine levels are associated with acute pain requiring hospitalization in Nigerian children with sickle cell disease, and have also been shown in a prior study in the United States to predict pediatric vaso-occlusion, Dr. Onalo said, adding that arginine supplementation, which has known opioid-sparing effects, was found in another phase 2, randomized, placebo-controlled U.S. study to significantly decrease pain scores.

In the current study, the increase in arginine bioavailability inversely correlated with Medication Quantification Scale scores, which were 73 vs. 120 in the arginine and placebo arms, respectively (r = -0.35; P = .02), indicating reduced analgesic use in the arginine arm, he said.

“Clinically, the patients in the arginine arm also tended to have a faster resolution in their pain score,” he said.

Despite similar baseline Numerical Pain Scale (PS) scores (8.7 and 8.4 on a 0-10 scale), day 5 pain scores were 1.2 vs. 2.0, and the mean daily rate of decline was 1.5 vs. 1.1 cm/day.

Crisis resolution was achieved by 25% of the patients in the arginine arm in about 72 hours, compared with about 120 hours in the placebo arms.

“By day 5, 54% of patients on arginine were already home, as compared with just 24% in the placebo arm, and this was found to be clinically and statistically significant,” Dr. Onalo said, noting that mean hospital length of stay was 110 hours vs. 156 hours in the arginine and placebo arms, respectively.

A non–statistically significant decrease in mean total opioid dose was also observed in the arginine vs. placebo arms (3.8 vs 5.1 mg/kg; P = .11).

Arginine supplementation in this study was safe; no serious treatment-related adverse events occurred, and there were no significant differences between the groups in the incidence of adverse events. Dr. Onalo noted, however, that a trend toward more vomiting was observed in the arginine versus the placebo arm (20% vs. 3%, P = .07).

Severe vaso-occlusive pain episodes are a major cause of morbidity and mortality in sickle cell disease, and based on the prior findings – and the lack of data regarding the role of arginine for treating acute sickle cell-related vaso-occlusive pain episodes in sub-Saharan Africa – Dr. Onalo and colleagues set out to assess its role in that setting.

“Also, we are interested in finding a molecule that can be used easily by the patient at home, and also can be [self-administered],” he said.

Children enrolled in the double-blind study had a severe vaso-occlusive pain episode, defined by a PS score of at least 7 on a scale of 0-10, at one of two major hospitals in Abuja, Nigeria. All patients received pain management, including opioid and nonopioid analgesics, per institutional practice.

The findings reinforce the role of arginine in vaso-occlusive pain episodes, and suggest that oral arginine is a promising adjuvant therapy for vaso-occlusive crisis management in patients with sickle cell disease, he said.

“We recommend a phase 3 multicenter clinical trial,” he added.

As for a potential role for arginine in this setting in the United States, prevention trials in the U.S. have thus far been negative, said Julie Panepinto, MD, the press briefing moderator and a pediatric hematologist-oncologist at Children’s Hospital of Wisconsin, Milwaukee.

Sharon Worcester/MDedge News

“This is my first knowledge of use in the acute setting,” said Dr. Panepinto, also a professor at the Medical College of Wisconsin in Milwaukee. “There is going to be some future work looking at use of arginine in the U.S. for patients presenting with pain.”

For now, however, it’s too early to say that all patients should be started on arginine, she said, adding that more information is needed, including about appropriate dosing.

Nonetheless, it’s encouraging to see positive findings, she noted.

“We’ve been looking at and thinking about arginine for a long time, so I think this is a really exciting study ... that should lead us to future work to really understand better how to use the medication,” she said.

Dr. Onalo reported having no disclosures. Dr. Panepinto has received research funding from the National Institutes of Health and the Health Resources and Services Administration.

sworcester@mdedge.com

SOURCE: Onalo R et al. ASH 2019, Abstract 613.

ORLANDO – Oral arginine supplementation significantly increased plasma arginine levels and improved acute pain-related outcomes in Nigerian children with sickle cell disease in a randomized, placebo-controlled, phase 2 trial.

Andrew Bowser/MDedge News

Of 68 children with a mean age of 10 years who were hospitalized with vaso-occlusive crisis involving severe pain and treated with standard pain management, 35 were randomized to receive adjuvant oral L-arginine at a dose of 100 mg/kg every 8 hours for 5 days or until discharge, and 33 received placebo. Those in the arginine arm experienced a 125% increase in their plasma arginine level, compared with a 29% increase in the placebo arm, Richard Onalo, FC Paed, reported during a press briefing at the annual meeting of the American Society of Hematology.

“This was statistically significant,” Dr. Onalo, of the department of pediatrics at the University of Abuja, Nigeria, said of the difference between the two arms. “Also, the global bioavailability ratio increased by 59% in the arginine arm.”

Low plasma arginine levels are associated with acute pain requiring hospitalization in Nigerian children with sickle cell disease, and have also been shown in a prior study in the United States to predict pediatric vaso-occlusion, Dr. Onalo said, adding that arginine supplementation, which has known opioid-sparing effects, was found in another phase 2, randomized, placebo-controlled U.S. study to significantly decrease pain scores.

In the current study, the increase in arginine bioavailability inversely correlated with Medication Quantification Scale scores, which were 73 vs. 120 in the arginine and placebo arms, respectively (r = -0.35; P = .02), indicating reduced analgesic use in the arginine arm, he said.

“Clinically, the patients in the arginine arm also tended to have a faster resolution in their pain score,” he said.

Despite similar baseline Numerical Pain Scale (PS) scores (8.7 and 8.4 on a 0-10 scale), day 5 pain scores were 1.2 vs. 2.0, and the mean daily rate of decline was 1.5 vs. 1.1 cm/day.

Crisis resolution was achieved by 25% of the patients in the arginine arm in about 72 hours, compared with about 120 hours in the placebo arms.

“By day 5, 54% of patients on arginine were already home, as compared with just 24% in the placebo arm, and this was found to be clinically and statistically significant,” Dr. Onalo said, noting that mean hospital length of stay was 110 hours vs. 156 hours in the arginine and placebo arms, respectively.

A non–statistically significant decrease in mean total opioid dose was also observed in the arginine vs. placebo arms (3.8 vs 5.1 mg/kg; P = .11).

Arginine supplementation in this study was safe; no serious treatment-related adverse events occurred, and there were no significant differences between the groups in the incidence of adverse events. Dr. Onalo noted, however, that a trend toward more vomiting was observed in the arginine versus the placebo arm (20% vs. 3%, P = .07).

Severe vaso-occlusive pain episodes are a major cause of morbidity and mortality in sickle cell disease, and based on the prior findings – and the lack of data regarding the role of arginine for treating acute sickle cell-related vaso-occlusive pain episodes in sub-Saharan Africa – Dr. Onalo and colleagues set out to assess its role in that setting.

“Also, we are interested in finding a molecule that can be used easily by the patient at home, and also can be [self-administered],” he said.

Children enrolled in the double-blind study had a severe vaso-occlusive pain episode, defined by a PS score of at least 7 on a scale of 0-10, at one of two major hospitals in Abuja, Nigeria. All patients received pain management, including opioid and nonopioid analgesics, per institutional practice.

The findings reinforce the role of arginine in vaso-occlusive pain episodes, and suggest that oral arginine is a promising adjuvant therapy for vaso-occlusive crisis management in patients with sickle cell disease, he said.

“We recommend a phase 3 multicenter clinical trial,” he added.

As for a potential role for arginine in this setting in the United States, prevention trials in the U.S. have thus far been negative, said Julie Panepinto, MD, the press briefing moderator and a pediatric hematologist-oncologist at Children’s Hospital of Wisconsin, Milwaukee.

Sharon Worcester/MDedge News

“This is my first knowledge of use in the acute setting,” said Dr. Panepinto, also a professor at the Medical College of Wisconsin in Milwaukee. “There is going to be some future work looking at use of arginine in the U.S. for patients presenting with pain.”

For now, however, it’s too early to say that all patients should be started on arginine, she said, adding that more information is needed, including about appropriate dosing.

Nonetheless, it’s encouraging to see positive findings, she noted.

“We’ve been looking at and thinking about arginine for a long time, so I think this is a really exciting study ... that should lead us to future work to really understand better how to use the medication,” she said.

Dr. Onalo reported having no disclosures. Dr. Panepinto has received research funding from the National Institutes of Health and the Health Resources and Services Administration.

sworcester@mdedge.com

SOURCE: Onalo R et al. ASH 2019, Abstract 613.

ORLANDO – Preclinical research suggests nuclear factor I X is a fetal hemoglobin repressor, a finding that could have implications for the treatment of sickle cell disease.

Researchers found that knocking down nuclear factor I X (NFIX) in adult erythroblasts induced fetal hemoglobin expression in a vast majority of cells, and the total amount of fetal hemoglobin in those cells was about 40%. The target level of fetal hemoglobin for sickle cell patients to become asymptomatic is 30%, according to study investigator Jeffrey R. Shearstone, PhD, of Syros Pharmaceuticals in Cambridge, Mass. He made these remarks during a press conference at the annual meeting of the American Society of Hematology. Mudit Chaand, PhD, also of Syros, is scheduled to present the study at the meeting on Dec. 9, 2019.

“While this is obviously a preclinical, investigational study, to see levels of induction in primary cells and cell lines of 40% is very encouraging and shows that [NFIX] is a very potent fetal hemoglobin repressor,” Dr. Shearstone said. “We see this discovery as, potentially, a new avenue for therapeutic intervention in sickle cell disease, but there’s still a lot of work to be done.”

Syros researchers began this study by comparing erythroblasts derived from cord blood, which have high levels of fetal hemoglobin, and erythroblasts derived from bone marrow, which have low levels of fetal hemoglobin. The team’s goal was to identify transcription factors that might regulate the repression of fetal hemoglobin in adult cells.

Chromatin accessibility mapping pointed to NFIX as a hemoglobin repressor. The researchers observed increased accessibility at the NFIX promoter and elevated NFIX messenger RNA in adult cells.

To confirm NFIX’s role as a repressor of fetal hemoglobin, the researchers used short hairpin RNA to knock down NFIX in primary erythroblasts and cell lines.

“By knocking down NFIX, we saw a very robust induction of fetal hemoglobin,” Dr. Shearstone said. “We saw nearly 100% of cells in which NFIX was knocked down express fetal hemoglobin. This level of induction compared very favorably to probably the two most potent known repressors of fetal hemoglobin, ZBTB7A and BCL11A.”

Specifically, 86%-97% of cells with NFIX knockdown expressed fetal hemoglobin, compared with 16% of control cells, 88% of cells with BCL11A knockdown, and 91% of cells with ZBTB7A knockdown.

The total amount of fetal hemoglobin in erythroblasts with NFIX knockdown was 39%-40%.

The researchers plan to conduct additional studies to validate these results, examine how NFIX directly binds at the fetal globin promoter, determine if NFIX interacts with any previously identified fetal hemoglobin repressors, and investigate how NFIX can be shut down in patients with sickle cell disease. The researchers’ ultimate goal is to develop a small molecule that would target NFIX.

All researchers involved in this work are employees of Syros Pharmaceuticals.

jensmith@mdedge.com

SOURCE: Shearstone JR et al. ASH 2019, Abstract 821.

ORLANDO – Preclinical research suggests nuclear factor I X is a fetal hemoglobin repressor, a finding that could have implications for the treatment of sickle cell disease.

Researchers found that knocking down nuclear factor I X (NFIX) in adult erythroblasts induced fetal hemoglobin expression in a vast majority of cells, and the total amount of fetal hemoglobin in those cells was about 40%. The target level of fetal hemoglobin for sickle cell patients to become asymptomatic is 30%, according to study investigator Jeffrey R. Shearstone, PhD, of Syros Pharmaceuticals in Cambridge, Mass. He made these remarks during a press conference at the annual meeting of the American Society of Hematology. Mudit Chaand, PhD, also of Syros, is scheduled to present the study at the meeting on Dec. 9, 2019.

“While this is obviously a preclinical, investigational study, to see levels of induction in primary cells and cell lines of 40% is very encouraging and shows that [NFIX] is a very potent fetal hemoglobin repressor,” Dr. Shearstone said. “We see this discovery as, potentially, a new avenue for therapeutic intervention in sickle cell disease, but there’s still a lot of work to be done.”

Syros researchers began this study by comparing erythroblasts derived from cord blood, which have high levels of fetal hemoglobin, and erythroblasts derived from bone marrow, which have low levels of fetal hemoglobin. The team’s goal was to identify transcription factors that might regulate the repression of fetal hemoglobin in adult cells.

Chromatin accessibility mapping pointed to NFIX as a hemoglobin repressor. The researchers observed increased accessibility at the NFIX promoter and elevated NFIX messenger RNA in adult cells.

To confirm NFIX’s role as a repressor of fetal hemoglobin, the researchers used short hairpin RNA to knock down NFIX in primary erythroblasts and cell lines.

“By knocking down NFIX, we saw a very robust induction of fetal hemoglobin,” Dr. Shearstone said. “We saw nearly 100% of cells in which NFIX was knocked down express fetal hemoglobin. This level of induction compared very favorably to probably the two most potent known repressors of fetal hemoglobin, ZBTB7A and BCL11A.”

Specifically, 86%-97% of cells with NFIX knockdown expressed fetal hemoglobin, compared with 16% of control cells, 88% of cells with BCL11A knockdown, and 91% of cells with ZBTB7A knockdown.

The total amount of fetal hemoglobin in erythroblasts with NFIX knockdown was 39%-40%.

The researchers plan to conduct additional studies to validate these results, examine how NFIX directly binds at the fetal globin promoter, determine if NFIX interacts with any previously identified fetal hemoglobin repressors, and investigate how NFIX can be shut down in patients with sickle cell disease. The researchers’ ultimate goal is to develop a small molecule that would target NFIX.

All researchers involved in this work are employees of Syros Pharmaceuticals.

jensmith@mdedge.com

SOURCE: Shearstone JR et al. ASH 2019, Abstract 821.

ORLANDO – Preclinical research suggests nuclear factor I X is a fetal hemoglobin repressor, a finding that could have implications for the treatment of sickle cell disease.

Researchers found that knocking down nuclear factor I X (NFIX) in adult erythroblasts induced fetal hemoglobin expression in a vast majority of cells, and the total amount of fetal hemoglobin in those cells was about 40%. The target level of fetal hemoglobin for sickle cell patients to become asymptomatic is 30%, according to study investigator Jeffrey R. Shearstone, PhD, of Syros Pharmaceuticals in Cambridge, Mass. He made these remarks during a press conference at the annual meeting of the American Society of Hematology. Mudit Chaand, PhD, also of Syros, is scheduled to present the study at the meeting on Dec. 9, 2019.

“While this is obviously a preclinical, investigational study, to see levels of induction in primary cells and cell lines of 40% is very encouraging and shows that [NFIX] is a very potent fetal hemoglobin repressor,” Dr. Shearstone said. “We see this discovery as, potentially, a new avenue for therapeutic intervention in sickle cell disease, but there’s still a lot of work to be done.”

Syros researchers began this study by comparing erythroblasts derived from cord blood, which have high levels of fetal hemoglobin, and erythroblasts derived from bone marrow, which have low levels of fetal hemoglobin. The team’s goal was to identify transcription factors that might regulate the repression of fetal hemoglobin in adult cells.

Chromatin accessibility mapping pointed to NFIX as a hemoglobin repressor. The researchers observed increased accessibility at the NFIX promoter and elevated NFIX messenger RNA in adult cells.

To confirm NFIX’s role as a repressor of fetal hemoglobin, the researchers used short hairpin RNA to knock down NFIX in primary erythroblasts and cell lines.

“By knocking down NFIX, we saw a very robust induction of fetal hemoglobin,” Dr. Shearstone said. “We saw nearly 100% of cells in which NFIX was knocked down express fetal hemoglobin. This level of induction compared very favorably to probably the two most potent known repressors of fetal hemoglobin, ZBTB7A and BCL11A.”

Specifically, 86%-97% of cells with NFIX knockdown expressed fetal hemoglobin, compared with 16% of control cells, 88% of cells with BCL11A knockdown, and 91% of cells with ZBTB7A knockdown.

The total amount of fetal hemoglobin in erythroblasts with NFIX knockdown was 39%-40%.

The researchers plan to conduct additional studies to validate these results, examine how NFIX directly binds at the fetal globin promoter, determine if NFIX interacts with any previously identified fetal hemoglobin repressors, and investigate how NFIX can be shut down in patients with sickle cell disease. The researchers’ ultimate goal is to develop a small molecule that would target NFIX.

All researchers involved in this work are employees of Syros Pharmaceuticals.

jensmith@mdedge.com

SOURCE: Shearstone JR et al. ASH 2019, Abstract 821.

ORLANDO – There is an urgent need for new therapies to treat relapsed or refractory peripheral T-cell lymphoma, but results of a phase 2 study suggest that monotherapy with the immune checkpoint inhibitor nivolumab (Opdivo) is not the hoped-for salvage treatment.

Neil Osterweil/MDedge News

An interim analysis of data on 12 patients with peripheral T-cell lymphoma (PTCL) treated with nivolumab monotherapy showed an overall response rate of 33%, consisting of 2 complete responses and 2 partial responses. But the responses were short lived, and one patient had hyperprogressive disease – dramatic progression within one cycle of treatment – while two more had progression within two cycles, leading to a trial halt, reported N. Nora Bennani, MD, from the Mayo Clinic in Rochester, Minn.

“These findings likely reflect the distinct biology of PTCL and should be considered when designing future studies using checkpoint inhibitors in these diseases,” she said at the annual meeting of the American Society of Hematology.

The rationale for using an immune checkpoint inhibitor directed against the programmed death–1 protein and its ligands (PD and PD-L1/2) is that malignant cells in PTCL induce a profoundly immunosuppressive tumor microenvironment. Checkpoint inhibitors have shown strong activity against relapsed Hodgkin lymphoma, and the Mayo Clinic researchers speculated that an anti-PD-1 agent could have a similar effect in PTCL.

They had originally planned to enroll 29 patients into a phase 2 trial with nivolumab delivered 240 mg every 2 weeks for eight cycles, followed by a dose of 480 mg given every 4 weeks until disease progression or intolerable toxicities.

Patients were eligible if they had biopsy-confirmed relapsed or refractory PTCL, measurable disease on cross-sectional imaging of at least 1.5 cm, and prior systemic chemoimmunotherapy and/or autologous stem cell transplantation.

The interim analysis included 12 patients who received at least one dose of nivolumab. Of the 12 patients, 6 had angioimmunoblastic T-cell lymphoma (AITL), 3 had PTCL not otherwise specified, and 1 each had ALK-negative anaplastic large cell lymphoma (ALK-ALCL), enteropathy-associated T-cell lymphoma (EATL), or hepatosplenic gamma/delta T-cell lymphoma.

All patients had Ann Arbor stage III/IV disease, and 11 had extranodal involvement.

As noted, there were 4 responses among the 12 patients, consisting of 1 complete response in the patient with ALK-ALCL and 1 in a patient with AITL, and 2 partial responses – 1 in a patient with PTCL-NOS, and 1 in the patient with EATL.

The median progression-free survival for all 12 patients was short at 2.7 months, and the median overall survival was estimated at 6.7 months.

“It was staggering to see this: The duration of response was significantly short, less than 2 months,” Dr. Bennani said.

Nonhematologic toxicities were seen in 5 of the 12 patients (42%), and hematologic adverse events occurred in 3 (25%). All patients are now off treatment, 10 because of disease progression, 1 because of acute pancreatitis, and the aforementioned patient with hyperprogressive disease.

The patient with hyperprogressive disease had significant progression in tonsillar and cervical lymphadenopathy within 7-10 days of nivolumab infusion, with biopsy-proven AITL in the involved nodes.

“I believe that, in this patient population, combination therapies will be key. I think checkpoint blockers alone are not going to be sufficient to see meaningful outcomes in these patients,” Dr. Bennani said in an interview.

“An overall response rate of 33% is significant, because most other agents that were FDA approved in this patient population have response rates around 30%,” she said, adding that it’s possible that the patients with rapid progression had disease too advanced to be effectively treated with a checkpoint inhibitor.

“Ideally however, if we want to move forward, it will need to be with combinations of checkpoint inhibitors with HDAC [histone deacetylase] inhibitors, hypomethylating agents, or even PI3 kinase inhibitors,” she said.

­The study was supported by Bristol-Myers Squibb. Dr. Bennani reported research funding and advisory board activities for Bristol-Myers Squibb and others.

SOURCE: Bennani NN et al. ASH 2019, Abstract 467.

ORLANDO – There is an urgent need for new therapies to treat relapsed or refractory peripheral T-cell lymphoma, but results of a phase 2 study suggest that monotherapy with the immune checkpoint inhibitor nivolumab (Opdivo) is not the hoped-for salvage treatment.

Neil Osterweil/MDedge News

An interim analysis of data on 12 patients with peripheral T-cell lymphoma (PTCL) treated with nivolumab monotherapy showed an overall response rate of 33%, consisting of 2 complete responses and 2 partial responses. But the responses were short lived, and one patient had hyperprogressive disease – dramatic progression within one cycle of treatment – while two more had progression within two cycles, leading to a trial halt, reported N. Nora Bennani, MD, from the Mayo Clinic in Rochester, Minn.

“These findings likely reflect the distinct biology of PTCL and should be considered when designing future studies using checkpoint inhibitors in these diseases,” she said at the annual meeting of the American Society of Hematology.

The rationale for using an immune checkpoint inhibitor directed against the programmed death–1 protein and its ligands (PD and PD-L1/2) is that malignant cells in PTCL induce a profoundly immunosuppressive tumor microenvironment. Checkpoint inhibitors have shown strong activity against relapsed Hodgkin lymphoma, and the Mayo Clinic researchers speculated that an anti-PD-1 agent could have a similar effect in PTCL.

They had originally planned to enroll 29 patients into a phase 2 trial with nivolumab delivered 240 mg every 2 weeks for eight cycles, followed by a dose of 480 mg given every 4 weeks until disease progression or intolerable toxicities.

Patients were eligible if they had biopsy-confirmed relapsed or refractory PTCL, measurable disease on cross-sectional imaging of at least 1.5 cm, and prior systemic chemoimmunotherapy and/or autologous stem cell transplantation.

The interim analysis included 12 patients who received at least one dose of nivolumab. Of the 12 patients, 6 had angioimmunoblastic T-cell lymphoma (AITL), 3 had PTCL not otherwise specified, and 1 each had ALK-negative anaplastic large cell lymphoma (ALK-ALCL), enteropathy-associated T-cell lymphoma (EATL), or hepatosplenic gamma/delta T-cell lymphoma.

All patients had Ann Arbor stage III/IV disease, and 11 had extranodal involvement.

As noted, there were 4 responses among the 12 patients, consisting of 1 complete response in the patient with ALK-ALCL and 1 in a patient with AITL, and 2 partial responses – 1 in a patient with PTCL-NOS, and 1 in the patient with EATL.

The median progression-free survival for all 12 patients was short at 2.7 months, and the median overall survival was estimated at 6.7 months.

“It was staggering to see this: The duration of response was significantly short, less than 2 months,” Dr. Bennani said.

Nonhematologic toxicities were seen in 5 of the 12 patients (42%), and hematologic adverse events occurred in 3 (25%). All patients are now off treatment, 10 because of disease progression, 1 because of acute pancreatitis, and the aforementioned patient with hyperprogressive disease.

The patient with hyperprogressive disease had significant progression in tonsillar and cervical lymphadenopathy within 7-10 days of nivolumab infusion, with biopsy-proven AITL in the involved nodes.

“I believe that, in this patient population, combination therapies will be key. I think checkpoint blockers alone are not going to be sufficient to see meaningful outcomes in these patients,” Dr. Bennani said in an interview.

“An overall response rate of 33% is significant, because most other agents that were FDA approved in this patient population have response rates around 30%,” she said, adding that it’s possible that the patients with rapid progression had disease too advanced to be effectively treated with a checkpoint inhibitor.

“Ideally however, if we want to move forward, it will need to be with combinations of checkpoint inhibitors with HDAC [histone deacetylase] inhibitors, hypomethylating agents, or even PI3 kinase inhibitors,” she said.

­The study was supported by Bristol-Myers Squibb. Dr. Bennani reported research funding and advisory board activities for Bristol-Myers Squibb and others.

SOURCE: Bennani NN et al. ASH 2019, Abstract 467.

ORLANDO – There is an urgent need for new therapies to treat relapsed or refractory peripheral T-cell lymphoma, but results of a phase 2 study suggest that monotherapy with the immune checkpoint inhibitor nivolumab (Opdivo) is not the hoped-for salvage treatment.

Neil Osterweil/MDedge News

An interim analysis of data on 12 patients with peripheral T-cell lymphoma (PTCL) treated with nivolumab monotherapy showed an overall response rate of 33%, consisting of 2 complete responses and 2 partial responses. But the responses were short lived, and one patient had hyperprogressive disease – dramatic progression within one cycle of treatment – while two more had progression within two cycles, leading to a trial halt, reported N. Nora Bennani, MD, from the Mayo Clinic in Rochester, Minn.

“These findings likely reflect the distinct biology of PTCL and should be considered when designing future studies using checkpoint inhibitors in these diseases,” she said at the annual meeting of the American Society of Hematology.

The rationale for using an immune checkpoint inhibitor directed against the programmed death–1 protein and its ligands (PD and PD-L1/2) is that malignant cells in PTCL induce a profoundly immunosuppressive tumor microenvironment. Checkpoint inhibitors have shown strong activity against relapsed Hodgkin lymphoma, and the Mayo Clinic researchers speculated that an anti-PD-1 agent could have a similar effect in PTCL.

They had originally planned to enroll 29 patients into a phase 2 trial with nivolumab delivered 240 mg every 2 weeks for eight cycles, followed by a dose of 480 mg given every 4 weeks until disease progression or intolerable toxicities.

Patients were eligible if they had biopsy-confirmed relapsed or refractory PTCL, measurable disease on cross-sectional imaging of at least 1.5 cm, and prior systemic chemoimmunotherapy and/or autologous stem cell transplantation.

The interim analysis included 12 patients who received at least one dose of nivolumab. Of the 12 patients, 6 had angioimmunoblastic T-cell lymphoma (AITL), 3 had PTCL not otherwise specified, and 1 each had ALK-negative anaplastic large cell lymphoma (ALK-ALCL), enteropathy-associated T-cell lymphoma (EATL), or hepatosplenic gamma/delta T-cell lymphoma.

All patients had Ann Arbor stage III/IV disease, and 11 had extranodal involvement.

As noted, there were 4 responses among the 12 patients, consisting of 1 complete response in the patient with ALK-ALCL and 1 in a patient with AITL, and 2 partial responses – 1 in a patient with PTCL-NOS, and 1 in the patient with EATL.

The median progression-free survival for all 12 patients was short at 2.7 months, and the median overall survival was estimated at 6.7 months.

“It was staggering to see this: The duration of response was significantly short, less than 2 months,” Dr. Bennani said.

Nonhematologic toxicities were seen in 5 of the 12 patients (42%), and hematologic adverse events occurred in 3 (25%). All patients are now off treatment, 10 because of disease progression, 1 because of acute pancreatitis, and the aforementioned patient with hyperprogressive disease.

The patient with hyperprogressive disease had significant progression in tonsillar and cervical lymphadenopathy within 7-10 days of nivolumab infusion, with biopsy-proven AITL in the involved nodes.

“I believe that, in this patient population, combination therapies will be key. I think checkpoint blockers alone are not going to be sufficient to see meaningful outcomes in these patients,” Dr. Bennani said in an interview.

“An overall response rate of 33% is significant, because most other agents that were FDA approved in this patient population have response rates around 30%,” she said, adding that it’s possible that the patients with rapid progression had disease too advanced to be effectively treated with a checkpoint inhibitor.

“Ideally however, if we want to move forward, it will need to be with combinations of checkpoint inhibitors with HDAC [histone deacetylase] inhibitors, hypomethylating agents, or even PI3 kinase inhibitors,” she said.

­The study was supported by Bristol-Myers Squibb. Dr. Bennani reported research funding and advisory board activities for Bristol-Myers Squibb and others.

SOURCE: Bennani NN et al. ASH 2019, Abstract 467.