CML

CML cells

Image by Difu Wu

Researchers have used a tiny force probe to compare how healthy hematopoietic cells and cancerous ones respond to stress.

They found that cells harvested from the bone marrow of 5 patients with chronic myeloid leukemia (CML) appeared much stiffer than comparable samples taken from 5 healthy volunteers.

In addition, the researchers were able to identify areas of localized brittle failure events in the CML cells.

“What makes this work so exciting to us is not simply seeing a difference between the stiffness of healthy and cancerous cells but observing that the cancerous cells also lost their dynamic ductility and behaved as more breakable objects,” said study author Françoise Argoul, PhD, of the French National Centre for Research (CNRS) in Lyon, France.

Dr Argoul and her colleagues described this work in Physical Biology.

The researchers believe the mechanical signatures obtained by squeezing or deforming cells could potentially assist physicians in determining the presence of CML and other hematologic malignancies.

The mechanical data might also provide clues as to how long the cells have been affected by the cancer.

“We would like to construct a hematopoietic cancer cell chart where the loss of cell mechanical functions could be graded, depending on the leukemia and its stage of evolution,” Dr Argoul said.

Thinking about how the technique might be applied in a hospital setting, she added that biopsy needles could, in principle, be adapted to allow local sensing of internal soft tissue structures.

However, before the researchers can even progress to testing cells inside the body and preparing for clinical trials, they must first build up sufficient information from their measurements on isolated cells under a range of conditions in the lab.

CML cells

Image by Difu Wu

Researchers have used a tiny force probe to compare how healthy hematopoietic cells and cancerous ones respond to stress.

They found that cells harvested from the bone marrow of 5 patients with chronic myeloid leukemia (CML) appeared much stiffer than comparable samples taken from 5 healthy volunteers.

In addition, the researchers were able to identify areas of localized brittle failure events in the CML cells.

“What makes this work so exciting to us is not simply seeing a difference between the stiffness of healthy and cancerous cells but observing that the cancerous cells also lost their dynamic ductility and behaved as more breakable objects,” said study author Françoise Argoul, PhD, of the French National Centre for Research (CNRS) in Lyon, France.

Dr Argoul and her colleagues described this work in Physical Biology.

The researchers believe the mechanical signatures obtained by squeezing or deforming cells could potentially assist physicians in determining the presence of CML and other hematologic malignancies.

The mechanical data might also provide clues as to how long the cells have been affected by the cancer.

“We would like to construct a hematopoietic cancer cell chart where the loss of cell mechanical functions could be graded, depending on the leukemia and its stage of evolution,” Dr Argoul said.

Thinking about how the technique might be applied in a hospital setting, she added that biopsy needles could, in principle, be adapted to allow local sensing of internal soft tissue structures.

However, before the researchers can even progress to testing cells inside the body and preparing for clinical trials, they must first build up sufficient information from their measurements on isolated cells under a range of conditions in the lab.

CML cells

Image by Difu Wu

Researchers have used a tiny force probe to compare how healthy hematopoietic cells and cancerous ones respond to stress.

They found that cells harvested from the bone marrow of 5 patients with chronic myeloid leukemia (CML) appeared much stiffer than comparable samples taken from 5 healthy volunteers.

In addition, the researchers were able to identify areas of localized brittle failure events in the CML cells.

“What makes this work so exciting to us is not simply seeing a difference between the stiffness of healthy and cancerous cells but observing that the cancerous cells also lost their dynamic ductility and behaved as more breakable objects,” said study author Françoise Argoul, PhD, of the French National Centre for Research (CNRS) in Lyon, France.

Dr Argoul and her colleagues described this work in Physical Biology.

The researchers believe the mechanical signatures obtained by squeezing or deforming cells could potentially assist physicians in determining the presence of CML and other hematologic malignancies.

The mechanical data might also provide clues as to how long the cells have been affected by the cancer.

“We would like to construct a hematopoietic cancer cell chart where the loss of cell mechanical functions could be graded, depending on the leukemia and its stage of evolution,” Dr Argoul said.

Thinking about how the technique might be applied in a hospital setting, she added that biopsy needles could, in principle, be adapted to allow local sensing of internal soft tissue structures.

However, before the researchers can even progress to testing cells inside the body and preparing for clinical trials, they must first build up sufficient information from their measurements on isolated cells under a range of conditions in the lab.

COPENHAGEN – A year after stopping tyrosine kinase inhibitor therapy, more than half of patients with chronic myeloid leukemia (CML) in a large clinical trial remained in deep molecular remission.

Among 750 patients with CML in remission for at least 1 year before study entry, 62% retained a treatment response 6 months after stopping a tyrosine kinase inhibitor (TKI) such as imatinib (Gleevec) and 56% retained responses 1 year after being off their drugs, reported Dr. Johan Richter of Lund (Sweden) University at the annual congress of the European Hematology Association.

“About 6 years of therapy [with imatinib] would be optimal for therapy prior to a stop attempt,” he said at a briefing prior to the presentation of data at the congress.

Although in clinical practice patients with CML may remain on a TKI indefinitely, results from small clinical trials have suggested that in 40%-60% of patients with deep molecular responses (MR4.0 or better), TKIs can be safely stopped, Dr. Richter noted.

To get a better handle on when it might be safe to stop a TKI and under what conditions, EURO-SKI investigators enrolled 868 adults with CML in chronic phase from 11 countries, 750 of whom had complete data for the analysis.

In all, 94% of patients had received imatinib in the first line, 2% received dasatinib (Sprycel), and 4% had received nilotinib (Tasigna). Of this group, 115 had switched to a second-line agent due to intolerance of the first-line drug.

The median time from diagnosis was 7.7 years. The median duration of therapy was 7.6 years, and the median duration of MR4 before stopping was 4.7 years.

As noted, among 750 patients assessable for molecular relapse–free survival, 62% remained in remission at 6 months after stopping the TKI, as did 56% at 12 months, 52% at 24 months, and 49% at 36 months.

For patients who resumed therapy, the median time to restart was 4.1 months.

To see whether they could identify any factors prognostic for relapse after stopping a TKI, the investigators used data on 448 patients in the study who were treated with imatinib.

In univariate analysis there was no significant association between molecular relapse–free survival at 6 months and either age, gender, depth of molecular response, or any standard risk scores.

The only significant predictors of molecular remission status at 6 months were duration of imatinib therapy and duration of molecular response before stopping.

The odds ratio for treatment duration was 1.16, indicating that each additional year of imatinib treatment is associated with a 16% increase in the likelihood that a patient would remain in deep molecular remission 6 months after stopping.

The investigators used the minimal P value approach to determine the cutoff of approximately 6 years, based on a molecular relapse–free survival at 6 months of 65.5% for patients who remained on imatinib for more than 5.8 years, compared with 42.6% for those who were on it for 5.8 years or less.

Although the study is ongoing, to date more than 80% of patients who had a loss of deep molecular remission after stopping their TKI regained the remission after resuming therapy, Dr. Richter said.

Dr. Richter said in an interview that longer follow-up will be needed to confirm their findings, and that patients who were sensitive to TKIs prior to stopping therapy remained sensitive when restarting, suggesting that treatment interruption does not increase the likelihood of drug resistance.

Coprincipal investigator Dr. Francois-Xavier Mahon of Bordeaux University in France, noted that in the STIM (Stop Imatinib)–1 and –2 trials, the estimated annual savings to the French health care system were 20 million euros ($22.6 million).

COPENHAGEN – A year after stopping tyrosine kinase inhibitor therapy, more than half of patients with chronic myeloid leukemia (CML) in a large clinical trial remained in deep molecular remission.

Among 750 patients with CML in remission for at least 1 year before study entry, 62% retained a treatment response 6 months after stopping a tyrosine kinase inhibitor (TKI) such as imatinib (Gleevec) and 56% retained responses 1 year after being off their drugs, reported Dr. Johan Richter of Lund (Sweden) University at the annual congress of the European Hematology Association.

“About 6 years of therapy [with imatinib] would be optimal for therapy prior to a stop attempt,” he said at a briefing prior to the presentation of data at the congress.

Although in clinical practice patients with CML may remain on a TKI indefinitely, results from small clinical trials have suggested that in 40%-60% of patients with deep molecular responses (MR4.0 or better), TKIs can be safely stopped, Dr. Richter noted.

To get a better handle on when it might be safe to stop a TKI and under what conditions, EURO-SKI investigators enrolled 868 adults with CML in chronic phase from 11 countries, 750 of whom had complete data for the analysis.

In all, 94% of patients had received imatinib in the first line, 2% received dasatinib (Sprycel), and 4% had received nilotinib (Tasigna). Of this group, 115 had switched to a second-line agent due to intolerance of the first-line drug.

The median time from diagnosis was 7.7 years. The median duration of therapy was 7.6 years, and the median duration of MR4 before stopping was 4.7 years.

As noted, among 750 patients assessable for molecular relapse–free survival, 62% remained in remission at 6 months after stopping the TKI, as did 56% at 12 months, 52% at 24 months, and 49% at 36 months.

For patients who resumed therapy, the median time to restart was 4.1 months.

To see whether they could identify any factors prognostic for relapse after stopping a TKI, the investigators used data on 448 patients in the study who were treated with imatinib.

In univariate analysis there was no significant association between molecular relapse–free survival at 6 months and either age, gender, depth of molecular response, or any standard risk scores.

The only significant predictors of molecular remission status at 6 months were duration of imatinib therapy and duration of molecular response before stopping.

The odds ratio for treatment duration was 1.16, indicating that each additional year of imatinib treatment is associated with a 16% increase in the likelihood that a patient would remain in deep molecular remission 6 months after stopping.

The investigators used the minimal P value approach to determine the cutoff of approximately 6 years, based on a molecular relapse–free survival at 6 months of 65.5% for patients who remained on imatinib for more than 5.8 years, compared with 42.6% for those who were on it for 5.8 years or less.

Although the study is ongoing, to date more than 80% of patients who had a loss of deep molecular remission after stopping their TKI regained the remission after resuming therapy, Dr. Richter said.

Dr. Richter said in an interview that longer follow-up will be needed to confirm their findings, and that patients who were sensitive to TKIs prior to stopping therapy remained sensitive when restarting, suggesting that treatment interruption does not increase the likelihood of drug resistance.

Coprincipal investigator Dr. Francois-Xavier Mahon of Bordeaux University in France, noted that in the STIM (Stop Imatinib)–1 and –2 trials, the estimated annual savings to the French health care system were 20 million euros ($22.6 million).

COPENHAGEN – A year after stopping tyrosine kinase inhibitor therapy, more than half of patients with chronic myeloid leukemia (CML) in a large clinical trial remained in deep molecular remission.

Among 750 patients with CML in remission for at least 1 year before study entry, 62% retained a treatment response 6 months after stopping a tyrosine kinase inhibitor (TKI) such as imatinib (Gleevec) and 56% retained responses 1 year after being off their drugs, reported Dr. Johan Richter of Lund (Sweden) University at the annual congress of the European Hematology Association.

“About 6 years of therapy [with imatinib] would be optimal for therapy prior to a stop attempt,” he said at a briefing prior to the presentation of data at the congress.

Although in clinical practice patients with CML may remain on a TKI indefinitely, results from small clinical trials have suggested that in 40%-60% of patients with deep molecular responses (MR4.0 or better), TKIs can be safely stopped, Dr. Richter noted.

To get a better handle on when it might be safe to stop a TKI and under what conditions, EURO-SKI investigators enrolled 868 adults with CML in chronic phase from 11 countries, 750 of whom had complete data for the analysis.

In all, 94% of patients had received imatinib in the first line, 2% received dasatinib (Sprycel), and 4% had received nilotinib (Tasigna). Of this group, 115 had switched to a second-line agent due to intolerance of the first-line drug.

The median time from diagnosis was 7.7 years. The median duration of therapy was 7.6 years, and the median duration of MR4 before stopping was 4.7 years.

As noted, among 750 patients assessable for molecular relapse–free survival, 62% remained in remission at 6 months after stopping the TKI, as did 56% at 12 months, 52% at 24 months, and 49% at 36 months.

For patients who resumed therapy, the median time to restart was 4.1 months.

To see whether they could identify any factors prognostic for relapse after stopping a TKI, the investigators used data on 448 patients in the study who were treated with imatinib.

In univariate analysis there was no significant association between molecular relapse–free survival at 6 months and either age, gender, depth of molecular response, or any standard risk scores.

The only significant predictors of molecular remission status at 6 months were duration of imatinib therapy and duration of molecular response before stopping.

The odds ratio for treatment duration was 1.16, indicating that each additional year of imatinib treatment is associated with a 16% increase in the likelihood that a patient would remain in deep molecular remission 6 months after stopping.

The investigators used the minimal P value approach to determine the cutoff of approximately 6 years, based on a molecular relapse–free survival at 6 months of 65.5% for patients who remained on imatinib for more than 5.8 years, compared with 42.6% for those who were on it for 5.8 years or less.

Although the study is ongoing, to date more than 80% of patients who had a loss of deep molecular remission after stopping their TKI regained the remission after resuming therapy, Dr. Richter said.

Dr. Richter said in an interview that longer follow-up will be needed to confirm their findings, and that patients who were sensitive to TKIs prior to stopping therapy remained sensitive when restarting, suggesting that treatment interruption does not increase the likelihood of drug resistance.

Coprincipal investigator Dr. Francois-Xavier Mahon of Bordeaux University in France, noted that in the STIM (Stop Imatinib)–1 and –2 trials, the estimated annual savings to the French health care system were 20 million euros ($22.6 million).

Patients with chronic myeloid leukemia (CML) who received tyrosine kinase inhibitors (TKIs) had 1.7 times the rate of arterial or venous vascular events of population-based controls in a large retrospective cohort study.

In addition, second-generation TKIs were associated with higher rates of myocardial infarction than was first-generation imatinib, Dr. Torsten Dahlén of Karolinska University Hospital Solna, Stockholm, and his associates reported. Although absolute numbers of cardiovascular events were low, physicians “should be aware of these risk factors when initiating TKI therapy in patients with CML,” the authors wrote in a study published online June 13 in the Annals of Internal Medicine .

Tyrosine kinase inhibitors have “revolutionized” the prognosis of CML and are generally well tolerated, the researchers noted. But case reports and follow-up studies of clinical trial participants have raised concerns about cardiovascular toxicities with second-generation TKIs, such as nilotinib, they added.

To further study the issue, the investigators compared 896 patients in Sweden who were diagnosed with CML between 2002 and 2012 with 4,438 age- and sex-matched controls from the national population register. By crosschecking both groups against a national patient database, the investigators calculated rates of venous thrombosis, pulmonary embolism, myocardial infarction, cerebrovascular ischemia, and other arterial thromboses (Ann. Intern. Med. 2016 Jun 13. doi: 10.7326/M15-2306).

A total of 846 CML patients (94%) received a TKI during a median of 4.2 years of follow-up, the investigators reported. First-line therapy usually consisted of imatinib (89%), followed by nilotinib (9%) and dasatinib (1%).

The TKI cohort had 78 arterial and venous events during 3,969 person-years of follow-up, compared with 250 events during 21,917 person-years of follow-up for controls, for a statistically significant incidence rate ratio (IRR) of 1.7 (95% confidence interval, 1.3-2.2). Individual IRRs for arterial and venous events also reached statistical significance at 1.5 (95% CI, 1.1-2.1) and 2.0 (95% CI, 1.2-3.3), respectively. Deep venous thrombosis and myocardial infarction accounted for most of the excess risk, with IRRs of 2.2 (95% CI, 1.1-4.4) and 1.9 (95% CI, 1.3-2.7), respectively.

When investigators looked only at the TKI cohort, they found that the rates of arterial thromboembolic events were highest for nilotinib (29 events per 1,000 person-years), followed by dasatinib (19 events per 1,000 person-years) and imatinib (13 events per 1,000 person-years). Nilotinib also was associated with a substantially higher rate of all arterial and venous events (42/1,000 person-years) than dasatinib (20/1,000 person-years) and imatinib (16/1,000 person-years).

Furthermore, nilotinib and dasatinib were associated with higher rates of myocardial infarctions (29 and 19 per 1,000 person-years, respectively) and cerebrovascular ischemic events (11 and 4 events per 1,000 person-years, respectively) than was imatinib (8 events per 1,000 person-years and 4 events per 1,000 person-years, respectively). However, the absolute numbers of events were too small to allow for statistical comparisons, the researchers said.

“The observed increase in thrombotic events may be related to CML itself, the treatment administered, or both,” they noted, but “the prevalence of myocardial infarction in patients with CML before diagnosis was similar to that of the control population, [which] might indicate a treatment-related association.”

Among the 31 patients on TKIs who had a myocardial infarction, 26 (84%) had been previously diagnosed with at least one risk factor for cardiovascular disease, including diabetes (19%), atrial fibrillation (26%), angina pectoris (39%), hypertension (55%), and hyperlipidemia (23%).

Most patients who received nilotinib or dasatinib had previously received imatinib, meaning that they could have had more advanced disease that increased their risk of adverse events, according to the researchers.

“The small number of events also leads us to exercise caution in drawing any strong conclusions,” they added. “Future data from the Swedish CML register will provide more robust evidence regarding the risks of individual drugs as exposure time increases.”

The researchers received no funding for the work. Dr. Dahlén disclosed grant support from Merck outside the submitted work. Two coinvestigators disclosed ties to Ariad, Bristol-Myers, Novartis, and Squibb.

Patients with chronic myeloid leukemia (CML) who received tyrosine kinase inhibitors (TKIs) had 1.7 times the rate of arterial or venous vascular events of population-based controls in a large retrospective cohort study.

In addition, second-generation TKIs were associated with higher rates of myocardial infarction than was first-generation imatinib, Dr. Torsten Dahlén of Karolinska University Hospital Solna, Stockholm, and his associates reported. Although absolute numbers of cardiovascular events were low, physicians “should be aware of these risk factors when initiating TKI therapy in patients with CML,” the authors wrote in a study published online June 13 in the Annals of Internal Medicine .

Tyrosine kinase inhibitors have “revolutionized” the prognosis of CML and are generally well tolerated, the researchers noted. But case reports and follow-up studies of clinical trial participants have raised concerns about cardiovascular toxicities with second-generation TKIs, such as nilotinib, they added.

To further study the issue, the investigators compared 896 patients in Sweden who were diagnosed with CML between 2002 and 2012 with 4,438 age- and sex-matched controls from the national population register. By crosschecking both groups against a national patient database, the investigators calculated rates of venous thrombosis, pulmonary embolism, myocardial infarction, cerebrovascular ischemia, and other arterial thromboses (Ann. Intern. Med. 2016 Jun 13. doi: 10.7326/M15-2306).

A total of 846 CML patients (94%) received a TKI during a median of 4.2 years of follow-up, the investigators reported. First-line therapy usually consisted of imatinib (89%), followed by nilotinib (9%) and dasatinib (1%).

The TKI cohort had 78 arterial and venous events during 3,969 person-years of follow-up, compared with 250 events during 21,917 person-years of follow-up for controls, for a statistically significant incidence rate ratio (IRR) of 1.7 (95% confidence interval, 1.3-2.2). Individual IRRs for arterial and venous events also reached statistical significance at 1.5 (95% CI, 1.1-2.1) and 2.0 (95% CI, 1.2-3.3), respectively. Deep venous thrombosis and myocardial infarction accounted for most of the excess risk, with IRRs of 2.2 (95% CI, 1.1-4.4) and 1.9 (95% CI, 1.3-2.7), respectively.

When investigators looked only at the TKI cohort, they found that the rates of arterial thromboembolic events were highest for nilotinib (29 events per 1,000 person-years), followed by dasatinib (19 events per 1,000 person-years) and imatinib (13 events per 1,000 person-years). Nilotinib also was associated with a substantially higher rate of all arterial and venous events (42/1,000 person-years) than dasatinib (20/1,000 person-years) and imatinib (16/1,000 person-years).

Furthermore, nilotinib and dasatinib were associated with higher rates of myocardial infarctions (29 and 19 per 1,000 person-years, respectively) and cerebrovascular ischemic events (11 and 4 events per 1,000 person-years, respectively) than was imatinib (8 events per 1,000 person-years and 4 events per 1,000 person-years, respectively). However, the absolute numbers of events were too small to allow for statistical comparisons, the researchers said.

“The observed increase in thrombotic events may be related to CML itself, the treatment administered, or both,” they noted, but “the prevalence of myocardial infarction in patients with CML before diagnosis was similar to that of the control population, [which] might indicate a treatment-related association.”

Among the 31 patients on TKIs who had a myocardial infarction, 26 (84%) had been previously diagnosed with at least one risk factor for cardiovascular disease, including diabetes (19%), atrial fibrillation (26%), angina pectoris (39%), hypertension (55%), and hyperlipidemia (23%).

Most patients who received nilotinib or dasatinib had previously received imatinib, meaning that they could have had more advanced disease that increased their risk of adverse events, according to the researchers.

“The small number of events also leads us to exercise caution in drawing any strong conclusions,” they added. “Future data from the Swedish CML register will provide more robust evidence regarding the risks of individual drugs as exposure time increases.”

The researchers received no funding for the work. Dr. Dahlén disclosed grant support from Merck outside the submitted work. Two coinvestigators disclosed ties to Ariad, Bristol-Myers, Novartis, and Squibb.

Patients with chronic myeloid leukemia (CML) who received tyrosine kinase inhibitors (TKIs) had 1.7 times the rate of arterial or venous vascular events of population-based controls in a large retrospective cohort study.

In addition, second-generation TKIs were associated with higher rates of myocardial infarction than was first-generation imatinib, Dr. Torsten Dahlén of Karolinska University Hospital Solna, Stockholm, and his associates reported. Although absolute numbers of cardiovascular events were low, physicians “should be aware of these risk factors when initiating TKI therapy in patients with CML,” the authors wrote in a study published online June 13 in the Annals of Internal Medicine .

Tyrosine kinase inhibitors have “revolutionized” the prognosis of CML and are generally well tolerated, the researchers noted. But case reports and follow-up studies of clinical trial participants have raised concerns about cardiovascular toxicities with second-generation TKIs, such as nilotinib, they added.

To further study the issue, the investigators compared 896 patients in Sweden who were diagnosed with CML between 2002 and 2012 with 4,438 age- and sex-matched controls from the national population register. By crosschecking both groups against a national patient database, the investigators calculated rates of venous thrombosis, pulmonary embolism, myocardial infarction, cerebrovascular ischemia, and other arterial thromboses (Ann. Intern. Med. 2016 Jun 13. doi: 10.7326/M15-2306).

A total of 846 CML patients (94%) received a TKI during a median of 4.2 years of follow-up, the investigators reported. First-line therapy usually consisted of imatinib (89%), followed by nilotinib (9%) and dasatinib (1%).

The TKI cohort had 78 arterial and venous events during 3,969 person-years of follow-up, compared with 250 events during 21,917 person-years of follow-up for controls, for a statistically significant incidence rate ratio (IRR) of 1.7 (95% confidence interval, 1.3-2.2). Individual IRRs for arterial and venous events also reached statistical significance at 1.5 (95% CI, 1.1-2.1) and 2.0 (95% CI, 1.2-3.3), respectively. Deep venous thrombosis and myocardial infarction accounted for most of the excess risk, with IRRs of 2.2 (95% CI, 1.1-4.4) and 1.9 (95% CI, 1.3-2.7), respectively.

When investigators looked only at the TKI cohort, they found that the rates of arterial thromboembolic events were highest for nilotinib (29 events per 1,000 person-years), followed by dasatinib (19 events per 1,000 person-years) and imatinib (13 events per 1,000 person-years). Nilotinib also was associated with a substantially higher rate of all arterial and venous events (42/1,000 person-years) than dasatinib (20/1,000 person-years) and imatinib (16/1,000 person-years).

Furthermore, nilotinib and dasatinib were associated with higher rates of myocardial infarctions (29 and 19 per 1,000 person-years, respectively) and cerebrovascular ischemic events (11 and 4 events per 1,000 person-years, respectively) than was imatinib (8 events per 1,000 person-years and 4 events per 1,000 person-years, respectively). However, the absolute numbers of events were too small to allow for statistical comparisons, the researchers said.

“The observed increase in thrombotic events may be related to CML itself, the treatment administered, or both,” they noted, but “the prevalence of myocardial infarction in patients with CML before diagnosis was similar to that of the control population, [which] might indicate a treatment-related association.”

Among the 31 patients on TKIs who had a myocardial infarction, 26 (84%) had been previously diagnosed with at least one risk factor for cardiovascular disease, including diabetes (19%), atrial fibrillation (26%), angina pectoris (39%), hypertension (55%), and hyperlipidemia (23%).

Most patients who received nilotinib or dasatinib had previously received imatinib, meaning that they could have had more advanced disease that increased their risk of adverse events, according to the researchers.

“The small number of events also leads us to exercise caution in drawing any strong conclusions,” they added. “Future data from the Swedish CML register will provide more robust evidence regarding the risks of individual drugs as exposure time increases.”

The researchers received no funding for the work. Dr. Dahlén disclosed grant support from Merck outside the submitted work. Two coinvestigators disclosed ties to Ariad, Bristol-Myers, Novartis, and Squibb.

ASCO Annual Meeting 2016
© ASCO/Matt Herp

CHICAGO—Nearly 60% of chronic myeloid leukemia (CML) patients who switch to nilotinib from imatinib maintain treatment-free remission for 48 weeks after stopping treatment, according to a new study, ENESTop, presented at the 2016 ASCO Annual Meeting (abstract 7054). 

Treatment-free remission (TFR)—stopping tyrosine kinase inhibitor therapy after achieving a sustained deep molecular response—is an emerging treatment goal for patients with CML in chronic phase (CML-CP).

Results from Evaluating Nilotinib Efficacy and Safety in Clinical Trials–Complete Molecular Response (ENESTcmr) demonstrated that patients on long-term imatinib who had not achieved MR4.5 were more likely to achieve this response by switching to nilotinib than by remaining on imatinib. 

“This suggests that, compared with remaining on imatinib, switching to nilotinib may enable more of these patients to reach a molecular response level required for attempting to achieve TFR in clinical trials,” said lead author Timothy Hughes, MD, of University of Adelaide in Australia. 

ENESTop is the first study, providing the largest set of prospective TFR data to date, to specifically assess TFR in patients who achieved a sustained deep molecular response after switching from imatinib to nilotinib. 

The trial evaluated 126 patients who were able to achieve a sustained deep molecular response with nilotinib, but not with prior imatinib therapy.

The study met its primary endpoint of the proportion of patients without confirmed loss of MR4.0 or loss of major molecular response (MMR) within 48 weeks of nilotinib discontinuation in the TFR phase. 

Some 57.9% patients who achieved a sustained deep molecular response following at least three years of nilotinib therapy maintained a molecular response 48 weeks after stopping treatment.

Of the 51 patients with confirmed loss of MR4.0 or loss of MMR who restarted nilotinib, 98.0% regained at least MMR, with 94.1% regaining MR4.0 and 92.2% regaining MR4.5. 

By weeks 12 and 13 of treatment reinitiation with nilotinib, half of retreated patients already achieved MR4.0 and MR4.5, respectively. 

One patient entered the treatment reinitiation phase, but did not regain MMR by 20 weeks and discontinued the study. 

“MR4.5 achieved following the switch from imatinib to nilotinib,” Dr Hughes said, “was durable in most patients; more than three quarters of enrolled patients were eligible to enter the TFR phase.”

No new safety signals were observed, Dr Hughes said. Consistent with reports in imatinib-treated patients, the rates of all grade musculoskeletal pain were 42.1% in the first year of the TFR phase versus 14.3% while still taking nilotinib in the consolidation phase. 

Dr Hughes said the results suggest “TFR can be maintained in the majority of patients who achieve a sustained deep molecular response with nilotinib following switch from imatinib.”

He continued, “The results from ENESTop, together with those from ENESTcmr, show that a higher proportion of patients switching to nilotinib achieve MR 4.5, suggesting that a higher proportion of patients switching to nilotinib will achieve TFR compared with patients continuing on imatinib.”

Novartis is the sponsor of ENESTop and the manufacturer of imatinib (Gleevec) and nilotinib (Tasigna). Dr Hughes disclosed that he has received honoraria and research funding from Novartis.

ASCO Annual Meeting 2016
© ASCO/Matt Herp

CHICAGO—Nearly 60% of chronic myeloid leukemia (CML) patients who switch to nilotinib from imatinib maintain treatment-free remission for 48 weeks after stopping treatment, according to a new study, ENESTop, presented at the 2016 ASCO Annual Meeting (abstract 7054). 

Treatment-free remission (TFR)—stopping tyrosine kinase inhibitor therapy after achieving a sustained deep molecular response—is an emerging treatment goal for patients with CML in chronic phase (CML-CP).

Results from Evaluating Nilotinib Efficacy and Safety in Clinical Trials–Complete Molecular Response (ENESTcmr) demonstrated that patients on long-term imatinib who had not achieved MR4.5 were more likely to achieve this response by switching to nilotinib than by remaining on imatinib. 

“This suggests that, compared with remaining on imatinib, switching to nilotinib may enable more of these patients to reach a molecular response level required for attempting to achieve TFR in clinical trials,” said lead author Timothy Hughes, MD, of University of Adelaide in Australia. 

ENESTop is the first study, providing the largest set of prospective TFR data to date, to specifically assess TFR in patients who achieved a sustained deep molecular response after switching from imatinib to nilotinib. 

The trial evaluated 126 patients who were able to achieve a sustained deep molecular response with nilotinib, but not with prior imatinib therapy.

The study met its primary endpoint of the proportion of patients without confirmed loss of MR4.0 or loss of major molecular response (MMR) within 48 weeks of nilotinib discontinuation in the TFR phase. 

Some 57.9% patients who achieved a sustained deep molecular response following at least three years of nilotinib therapy maintained a molecular response 48 weeks after stopping treatment.

Of the 51 patients with confirmed loss of MR4.0 or loss of MMR who restarted nilotinib, 98.0% regained at least MMR, with 94.1% regaining MR4.0 and 92.2% regaining MR4.5. 

By weeks 12 and 13 of treatment reinitiation with nilotinib, half of retreated patients already achieved MR4.0 and MR4.5, respectively. 

One patient entered the treatment reinitiation phase, but did not regain MMR by 20 weeks and discontinued the study. 

“MR4.5 achieved following the switch from imatinib to nilotinib,” Dr Hughes said, “was durable in most patients; more than three quarters of enrolled patients were eligible to enter the TFR phase.”

No new safety signals were observed, Dr Hughes said. Consistent with reports in imatinib-treated patients, the rates of all grade musculoskeletal pain were 42.1% in the first year of the TFR phase versus 14.3% while still taking nilotinib in the consolidation phase. 

Dr Hughes said the results suggest “TFR can be maintained in the majority of patients who achieve a sustained deep molecular response with nilotinib following switch from imatinib.”

He continued, “The results from ENESTop, together with those from ENESTcmr, show that a higher proportion of patients switching to nilotinib achieve MR 4.5, suggesting that a higher proportion of patients switching to nilotinib will achieve TFR compared with patients continuing on imatinib.”

Novartis is the sponsor of ENESTop and the manufacturer of imatinib (Gleevec) and nilotinib (Tasigna). Dr Hughes disclosed that he has received honoraria and research funding from Novartis.

ASCO Annual Meeting 2016
© ASCO/Matt Herp

CHICAGO—Nearly 60% of chronic myeloid leukemia (CML) patients who switch to nilotinib from imatinib maintain treatment-free remission for 48 weeks after stopping treatment, according to a new study, ENESTop, presented at the 2016 ASCO Annual Meeting (abstract 7054). 

Treatment-free remission (TFR)—stopping tyrosine kinase inhibitor therapy after achieving a sustained deep molecular response—is an emerging treatment goal for patients with CML in chronic phase (CML-CP).

Results from Evaluating Nilotinib Efficacy and Safety in Clinical Trials–Complete Molecular Response (ENESTcmr) demonstrated that patients on long-term imatinib who had not achieved MR4.5 were more likely to achieve this response by switching to nilotinib than by remaining on imatinib. 

“This suggests that, compared with remaining on imatinib, switching to nilotinib may enable more of these patients to reach a molecular response level required for attempting to achieve TFR in clinical trials,” said lead author Timothy Hughes, MD, of University of Adelaide in Australia. 

ENESTop is the first study, providing the largest set of prospective TFR data to date, to specifically assess TFR in patients who achieved a sustained deep molecular response after switching from imatinib to nilotinib. 

The trial evaluated 126 patients who were able to achieve a sustained deep molecular response with nilotinib, but not with prior imatinib therapy.

The study met its primary endpoint of the proportion of patients without confirmed loss of MR4.0 or loss of major molecular response (MMR) within 48 weeks of nilotinib discontinuation in the TFR phase. 

Some 57.9% patients who achieved a sustained deep molecular response following at least three years of nilotinib therapy maintained a molecular response 48 weeks after stopping treatment.

Of the 51 patients with confirmed loss of MR4.0 or loss of MMR who restarted nilotinib, 98.0% regained at least MMR, with 94.1% regaining MR4.0 and 92.2% regaining MR4.5. 

By weeks 12 and 13 of treatment reinitiation with nilotinib, half of retreated patients already achieved MR4.0 and MR4.5, respectively. 

One patient entered the treatment reinitiation phase, but did not regain MMR by 20 weeks and discontinued the study. 

“MR4.5 achieved following the switch from imatinib to nilotinib,” Dr Hughes said, “was durable in most patients; more than three quarters of enrolled patients were eligible to enter the TFR phase.”

No new safety signals were observed, Dr Hughes said. Consistent with reports in imatinib-treated patients, the rates of all grade musculoskeletal pain were 42.1% in the first year of the TFR phase versus 14.3% while still taking nilotinib in the consolidation phase. 

Dr Hughes said the results suggest “TFR can be maintained in the majority of patients who achieve a sustained deep molecular response with nilotinib following switch from imatinib.”

He continued, “The results from ENESTop, together with those from ENESTcmr, show that a higher proportion of patients switching to nilotinib achieve MR 4.5, suggesting that a higher proportion of patients switching to nilotinib will achieve TFR compared with patients continuing on imatinib.”

Novartis is the sponsor of ENESTop and the manufacturer of imatinib (Gleevec) and nilotinib (Tasigna). Dr Hughes disclosed that he has received honoraria and research funding from Novartis.

Hematology News’ Editor-in-Chief Matt Kalaycio selected the following as his “top 10” picks for hematologic oncology abstracts at ASCO 2016:

Abstract 7000: Final results of a phase III randomized trial of CPX-351 versus 7+3 in older patients with newly diagnosed high risk (secondary) AML

Comment: When any treatment appears to improve survival, compared with 7+3 for AML, all must take notice.

Link to abstract 7000

Abstract 7001: Treatment-free remission (TFR) in patients (pts) with chronic myeloid leukemia in chronic phase (CML-CP) treated with frontline nilotinib: Results from the ENESTFreedom study

Comment: About 50% of the CML patients treated with frontline nilotinib are eventually able to stop the drug and successfully stay off of it. That means more patients in treatment-free remission, compared with those initially treated with imatinib.

Link to abstract 7001

Abstract 7007: Phase Ib/2 study of venetoclax with low-dose cytarabine in treatment-naive patients age ≥ 65 with acute myelogenous leukemia

Abstract 7009: Results of a phase 1b study of venetoclax plus decitabine or azacitidine in untreated acute myeloid leukemia patients ≥ 65 years ineligible for standard induction therapy

Comment: The response rates in these older AML patients are remarkable and challenge results typically seen with 7+3 in a younger population.

Link to abstract 7007 and 7009

Abstract 7501: A prospective, multicenter, randomized study of anti-CCR4 monoclonal antibody mogamulizumab (moga) vs investigator’s choice (IC) in the treatment of patients (pts) with relapsed/refractory (R/R) adult T-cell leukemia-lymphoma (ATL)

Comment: The response rate to mogamulizumab was outstanding in the largest randomized clinical trial thus far conducted for this cancer. Although rare in the USA, ATL is more common in Asia.

Link to abstract 7501

Abstract 7507: Effect of bortezomib on complete remission (CR) rate when added to bendamustine-rituximab (BR) in previously untreated high-risk (HR) follicular lymphoma (FL): A randomized phase II trial of the ECOG-ACRIN Cancer Research Group (E2408)

Comment: This interesting observation of improved complete remission needs longer follow-up.

Link to abstract 7507

Abstract 7519: Venetoclax activity in CLL patients who have relapsed after or are refractory to ibrutinib or idelalisib

Comment: This study has implications for practice. Venetoclax elicits a 50%-60% response rate after patients with CLL progress during treatment with B-cell receptor pathway inhibitors.

Link to abstract 7519

Abstract 7521: Acalabrutinib, a second-generation bruton tyrosine kinase (Btk) inhibitor, in previously untreated chronic lymphocytic leukemia (CLL)

Comment: This next-generation variation on ibrutinib was associated with a 96% overall response rate with fewer adverse effects such as atrial fibrillation.

Link to abstract 7521

Abstract 8000: Upfront autologous stem cell transplantation (ASCT) versus novel agent-based therapy for multiple myeloma (MM): A randomized phase 3 study of the European Myeloma Network (EMN02/HO95 MM trial)

Comment: Other trials are underway to address the role of upfront ASCT for newly diagnosed multiple myeloma. While the last word on this issue has yet to be written, ASCT remains the standard of care for MM patients after induction.

Link to abstract 8000

LBA4: Phase III randomized controlled study of daratumumab, bortezomib, and dexamethasone (DVd) versus bortezomib and dexamethasone (Vd) in patients (pts) with relapsed or refractory multiple myeloma (RRMM): CASTOR study

Comment: As predicted by most, the addition of daratumumab to bortezomib-based therapy increases response rates, compared with bortezomib-based alone. Efficacy is becoming less of a concern with myeloma treatment than is economics..

Look for the full, final text of this abstract to be posted online at 7:30 AM (EDT) on Sunday, June 5.

Hematology News’ Editor-in-Chief Matt Kalaycio selected the following as his “top 10” picks for hematologic oncology abstracts at ASCO 2016:

Abstract 7000: Final results of a phase III randomized trial of CPX-351 versus 7+3 in older patients with newly diagnosed high risk (secondary) AML

Comment: When any treatment appears to improve survival, compared with 7+3 for AML, all must take notice.

Link to abstract 7000

Abstract 7001: Treatment-free remission (TFR) in patients (pts) with chronic myeloid leukemia in chronic phase (CML-CP) treated with frontline nilotinib: Results from the ENESTFreedom study

Comment: About 50% of the CML patients treated with frontline nilotinib are eventually able to stop the drug and successfully stay off of it. That means more patients in treatment-free remission, compared with those initially treated with imatinib.

Link to abstract 7001

Abstract 7007: Phase Ib/2 study of venetoclax with low-dose cytarabine in treatment-naive patients age ≥ 65 with acute myelogenous leukemia

Abstract 7009: Results of a phase 1b study of venetoclax plus decitabine or azacitidine in untreated acute myeloid leukemia patients ≥ 65 years ineligible for standard induction therapy

Comment: The response rates in these older AML patients are remarkable and challenge results typically seen with 7+3 in a younger population.

Link to abstract 7007 and 7009

Abstract 7501: A prospective, multicenter, randomized study of anti-CCR4 monoclonal antibody mogamulizumab (moga) vs investigator’s choice (IC) in the treatment of patients (pts) with relapsed/refractory (R/R) adult T-cell leukemia-lymphoma (ATL)

Comment: The response rate to mogamulizumab was outstanding in the largest randomized clinical trial thus far conducted for this cancer. Although rare in the USA, ATL is more common in Asia.

Link to abstract 7501

Abstract 7507: Effect of bortezomib on complete remission (CR) rate when added to bendamustine-rituximab (BR) in previously untreated high-risk (HR) follicular lymphoma (FL): A randomized phase II trial of the ECOG-ACRIN Cancer Research Group (E2408)

Comment: This interesting observation of improved complete remission needs longer follow-up.

Link to abstract 7507

Abstract 7519: Venetoclax activity in CLL patients who have relapsed after or are refractory to ibrutinib or idelalisib

Comment: This study has implications for practice. Venetoclax elicits a 50%-60% response rate after patients with CLL progress during treatment with B-cell receptor pathway inhibitors.

Link to abstract 7519

Abstract 7521: Acalabrutinib, a second-generation bruton tyrosine kinase (Btk) inhibitor, in previously untreated chronic lymphocytic leukemia (CLL)

Comment: This next-generation variation on ibrutinib was associated with a 96% overall response rate with fewer adverse effects such as atrial fibrillation.

Link to abstract 7521

Abstract 8000: Upfront autologous stem cell transplantation (ASCT) versus novel agent-based therapy for multiple myeloma (MM): A randomized phase 3 study of the European Myeloma Network (EMN02/HO95 MM trial)

Comment: Other trials are underway to address the role of upfront ASCT for newly diagnosed multiple myeloma. While the last word on this issue has yet to be written, ASCT remains the standard of care for MM patients after induction.

Link to abstract 8000

LBA4: Phase III randomized controlled study of daratumumab, bortezomib, and dexamethasone (DVd) versus bortezomib and dexamethasone (Vd) in patients (pts) with relapsed or refractory multiple myeloma (RRMM): CASTOR study

Comment: As predicted by most, the addition of daratumumab to bortezomib-based therapy increases response rates, compared with bortezomib-based alone. Efficacy is becoming less of a concern with myeloma treatment than is economics..

Look for the full, final text of this abstract to be posted online at 7:30 AM (EDT) on Sunday, June 5.

Hematology News’ Editor-in-Chief Matt Kalaycio selected the following as his “top 10” picks for hematologic oncology abstracts at ASCO 2016:

Abstract 7000: Final results of a phase III randomized trial of CPX-351 versus 7+3 in older patients with newly diagnosed high risk (secondary) AML

Comment: When any treatment appears to improve survival, compared with 7+3 for AML, all must take notice.

Link to abstract 7000

Abstract 7001: Treatment-free remission (TFR) in patients (pts) with chronic myeloid leukemia in chronic phase (CML-CP) treated with frontline nilotinib: Results from the ENESTFreedom study

Comment: About 50% of the CML patients treated with frontline nilotinib are eventually able to stop the drug and successfully stay off of it. That means more patients in treatment-free remission, compared with those initially treated with imatinib.

Link to abstract 7001

Abstract 7007: Phase Ib/2 study of venetoclax with low-dose cytarabine in treatment-naive patients age ≥ 65 with acute myelogenous leukemia

Abstract 7009: Results of a phase 1b study of venetoclax plus decitabine or azacitidine in untreated acute myeloid leukemia patients ≥ 65 years ineligible for standard induction therapy

Comment: The response rates in these older AML patients are remarkable and challenge results typically seen with 7+3 in a younger population.

Link to abstract 7007 and 7009

Abstract 7501: A prospective, multicenter, randomized study of anti-CCR4 monoclonal antibody mogamulizumab (moga) vs investigator’s choice (IC) in the treatment of patients (pts) with relapsed/refractory (R/R) adult T-cell leukemia-lymphoma (ATL)

Comment: The response rate to mogamulizumab was outstanding in the largest randomized clinical trial thus far conducted for this cancer. Although rare in the USA, ATL is more common in Asia.

Link to abstract 7501

Abstract 7507: Effect of bortezomib on complete remission (CR) rate when added to bendamustine-rituximab (BR) in previously untreated high-risk (HR) follicular lymphoma (FL): A randomized phase II trial of the ECOG-ACRIN Cancer Research Group (E2408)

Comment: This interesting observation of improved complete remission needs longer follow-up.

Link to abstract 7507

Abstract 7519: Venetoclax activity in CLL patients who have relapsed after or are refractory to ibrutinib or idelalisib

Comment: This study has implications for practice. Venetoclax elicits a 50%-60% response rate after patients with CLL progress during treatment with B-cell receptor pathway inhibitors.

Link to abstract 7519

Abstract 7521: Acalabrutinib, a second-generation bruton tyrosine kinase (Btk) inhibitor, in previously untreated chronic lymphocytic leukemia (CLL)

Comment: This next-generation variation on ibrutinib was associated with a 96% overall response rate with fewer adverse effects such as atrial fibrillation.

Link to abstract 7521

Abstract 8000: Upfront autologous stem cell transplantation (ASCT) versus novel agent-based therapy for multiple myeloma (MM): A randomized phase 3 study of the European Myeloma Network (EMN02/HO95 MM trial)

Comment: Other trials are underway to address the role of upfront ASCT for newly diagnosed multiple myeloma. While the last word on this issue has yet to be written, ASCT remains the standard of care for MM patients after induction.

Link to abstract 8000

LBA4: Phase III randomized controlled study of daratumumab, bortezomib, and dexamethasone (DVd) versus bortezomib and dexamethasone (Vd) in patients (pts) with relapsed or refractory multiple myeloma (RRMM): CASTOR study

Comment: As predicted by most, the addition of daratumumab to bortezomib-based therapy increases response rates, compared with bortezomib-based alone. Efficacy is becoming less of a concern with myeloma treatment than is economics..

Look for the full, final text of this abstract to be posted online at 7:30 AM (EDT) on Sunday, June 5.

Overall survival and progression-free survival were similar at 5 years in chronic myeloid leukemia patients receiving dasatinib or imatinib, but those given dasatinib had higher major molecular response rates and complete cytogenic response rates without a higher rate of adverse events, based on an extension study of previously published data from the DASISION trial.

The DASISION phase III clinical trial included 519 patients with newly diagnosed and treatment-naive chronic myeloid leukemia. Participants were randomly assigned to receive either 100 mg of dasatinib daily (259 patients) or 400 mg of imatinib daily (260 patients). Dosage was altered on a per-patient basis if adverse events or suboptimal responses were observed. The median average daily dose was 99 mg for dasatinib and 400 mg for imatinib after 5 years.

Courtesy Wikimedia Commons/Difu Wu/Creative Commons License

“Initial results showed that dasatinib had met its primary end point of superior efficacy compared with imatinib and had an acceptable safety profile, leading to its approval for first-line use,” reported Dr. Jorge Cortes of the University of Texas MD Anderson Cancer Center, Houston, and his associates (J Clin Oncol. 2016 May 23. doi: 10.1200/JCO.2015.64.8899). Given the faster and deeper molecular responses seen in patients taking dasatinib, “dasatinib should continue to be considered a standard first-line therapy for patients with newly diagnosed” chronic myeloid leukemia, they wrote.

In DASISION (Dasatinib Versus Imatinib Study in Treatment-Naive Chronic Myeloid Leukemia Patients), complete cytogenic response, major molecular response, overall survival, and progression-free survival were measured.

The major molecular response rate was significantly higher for patients receiving dasatinib, compared with patients receiving imatinib (76% vs. 64%, P = .0022).

The rate of complete cytogenic response was 28% for dasatinib and 26% for imatinib.

The 5-year overall survival for patients receiving dasatinib was 91% and was not significantly different than the overall survival rate for patients receiving imatinib (90%, P = .1192). Five-year progression-free survival was 85% for patients receiving dasatinib and 86% for patients receiving imatinib.

Grade 3 or 4 adverse events were seen in 15% of patients receiving dasatinib and 11% of patients receiving imatinib. After 5 years, 26 patients had died in each experimental group.

This study was supported by Bristol-Myers Squibb. Eleven investigators reported serving in advisory roles or receiving financial compensation from multiple companies. One investigator had no disclosures to report.

[email protected]

On Twitter @JessCraig_OP

Overall survival and progression-free survival were similar at 5 years in chronic myeloid leukemia patients receiving dasatinib or imatinib, but those given dasatinib had higher major molecular response rates and complete cytogenic response rates without a higher rate of adverse events, based on an extension study of previously published data from the DASISION trial.

The DASISION phase III clinical trial included 519 patients with newly diagnosed and treatment-naive chronic myeloid leukemia. Participants were randomly assigned to receive either 100 mg of dasatinib daily (259 patients) or 400 mg of imatinib daily (260 patients). Dosage was altered on a per-patient basis if adverse events or suboptimal responses were observed. The median average daily dose was 99 mg for dasatinib and 400 mg for imatinib after 5 years.

Courtesy Wikimedia Commons/Difu Wu/Creative Commons License

“Initial results showed that dasatinib had met its primary end point of superior efficacy compared with imatinib and had an acceptable safety profile, leading to its approval for first-line use,” reported Dr. Jorge Cortes of the University of Texas MD Anderson Cancer Center, Houston, and his associates (J Clin Oncol. 2016 May 23. doi: 10.1200/JCO.2015.64.8899). Given the faster and deeper molecular responses seen in patients taking dasatinib, “dasatinib should continue to be considered a standard first-line therapy for patients with newly diagnosed” chronic myeloid leukemia, they wrote.

In DASISION (Dasatinib Versus Imatinib Study in Treatment-Naive Chronic Myeloid Leukemia Patients), complete cytogenic response, major molecular response, overall survival, and progression-free survival were measured.

The major molecular response rate was significantly higher for patients receiving dasatinib, compared with patients receiving imatinib (76% vs. 64%, P = .0022).

The rate of complete cytogenic response was 28% for dasatinib and 26% for imatinib.

The 5-year overall survival for patients receiving dasatinib was 91% and was not significantly different than the overall survival rate for patients receiving imatinib (90%, P = .1192). Five-year progression-free survival was 85% for patients receiving dasatinib and 86% for patients receiving imatinib.

Grade 3 or 4 adverse events were seen in 15% of patients receiving dasatinib and 11% of patients receiving imatinib. After 5 years, 26 patients had died in each experimental group.

This study was supported by Bristol-Myers Squibb. Eleven investigators reported serving in advisory roles or receiving financial compensation from multiple companies. One investigator had no disclosures to report.

[email protected]

On Twitter @JessCraig_OP

Overall survival and progression-free survival were similar at 5 years in chronic myeloid leukemia patients receiving dasatinib or imatinib, but those given dasatinib had higher major molecular response rates and complete cytogenic response rates without a higher rate of adverse events, based on an extension study of previously published data from the DASISION trial.

The DASISION phase III clinical trial included 519 patients with newly diagnosed and treatment-naive chronic myeloid leukemia. Participants were randomly assigned to receive either 100 mg of dasatinib daily (259 patients) or 400 mg of imatinib daily (260 patients). Dosage was altered on a per-patient basis if adverse events or suboptimal responses were observed. The median average daily dose was 99 mg for dasatinib and 400 mg for imatinib after 5 years.

Courtesy Wikimedia Commons/Difu Wu/Creative Commons License

“Initial results showed that dasatinib had met its primary end point of superior efficacy compared with imatinib and had an acceptable safety profile, leading to its approval for first-line use,” reported Dr. Jorge Cortes of the University of Texas MD Anderson Cancer Center, Houston, and his associates (J Clin Oncol. 2016 May 23. doi: 10.1200/JCO.2015.64.8899). Given the faster and deeper molecular responses seen in patients taking dasatinib, “dasatinib should continue to be considered a standard first-line therapy for patients with newly diagnosed” chronic myeloid leukemia, they wrote.

In DASISION (Dasatinib Versus Imatinib Study in Treatment-Naive Chronic Myeloid Leukemia Patients), complete cytogenic response, major molecular response, overall survival, and progression-free survival were measured.

The major molecular response rate was significantly higher for patients receiving dasatinib, compared with patients receiving imatinib (76% vs. 64%, P = .0022).

The rate of complete cytogenic response was 28% for dasatinib and 26% for imatinib.

The 5-year overall survival for patients receiving dasatinib was 91% and was not significantly different than the overall survival rate for patients receiving imatinib (90%, P = .1192). Five-year progression-free survival was 85% for patients receiving dasatinib and 86% for patients receiving imatinib.

Grade 3 or 4 adverse events were seen in 15% of patients receiving dasatinib and 11% of patients receiving imatinib. After 5 years, 26 patients had died in each experimental group.

This study was supported by Bristol-Myers Squibb. Eleven investigators reported serving in advisory roles or receiving financial compensation from multiple companies. One investigator had no disclosures to report.

[email protected]

On Twitter @JessCraig_OP

Depending on the number and type of BCR-ABL1 mutations, certain patients with chronic myeloid leukemia may have a better response to ponatinib than to other tyrosine kinase inhibitors, according to a report published in Blood.

For patients with CML treated with first- or second-generation tyrosine kinase inhibitors such as imatinib, nilotinib, and dasatinib, the most common cause of treatment failure is the acquisition of mutations in the BCR-ABL1 gene, particularly the T315I mutation, which interfere with drug binding and eventually confer drug resistance. Some of these cancers have proved susceptible to ponatinib, but treatment response varies among patients, said Dr. Wendy T. Parker of the Australian Cancer Research Foundation (ACRF) Cancer Genomics Facility, the Center for Cancer Biology, and the University of Adelaide (Australia) and her associates.

They retrospectively assessed peripheral blood samples from 363 CML patients who had taken part in a phase II study of ponatinib therapy, using their newly developed mass spectrometry–based mutation detection assay to determine which mutations correlated with which treatment outcomes. These study participants contributed blood samples before, during, and after ponatinib treatment. The mass spectrometry–based assay can detect BCR-ABL1 KD mutations present at levels between 10- and 100-fold below those detectable using conventional Sanger sequencing, the researchers said (Blood. 2016;127[15]:1870-80).

Patients who had the T315I mutation plus additional mutations at baseline (32% of the study population) had significantly worse treatment responses and significantly worse outcomes than those who had only the T315I mutation at baseline. “Consequently, these patients may benefit from close monitoring, experimental approaches, or stem-cell transplantation to reduce the risk of tyrosine kinase inhibitor failure,” Dr. Parker and her associates said.

In addition, patients who didn’t have the T315I mutation but had multiple other mutations at baseline responded well to ponatinib. Historically, such patients have not responded well to first- or second-generation tyrosine kinase inhibitors, but ponatinib may prove to be a particularly effective option for this patient population, the investigators said (Blood. 2016;127[15]:1870-80).

These findings demonstrate that mutation analysis, such as that provided by their mass spectrometry–based assay, can be used to guide therapy even after patients have failed on some tyrosine kinase inhibitors, they added.

The study was supported by the maker of ponatinib (Iclusig) Ariad Pharmaceuticals, the Leukemia Foundation of Australia, and the A.R. Clarkson Foundation. Dr. Parker reported having no relevant financial disclosures; some of her associates were employed by Ariad.

Depending on the number and type of BCR-ABL1 mutations, certain patients with chronic myeloid leukemia may have a better response to ponatinib than to other tyrosine kinase inhibitors, according to a report published in Blood.

For patients with CML treated with first- or second-generation tyrosine kinase inhibitors such as imatinib, nilotinib, and dasatinib, the most common cause of treatment failure is the acquisition of mutations in the BCR-ABL1 gene, particularly the T315I mutation, which interfere with drug binding and eventually confer drug resistance. Some of these cancers have proved susceptible to ponatinib, but treatment response varies among patients, said Dr. Wendy T. Parker of the Australian Cancer Research Foundation (ACRF) Cancer Genomics Facility, the Center for Cancer Biology, and the University of Adelaide (Australia) and her associates.

They retrospectively assessed peripheral blood samples from 363 CML patients who had taken part in a phase II study of ponatinib therapy, using their newly developed mass spectrometry–based mutation detection assay to determine which mutations correlated with which treatment outcomes. These study participants contributed blood samples before, during, and after ponatinib treatment. The mass spectrometry–based assay can detect BCR-ABL1 KD mutations present at levels between 10- and 100-fold below those detectable using conventional Sanger sequencing, the researchers said (Blood. 2016;127[15]:1870-80).

Patients who had the T315I mutation plus additional mutations at baseline (32% of the study population) had significantly worse treatment responses and significantly worse outcomes than those who had only the T315I mutation at baseline. “Consequently, these patients may benefit from close monitoring, experimental approaches, or stem-cell transplantation to reduce the risk of tyrosine kinase inhibitor failure,” Dr. Parker and her associates said.

In addition, patients who didn’t have the T315I mutation but had multiple other mutations at baseline responded well to ponatinib. Historically, such patients have not responded well to first- or second-generation tyrosine kinase inhibitors, but ponatinib may prove to be a particularly effective option for this patient population, the investigators said (Blood. 2016;127[15]:1870-80).

These findings demonstrate that mutation analysis, such as that provided by their mass spectrometry–based assay, can be used to guide therapy even after patients have failed on some tyrosine kinase inhibitors, they added.

The study was supported by the maker of ponatinib (Iclusig) Ariad Pharmaceuticals, the Leukemia Foundation of Australia, and the A.R. Clarkson Foundation. Dr. Parker reported having no relevant financial disclosures; some of her associates were employed by Ariad.

Depending on the number and type of BCR-ABL1 mutations, certain patients with chronic myeloid leukemia may have a better response to ponatinib than to other tyrosine kinase inhibitors, according to a report published in Blood.

For patients with CML treated with first- or second-generation tyrosine kinase inhibitors such as imatinib, nilotinib, and dasatinib, the most common cause of treatment failure is the acquisition of mutations in the BCR-ABL1 gene, particularly the T315I mutation, which interfere with drug binding and eventually confer drug resistance. Some of these cancers have proved susceptible to ponatinib, but treatment response varies among patients, said Dr. Wendy T. Parker of the Australian Cancer Research Foundation (ACRF) Cancer Genomics Facility, the Center for Cancer Biology, and the University of Adelaide (Australia) and her associates.

They retrospectively assessed peripheral blood samples from 363 CML patients who had taken part in a phase II study of ponatinib therapy, using their newly developed mass spectrometry–based mutation detection assay to determine which mutations correlated with which treatment outcomes. These study participants contributed blood samples before, during, and after ponatinib treatment. The mass spectrometry–based assay can detect BCR-ABL1 KD mutations present at levels between 10- and 100-fold below those detectable using conventional Sanger sequencing, the researchers said (Blood. 2016;127[15]:1870-80).

Patients who had the T315I mutation plus additional mutations at baseline (32% of the study population) had significantly worse treatment responses and significantly worse outcomes than those who had only the T315I mutation at baseline. “Consequently, these patients may benefit from close monitoring, experimental approaches, or stem-cell transplantation to reduce the risk of tyrosine kinase inhibitor failure,” Dr. Parker and her associates said.

In addition, patients who didn’t have the T315I mutation but had multiple other mutations at baseline responded well to ponatinib. Historically, such patients have not responded well to first- or second-generation tyrosine kinase inhibitors, but ponatinib may prove to be a particularly effective option for this patient population, the investigators said (Blood. 2016;127[15]:1870-80).

These findings demonstrate that mutation analysis, such as that provided by their mass spectrometry–based assay, can be used to guide therapy even after patients have failed on some tyrosine kinase inhibitors, they added.

The study was supported by the maker of ponatinib (Iclusig) Ariad Pharmaceuticals, the Leukemia Foundation of Australia, and the A.R. Clarkson Foundation. Dr. Parker reported having no relevant financial disclosures; some of her associates were employed by Ariad.

Stronger teamwork among researchers, sharing data, and realignment of incentives for scientific breakthroughs, in addition to more funding, are key steps needed to advance cancer research, Vice President Joe Biden said during the annual meeting of the American Association for Cancer Research (AACR).

During a plenary speech to close the meeting, Vice President Biden praised the dedication of current cancer researchers and pledged to break down the walls that prevent them from achieving more progress in the field.

“I made a commitment that I will – as I gain this information and knowledge – I will eliminate the barriers that get in your way, get in the way of science and research and development,” he said. “I had to ... learn from all of you how we can proceed, how we can break down silos, how we can accommodate more rapidly the efforts you’re making.”

Vice President Biden, who is leading a new $1 billion initiative to eliminate cancer called “Moonshot,” outlined the top obstacles to cancer research he has garnered from recent visits with renowned cancer scientists and research leaders around the world. This includes a lack of unity among researchers, poor rewards for novel research, and limited data sharing, he said.

“The way the system now is set up, researchers are not incentivized to share their data,” Vice President Biden said, acknowledging that some medical experts are against the idea. “But every expert I’ve spoken to said you need to share these data to move this process rapidly.”

Involving patients earlier in clinical trials design is also a primary focus, he said. Patients should understand more about trials and be more open to signing up.

He noted the “incredible” research currently being conducted by various entities, such as AACR’s Project Genie, Orion Foundation, and The Parker Institute. Mr. Biden stressed however, that such efforts are too isolated.

“It raises [the] question: ‘Why is all this being done separately?’ ” Vice President Biden said. “Why is so much money being spent when if it’s aggregated, everyone acknowledges, the answers would come more quickly?”

Incentives for new research and the way in which funding is alloted must also be redesigned, he stressed. Today, it takes too long for researchers to get projects approved by the government and funding dispersed. He acknowledged the difficulty researchers face in obtaining grants and the fact that those who think “outside the box” are less likely to receive funding.

“It seems to me that we slow down our best minds by making them spend years in the lab before they can get their own grants and, when they do, they spend a third of their time writing a grant that takes months to be approved and awarded,” he said. “It’s like asking Derek Jeter to take several years off to sell bonds to build Yankee stadium.”

The Vice President did not purport to have all the answers, and asked those at the AARC meeting to provide feedback on his suggestions.

“The question I’d ask you to contemplate, because I’d like you to communicate with us, is, ‘Does it require realigning incentives; changing behaviors to take advantage of this inflection point? Does it require sharing more knowledge, treatment, and understanding? Or does that slow the process up?’ ”

He added,“I hope you all know it, but you’re one of the most valuable resources that our great country has, those of you sitting in this room. So ask your institutions, your colleagues, your mentors, your administrators: How can we move your ideas faster together in the interest of patients?”

The Vice President’s Moonshot initiative was announced during President Obama’s 2016 State of the Union Address. The effort includes a new Cancer Moonshot Task Force that will focus on federal investments, targeted incentives, private sector efforts from industry and philanthropy, patient engagement initiatives, and other mechanisms to support cancer research and enable progress in treatment and care, according to the White House. As part of the plan, the President’s fiscal 2017 budget proposes $755 million in mandatory funds for new cancer-related research activities at the National Institutes of Health and the Food and Drug Administration. The initiative also includes increased investments by the Department of Defense and the Department of Veterans Affairs in cancer research, including through funding centers of excellence focused on specific cancers and conducting longitudinal studies to determine risk factors and enhance treatment.

[email protected]

On Twitter @legal_med

Stronger teamwork among researchers, sharing data, and realignment of incentives for scientific breakthroughs, in addition to more funding, are key steps needed to advance cancer research, Vice President Joe Biden said during the annual meeting of the American Association for Cancer Research (AACR).

During a plenary speech to close the meeting, Vice President Biden praised the dedication of current cancer researchers and pledged to break down the walls that prevent them from achieving more progress in the field.

“I made a commitment that I will – as I gain this information and knowledge – I will eliminate the barriers that get in your way, get in the way of science and research and development,” he said. “I had to ... learn from all of you how we can proceed, how we can break down silos, how we can accommodate more rapidly the efforts you’re making.”

Vice President Biden, who is leading a new $1 billion initiative to eliminate cancer called “Moonshot,” outlined the top obstacles to cancer research he has garnered from recent visits with renowned cancer scientists and research leaders around the world. This includes a lack of unity among researchers, poor rewards for novel research, and limited data sharing, he said.

“The way the system now is set up, researchers are not incentivized to share their data,” Vice President Biden said, acknowledging that some medical experts are against the idea. “But every expert I’ve spoken to said you need to share these data to move this process rapidly.”

Involving patients earlier in clinical trials design is also a primary focus, he said. Patients should understand more about trials and be more open to signing up.

He noted the “incredible” research currently being conducted by various entities, such as AACR’s Project Genie, Orion Foundation, and The Parker Institute. Mr. Biden stressed however, that such efforts are too isolated.

“It raises [the] question: ‘Why is all this being done separately?’ ” Vice President Biden said. “Why is so much money being spent when if it’s aggregated, everyone acknowledges, the answers would come more quickly?”

Incentives for new research and the way in which funding is alloted must also be redesigned, he stressed. Today, it takes too long for researchers to get projects approved by the government and funding dispersed. He acknowledged the difficulty researchers face in obtaining grants and the fact that those who think “outside the box” are less likely to receive funding.

“It seems to me that we slow down our best minds by making them spend years in the lab before they can get their own grants and, when they do, they spend a third of their time writing a grant that takes months to be approved and awarded,” he said. “It’s like asking Derek Jeter to take several years off to sell bonds to build Yankee stadium.”

The Vice President did not purport to have all the answers, and asked those at the AARC meeting to provide feedback on his suggestions.

“The question I’d ask you to contemplate, because I’d like you to communicate with us, is, ‘Does it require realigning incentives; changing behaviors to take advantage of this inflection point? Does it require sharing more knowledge, treatment, and understanding? Or does that slow the process up?’ ”

He added,“I hope you all know it, but you’re one of the most valuable resources that our great country has, those of you sitting in this room. So ask your institutions, your colleagues, your mentors, your administrators: How can we move your ideas faster together in the interest of patients?”

The Vice President’s Moonshot initiative was announced during President Obama’s 2016 State of the Union Address. The effort includes a new Cancer Moonshot Task Force that will focus on federal investments, targeted incentives, private sector efforts from industry and philanthropy, patient engagement initiatives, and other mechanisms to support cancer research and enable progress in treatment and care, according to the White House. As part of the plan, the President’s fiscal 2017 budget proposes $755 million in mandatory funds for new cancer-related research activities at the National Institutes of Health and the Food and Drug Administration. The initiative also includes increased investments by the Department of Defense and the Department of Veterans Affairs in cancer research, including through funding centers of excellence focused on specific cancers and conducting longitudinal studies to determine risk factors and enhance treatment.

[email protected]

On Twitter @legal_med

Stronger teamwork among researchers, sharing data, and realignment of incentives for scientific breakthroughs, in addition to more funding, are key steps needed to advance cancer research, Vice President Joe Biden said during the annual meeting of the American Association for Cancer Research (AACR).

During a plenary speech to close the meeting, Vice President Biden praised the dedication of current cancer researchers and pledged to break down the walls that prevent them from achieving more progress in the field.

“I made a commitment that I will – as I gain this information and knowledge – I will eliminate the barriers that get in your way, get in the way of science and research and development,” he said. “I had to ... learn from all of you how we can proceed, how we can break down silos, how we can accommodate more rapidly the efforts you’re making.”

Vice President Biden, who is leading a new $1 billion initiative to eliminate cancer called “Moonshot,” outlined the top obstacles to cancer research he has garnered from recent visits with renowned cancer scientists and research leaders around the world. This includes a lack of unity among researchers, poor rewards for novel research, and limited data sharing, he said.

“The way the system now is set up, researchers are not incentivized to share their data,” Vice President Biden said, acknowledging that some medical experts are against the idea. “But every expert I’ve spoken to said you need to share these data to move this process rapidly.”

Involving patients earlier in clinical trials design is also a primary focus, he said. Patients should understand more about trials and be more open to signing up.

He noted the “incredible” research currently being conducted by various entities, such as AACR’s Project Genie, Orion Foundation, and The Parker Institute. Mr. Biden stressed however, that such efforts are too isolated.

“It raises [the] question: ‘Why is all this being done separately?’ ” Vice President Biden said. “Why is so much money being spent when if it’s aggregated, everyone acknowledges, the answers would come more quickly?”

Incentives for new research and the way in which funding is alloted must also be redesigned, he stressed. Today, it takes too long for researchers to get projects approved by the government and funding dispersed. He acknowledged the difficulty researchers face in obtaining grants and the fact that those who think “outside the box” are less likely to receive funding.

“It seems to me that we slow down our best minds by making them spend years in the lab before they can get their own grants and, when they do, they spend a third of their time writing a grant that takes months to be approved and awarded,” he said. “It’s like asking Derek Jeter to take several years off to sell bonds to build Yankee stadium.”

The Vice President did not purport to have all the answers, and asked those at the AARC meeting to provide feedback on his suggestions.

“The question I’d ask you to contemplate, because I’d like you to communicate with us, is, ‘Does it require realigning incentives; changing behaviors to take advantage of this inflection point? Does it require sharing more knowledge, treatment, and understanding? Or does that slow the process up?’ ”

He added,“I hope you all know it, but you’re one of the most valuable resources that our great country has, those of you sitting in this room. So ask your institutions, your colleagues, your mentors, your administrators: How can we move your ideas faster together in the interest of patients?”

The Vice President’s Moonshot initiative was announced during President Obama’s 2016 State of the Union Address. The effort includes a new Cancer Moonshot Task Force that will focus on federal investments, targeted incentives, private sector efforts from industry and philanthropy, patient engagement initiatives, and other mechanisms to support cancer research and enable progress in treatment and care, according to the White House. As part of the plan, the President’s fiscal 2017 budget proposes $755 million in mandatory funds for new cancer-related research activities at the National Institutes of Health and the Food and Drug Administration. The initiative also includes increased investments by the Department of Defense and the Department of Veterans Affairs in cancer research, including through funding centers of excellence focused on specific cancers and conducting longitudinal studies to determine risk factors and enhance treatment.

[email protected]

On Twitter @legal_med

CML cells

Image from UC San Diego

Scientists say they have developed a model that can be used to calculate the proportion of cancer stem cells (CSCs) present over the course of treatment.

The model is designed to enable estimation of CSC fractions from longitudinal measurements of tumor burden.

The scientists tested the model in patients with chronic myeloid leukemia (CML) and found evidence to suggest the proportion of CSCs increases

substantially during extended treatment.

The team believes the model could eventually be used to help doctors predict tumor development and help them select suitable treatments for cancer patients.

“Cancer stem cells not only promote the growth of a tumor, they can also be resistant to radiotherapy and chemotherapy,” said Philipp Altrock, PhD, of the Dana Farber Cancer Institute in Boston, Massachusetts.

“If we can estimate the number of cancer stem cells at diagnosis and over the course of treatment, the treatment can be tailored accordingly.”

Dr Altrock and his colleagues discussed this possibility in Cancer Research.

The team first explained that their model incorporates tumor dynamics and tumor burden information. They said tumor expansion and regression curves can be leveraged to estimate the proportion of CSCs in individual patients at baseline and during therapy.

To test their model, the scientists used 2 independent cohorts of CML patients. The team evaluated the growth and decline of CML over the course of treatment with the tyrosine kinase inhibitor imatinib.

Based on the change of disease burden during treatment, the model calculated the proportion of CSCs.

Results suggested the proportion of CSCs in CML patients increases 100-fold after a year of treatment with imatinib. And that proportion continues to increase up to 1000-fold after 5 years of treatment.

The scientists noted that this model is parameter-free, so it can be applied to different types of cancer. However, they said further development is required before the model can be used in clinical practice.

CML cells

Image from UC San Diego

Scientists say they have developed a model that can be used to calculate the proportion of cancer stem cells (CSCs) present over the course of treatment.

The model is designed to enable estimation of CSC fractions from longitudinal measurements of tumor burden.

The scientists tested the model in patients with chronic myeloid leukemia (CML) and found evidence to suggest the proportion of CSCs increases

substantially during extended treatment.

The team believes the model could eventually be used to help doctors predict tumor development and help them select suitable treatments for cancer patients.

“Cancer stem cells not only promote the growth of a tumor, they can also be resistant to radiotherapy and chemotherapy,” said Philipp Altrock, PhD, of the Dana Farber Cancer Institute in Boston, Massachusetts.

“If we can estimate the number of cancer stem cells at diagnosis and over the course of treatment, the treatment can be tailored accordingly.”

Dr Altrock and his colleagues discussed this possibility in Cancer Research.

The team first explained that their model incorporates tumor dynamics and tumor burden information. They said tumor expansion and regression curves can be leveraged to estimate the proportion of CSCs in individual patients at baseline and during therapy.

To test their model, the scientists used 2 independent cohorts of CML patients. The team evaluated the growth and decline of CML over the course of treatment with the tyrosine kinase inhibitor imatinib.

Based on the change of disease burden during treatment, the model calculated the proportion of CSCs.

Results suggested the proportion of CSCs in CML patients increases 100-fold after a year of treatment with imatinib. And that proportion continues to increase up to 1000-fold after 5 years of treatment.

The scientists noted that this model is parameter-free, so it can be applied to different types of cancer. However, they said further development is required before the model can be used in clinical practice.

CML cells

Image from UC San Diego

Scientists say they have developed a model that can be used to calculate the proportion of cancer stem cells (CSCs) present over the course of treatment.

The model is designed to enable estimation of CSC fractions from longitudinal measurements of tumor burden.

The scientists tested the model in patients with chronic myeloid leukemia (CML) and found evidence to suggest the proportion of CSCs increases

substantially during extended treatment.

The team believes the model could eventually be used to help doctors predict tumor development and help them select suitable treatments for cancer patients.

“Cancer stem cells not only promote the growth of a tumor, they can also be resistant to radiotherapy and chemotherapy,” said Philipp Altrock, PhD, of the Dana Farber Cancer Institute in Boston, Massachusetts.

“If we can estimate the number of cancer stem cells at diagnosis and over the course of treatment, the treatment can be tailored accordingly.”

Dr Altrock and his colleagues discussed this possibility in Cancer Research.

The team first explained that their model incorporates tumor dynamics and tumor burden information. They said tumor expansion and regression curves can be leveraged to estimate the proportion of CSCs in individual patients at baseline and during therapy.

To test their model, the scientists used 2 independent cohorts of CML patients. The team evaluated the growth and decline of CML over the course of treatment with the tyrosine kinase inhibitor imatinib.

Based on the change of disease burden during treatment, the model calculated the proportion of CSCs.

Results suggested the proportion of CSCs in CML patients increases 100-fold after a year of treatment with imatinib. And that proportion continues to increase up to 1000-fold after 5 years of treatment.

The scientists noted that this model is parameter-free, so it can be applied to different types of cancer. However, they said further development is required before the model can be used in clinical practice.

Short-term low-dose corticosteroid prophylaxis reduces the incidence of graft-vs.-host disease in patients who undergo allogeneic haploidentical stem-cell transplantation to treat hematologic neoplasms, according to a report published online April 18 in the Journal of Clinical Oncology.

The key to selecting patients most likely to benefit from the corticosteroid therapy is to identify those at high risk for graft-vs.-host disease (GVHD) using two biomarkers: high levels of CD56bright natural killer cells in allogeneic grafts or high CD4:CD8 ratios in bone marrow grafts, according to Dr. Ying-Jun Chang of Peking University People’s Hospital, Beijing, and associates.

The investigators performed an open-label trial involving 228 patients aged 15-60 years treated at a single medical center during an 18-month period for acute myeloid leukemia, acute lymphoblastic leukemia, chronic myeloid leukemia, myelodysplastic syndrome, or other hematologic neoplasms. Using the two biomarkers, the patients were categorized as either high or low risk for developing GVHD. They were randomly assigned to three study groups: 72 high-risk patients who received short-term low-dose corticosteroids, 73 high-risk patients who received usual care, and 83 low-risk patients who received usual care.

The cumulative 100-day incidence of acute grade-II to grade-IV GVHD was significantly lower in the high-risk patients who received prophylaxis (21%) than in the high-risk patients who did not receive prophylaxis (48%). In fact, corticosteroids decreased the rate of GVHD so that it was comparable with that in the low-risk patients (26%), Dr. Chang and associates said (J Clin Oncol. 2016 Apr 18. doi: 10.1200/JCO.2015.63l.8817).

Moreover, in the high-risk patients the median interval until GVHD developed was 25 days for those who took corticosteroids, compared with only 15 days for those who did not. Median times to myeloid recovery and platelet recovery were significantly shorter for high-risk patients who received corticosteroids than for either of the other study groups. However, 3-year overall survival and leukemia-free survival were comparable among the three study groups.

The short-term low-dose regimen of corticosteroids did not raise the rate of adverse events, including infection, which suggests that it is preferable to standard corticosteroid regimens in this patient population. The incidences of cytomegalovirus or Epstein-Barr virus reactivation, post-transplantation lymphoproliferative disorder, hemorrhagic cystitis, bacteremia, and invasive fungal infections were comparable among the three study groups. Of note, the incidences of osteonecrosis of the femoral head and secondary hypertension were significantly lower among high-risk patients who received corticosteroid prophylaxis than among those who did not.

“These results provide the first test, to our knowledge, of a novel risk-stratification-directed prophylaxis strategy that effectively prevented acute GVHD among patients who were at high risk for GVHD, without unnecessarily exposing patients who were at low risk to excessive toxicity from additional immunosuppressive agents,” Dr. Chang and associates said.

Short-term low-dose corticosteroid prophylaxis reduces the incidence of graft-vs.-host disease in patients who undergo allogeneic haploidentical stem-cell transplantation to treat hematologic neoplasms, according to a report published online April 18 in the Journal of Clinical Oncology.

The key to selecting patients most likely to benefit from the corticosteroid therapy is to identify those at high risk for graft-vs.-host disease (GVHD) using two biomarkers: high levels of CD56bright natural killer cells in allogeneic grafts or high CD4:CD8 ratios in bone marrow grafts, according to Dr. Ying-Jun Chang of Peking University People’s Hospital, Beijing, and associates.

The investigators performed an open-label trial involving 228 patients aged 15-60 years treated at a single medical center during an 18-month period for acute myeloid leukemia, acute lymphoblastic leukemia, chronic myeloid leukemia, myelodysplastic syndrome, or other hematologic neoplasms. Using the two biomarkers, the patients were categorized as either high or low risk for developing GVHD. They were randomly assigned to three study groups: 72 high-risk patients who received short-term low-dose corticosteroids, 73 high-risk patients who received usual care, and 83 low-risk patients who received usual care.

The cumulative 100-day incidence of acute grade-II to grade-IV GVHD was significantly lower in the high-risk patients who received prophylaxis (21%) than in the high-risk patients who did not receive prophylaxis (48%). In fact, corticosteroids decreased the rate of GVHD so that it was comparable with that in the low-risk patients (26%), Dr. Chang and associates said (J Clin Oncol. 2016 Apr 18. doi: 10.1200/JCO.2015.63l.8817).

Moreover, in the high-risk patients the median interval until GVHD developed was 25 days for those who took corticosteroids, compared with only 15 days for those who did not. Median times to myeloid recovery and platelet recovery were significantly shorter for high-risk patients who received corticosteroids than for either of the other study groups. However, 3-year overall survival and leukemia-free survival were comparable among the three study groups.

The short-term low-dose regimen of corticosteroids did not raise the rate of adverse events, including infection, which suggests that it is preferable to standard corticosteroid regimens in this patient population. The incidences of cytomegalovirus or Epstein-Barr virus reactivation, post-transplantation lymphoproliferative disorder, hemorrhagic cystitis, bacteremia, and invasive fungal infections were comparable among the three study groups. Of note, the incidences of osteonecrosis of the femoral head and secondary hypertension were significantly lower among high-risk patients who received corticosteroid prophylaxis than among those who did not.

“These results provide the first test, to our knowledge, of a novel risk-stratification-directed prophylaxis strategy that effectively prevented acute GVHD among patients who were at high risk for GVHD, without unnecessarily exposing patients who were at low risk to excessive toxicity from additional immunosuppressive agents,” Dr. Chang and associates said.

Short-term low-dose corticosteroid prophylaxis reduces the incidence of graft-vs.-host disease in patients who undergo allogeneic haploidentical stem-cell transplantation to treat hematologic neoplasms, according to a report published online April 18 in the Journal of Clinical Oncology.

The key to selecting patients most likely to benefit from the corticosteroid therapy is to identify those at high risk for graft-vs.-host disease (GVHD) using two biomarkers: high levels of CD56bright natural killer cells in allogeneic grafts or high CD4:CD8 ratios in bone marrow grafts, according to Dr. Ying-Jun Chang of Peking University People’s Hospital, Beijing, and associates.

The investigators performed an open-label trial involving 228 patients aged 15-60 years treated at a single medical center during an 18-month period for acute myeloid leukemia, acute lymphoblastic leukemia, chronic myeloid leukemia, myelodysplastic syndrome, or other hematologic neoplasms. Using the two biomarkers, the patients were categorized as either high or low risk for developing GVHD. They were randomly assigned to three study groups: 72 high-risk patients who received short-term low-dose corticosteroids, 73 high-risk patients who received usual care, and 83 low-risk patients who received usual care.

The cumulative 100-day incidence of acute grade-II to grade-IV GVHD was significantly lower in the high-risk patients who received prophylaxis (21%) than in the high-risk patients who did not receive prophylaxis (48%). In fact, corticosteroids decreased the rate of GVHD so that it was comparable with that in the low-risk patients (26%), Dr. Chang and associates said (J Clin Oncol. 2016 Apr 18. doi: 10.1200/JCO.2015.63l.8817).

Moreover, in the high-risk patients the median interval until GVHD developed was 25 days for those who took corticosteroids, compared with only 15 days for those who did not. Median times to myeloid recovery and platelet recovery were significantly shorter for high-risk patients who received corticosteroids than for either of the other study groups. However, 3-year overall survival and leukemia-free survival were comparable among the three study groups.

The short-term low-dose regimen of corticosteroids did not raise the rate of adverse events, including infection, which suggests that it is preferable to standard corticosteroid regimens in this patient population. The incidences of cytomegalovirus or Epstein-Barr virus reactivation, post-transplantation lymphoproliferative disorder, hemorrhagic cystitis, bacteremia, and invasive fungal infections were comparable among the three study groups. Of note, the incidences of osteonecrosis of the femoral head and secondary hypertension were significantly lower among high-risk patients who received corticosteroid prophylaxis than among those who did not.

“These results provide the first test, to our knowledge, of a novel risk-stratification-directed prophylaxis strategy that effectively prevented acute GVHD among patients who were at high risk for GVHD, without unnecessarily exposing patients who were at low risk to excessive toxicity from additional immunosuppressive agents,” Dr. Chang and associates said.