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For lower-risk MDS, treat ‘what bugs patients most’
Clinicians who treat patients with lower-risk myelodysplastic syndrome should focus on “what bugs patients most,” with therapeutic goals reflecting and respecting the patients’ goals, a specialist in MDS recommended.
“There’s an uncomfortable truth in treating lower-risk MDS: No treatment that we have has ever been demonstrated in a prospective trial to prolong survival in lower-risk MDS, so in the end, what we’re doing is trying to improve transfusion needs and to improve quality of life,” said Michael A. Sekeres, MD, MS, from the Cleveland Clinic.
Dr. Sekeres described optimal therapy for patients with lower-risk MDS in an online presentation during the virtual American Society of Hematology Meeting on Hematologic Malignancies.
He acknowledged that the definition of MDS as “a heterogeneous clonal hematopoietic disorder derived from an abnormal multipotent progenitor cell, characterized by a hyperproliferative bone marrow, dysplasia of the cellular elements, and ineffective hematopoiesis” can be confusing even for hematologists well versed in the disorder.
An easier-to-grasp explanation, he said, is that “MDS is considered a cancer, and like other cancers it has a clonal origin, involves the abnormal growth of cells that exceeds the growth of other cells around them and don’t know when to stop growing, and it takes over normal tissue, so that the normal tissues – in this case the hematopoietic precursors in the bone marrow – don’t function normally, resulting in cytopenias.”
‘Mild displeasure syndrome’
Approximately 95% of patients with MDS have a discrete genetic abnormality, but only one driver mutation, in the gene SF3B1, is considered to be a lower-risk abnormality, with a more favorable prognosis.
Treatment options for patients with lower-risk MDS, defined as an International Prognostic Scoring System score of 1 or less, or a Revised IPSS score of 3.5 or less, will depend on the patients’ transfusion needs and quality of life.
Patients with no transfusion requirements and a generally good quality of life may be followed by observation alone, with blood counts every 1 to 6 months depending on clinical presentation.
“We have some folks coming in who really don’t have very bad blood counts and have a good quality of life,” Dr. Sekeres said. “Those folks we would consider to have a very good risk type of MDS, which one of my patients referred to once as ‘mild displeasure syndrome.’ It was a displeasure to him to have to fight the traffic to come into Cleveland to see me every month, or 2 months, or 6 months, but beyond that we didn’t have to treat his MDS.”
Isolated cytopenias
Patients with isolated anemia, with hemoglobin less than 10 g/dL and/or transfusion dependence, and who are symptomatic should be started on an erythopoiesis-stimulating agent (ESA), either recombinant humanized erythropoietin or darbepoetin, or the erythroid-maturing agent luspatercept (Reblozyl).
The probability of a response to ESAs in this populations ranges from about 15% to 35%, with patients who have low baseline serum erythropoietin and no or few transfusions most likely to respond.
“On the other hand, patients who come into our clinic who are already dependent on red blood cell transfusions and have a sky-high [erythropoietin] level in the hundreds or even thousands have a very low likelihood of responding to exogenously administered ESAs,” he said.
Patients with no response to ESAs or luspatercept or a loss of response suggestive of disease progression should undergo repeat bone marrow biopsy. Patients who develop deletion 5q should be started on lenalidomide (Revlimid). In these patients, next-generation sequencing may also reveal targetable abnormalities.
For patients with isolated thrombocytopenia, thrombopoietin agonists such as romiplostim or eltrombopag may help to reduce platelet transfusion requirements and clinically significant bleeding events, but these agents come with a very important caveat: in addition to promoting platelet production, thrombopoietin receptor agonists can promote the growth of blasts, which could in turn promote the transformation of MDS to acute myeloid leukemia.
“This is an off-label use of romiplostim for the treatment of MDS with thrombocytopenia, and this drug should never, never, never be given to a patient who has excess blasts at baseline MDS; the same is true of its cousin eltrombopag.” Dr. Sekeres said.
Multlineage dysplasia
Patients with multilineage dysplasia can have good responses to hypomethylating agents, either azacitidine 75 mg/m2 IV or subcutaneously for 3 days every 4 weeks, or decitabine 20 mg/m2 IV for 3 days every 4 weeks.
“Another approach to treating patients with multilineage dysplasia is to consider the use of antithymocyte globulin; in other words, treat these patients as if they have aplastic anemia, because there are some types of MDS in which immune-mediated destruction of bone marrow plays a role,” Dr. Sekeres said.
“This is particularly appealing in patients who have a hyperplastic marrow, or those who have other autoimmune conditions that are going on that may indicate a broader autoimmune process that’s involved in the bone marrow,” he added.
Patients treated with antithymocyte globulin require hospitalization with discharge on steroids for 1 month to prevent serum sickness in response to the treatment, and maintenance on low-dose cyclosporine.
“In MDS, unfortunately, our understanding of the biology of the disease far exceeds what we can do about it, but we’re starting to catch up,” Dr. Sekeres said.
No funding source for the presentation was disclosed. Dr. Sekeres disclosed serving on advisory boards for Celegene/Bristol-Myers Squibb, Takeda/Millenium, and Pfizer.
Clinicians who treat patients with lower-risk myelodysplastic syndrome should focus on “what bugs patients most,” with therapeutic goals reflecting and respecting the patients’ goals, a specialist in MDS recommended.
“There’s an uncomfortable truth in treating lower-risk MDS: No treatment that we have has ever been demonstrated in a prospective trial to prolong survival in lower-risk MDS, so in the end, what we’re doing is trying to improve transfusion needs and to improve quality of life,” said Michael A. Sekeres, MD, MS, from the Cleveland Clinic.
Dr. Sekeres described optimal therapy for patients with lower-risk MDS in an online presentation during the virtual American Society of Hematology Meeting on Hematologic Malignancies.
He acknowledged that the definition of MDS as “a heterogeneous clonal hematopoietic disorder derived from an abnormal multipotent progenitor cell, characterized by a hyperproliferative bone marrow, dysplasia of the cellular elements, and ineffective hematopoiesis” can be confusing even for hematologists well versed in the disorder.
An easier-to-grasp explanation, he said, is that “MDS is considered a cancer, and like other cancers it has a clonal origin, involves the abnormal growth of cells that exceeds the growth of other cells around them and don’t know when to stop growing, and it takes over normal tissue, so that the normal tissues – in this case the hematopoietic precursors in the bone marrow – don’t function normally, resulting in cytopenias.”
‘Mild displeasure syndrome’
Approximately 95% of patients with MDS have a discrete genetic abnormality, but only one driver mutation, in the gene SF3B1, is considered to be a lower-risk abnormality, with a more favorable prognosis.
Treatment options for patients with lower-risk MDS, defined as an International Prognostic Scoring System score of 1 or less, or a Revised IPSS score of 3.5 or less, will depend on the patients’ transfusion needs and quality of life.
Patients with no transfusion requirements and a generally good quality of life may be followed by observation alone, with blood counts every 1 to 6 months depending on clinical presentation.
“We have some folks coming in who really don’t have very bad blood counts and have a good quality of life,” Dr. Sekeres said. “Those folks we would consider to have a very good risk type of MDS, which one of my patients referred to once as ‘mild displeasure syndrome.’ It was a displeasure to him to have to fight the traffic to come into Cleveland to see me every month, or 2 months, or 6 months, but beyond that we didn’t have to treat his MDS.”
Isolated cytopenias
Patients with isolated anemia, with hemoglobin less than 10 g/dL and/or transfusion dependence, and who are symptomatic should be started on an erythopoiesis-stimulating agent (ESA), either recombinant humanized erythropoietin or darbepoetin, or the erythroid-maturing agent luspatercept (Reblozyl).
The probability of a response to ESAs in this populations ranges from about 15% to 35%, with patients who have low baseline serum erythropoietin and no or few transfusions most likely to respond.
“On the other hand, patients who come into our clinic who are already dependent on red blood cell transfusions and have a sky-high [erythropoietin] level in the hundreds or even thousands have a very low likelihood of responding to exogenously administered ESAs,” he said.
Patients with no response to ESAs or luspatercept or a loss of response suggestive of disease progression should undergo repeat bone marrow biopsy. Patients who develop deletion 5q should be started on lenalidomide (Revlimid). In these patients, next-generation sequencing may also reveal targetable abnormalities.
For patients with isolated thrombocytopenia, thrombopoietin agonists such as romiplostim or eltrombopag may help to reduce platelet transfusion requirements and clinically significant bleeding events, but these agents come with a very important caveat: in addition to promoting platelet production, thrombopoietin receptor agonists can promote the growth of blasts, which could in turn promote the transformation of MDS to acute myeloid leukemia.
“This is an off-label use of romiplostim for the treatment of MDS with thrombocytopenia, and this drug should never, never, never be given to a patient who has excess blasts at baseline MDS; the same is true of its cousin eltrombopag.” Dr. Sekeres said.
Multlineage dysplasia
Patients with multilineage dysplasia can have good responses to hypomethylating agents, either azacitidine 75 mg/m2 IV or subcutaneously for 3 days every 4 weeks, or decitabine 20 mg/m2 IV for 3 days every 4 weeks.
“Another approach to treating patients with multilineage dysplasia is to consider the use of antithymocyte globulin; in other words, treat these patients as if they have aplastic anemia, because there are some types of MDS in which immune-mediated destruction of bone marrow plays a role,” Dr. Sekeres said.
“This is particularly appealing in patients who have a hyperplastic marrow, or those who have other autoimmune conditions that are going on that may indicate a broader autoimmune process that’s involved in the bone marrow,” he added.
Patients treated with antithymocyte globulin require hospitalization with discharge on steroids for 1 month to prevent serum sickness in response to the treatment, and maintenance on low-dose cyclosporine.
“In MDS, unfortunately, our understanding of the biology of the disease far exceeds what we can do about it, but we’re starting to catch up,” Dr. Sekeres said.
No funding source for the presentation was disclosed. Dr. Sekeres disclosed serving on advisory boards for Celegene/Bristol-Myers Squibb, Takeda/Millenium, and Pfizer.
Clinicians who treat patients with lower-risk myelodysplastic syndrome should focus on “what bugs patients most,” with therapeutic goals reflecting and respecting the patients’ goals, a specialist in MDS recommended.
“There’s an uncomfortable truth in treating lower-risk MDS: No treatment that we have has ever been demonstrated in a prospective trial to prolong survival in lower-risk MDS, so in the end, what we’re doing is trying to improve transfusion needs and to improve quality of life,” said Michael A. Sekeres, MD, MS, from the Cleveland Clinic.
Dr. Sekeres described optimal therapy for patients with lower-risk MDS in an online presentation during the virtual American Society of Hematology Meeting on Hematologic Malignancies.
He acknowledged that the definition of MDS as “a heterogeneous clonal hematopoietic disorder derived from an abnormal multipotent progenitor cell, characterized by a hyperproliferative bone marrow, dysplasia of the cellular elements, and ineffective hematopoiesis” can be confusing even for hematologists well versed in the disorder.
An easier-to-grasp explanation, he said, is that “MDS is considered a cancer, and like other cancers it has a clonal origin, involves the abnormal growth of cells that exceeds the growth of other cells around them and don’t know when to stop growing, and it takes over normal tissue, so that the normal tissues – in this case the hematopoietic precursors in the bone marrow – don’t function normally, resulting in cytopenias.”
‘Mild displeasure syndrome’
Approximately 95% of patients with MDS have a discrete genetic abnormality, but only one driver mutation, in the gene SF3B1, is considered to be a lower-risk abnormality, with a more favorable prognosis.
Treatment options for patients with lower-risk MDS, defined as an International Prognostic Scoring System score of 1 or less, or a Revised IPSS score of 3.5 or less, will depend on the patients’ transfusion needs and quality of life.
Patients with no transfusion requirements and a generally good quality of life may be followed by observation alone, with blood counts every 1 to 6 months depending on clinical presentation.
“We have some folks coming in who really don’t have very bad blood counts and have a good quality of life,” Dr. Sekeres said. “Those folks we would consider to have a very good risk type of MDS, which one of my patients referred to once as ‘mild displeasure syndrome.’ It was a displeasure to him to have to fight the traffic to come into Cleveland to see me every month, or 2 months, or 6 months, but beyond that we didn’t have to treat his MDS.”
Isolated cytopenias
Patients with isolated anemia, with hemoglobin less than 10 g/dL and/or transfusion dependence, and who are symptomatic should be started on an erythopoiesis-stimulating agent (ESA), either recombinant humanized erythropoietin or darbepoetin, or the erythroid-maturing agent luspatercept (Reblozyl).
The probability of a response to ESAs in this populations ranges from about 15% to 35%, with patients who have low baseline serum erythropoietin and no or few transfusions most likely to respond.
“On the other hand, patients who come into our clinic who are already dependent on red blood cell transfusions and have a sky-high [erythropoietin] level in the hundreds or even thousands have a very low likelihood of responding to exogenously administered ESAs,” he said.
Patients with no response to ESAs or luspatercept or a loss of response suggestive of disease progression should undergo repeat bone marrow biopsy. Patients who develop deletion 5q should be started on lenalidomide (Revlimid). In these patients, next-generation sequencing may also reveal targetable abnormalities.
For patients with isolated thrombocytopenia, thrombopoietin agonists such as romiplostim or eltrombopag may help to reduce platelet transfusion requirements and clinically significant bleeding events, but these agents come with a very important caveat: in addition to promoting platelet production, thrombopoietin receptor agonists can promote the growth of blasts, which could in turn promote the transformation of MDS to acute myeloid leukemia.
“This is an off-label use of romiplostim for the treatment of MDS with thrombocytopenia, and this drug should never, never, never be given to a patient who has excess blasts at baseline MDS; the same is true of its cousin eltrombopag.” Dr. Sekeres said.
Multlineage dysplasia
Patients with multilineage dysplasia can have good responses to hypomethylating agents, either azacitidine 75 mg/m2 IV or subcutaneously for 3 days every 4 weeks, or decitabine 20 mg/m2 IV for 3 days every 4 weeks.
“Another approach to treating patients with multilineage dysplasia is to consider the use of antithymocyte globulin; in other words, treat these patients as if they have aplastic anemia, because there are some types of MDS in which immune-mediated destruction of bone marrow plays a role,” Dr. Sekeres said.
“This is particularly appealing in patients who have a hyperplastic marrow, or those who have other autoimmune conditions that are going on that may indicate a broader autoimmune process that’s involved in the bone marrow,” he added.
Patients treated with antithymocyte globulin require hospitalization with discharge on steroids for 1 month to prevent serum sickness in response to the treatment, and maintenance on low-dose cyclosporine.
“In MDS, unfortunately, our understanding of the biology of the disease far exceeds what we can do about it, but we’re starting to catch up,” Dr. Sekeres said.
No funding source for the presentation was disclosed. Dr. Sekeres disclosed serving on advisory boards for Celegene/Bristol-Myers Squibb, Takeda/Millenium, and Pfizer.
FROM ASH HEMATOLOGIC MALIGNANCIES 2020
Oxidative stress linked to cytogenetic abnormalities in CLL
Oxidative stress may play a role in pathogenesis of B-cell chronic lymphocytic leukemia (B-CLL), according to the results of a biochemical and cytogenetic study of patients published online in Experimental and Molecular Pathology.
The study evaluated the serum levels of oxidative stress biomarkers [conjugated dienes (CD), malondialdehyde (MDA), and nitrite levels] and the levels of antioxidant biomarkers [ceruloplasmin (CP) and glutathione peroxidase (GPx)] in 64 B-CLL patients. The relationship between these biomarkers and the presence of cytogenetic abnormalities was examined, according to Tatiana Zhevak, MD, of Sechenov First Moscow (Russia) State Medical University, and colleagues.
Cytogenetic abnormalities have previously been determined to be linked to a poorer prognosis in CLL patients, and factors that increase the frequency of CA have been shown to increase the risk of rapid tumor progression, Dr. Zhevak and her colleagues stated.
Oxidative stress connection
Enhanced oxidative stress was detected in B-CLL patients as shown by their increased levels of serum CD, MDA, and nitrite, as well as a demonstrated imbalance in the antioxidant defense system as shown by an increased serum CP level and decreased serum GPx activity, according to the researchers.
In addition, these metabolic changes were found to be greater in those patients whose lymphocytes harbored specific cytogenetic abnormalities, and could be predicted by the serum levels of CD. Specifically, the odds of harboring a cytogenetic abnormality increased by a factor of 1.88 (P = .004) for every one-unit increase in serum CD level (mcmol/L), according to the authors.
“Collectively, the results support our hypothesis that oxidative stress and resulting lipid peroxidation play a role in pathogenesis of B-CLL and provide a rational basis for the use of agents regulating the pro-oxidant and antioxidant activity in the treatment of B-CLL patients,” the researchers concluded.
The research was unsponsored and the authors reported having no conflicts.
SOURCE: Zhevak T et al. Exp Mol Patholo. 2020 Oct;16:104524 doi: 10.1016/j.yexmp.2020.104524.
Oxidative stress may play a role in pathogenesis of B-cell chronic lymphocytic leukemia (B-CLL), according to the results of a biochemical and cytogenetic study of patients published online in Experimental and Molecular Pathology.
The study evaluated the serum levels of oxidative stress biomarkers [conjugated dienes (CD), malondialdehyde (MDA), and nitrite levels] and the levels of antioxidant biomarkers [ceruloplasmin (CP) and glutathione peroxidase (GPx)] in 64 B-CLL patients. The relationship between these biomarkers and the presence of cytogenetic abnormalities was examined, according to Tatiana Zhevak, MD, of Sechenov First Moscow (Russia) State Medical University, and colleagues.
Cytogenetic abnormalities have previously been determined to be linked to a poorer prognosis in CLL patients, and factors that increase the frequency of CA have been shown to increase the risk of rapid tumor progression, Dr. Zhevak and her colleagues stated.
Oxidative stress connection
Enhanced oxidative stress was detected in B-CLL patients as shown by their increased levels of serum CD, MDA, and nitrite, as well as a demonstrated imbalance in the antioxidant defense system as shown by an increased serum CP level and decreased serum GPx activity, according to the researchers.
In addition, these metabolic changes were found to be greater in those patients whose lymphocytes harbored specific cytogenetic abnormalities, and could be predicted by the serum levels of CD. Specifically, the odds of harboring a cytogenetic abnormality increased by a factor of 1.88 (P = .004) for every one-unit increase in serum CD level (mcmol/L), according to the authors.
“Collectively, the results support our hypothesis that oxidative stress and resulting lipid peroxidation play a role in pathogenesis of B-CLL and provide a rational basis for the use of agents regulating the pro-oxidant and antioxidant activity in the treatment of B-CLL patients,” the researchers concluded.
The research was unsponsored and the authors reported having no conflicts.
SOURCE: Zhevak T et al. Exp Mol Patholo. 2020 Oct;16:104524 doi: 10.1016/j.yexmp.2020.104524.
Oxidative stress may play a role in pathogenesis of B-cell chronic lymphocytic leukemia (B-CLL), according to the results of a biochemical and cytogenetic study of patients published online in Experimental and Molecular Pathology.
The study evaluated the serum levels of oxidative stress biomarkers [conjugated dienes (CD), malondialdehyde (MDA), and nitrite levels] and the levels of antioxidant biomarkers [ceruloplasmin (CP) and glutathione peroxidase (GPx)] in 64 B-CLL patients. The relationship between these biomarkers and the presence of cytogenetic abnormalities was examined, according to Tatiana Zhevak, MD, of Sechenov First Moscow (Russia) State Medical University, and colleagues.
Cytogenetic abnormalities have previously been determined to be linked to a poorer prognosis in CLL patients, and factors that increase the frequency of CA have been shown to increase the risk of rapid tumor progression, Dr. Zhevak and her colleagues stated.
Oxidative stress connection
Enhanced oxidative stress was detected in B-CLL patients as shown by their increased levels of serum CD, MDA, and nitrite, as well as a demonstrated imbalance in the antioxidant defense system as shown by an increased serum CP level and decreased serum GPx activity, according to the researchers.
In addition, these metabolic changes were found to be greater in those patients whose lymphocytes harbored specific cytogenetic abnormalities, and could be predicted by the serum levels of CD. Specifically, the odds of harboring a cytogenetic abnormality increased by a factor of 1.88 (P = .004) for every one-unit increase in serum CD level (mcmol/L), according to the authors.
“Collectively, the results support our hypothesis that oxidative stress and resulting lipid peroxidation play a role in pathogenesis of B-CLL and provide a rational basis for the use of agents regulating the pro-oxidant and antioxidant activity in the treatment of B-CLL patients,” the researchers concluded.
The research was unsponsored and the authors reported having no conflicts.
SOURCE: Zhevak T et al. Exp Mol Patholo. 2020 Oct;16:104524 doi: 10.1016/j.yexmp.2020.104524.
FROM Experimental and Molecular Pathology
CSF metabolomic profile linked to cancer-related fatigue in children with ALL
Children and adolescents with cancer report significantly more fatigue than their counterparts without cancer, and cancer-related fatigue (CRF) is “one of the most prevalent and distressing symptoms reported during childhood cancer therapy,” according to Austin L. Brown, PhD, and his colleagues.
Cerebrospinal fluid (CSF) profiles suggest three metabolites are significantly associated with CRF in children with acute lymphoblastic leukemia (ALL), according to a report published in the Journal of Pain and Symptom Management.
The researchers assessed the clinical and demographic characteristics of 171 pediatric ALL patients, who were divided into discovery (n = 86) and replication (n = 85) cohorts.
The entire population had a mean age at diagnosis of 8.48 years; was 56.1% male; and 85.4% had B-lineage ALL. A total of 63.7% received high- or very-high-risk treatment.
CSF samples were obtained and subjected to metabolomic analysis, according to Dr. Brown, an assistant professor at the Baylor College of Medicine, Houston, and colleagues.
The researchers analyzed postinduction CSF from the aforementioned 171 patients as well as diagnostic CSF from 48 patients in an additional replication cohort.
Significant metabolites
Analysis of postinduction CSF showed that three metabolites were significantly associated with fatigue in both the discovery and replication cohorts, comprising gamma-glutamylglutamine, dimethylglycine, and asparagine (P < .05).
In diagnostic CSF samples, the abundance of gamma-glutamylglutamine was significantly associated with fatigue (P =.0062).
The metabolites have been implicated in neurotransmitter transportation and glutathione recycling, suggesting glutamatergic pathways or oxidative stress may contribute to ALL-associated CRF, according to the researchers.
“Ultimately, this line of investigation may aid in the development of new prevention and treatment approaches informed by an improved understanding of the etiology and risk factors for cancer-related fatigue,” the researchers concluded.
The study was sponsored by the National Cancer Institute and several nonprofit organizations. The authors reported that they had no conflicts of interest.
SOURCE: Brown AL et al. J Pain Symptom Manage. 2020 Sep 1. doi: 10.1016/j.jpainsymman.2020.08.030.
Children and adolescents with cancer report significantly more fatigue than their counterparts without cancer, and cancer-related fatigue (CRF) is “one of the most prevalent and distressing symptoms reported during childhood cancer therapy,” according to Austin L. Brown, PhD, and his colleagues.
Cerebrospinal fluid (CSF) profiles suggest three metabolites are significantly associated with CRF in children with acute lymphoblastic leukemia (ALL), according to a report published in the Journal of Pain and Symptom Management.
The researchers assessed the clinical and demographic characteristics of 171 pediatric ALL patients, who were divided into discovery (n = 86) and replication (n = 85) cohorts.
The entire population had a mean age at diagnosis of 8.48 years; was 56.1% male; and 85.4% had B-lineage ALL. A total of 63.7% received high- or very-high-risk treatment.
CSF samples were obtained and subjected to metabolomic analysis, according to Dr. Brown, an assistant professor at the Baylor College of Medicine, Houston, and colleagues.
The researchers analyzed postinduction CSF from the aforementioned 171 patients as well as diagnostic CSF from 48 patients in an additional replication cohort.
Significant metabolites
Analysis of postinduction CSF showed that three metabolites were significantly associated with fatigue in both the discovery and replication cohorts, comprising gamma-glutamylglutamine, dimethylglycine, and asparagine (P < .05).
In diagnostic CSF samples, the abundance of gamma-glutamylglutamine was significantly associated with fatigue (P =.0062).
The metabolites have been implicated in neurotransmitter transportation and glutathione recycling, suggesting glutamatergic pathways or oxidative stress may contribute to ALL-associated CRF, according to the researchers.
“Ultimately, this line of investigation may aid in the development of new prevention and treatment approaches informed by an improved understanding of the etiology and risk factors for cancer-related fatigue,” the researchers concluded.
The study was sponsored by the National Cancer Institute and several nonprofit organizations. The authors reported that they had no conflicts of interest.
SOURCE: Brown AL et al. J Pain Symptom Manage. 2020 Sep 1. doi: 10.1016/j.jpainsymman.2020.08.030.
Children and adolescents with cancer report significantly more fatigue than their counterparts without cancer, and cancer-related fatigue (CRF) is “one of the most prevalent and distressing symptoms reported during childhood cancer therapy,” according to Austin L. Brown, PhD, and his colleagues.
Cerebrospinal fluid (CSF) profiles suggest three metabolites are significantly associated with CRF in children with acute lymphoblastic leukemia (ALL), according to a report published in the Journal of Pain and Symptom Management.
The researchers assessed the clinical and demographic characteristics of 171 pediatric ALL patients, who were divided into discovery (n = 86) and replication (n = 85) cohorts.
The entire population had a mean age at diagnosis of 8.48 years; was 56.1% male; and 85.4% had B-lineage ALL. A total of 63.7% received high- or very-high-risk treatment.
CSF samples were obtained and subjected to metabolomic analysis, according to Dr. Brown, an assistant professor at the Baylor College of Medicine, Houston, and colleagues.
The researchers analyzed postinduction CSF from the aforementioned 171 patients as well as diagnostic CSF from 48 patients in an additional replication cohort.
Significant metabolites
Analysis of postinduction CSF showed that three metabolites were significantly associated with fatigue in both the discovery and replication cohorts, comprising gamma-glutamylglutamine, dimethylglycine, and asparagine (P < .05).
In diagnostic CSF samples, the abundance of gamma-glutamylglutamine was significantly associated with fatigue (P =.0062).
The metabolites have been implicated in neurotransmitter transportation and glutathione recycling, suggesting glutamatergic pathways or oxidative stress may contribute to ALL-associated CRF, according to the researchers.
“Ultimately, this line of investigation may aid in the development of new prevention and treatment approaches informed by an improved understanding of the etiology and risk factors for cancer-related fatigue,” the researchers concluded.
The study was sponsored by the National Cancer Institute and several nonprofit organizations. The authors reported that they had no conflicts of interest.
SOURCE: Brown AL et al. J Pain Symptom Manage. 2020 Sep 1. doi: 10.1016/j.jpainsymman.2020.08.030.
FROM THE JOURNAL OF PAIN AND SYMPTOM MANAGEMENT
Hair dye and cancer study ‘offers some reassurance’
Findings limited to White women in United States
The largest study of its kind has found no positive association between personal use of permanent hair dye and the risk for most cancers and cancer mortality.
The findings come from the Nurses’ Health Study, an ongoing prospective cohort study of more than 117,000 women who have been followed for 36 years and who did not have cancer at baseline.
The findings were published online on September 2 in the BMJ.
The results “offer some reassurance against concerns that personal use of permanent hair dyes might be associated with increased cancer risk or mortality,” write the investigators, with first author Yin Zhang, PhD, of Harvard Medical School, Boston.
The findings, which are limited to White women in the United States, indicate correlation, not causation, the authors emphasize.
Nevertheless, the researchers found an increased risk for some cancers among hair dye users, especially with greater cumulative dose (200 or more uses during the study period). The risk was increased for basal cell carcinoma, breast cancer (specifically, estrogen receptor negative [ER–], progesterone receptor negative [PR–], and hormone receptor negative [ER–, PR–]), and ovarian cancer.
A British expert not involved in the study dismissed these findings. “The reported associations are very weak, and, given the number of associations reported in this manuscript, they are very likely to be chance findings,” commented Paul Pharoah, PhD, professor of cancer epidemiology at the University of Cambridge (England).
“For the cancers where an increase in risk is reported, the results are not compelling. Even if they were real findings, the associations may not be cause-and-effect, and, even if they were causal associations, the magnitude of the effects are so small that any risk would be trivial.
“In short, none of the findings reported in this manuscript suggest that women who use hair dye are putting themselves at increased risk of cancer,” he stated.
A U.S. researcher who has previously coauthored a study suggesting an association between hair dye and breast cancer agreed that the increases in risk reported in this current study are “small.” But they are “of interest,” especially for breast and ovarian cancer, said Alexandra White, PhD, of the National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, N.C.
Hair dyes include compounds that “are not just potential carcinogens but also act as endocrine disruptors,” she said in an interview.
“In both breast and ovarian cancer, we know that hormones play an important part in the etiology ... so it’s biologically plausible that you would see [these associations in the current study],” added Dr. White, who was approached for comment.
However, she added that, even with the “modest” 20%-28% increase in the relative risk for certain breast cancers linked to a heavy cumulative dose of dyes in the current study, “there doesn’t seem to be any strong association with any cancer type.”
But she also pointed out that the most outstanding risk association was among ER–/PR– breast cancers, which are the “most aggressive and difficult to treat,” and thus the new findings are “important.”
Dr. White is the lead author of a 2019 study that received a lot of media attention because it rang an alarm bell about hair dyes and breast cancer risk.
That study concluded that ever using permanent hair dye or hair straighteners was associated with a higher risk for breast cancer than never using them and that this higher risk was especially associated with Black women. However, the study participants were from the prospective Sister Study. The participants in that study had no history of breast cancer, but they each had at least one sister who did. This family history of breast cancer may represent selection bias.
With changes in the 1980s, even safer now?
The study of hair dyes and cancer has “major public health implications” because the use of hair dye is widespread, Dr. Zhang and colleagues write in their article. They estimate that 50% to 80% of women and 10% of men aged 40 years and older in the United States and Europe use hair dye.
Permanent hair dyes “pose the greatest potential concern,” they stated, adding that these account for approximately 80% of hair dyes used in the United States and Europe and an even higher percentage in Asia.
The International Agency for Research on Cancer classifies occupational exposure to hair dyes as probably carcinogenic, but the carcinogenicity resulting from personal use of hair dyes is not classifiable – thus, there is no warning about at-home usage.
Notably, there was “a huge and very important” change in hair dye ingredients in the 1980s after the Food and Drug Administration warned about some chemicals in permanent hair dyes and the cosmetic industry altered their formulas, lead author Dr. Zhang said.
However, the researchers could not analyze use before and after the changes because not enough women reported first use of permanent hair dye after 1980 (only 1890 of 117,200 participants).
“We could expect that the current ingredients should make it safer,” Dr. Zhang said.
Study details
The researchers report that ever-users of permanent hair dyes had no significant increases in risk for solid cancers (n = 20,805; hazard ratio, 0.98, 95% confidence interval, 0.96-1.01) or hematopoietic cancers overall (n = 1,807; HR, 1.00; 95% CI, 0.91-1.10) compared with nonusers.
Additionally, ever-users did not have an increased risk for most specific cancers or cancer-related death (n = 4,860; HR, 0.96; 95% CI, 0.91-1.02).
As noted above, there were some exceptions.
Basal cell carcinoma risk was slightly increased for ever-users (n = 22,560; HR, 1.05; 95% CI, 1.02-1.08). Cumulative dose (a calculation of duration and frequency) was positively associated with risk for ER– breast cancer, PR– breast cancer, ER–/PR– breast cancer, and ovarian cancer, with risk rising in accordance with the total amount of dye.
Notably, at a cumulative dose of ≥200 uses, there was a 20% increase in the relative risk for ER- breast cancer (n = 1521; HR, 1.20; 95% CI, 1.02-1.41; P value for trend, .03). At the same cumulative dose, there was a 28% increase in the relative risk for ER-/PR- breast cancer (n = 1287; HR, 1.28, 95% CI, 1.08-1.52; P value for trend, .006).
In addition, an increased risk for Hodgkin lymphoma was observed, but only for women with naturally dark hair (the calculation was based on 70 women, 24 of whom had dark hair).
In a press statement, senior author Eva Schernhammer, PhD, of Harvard and the Medical University of Vienna, said the results “justify further prospective validation.”
She also explained that there are many variables to consider in this research, including different populations and countries, different susceptibility genotypes, different exposure settings (personal use vs. occupational exposure), and different colors of the permanent hair dyes used (dark dyes vs. light dyes).
Geographic location is a particularly important variable, suggested the study authors.
They pointed out that Europe, but not the United States, banned some individual hair dye ingredients that were considered carcinogenic during both the 1980s and 2000s. One country has even tighter oversight: “The most restrictive regulation of hair dyes exists in Japan, where cosmetic products are considered equivalent to drugs.”
The study was funded by the Centers for Disease Control and Prevention and the National Institute for Occupational Safety and Health. The study authors and Dr. White have disclosed no relevant financial relationships.
This article first appeared on Medscape.com.
Findings limited to White women in United States
Findings limited to White women in United States
The largest study of its kind has found no positive association between personal use of permanent hair dye and the risk for most cancers and cancer mortality.
The findings come from the Nurses’ Health Study, an ongoing prospective cohort study of more than 117,000 women who have been followed for 36 years and who did not have cancer at baseline.
The findings were published online on September 2 in the BMJ.
The results “offer some reassurance against concerns that personal use of permanent hair dyes might be associated with increased cancer risk or mortality,” write the investigators, with first author Yin Zhang, PhD, of Harvard Medical School, Boston.
The findings, which are limited to White women in the United States, indicate correlation, not causation, the authors emphasize.
Nevertheless, the researchers found an increased risk for some cancers among hair dye users, especially with greater cumulative dose (200 or more uses during the study period). The risk was increased for basal cell carcinoma, breast cancer (specifically, estrogen receptor negative [ER–], progesterone receptor negative [PR–], and hormone receptor negative [ER–, PR–]), and ovarian cancer.
A British expert not involved in the study dismissed these findings. “The reported associations are very weak, and, given the number of associations reported in this manuscript, they are very likely to be chance findings,” commented Paul Pharoah, PhD, professor of cancer epidemiology at the University of Cambridge (England).
“For the cancers where an increase in risk is reported, the results are not compelling. Even if they were real findings, the associations may not be cause-and-effect, and, even if they were causal associations, the magnitude of the effects are so small that any risk would be trivial.
“In short, none of the findings reported in this manuscript suggest that women who use hair dye are putting themselves at increased risk of cancer,” he stated.
A U.S. researcher who has previously coauthored a study suggesting an association between hair dye and breast cancer agreed that the increases in risk reported in this current study are “small.” But they are “of interest,” especially for breast and ovarian cancer, said Alexandra White, PhD, of the National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, N.C.
Hair dyes include compounds that “are not just potential carcinogens but also act as endocrine disruptors,” she said in an interview.
“In both breast and ovarian cancer, we know that hormones play an important part in the etiology ... so it’s biologically plausible that you would see [these associations in the current study],” added Dr. White, who was approached for comment.
However, she added that, even with the “modest” 20%-28% increase in the relative risk for certain breast cancers linked to a heavy cumulative dose of dyes in the current study, “there doesn’t seem to be any strong association with any cancer type.”
But she also pointed out that the most outstanding risk association was among ER–/PR– breast cancers, which are the “most aggressive and difficult to treat,” and thus the new findings are “important.”
Dr. White is the lead author of a 2019 study that received a lot of media attention because it rang an alarm bell about hair dyes and breast cancer risk.
That study concluded that ever using permanent hair dye or hair straighteners was associated with a higher risk for breast cancer than never using them and that this higher risk was especially associated with Black women. However, the study participants were from the prospective Sister Study. The participants in that study had no history of breast cancer, but they each had at least one sister who did. This family history of breast cancer may represent selection bias.
With changes in the 1980s, even safer now?
The study of hair dyes and cancer has “major public health implications” because the use of hair dye is widespread, Dr. Zhang and colleagues write in their article. They estimate that 50% to 80% of women and 10% of men aged 40 years and older in the United States and Europe use hair dye.
Permanent hair dyes “pose the greatest potential concern,” they stated, adding that these account for approximately 80% of hair dyes used in the United States and Europe and an even higher percentage in Asia.
The International Agency for Research on Cancer classifies occupational exposure to hair dyes as probably carcinogenic, but the carcinogenicity resulting from personal use of hair dyes is not classifiable – thus, there is no warning about at-home usage.
Notably, there was “a huge and very important” change in hair dye ingredients in the 1980s after the Food and Drug Administration warned about some chemicals in permanent hair dyes and the cosmetic industry altered their formulas, lead author Dr. Zhang said.
However, the researchers could not analyze use before and after the changes because not enough women reported first use of permanent hair dye after 1980 (only 1890 of 117,200 participants).
“We could expect that the current ingredients should make it safer,” Dr. Zhang said.
Study details
The researchers report that ever-users of permanent hair dyes had no significant increases in risk for solid cancers (n = 20,805; hazard ratio, 0.98, 95% confidence interval, 0.96-1.01) or hematopoietic cancers overall (n = 1,807; HR, 1.00; 95% CI, 0.91-1.10) compared with nonusers.
Additionally, ever-users did not have an increased risk for most specific cancers or cancer-related death (n = 4,860; HR, 0.96; 95% CI, 0.91-1.02).
As noted above, there were some exceptions.
Basal cell carcinoma risk was slightly increased for ever-users (n = 22,560; HR, 1.05; 95% CI, 1.02-1.08). Cumulative dose (a calculation of duration and frequency) was positively associated with risk for ER– breast cancer, PR– breast cancer, ER–/PR– breast cancer, and ovarian cancer, with risk rising in accordance with the total amount of dye.
Notably, at a cumulative dose of ≥200 uses, there was a 20% increase in the relative risk for ER- breast cancer (n = 1521; HR, 1.20; 95% CI, 1.02-1.41; P value for trend, .03). At the same cumulative dose, there was a 28% increase in the relative risk for ER-/PR- breast cancer (n = 1287; HR, 1.28, 95% CI, 1.08-1.52; P value for trend, .006).
In addition, an increased risk for Hodgkin lymphoma was observed, but only for women with naturally dark hair (the calculation was based on 70 women, 24 of whom had dark hair).
In a press statement, senior author Eva Schernhammer, PhD, of Harvard and the Medical University of Vienna, said the results “justify further prospective validation.”
She also explained that there are many variables to consider in this research, including different populations and countries, different susceptibility genotypes, different exposure settings (personal use vs. occupational exposure), and different colors of the permanent hair dyes used (dark dyes vs. light dyes).
Geographic location is a particularly important variable, suggested the study authors.
They pointed out that Europe, but not the United States, banned some individual hair dye ingredients that were considered carcinogenic during both the 1980s and 2000s. One country has even tighter oversight: “The most restrictive regulation of hair dyes exists in Japan, where cosmetic products are considered equivalent to drugs.”
The study was funded by the Centers for Disease Control and Prevention and the National Institute for Occupational Safety and Health. The study authors and Dr. White have disclosed no relevant financial relationships.
This article first appeared on Medscape.com.
The largest study of its kind has found no positive association between personal use of permanent hair dye and the risk for most cancers and cancer mortality.
The findings come from the Nurses’ Health Study, an ongoing prospective cohort study of more than 117,000 women who have been followed for 36 years and who did not have cancer at baseline.
The findings were published online on September 2 in the BMJ.
The results “offer some reassurance against concerns that personal use of permanent hair dyes might be associated with increased cancer risk or mortality,” write the investigators, with first author Yin Zhang, PhD, of Harvard Medical School, Boston.
The findings, which are limited to White women in the United States, indicate correlation, not causation, the authors emphasize.
Nevertheless, the researchers found an increased risk for some cancers among hair dye users, especially with greater cumulative dose (200 or more uses during the study period). The risk was increased for basal cell carcinoma, breast cancer (specifically, estrogen receptor negative [ER–], progesterone receptor negative [PR–], and hormone receptor negative [ER–, PR–]), and ovarian cancer.
A British expert not involved in the study dismissed these findings. “The reported associations are very weak, and, given the number of associations reported in this manuscript, they are very likely to be chance findings,” commented Paul Pharoah, PhD, professor of cancer epidemiology at the University of Cambridge (England).
“For the cancers where an increase in risk is reported, the results are not compelling. Even if they were real findings, the associations may not be cause-and-effect, and, even if they were causal associations, the magnitude of the effects are so small that any risk would be trivial.
“In short, none of the findings reported in this manuscript suggest that women who use hair dye are putting themselves at increased risk of cancer,” he stated.
A U.S. researcher who has previously coauthored a study suggesting an association between hair dye and breast cancer agreed that the increases in risk reported in this current study are “small.” But they are “of interest,” especially for breast and ovarian cancer, said Alexandra White, PhD, of the National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, N.C.
Hair dyes include compounds that “are not just potential carcinogens but also act as endocrine disruptors,” she said in an interview.
“In both breast and ovarian cancer, we know that hormones play an important part in the etiology ... so it’s biologically plausible that you would see [these associations in the current study],” added Dr. White, who was approached for comment.
However, she added that, even with the “modest” 20%-28% increase in the relative risk for certain breast cancers linked to a heavy cumulative dose of dyes in the current study, “there doesn’t seem to be any strong association with any cancer type.”
But she also pointed out that the most outstanding risk association was among ER–/PR– breast cancers, which are the “most aggressive and difficult to treat,” and thus the new findings are “important.”
Dr. White is the lead author of a 2019 study that received a lot of media attention because it rang an alarm bell about hair dyes and breast cancer risk.
That study concluded that ever using permanent hair dye or hair straighteners was associated with a higher risk for breast cancer than never using them and that this higher risk was especially associated with Black women. However, the study participants were from the prospective Sister Study. The participants in that study had no history of breast cancer, but they each had at least one sister who did. This family history of breast cancer may represent selection bias.
With changes in the 1980s, even safer now?
The study of hair dyes and cancer has “major public health implications” because the use of hair dye is widespread, Dr. Zhang and colleagues write in their article. They estimate that 50% to 80% of women and 10% of men aged 40 years and older in the United States and Europe use hair dye.
Permanent hair dyes “pose the greatest potential concern,” they stated, adding that these account for approximately 80% of hair dyes used in the United States and Europe and an even higher percentage in Asia.
The International Agency for Research on Cancer classifies occupational exposure to hair dyes as probably carcinogenic, but the carcinogenicity resulting from personal use of hair dyes is not classifiable – thus, there is no warning about at-home usage.
Notably, there was “a huge and very important” change in hair dye ingredients in the 1980s after the Food and Drug Administration warned about some chemicals in permanent hair dyes and the cosmetic industry altered their formulas, lead author Dr. Zhang said.
However, the researchers could not analyze use before and after the changes because not enough women reported first use of permanent hair dye after 1980 (only 1890 of 117,200 participants).
“We could expect that the current ingredients should make it safer,” Dr. Zhang said.
Study details
The researchers report that ever-users of permanent hair dyes had no significant increases in risk for solid cancers (n = 20,805; hazard ratio, 0.98, 95% confidence interval, 0.96-1.01) or hematopoietic cancers overall (n = 1,807; HR, 1.00; 95% CI, 0.91-1.10) compared with nonusers.
Additionally, ever-users did not have an increased risk for most specific cancers or cancer-related death (n = 4,860; HR, 0.96; 95% CI, 0.91-1.02).
As noted above, there were some exceptions.
Basal cell carcinoma risk was slightly increased for ever-users (n = 22,560; HR, 1.05; 95% CI, 1.02-1.08). Cumulative dose (a calculation of duration and frequency) was positively associated with risk for ER– breast cancer, PR– breast cancer, ER–/PR– breast cancer, and ovarian cancer, with risk rising in accordance with the total amount of dye.
Notably, at a cumulative dose of ≥200 uses, there was a 20% increase in the relative risk for ER- breast cancer (n = 1521; HR, 1.20; 95% CI, 1.02-1.41; P value for trend, .03). At the same cumulative dose, there was a 28% increase in the relative risk for ER-/PR- breast cancer (n = 1287; HR, 1.28, 95% CI, 1.08-1.52; P value for trend, .006).
In addition, an increased risk for Hodgkin lymphoma was observed, but only for women with naturally dark hair (the calculation was based on 70 women, 24 of whom had dark hair).
In a press statement, senior author Eva Schernhammer, PhD, of Harvard and the Medical University of Vienna, said the results “justify further prospective validation.”
She also explained that there are many variables to consider in this research, including different populations and countries, different susceptibility genotypes, different exposure settings (personal use vs. occupational exposure), and different colors of the permanent hair dyes used (dark dyes vs. light dyes).
Geographic location is a particularly important variable, suggested the study authors.
They pointed out that Europe, but not the United States, banned some individual hair dye ingredients that were considered carcinogenic during both the 1980s and 2000s. One country has even tighter oversight: “The most restrictive regulation of hair dyes exists in Japan, where cosmetic products are considered equivalent to drugs.”
The study was funded by the Centers for Disease Control and Prevention and the National Institute for Occupational Safety and Health. The study authors and Dr. White have disclosed no relevant financial relationships.
This article first appeared on Medscape.com.
FDA approves first maintenance therapy for AML
The Food and Drug Administration has approved an oral form of azacitidine (Onureg) for use as maintenance therapy for patients with acute myeloid leukemia (AML) who have achieved a first complete remission.
The approval extends to patients who have achieved complete remission with incomplete blood count recovery following intensive induction chemotherapy and who are unable to complete intensive curative therapy.
The approval was based on data from the QUAZAR AML-001 trial, which showed that oral azacitidine significantly improved overall survival when compared with placebo.
“It’s not too hard to get these patients into remission,” Harry P. Erba, MD, PhD, director of the Leukemia Program at the Duke Cancer Institute, Durham, N.C., said in an interview last year when these results were first presented at the 2019 annual meeting of the American Society of Hematology. “The problem comes in keeping them in remission.”
Despite various attempts, there has been no success over the past 30 years in defining maintenance treatment for these patients, Andrew H. Wei, MBBS, PhD, from the Alfred Hospital in Melbourne, Australia, said.
“Oral azacitidine represents a new therapeutic standard for patients with AML in remission,” he said.
Azacitidine is a hypomethylating agent that incorporates into DNA and RNA. It has long been used as an injectable therapy for the treatment of myelodysplastic syndromes.
The approval of the new oral formulation for the new indication of AML “is the culmination of over a decade of research and 13 preclinical and clinical trials,” said Giovanni Caforio, M.D., chairman and chief executive officer of Bristol-Myers Squibb, in a statement.
QUAZAR results
The QUAZAR AML-001 trial was a phase 3, international study involving 472 patients with AML who were within achieving a first complete remission or remission with incomplete blood recovery. All patients had received intensive induction chemotherapy with or without consolidation treatment per investigator preference prior to study entry and were not candidates for hematopoietic stem cell transplant at the time of screening.
Patients were randomly assigned to receive either oral azacitidine 200 mg daily on days 1-14 of a repeat 28-day cycle (n = 278) or matching placebo (n = 274). Treatment was continued indefinitely until blast count was more than 15% or patients experienced unacceptable toxicity or underwent transplant.
At a median follow-up of more than 41.2 months, the median overall survival was significantly longer for patients who received oral azacitidine at 24.7 months versus 14.8 months for those who received placebo (hazard ratio, 0.69; P < .0009).
Relapse-free survival was also significantly prolonged to 10.2 months for patients who received oral azacitidine vs. 4.8 months for those who received placebo (HR, 0.65; P < .0001).
Serious adverse reactions occurred in 15% of patients who received azacitidine. Events that occurred in 2% of patients or more include pneumonia (8%) and febrile neutropenia (7%). There was one fatal event.
The most common adverse reactions were nausea (65% vs. 24%), vomiting (60% vs. 10%), diarrhea (50% vs. 21%), fatigue/asthenia (44% vs. 25%), constipation (39% vs. 24%), pneumonia (27% vs. 17%), abdominal pain (22% vs. 13%) arthralgia (14% vs. 10%), decreased appetite (13% vs. 6%), febrile neutropenia (12% vs. 8%), dizziness (11% vs. 9%), and pain in extremity (11% vs. 5%). Permanent discontinuation because of an adverse reaction occurred in 8% of patients.
A version of this article originally appeared on Medscape.com.
The Food and Drug Administration has approved an oral form of azacitidine (Onureg) for use as maintenance therapy for patients with acute myeloid leukemia (AML) who have achieved a first complete remission.
The approval extends to patients who have achieved complete remission with incomplete blood count recovery following intensive induction chemotherapy and who are unable to complete intensive curative therapy.
The approval was based on data from the QUAZAR AML-001 trial, which showed that oral azacitidine significantly improved overall survival when compared with placebo.
“It’s not too hard to get these patients into remission,” Harry P. Erba, MD, PhD, director of the Leukemia Program at the Duke Cancer Institute, Durham, N.C., said in an interview last year when these results were first presented at the 2019 annual meeting of the American Society of Hematology. “The problem comes in keeping them in remission.”
Despite various attempts, there has been no success over the past 30 years in defining maintenance treatment for these patients, Andrew H. Wei, MBBS, PhD, from the Alfred Hospital in Melbourne, Australia, said.
“Oral azacitidine represents a new therapeutic standard for patients with AML in remission,” he said.
Azacitidine is a hypomethylating agent that incorporates into DNA and RNA. It has long been used as an injectable therapy for the treatment of myelodysplastic syndromes.
The approval of the new oral formulation for the new indication of AML “is the culmination of over a decade of research and 13 preclinical and clinical trials,” said Giovanni Caforio, M.D., chairman and chief executive officer of Bristol-Myers Squibb, in a statement.
QUAZAR results
The QUAZAR AML-001 trial was a phase 3, international study involving 472 patients with AML who were within achieving a first complete remission or remission with incomplete blood recovery. All patients had received intensive induction chemotherapy with or without consolidation treatment per investigator preference prior to study entry and were not candidates for hematopoietic stem cell transplant at the time of screening.
Patients were randomly assigned to receive either oral azacitidine 200 mg daily on days 1-14 of a repeat 28-day cycle (n = 278) or matching placebo (n = 274). Treatment was continued indefinitely until blast count was more than 15% or patients experienced unacceptable toxicity or underwent transplant.
At a median follow-up of more than 41.2 months, the median overall survival was significantly longer for patients who received oral azacitidine at 24.7 months versus 14.8 months for those who received placebo (hazard ratio, 0.69; P < .0009).
Relapse-free survival was also significantly prolonged to 10.2 months for patients who received oral azacitidine vs. 4.8 months for those who received placebo (HR, 0.65; P < .0001).
Serious adverse reactions occurred in 15% of patients who received azacitidine. Events that occurred in 2% of patients or more include pneumonia (8%) and febrile neutropenia (7%). There was one fatal event.
The most common adverse reactions were nausea (65% vs. 24%), vomiting (60% vs. 10%), diarrhea (50% vs. 21%), fatigue/asthenia (44% vs. 25%), constipation (39% vs. 24%), pneumonia (27% vs. 17%), abdominal pain (22% vs. 13%) arthralgia (14% vs. 10%), decreased appetite (13% vs. 6%), febrile neutropenia (12% vs. 8%), dizziness (11% vs. 9%), and pain in extremity (11% vs. 5%). Permanent discontinuation because of an adverse reaction occurred in 8% of patients.
A version of this article originally appeared on Medscape.com.
The Food and Drug Administration has approved an oral form of azacitidine (Onureg) for use as maintenance therapy for patients with acute myeloid leukemia (AML) who have achieved a first complete remission.
The approval extends to patients who have achieved complete remission with incomplete blood count recovery following intensive induction chemotherapy and who are unable to complete intensive curative therapy.
The approval was based on data from the QUAZAR AML-001 trial, which showed that oral azacitidine significantly improved overall survival when compared with placebo.
“It’s not too hard to get these patients into remission,” Harry P. Erba, MD, PhD, director of the Leukemia Program at the Duke Cancer Institute, Durham, N.C., said in an interview last year when these results were first presented at the 2019 annual meeting of the American Society of Hematology. “The problem comes in keeping them in remission.”
Despite various attempts, there has been no success over the past 30 years in defining maintenance treatment for these patients, Andrew H. Wei, MBBS, PhD, from the Alfred Hospital in Melbourne, Australia, said.
“Oral azacitidine represents a new therapeutic standard for patients with AML in remission,” he said.
Azacitidine is a hypomethylating agent that incorporates into DNA and RNA. It has long been used as an injectable therapy for the treatment of myelodysplastic syndromes.
The approval of the new oral formulation for the new indication of AML “is the culmination of over a decade of research and 13 preclinical and clinical trials,” said Giovanni Caforio, M.D., chairman and chief executive officer of Bristol-Myers Squibb, in a statement.
QUAZAR results
The QUAZAR AML-001 trial was a phase 3, international study involving 472 patients with AML who were within achieving a first complete remission or remission with incomplete blood recovery. All patients had received intensive induction chemotherapy with or without consolidation treatment per investigator preference prior to study entry and were not candidates for hematopoietic stem cell transplant at the time of screening.
Patients were randomly assigned to receive either oral azacitidine 200 mg daily on days 1-14 of a repeat 28-day cycle (n = 278) or matching placebo (n = 274). Treatment was continued indefinitely until blast count was more than 15% or patients experienced unacceptable toxicity or underwent transplant.
At a median follow-up of more than 41.2 months, the median overall survival was significantly longer for patients who received oral azacitidine at 24.7 months versus 14.8 months for those who received placebo (hazard ratio, 0.69; P < .0009).
Relapse-free survival was also significantly prolonged to 10.2 months for patients who received oral azacitidine vs. 4.8 months for those who received placebo (HR, 0.65; P < .0001).
Serious adverse reactions occurred in 15% of patients who received azacitidine. Events that occurred in 2% of patients or more include pneumonia (8%) and febrile neutropenia (7%). There was one fatal event.
The most common adverse reactions were nausea (65% vs. 24%), vomiting (60% vs. 10%), diarrhea (50% vs. 21%), fatigue/asthenia (44% vs. 25%), constipation (39% vs. 24%), pneumonia (27% vs. 17%), abdominal pain (22% vs. 13%) arthralgia (14% vs. 10%), decreased appetite (13% vs. 6%), febrile neutropenia (12% vs. 8%), dizziness (11% vs. 9%), and pain in extremity (11% vs. 5%). Permanent discontinuation because of an adverse reaction occurred in 8% of patients.
A version of this article originally appeared on Medscape.com.
Sequential Targeted Treatment of an Elderly Patient With Acute Myeloid Leukemia Harboring Concurrent FLT3-TKD and IDH1 Mutations: A Case Report
INTRODUCTION: With the increasing availability of novel targeted therapies and next-generation sequencing (NGS) hematology panels, the treatment paradigm for patients with acute myeloid leukemia (AML) has recently been altered. Specifically, patients who bear mutations within the FMS-like tyrosine kinase (FLT3) gene or the isocitrate dehydrogenase (IDH) 1 or IDH2 genes may now be candidates for targeted treatments either in the frontline or relapsed or refractory (R/R) settings. The sequential targeted approach to AML patients who harbor mutations within both FLT3 and IDH genes has yet to be elucidated.
CASE PRESENTATION: Herein, we report a case of an elderly patient with FLT3 and IDH1 mutations who underwent induction chemotherapy in combination with midostaurin, and subsequently, ivosidenib in the R/R setting. Clonal evaluation was demonstrated with repeated cytogenetic analysis and NGS of blood and bone marrow specimens. At diagnosis, the patient’s AML harbored several pathogenic gene variants, including FLT3 and IDH1 mutations. Following induction chemotherapy with midostaurin, the patient’s FLT3 mutation was no longer detected. Upon relapse, the FLT3 mutation was still undetectable, however the IDH1 mutation remained. Unfortunately, the patient’s AML did not respond to ivosidenib, and expansion of a leukemic clone with a BCOR mutation was observed.
CONCLUSION: This case conveys the use of multiple targeted therapies in a sequential fashion for an AML patient with frequent completion of NGS panels to monitor clonal evolution. Given that a considerable minority of patients harbor both FLT3 and IDH mutations, further investigations evaluating optimal sequencing or combinations of targeted therapies are required.
INTRODUCTION: With the increasing availability of novel targeted therapies and next-generation sequencing (NGS) hematology panels, the treatment paradigm for patients with acute myeloid leukemia (AML) has recently been altered. Specifically, patients who bear mutations within the FMS-like tyrosine kinase (FLT3) gene or the isocitrate dehydrogenase (IDH) 1 or IDH2 genes may now be candidates for targeted treatments either in the frontline or relapsed or refractory (R/R) settings. The sequential targeted approach to AML patients who harbor mutations within both FLT3 and IDH genes has yet to be elucidated.
CASE PRESENTATION: Herein, we report a case of an elderly patient with FLT3 and IDH1 mutations who underwent induction chemotherapy in combination with midostaurin, and subsequently, ivosidenib in the R/R setting. Clonal evaluation was demonstrated with repeated cytogenetic analysis and NGS of blood and bone marrow specimens. At diagnosis, the patient’s AML harbored several pathogenic gene variants, including FLT3 and IDH1 mutations. Following induction chemotherapy with midostaurin, the patient’s FLT3 mutation was no longer detected. Upon relapse, the FLT3 mutation was still undetectable, however the IDH1 mutation remained. Unfortunately, the patient’s AML did not respond to ivosidenib, and expansion of a leukemic clone with a BCOR mutation was observed.
CONCLUSION: This case conveys the use of multiple targeted therapies in a sequential fashion for an AML patient with frequent completion of NGS panels to monitor clonal evolution. Given that a considerable minority of patients harbor both FLT3 and IDH mutations, further investigations evaluating optimal sequencing or combinations of targeted therapies are required.
INTRODUCTION: With the increasing availability of novel targeted therapies and next-generation sequencing (NGS) hematology panels, the treatment paradigm for patients with acute myeloid leukemia (AML) has recently been altered. Specifically, patients who bear mutations within the FMS-like tyrosine kinase (FLT3) gene or the isocitrate dehydrogenase (IDH) 1 or IDH2 genes may now be candidates for targeted treatments either in the frontline or relapsed or refractory (R/R) settings. The sequential targeted approach to AML patients who harbor mutations within both FLT3 and IDH genes has yet to be elucidated.
CASE PRESENTATION: Herein, we report a case of an elderly patient with FLT3 and IDH1 mutations who underwent induction chemotherapy in combination with midostaurin, and subsequently, ivosidenib in the R/R setting. Clonal evaluation was demonstrated with repeated cytogenetic analysis and NGS of blood and bone marrow specimens. At diagnosis, the patient’s AML harbored several pathogenic gene variants, including FLT3 and IDH1 mutations. Following induction chemotherapy with midostaurin, the patient’s FLT3 mutation was no longer detected. Upon relapse, the FLT3 mutation was still undetectable, however the IDH1 mutation remained. Unfortunately, the patient’s AML did not respond to ivosidenib, and expansion of a leukemic clone with a BCOR mutation was observed.
CONCLUSION: This case conveys the use of multiple targeted therapies in a sequential fashion for an AML patient with frequent completion of NGS panels to monitor clonal evolution. Given that a considerable minority of patients harbor both FLT3 and IDH mutations, further investigations evaluating optimal sequencing or combinations of targeted therapies are required.
Review of Efficacy and Safety Outcomes of Ibrutinib in a Veteran Population with Chronic Lymphocytic Leukemia
BACKGROUND/RATIONALE: Chronic lymphocytic leukemia (CLL) and Small Lymphocytic Lymphoma (SLL) are indolent hematologic malignancies that account for one-quarter of all lymphomas primarily affecting older patients. Survival has improved due to the development of novel oral drugs with 85.1% 5-year survival in 2019. Ibrutinib is an oral Bruton’s tyrosine kinase inhibitor that interferes with malignant B-cell proliferation and survival. The National Comprehensive Cancer Network recommends ibrutinib as a category one treatment recommendation in all settings of CLL including relapsed/refractory disease and adverse cytogenetics. This study aims to improve clinical knowledge of ibrutinib’s efficacy and safety in a Veteran population.
OBJECTIVES: The primary objective was to determine the efficacy of ibrutinib in the Veteran population as defined by progression-free survival. Secondary objectives included overall survival, overall response, duration of therapy, and prevalence of adverse drug reactions.
METHODS: This was a single center, retrospective study conducted at the Southern Arizona VA Health Care System. A retrospective chart review of patients age 18-89 with CLL or SLL treated with ibrutinib between November 1st, 2013 to August 1st, 2019 was conducted. The Kaplan-Meier method was used to estimate overall survival and progression-free survival. Descriptive statistics was used for all other endpoints. RESULTS: Twenty-three patients were included in this study. Progression free survival and overall survival at 63 months (5.25 years) was 68.2% and 72.7%, respectively. The average duration of therapy was 20.3 months with 65.2% achieving partial response, 17.3% with stable disease, and 17.3% with progression of disease. The most common adverse events were gastrointestinal (21.7%) and cardiac (17.4%) including 3 patients who developed atrial fibrillation; 34.7% of patients required a dose reduction due to toxicity.
CONCLUSION: Use of ibrutinib in the Veteran population had similar progression-free survival as the clinical trials that led to its approval; however, slightly lower overall survival was noted compared to the clinical trials. The rate of atrial fibrillation was higher in the Veteran population compared to clinical trials, whereas the prevalence of gastrointestinal, dermatologic, neurologic, and musculoskeletal adverse events was consistent with published data.
BACKGROUND/RATIONALE: Chronic lymphocytic leukemia (CLL) and Small Lymphocytic Lymphoma (SLL) are indolent hematologic malignancies that account for one-quarter of all lymphomas primarily affecting older patients. Survival has improved due to the development of novel oral drugs with 85.1% 5-year survival in 2019. Ibrutinib is an oral Bruton’s tyrosine kinase inhibitor that interferes with malignant B-cell proliferation and survival. The National Comprehensive Cancer Network recommends ibrutinib as a category one treatment recommendation in all settings of CLL including relapsed/refractory disease and adverse cytogenetics. This study aims to improve clinical knowledge of ibrutinib’s efficacy and safety in a Veteran population.
OBJECTIVES: The primary objective was to determine the efficacy of ibrutinib in the Veteran population as defined by progression-free survival. Secondary objectives included overall survival, overall response, duration of therapy, and prevalence of adverse drug reactions.
METHODS: This was a single center, retrospective study conducted at the Southern Arizona VA Health Care System. A retrospective chart review of patients age 18-89 with CLL or SLL treated with ibrutinib between November 1st, 2013 to August 1st, 2019 was conducted. The Kaplan-Meier method was used to estimate overall survival and progression-free survival. Descriptive statistics was used for all other endpoints. RESULTS: Twenty-three patients were included in this study. Progression free survival and overall survival at 63 months (5.25 years) was 68.2% and 72.7%, respectively. The average duration of therapy was 20.3 months with 65.2% achieving partial response, 17.3% with stable disease, and 17.3% with progression of disease. The most common adverse events were gastrointestinal (21.7%) and cardiac (17.4%) including 3 patients who developed atrial fibrillation; 34.7% of patients required a dose reduction due to toxicity.
CONCLUSION: Use of ibrutinib in the Veteran population had similar progression-free survival as the clinical trials that led to its approval; however, slightly lower overall survival was noted compared to the clinical trials. The rate of atrial fibrillation was higher in the Veteran population compared to clinical trials, whereas the prevalence of gastrointestinal, dermatologic, neurologic, and musculoskeletal adverse events was consistent with published data.
BACKGROUND/RATIONALE: Chronic lymphocytic leukemia (CLL) and Small Lymphocytic Lymphoma (SLL) are indolent hematologic malignancies that account for one-quarter of all lymphomas primarily affecting older patients. Survival has improved due to the development of novel oral drugs with 85.1% 5-year survival in 2019. Ibrutinib is an oral Bruton’s tyrosine kinase inhibitor that interferes with malignant B-cell proliferation and survival. The National Comprehensive Cancer Network recommends ibrutinib as a category one treatment recommendation in all settings of CLL including relapsed/refractory disease and adverse cytogenetics. This study aims to improve clinical knowledge of ibrutinib’s efficacy and safety in a Veteran population.
OBJECTIVES: The primary objective was to determine the efficacy of ibrutinib in the Veteran population as defined by progression-free survival. Secondary objectives included overall survival, overall response, duration of therapy, and prevalence of adverse drug reactions.
METHODS: This was a single center, retrospective study conducted at the Southern Arizona VA Health Care System. A retrospective chart review of patients age 18-89 with CLL or SLL treated with ibrutinib between November 1st, 2013 to August 1st, 2019 was conducted. The Kaplan-Meier method was used to estimate overall survival and progression-free survival. Descriptive statistics was used for all other endpoints. RESULTS: Twenty-three patients were included in this study. Progression free survival and overall survival at 63 months (5.25 years) was 68.2% and 72.7%, respectively. The average duration of therapy was 20.3 months with 65.2% achieving partial response, 17.3% with stable disease, and 17.3% with progression of disease. The most common adverse events were gastrointestinal (21.7%) and cardiac (17.4%) including 3 patients who developed atrial fibrillation; 34.7% of patients required a dose reduction due to toxicity.
CONCLUSION: Use of ibrutinib in the Veteran population had similar progression-free survival as the clinical trials that led to its approval; however, slightly lower overall survival was noted compared to the clinical trials. The rate of atrial fibrillation was higher in the Veteran population compared to clinical trials, whereas the prevalence of gastrointestinal, dermatologic, neurologic, and musculoskeletal adverse events was consistent with published data.
VTE, sepsis risk increased among COVID-19 patients with cancer
, according to data from a registry study.
Researchers analyzed data on 5,556 patients with COVID-19 who had an inpatient or emergency encounter at Mount Sinai Health System (MSHS) in New York between March 1 and May 27, 2020. Patients were included in an anonymous MSHS COVID-19 registry.
There were 421 patients who had cancer: 96 with a hematologic malignancy and 325 with solid tumors.
After adjustment for age, gender, and number of comorbidities, the odds ratios for acute VTE and sepsis for patients with cancer (versus those without cancer) were 1.77 and 1.34, respectively. The adjusted odds ratio for mortality in cancer patients was 1.02.
The results remained “relatively consistent” after stratification by solid and nonsolid cancer types, with no significant difference in outcomes between those two groups, and results remained consistent in a propensity-matched model, according to Naomi Alpert, a biostatistician at Icahn School of Medicine at Mount Sinai, New York.
Ms. Alpert reported these findings at the AACR virtual meeting: COVID-19 and Cancer.
She noted that the cancer patients were older than the noncancer patients (mean age, 69.2 years vs. 63.8 years), and cancer patients were more likely to have two or more comorbid conditions (48.2% vs. 30.4%). Cancer patients also had significantly lower hemoglobin levels and red blood cell, platelet, and white blood cell counts (P < .01 for all).
“Low white blood cell count may be one of the reasons for higher risk of sepsis in cancer patients, as it may lead to a higher risk of infection,” Ms. Alpert said. “However, it’s not clear what role cancer therapies play in the risks of COVID-19 morbidity and mortality, so there is still quite a bit to learn.”
In fact, the findings are limited by a lack of information about cancer treatment, as the registry was not designed for that purpose, she noted.
Another study limitation is the short follow-up of a month or less in most patients, due, in part, to the novelty of COVID-19, but also to the lack of information on patients after they left the hospital.
“However, we had a very large sample size, with more than 400 cancer patients included, and, to our knowledge, this is the largest analysis of its kind to be done so far,” Ms. Alpert said. “In the future, it’s going to be very important to assess the effect of cancer therapies on COVID-19 complications and to see if prior therapies had any effect on outcomes.”
Longer follow-up would also be helpful for assessing the chronic effects of COVID-19 on cancer patients over time, she said. “It would be important to see whether some of these elevated risks of venous thromboembolism and sepsis are associated with longer-term mortality risks than what we were able to measure here,” she added.
Asked about the discrepancy between mortality in this study and those of larger registries, such as the COVID-19 and Cancer Consortium (CCC19) and TERAVOLT, Ms. Alpert noted that the current study included only patients who required hospitalization or emergency care.
“Our mortality rate was actually a bit higher than what was reported in some of the other studies,” she said. “We had about a 30% mortality rate in the cancer patients and about 25% for the noncancer patients, so ... we’re sort of looking at a subset of patients who we know are the sickest of the sick, which may explain some of the higher mortality that we’re seeing.”
Ms. Alpert reported having no disclosures.
SOURCE: Alpert N et al. AACR COVID-19 and Cancer, Abstract S12-02.
, according to data from a registry study.
Researchers analyzed data on 5,556 patients with COVID-19 who had an inpatient or emergency encounter at Mount Sinai Health System (MSHS) in New York between March 1 and May 27, 2020. Patients were included in an anonymous MSHS COVID-19 registry.
There were 421 patients who had cancer: 96 with a hematologic malignancy and 325 with solid tumors.
After adjustment for age, gender, and number of comorbidities, the odds ratios for acute VTE and sepsis for patients with cancer (versus those without cancer) were 1.77 and 1.34, respectively. The adjusted odds ratio for mortality in cancer patients was 1.02.
The results remained “relatively consistent” after stratification by solid and nonsolid cancer types, with no significant difference in outcomes between those two groups, and results remained consistent in a propensity-matched model, according to Naomi Alpert, a biostatistician at Icahn School of Medicine at Mount Sinai, New York.
Ms. Alpert reported these findings at the AACR virtual meeting: COVID-19 and Cancer.
She noted that the cancer patients were older than the noncancer patients (mean age, 69.2 years vs. 63.8 years), and cancer patients were more likely to have two or more comorbid conditions (48.2% vs. 30.4%). Cancer patients also had significantly lower hemoglobin levels and red blood cell, platelet, and white blood cell counts (P < .01 for all).
“Low white blood cell count may be one of the reasons for higher risk of sepsis in cancer patients, as it may lead to a higher risk of infection,” Ms. Alpert said. “However, it’s not clear what role cancer therapies play in the risks of COVID-19 morbidity and mortality, so there is still quite a bit to learn.”
In fact, the findings are limited by a lack of information about cancer treatment, as the registry was not designed for that purpose, she noted.
Another study limitation is the short follow-up of a month or less in most patients, due, in part, to the novelty of COVID-19, but also to the lack of information on patients after they left the hospital.
“However, we had a very large sample size, with more than 400 cancer patients included, and, to our knowledge, this is the largest analysis of its kind to be done so far,” Ms. Alpert said. “In the future, it’s going to be very important to assess the effect of cancer therapies on COVID-19 complications and to see if prior therapies had any effect on outcomes.”
Longer follow-up would also be helpful for assessing the chronic effects of COVID-19 on cancer patients over time, she said. “It would be important to see whether some of these elevated risks of venous thromboembolism and sepsis are associated with longer-term mortality risks than what we were able to measure here,” she added.
Asked about the discrepancy between mortality in this study and those of larger registries, such as the COVID-19 and Cancer Consortium (CCC19) and TERAVOLT, Ms. Alpert noted that the current study included only patients who required hospitalization or emergency care.
“Our mortality rate was actually a bit higher than what was reported in some of the other studies,” she said. “We had about a 30% mortality rate in the cancer patients and about 25% for the noncancer patients, so ... we’re sort of looking at a subset of patients who we know are the sickest of the sick, which may explain some of the higher mortality that we’re seeing.”
Ms. Alpert reported having no disclosures.
SOURCE: Alpert N et al. AACR COVID-19 and Cancer, Abstract S12-02.
, according to data from a registry study.
Researchers analyzed data on 5,556 patients with COVID-19 who had an inpatient or emergency encounter at Mount Sinai Health System (MSHS) in New York between March 1 and May 27, 2020. Patients were included in an anonymous MSHS COVID-19 registry.
There were 421 patients who had cancer: 96 with a hematologic malignancy and 325 with solid tumors.
After adjustment for age, gender, and number of comorbidities, the odds ratios for acute VTE and sepsis for patients with cancer (versus those without cancer) were 1.77 and 1.34, respectively. The adjusted odds ratio for mortality in cancer patients was 1.02.
The results remained “relatively consistent” after stratification by solid and nonsolid cancer types, with no significant difference in outcomes between those two groups, and results remained consistent in a propensity-matched model, according to Naomi Alpert, a biostatistician at Icahn School of Medicine at Mount Sinai, New York.
Ms. Alpert reported these findings at the AACR virtual meeting: COVID-19 and Cancer.
She noted that the cancer patients were older than the noncancer patients (mean age, 69.2 years vs. 63.8 years), and cancer patients were more likely to have two or more comorbid conditions (48.2% vs. 30.4%). Cancer patients also had significantly lower hemoglobin levels and red blood cell, platelet, and white blood cell counts (P < .01 for all).
“Low white blood cell count may be one of the reasons for higher risk of sepsis in cancer patients, as it may lead to a higher risk of infection,” Ms. Alpert said. “However, it’s not clear what role cancer therapies play in the risks of COVID-19 morbidity and mortality, so there is still quite a bit to learn.”
In fact, the findings are limited by a lack of information about cancer treatment, as the registry was not designed for that purpose, she noted.
Another study limitation is the short follow-up of a month or less in most patients, due, in part, to the novelty of COVID-19, but also to the lack of information on patients after they left the hospital.
“However, we had a very large sample size, with more than 400 cancer patients included, and, to our knowledge, this is the largest analysis of its kind to be done so far,” Ms. Alpert said. “In the future, it’s going to be very important to assess the effect of cancer therapies on COVID-19 complications and to see if prior therapies had any effect on outcomes.”
Longer follow-up would also be helpful for assessing the chronic effects of COVID-19 on cancer patients over time, she said. “It would be important to see whether some of these elevated risks of venous thromboembolism and sepsis are associated with longer-term mortality risks than what we were able to measure here,” she added.
Asked about the discrepancy between mortality in this study and those of larger registries, such as the COVID-19 and Cancer Consortium (CCC19) and TERAVOLT, Ms. Alpert noted that the current study included only patients who required hospitalization or emergency care.
“Our mortality rate was actually a bit higher than what was reported in some of the other studies,” she said. “We had about a 30% mortality rate in the cancer patients and about 25% for the noncancer patients, so ... we’re sort of looking at a subset of patients who we know are the sickest of the sick, which may explain some of the higher mortality that we’re seeing.”
Ms. Alpert reported having no disclosures.
SOURCE: Alpert N et al. AACR COVID-19 and Cancer, Abstract S12-02.
FROM AACR: COVID-19 AND CANCER
Aspirin may accelerate cancer progression in older adults
Aspirin may accelerate the progression of advanced cancers and lead to an earlier death as a result, new data from the ASPREE study suggest.
The results showed that patients 65 years and older who started taking daily low-dose aspirin had a 19% higher chance of being diagnosed with metastatic cancer, a 22% higher chance of being diagnosed with a stage 4 tumor, and a 31% increased risk of death from stage 4 cancer, when compared with patients who took a placebo.
John J. McNeil, MBBS, PhD, of Monash University in Melbourne, Australia, and colleagues detailed these findings in the Journal of the National Cancer Institute.
“If confirmed, the clinical implications of these findings could be important for the use of aspirin in an older population,” the authors wrote.
When results of the ASPREE study were first reported in 2018, they “raised important concerns,” Ernest Hawk, MD, and Karen Colbert Maresso wrote in an editorial related to the current publication.
“Unlike ARRIVE, ASCEND, and nearly all prior primary prevention CVD [cardiovascular disease] trials of aspirin, ASPREE surprisingly demonstrated increased all-cause mortality in the aspirin group, which appeared to be driven largely by an increase in cancer-related deaths,” wrote the editorialists, who are both from the University of Texas MD Anderson Cancer Center in Houston.
Even though the ASPREE investigators have now taken a deeper dive into their data, the findings “neither explain nor alleviate the concerns raised by the initial ASPREE report,” the editorialists noted.
ASPREE design and results
ASPREE is a multicenter, double-blind trial of 19,114 older adults living in Australia (n = 16,703) or the United States (n = 2,411). Most patients were 70 years or older at baseline. However, the U.S. group also included patients 65 years and older who were racial/ethnic minorities (n = 564).
Patients were randomized to receive 100 mg of enteric-coated aspirin daily (n = 9,525) or matching placebo (n = 9,589) from March 2010 through December 2014.
At inclusion, all participants were free from cardiovascular disease, dementia, or physical disability. A previous history of cancer was not used to exclude participants, and 19.1% of patients had cancer at randomization. Most patients (89%) had not used aspirin regularly before entering the trial.
At a median follow-up of 4.7 years, there were 981 incident cancer events in the aspirin-treated group and 952 in the placebo-treated group, with an overall incident cancer rate of 10.1%.
Of the 1,933 patients with newly diagnosed cancer, 65.7% had a localized cancer, 18.8% had a new metastatic cancer, 5.8% had metastatic disease from an existing cancer, and 9.7% had a new hematologic or lymphatic cancer.
A quarter of cancer patients (n = 495) died as a result of their malignancy, with 52 dying from a cancer they already had at randomization.
Aspirin was not associated with the risk of first incident cancer diagnosis or incident localized cancer diagnosis. The hazard ratios were 1.04 for all incident cancers (95% confidence interval, 0.95-1.14) and 0.99 for incident localized cancers (95% CI, 0.89-1.11).
However, aspirin was associated with an increased risk of metastatic cancer and cancer presenting at stage 4. The HR for metastatic cancer was 1.19 (95% CI, 1.00-1.43), and the HR for newly diagnosed stage 4 cancer was 1.22 (95% CI, 1.02-1.45).
Furthermore, “an increased progression to death was observed amongst those randomized to aspirin, regardless of whether the initial cancer presentation had been localized or metastatic,” the investigators wrote.
The HRs for death were 1.35 for all cancers (95% CI, 1.13-1.61), 1.47 for localized cancers (95% CI, 1.07-2.02), and 1.30 for metastatic cancers (95% CI, 1.03-1.63).
“Deaths were particularly high among those on aspirin who were diagnosed with advanced solid cancers,” study author Andrew Chan, MD, of Massachusetts General Hospital in Boston, said in a press statement.
Indeed, HRs for death in patients with solid tumors presenting at stage 3 and 4 were a respective 2.11 (95% CI, 1.03-4.33) and 1.31 (95% CI, 1.04-1.64). This suggests a possible adverse effect of aspirin on the growth of cancers once they have already developed in older adults, Dr. Chan said.
Where does that leave aspirin for cancer prevention?
“Although these results suggest that we should be cautious about starting aspirin therapy in otherwise healthy older adults, this does not mean that individuals who are already taking aspirin – particularly if they began taking it at a younger age – should stop their aspirin regimen,” Dr. Chan said.
There are decades of data supporting the use of daily aspirin to prevent multiple cancer types, particularly colorectal cancer, in individuals under the age of 70 years. In a recent meta-analysis, for example, regular aspirin use was linked to a 27% reduced risk for colorectal cancer, a 33% reduced risk for squamous cell esophageal cancer, a 39% decreased risk for adenocarcinoma of the esophagus and gastric cardia, a 36% decreased risk for stomach cancer, a 38% decreased risk for hepatobiliary tract cancer, and a 22% decreased risk for pancreatic cancer.
While these figures are mostly based on observational and case-control studies, it “reaffirms the fact that, overall, when you look at all of the ages, that there is still a benefit of aspirin for cancer,” John Cuzick, PhD, of Queen Mary University of London (England), said in an interview.
In fact, the meta-analysis goes as far as suggesting that perhaps the dose of aspirin being used is too low, with the authors noting that there was a 35% risk reduction in colorectal cancer with a dose of 325 mg daily. That’s a new finding, Dr. Cuzick said.
He noted that the ASPREE study largely consists of patients 70 years of age or older, and the authors “draw some conclusions which we can’t ignore about potential safety.”
One of the safety concerns is the increased risk for gastrointestinal bleeding, which is why Dr. Cuzick and colleagues previously recommended caution in the use of aspirin to prevent cancer in elderly patients. The group published a study in 2015 that suggested a benefit of taking aspirin daily for 5-10 years in patients aged 50-65 years, but the risk/benefit ratio was unclear for patients 70 years and older.
The ASPREE data now add to those uncertainties and suggest “there may be some side effects that we do not understand,” Dr. Cuzick said.
“I’m still optimistic that aspirin is going to be important for cancer prevention, but probably focusing on ages 50-70,” he added. “[The ASPREE data] reinforce the caution that we have to take in terms of trying to understand what the side effects are and what’s going on at these older ages.”
Dr. Cuzick is currently leading the AsCaP Project, an international effort to better understand why aspirin might work in preventing some cancer types but not others. AsCaP is supported by Cancer Research UK and also includes Dr. Chan among the researchers attempting to find out which patients may benefit the most from aspirin and which may be at greater risk of adverse effects.
The ASPREE trial was funded by grants from the National Institute on Aging, the National Cancer Institute, the National Health and Medical Research Council of Australia, Monash University, and the Victorian Cancer Agency. Several ASPREE investigators disclosed financial relationships with Bayer Pharma. The editorialists had no conflicts of interest. Dr. Cuzick has been an advisory board member for Bayer in the past.
SOURCE: McNeil J et al. J Natl Cancer Inst. 2020 Aug 11. doi: 10.1093/jnci/djaa114.
Aspirin may accelerate the progression of advanced cancers and lead to an earlier death as a result, new data from the ASPREE study suggest.
The results showed that patients 65 years and older who started taking daily low-dose aspirin had a 19% higher chance of being diagnosed with metastatic cancer, a 22% higher chance of being diagnosed with a stage 4 tumor, and a 31% increased risk of death from stage 4 cancer, when compared with patients who took a placebo.
John J. McNeil, MBBS, PhD, of Monash University in Melbourne, Australia, and colleagues detailed these findings in the Journal of the National Cancer Institute.
“If confirmed, the clinical implications of these findings could be important for the use of aspirin in an older population,” the authors wrote.
When results of the ASPREE study were first reported in 2018, they “raised important concerns,” Ernest Hawk, MD, and Karen Colbert Maresso wrote in an editorial related to the current publication.
“Unlike ARRIVE, ASCEND, and nearly all prior primary prevention CVD [cardiovascular disease] trials of aspirin, ASPREE surprisingly demonstrated increased all-cause mortality in the aspirin group, which appeared to be driven largely by an increase in cancer-related deaths,” wrote the editorialists, who are both from the University of Texas MD Anderson Cancer Center in Houston.
Even though the ASPREE investigators have now taken a deeper dive into their data, the findings “neither explain nor alleviate the concerns raised by the initial ASPREE report,” the editorialists noted.
ASPREE design and results
ASPREE is a multicenter, double-blind trial of 19,114 older adults living in Australia (n = 16,703) or the United States (n = 2,411). Most patients were 70 years or older at baseline. However, the U.S. group also included patients 65 years and older who were racial/ethnic minorities (n = 564).
Patients were randomized to receive 100 mg of enteric-coated aspirin daily (n = 9,525) or matching placebo (n = 9,589) from March 2010 through December 2014.
At inclusion, all participants were free from cardiovascular disease, dementia, or physical disability. A previous history of cancer was not used to exclude participants, and 19.1% of patients had cancer at randomization. Most patients (89%) had not used aspirin regularly before entering the trial.
At a median follow-up of 4.7 years, there were 981 incident cancer events in the aspirin-treated group and 952 in the placebo-treated group, with an overall incident cancer rate of 10.1%.
Of the 1,933 patients with newly diagnosed cancer, 65.7% had a localized cancer, 18.8% had a new metastatic cancer, 5.8% had metastatic disease from an existing cancer, and 9.7% had a new hematologic or lymphatic cancer.
A quarter of cancer patients (n = 495) died as a result of their malignancy, with 52 dying from a cancer they already had at randomization.
Aspirin was not associated with the risk of first incident cancer diagnosis or incident localized cancer diagnosis. The hazard ratios were 1.04 for all incident cancers (95% confidence interval, 0.95-1.14) and 0.99 for incident localized cancers (95% CI, 0.89-1.11).
However, aspirin was associated with an increased risk of metastatic cancer and cancer presenting at stage 4. The HR for metastatic cancer was 1.19 (95% CI, 1.00-1.43), and the HR for newly diagnosed stage 4 cancer was 1.22 (95% CI, 1.02-1.45).
Furthermore, “an increased progression to death was observed amongst those randomized to aspirin, regardless of whether the initial cancer presentation had been localized or metastatic,” the investigators wrote.
The HRs for death were 1.35 for all cancers (95% CI, 1.13-1.61), 1.47 for localized cancers (95% CI, 1.07-2.02), and 1.30 for metastatic cancers (95% CI, 1.03-1.63).
“Deaths were particularly high among those on aspirin who were diagnosed with advanced solid cancers,” study author Andrew Chan, MD, of Massachusetts General Hospital in Boston, said in a press statement.
Indeed, HRs for death in patients with solid tumors presenting at stage 3 and 4 were a respective 2.11 (95% CI, 1.03-4.33) and 1.31 (95% CI, 1.04-1.64). This suggests a possible adverse effect of aspirin on the growth of cancers once they have already developed in older adults, Dr. Chan said.
Where does that leave aspirin for cancer prevention?
“Although these results suggest that we should be cautious about starting aspirin therapy in otherwise healthy older adults, this does not mean that individuals who are already taking aspirin – particularly if they began taking it at a younger age – should stop their aspirin regimen,” Dr. Chan said.
There are decades of data supporting the use of daily aspirin to prevent multiple cancer types, particularly colorectal cancer, in individuals under the age of 70 years. In a recent meta-analysis, for example, regular aspirin use was linked to a 27% reduced risk for colorectal cancer, a 33% reduced risk for squamous cell esophageal cancer, a 39% decreased risk for adenocarcinoma of the esophagus and gastric cardia, a 36% decreased risk for stomach cancer, a 38% decreased risk for hepatobiliary tract cancer, and a 22% decreased risk for pancreatic cancer.
While these figures are mostly based on observational and case-control studies, it “reaffirms the fact that, overall, when you look at all of the ages, that there is still a benefit of aspirin for cancer,” John Cuzick, PhD, of Queen Mary University of London (England), said in an interview.
In fact, the meta-analysis goes as far as suggesting that perhaps the dose of aspirin being used is too low, with the authors noting that there was a 35% risk reduction in colorectal cancer with a dose of 325 mg daily. That’s a new finding, Dr. Cuzick said.
He noted that the ASPREE study largely consists of patients 70 years of age or older, and the authors “draw some conclusions which we can’t ignore about potential safety.”
One of the safety concerns is the increased risk for gastrointestinal bleeding, which is why Dr. Cuzick and colleagues previously recommended caution in the use of aspirin to prevent cancer in elderly patients. The group published a study in 2015 that suggested a benefit of taking aspirin daily for 5-10 years in patients aged 50-65 years, but the risk/benefit ratio was unclear for patients 70 years and older.
The ASPREE data now add to those uncertainties and suggest “there may be some side effects that we do not understand,” Dr. Cuzick said.
“I’m still optimistic that aspirin is going to be important for cancer prevention, but probably focusing on ages 50-70,” he added. “[The ASPREE data] reinforce the caution that we have to take in terms of trying to understand what the side effects are and what’s going on at these older ages.”
Dr. Cuzick is currently leading the AsCaP Project, an international effort to better understand why aspirin might work in preventing some cancer types but not others. AsCaP is supported by Cancer Research UK and also includes Dr. Chan among the researchers attempting to find out which patients may benefit the most from aspirin and which may be at greater risk of adverse effects.
The ASPREE trial was funded by grants from the National Institute on Aging, the National Cancer Institute, the National Health and Medical Research Council of Australia, Monash University, and the Victorian Cancer Agency. Several ASPREE investigators disclosed financial relationships with Bayer Pharma. The editorialists had no conflicts of interest. Dr. Cuzick has been an advisory board member for Bayer in the past.
SOURCE: McNeil J et al. J Natl Cancer Inst. 2020 Aug 11. doi: 10.1093/jnci/djaa114.
Aspirin may accelerate the progression of advanced cancers and lead to an earlier death as a result, new data from the ASPREE study suggest.
The results showed that patients 65 years and older who started taking daily low-dose aspirin had a 19% higher chance of being diagnosed with metastatic cancer, a 22% higher chance of being diagnosed with a stage 4 tumor, and a 31% increased risk of death from stage 4 cancer, when compared with patients who took a placebo.
John J. McNeil, MBBS, PhD, of Monash University in Melbourne, Australia, and colleagues detailed these findings in the Journal of the National Cancer Institute.
“If confirmed, the clinical implications of these findings could be important for the use of aspirin in an older population,” the authors wrote.
When results of the ASPREE study were first reported in 2018, they “raised important concerns,” Ernest Hawk, MD, and Karen Colbert Maresso wrote in an editorial related to the current publication.
“Unlike ARRIVE, ASCEND, and nearly all prior primary prevention CVD [cardiovascular disease] trials of aspirin, ASPREE surprisingly demonstrated increased all-cause mortality in the aspirin group, which appeared to be driven largely by an increase in cancer-related deaths,” wrote the editorialists, who are both from the University of Texas MD Anderson Cancer Center in Houston.
Even though the ASPREE investigators have now taken a deeper dive into their data, the findings “neither explain nor alleviate the concerns raised by the initial ASPREE report,” the editorialists noted.
ASPREE design and results
ASPREE is a multicenter, double-blind trial of 19,114 older adults living in Australia (n = 16,703) or the United States (n = 2,411). Most patients were 70 years or older at baseline. However, the U.S. group also included patients 65 years and older who were racial/ethnic minorities (n = 564).
Patients were randomized to receive 100 mg of enteric-coated aspirin daily (n = 9,525) or matching placebo (n = 9,589) from March 2010 through December 2014.
At inclusion, all participants were free from cardiovascular disease, dementia, or physical disability. A previous history of cancer was not used to exclude participants, and 19.1% of patients had cancer at randomization. Most patients (89%) had not used aspirin regularly before entering the trial.
At a median follow-up of 4.7 years, there were 981 incident cancer events in the aspirin-treated group and 952 in the placebo-treated group, with an overall incident cancer rate of 10.1%.
Of the 1,933 patients with newly diagnosed cancer, 65.7% had a localized cancer, 18.8% had a new metastatic cancer, 5.8% had metastatic disease from an existing cancer, and 9.7% had a new hematologic or lymphatic cancer.
A quarter of cancer patients (n = 495) died as a result of their malignancy, with 52 dying from a cancer they already had at randomization.
Aspirin was not associated with the risk of first incident cancer diagnosis or incident localized cancer diagnosis. The hazard ratios were 1.04 for all incident cancers (95% confidence interval, 0.95-1.14) and 0.99 for incident localized cancers (95% CI, 0.89-1.11).
However, aspirin was associated with an increased risk of metastatic cancer and cancer presenting at stage 4. The HR for metastatic cancer was 1.19 (95% CI, 1.00-1.43), and the HR for newly diagnosed stage 4 cancer was 1.22 (95% CI, 1.02-1.45).
Furthermore, “an increased progression to death was observed amongst those randomized to aspirin, regardless of whether the initial cancer presentation had been localized or metastatic,” the investigators wrote.
The HRs for death were 1.35 for all cancers (95% CI, 1.13-1.61), 1.47 for localized cancers (95% CI, 1.07-2.02), and 1.30 for metastatic cancers (95% CI, 1.03-1.63).
“Deaths were particularly high among those on aspirin who were diagnosed with advanced solid cancers,” study author Andrew Chan, MD, of Massachusetts General Hospital in Boston, said in a press statement.
Indeed, HRs for death in patients with solid tumors presenting at stage 3 and 4 were a respective 2.11 (95% CI, 1.03-4.33) and 1.31 (95% CI, 1.04-1.64). This suggests a possible adverse effect of aspirin on the growth of cancers once they have already developed in older adults, Dr. Chan said.
Where does that leave aspirin for cancer prevention?
“Although these results suggest that we should be cautious about starting aspirin therapy in otherwise healthy older adults, this does not mean that individuals who are already taking aspirin – particularly if they began taking it at a younger age – should stop their aspirin regimen,” Dr. Chan said.
There are decades of data supporting the use of daily aspirin to prevent multiple cancer types, particularly colorectal cancer, in individuals under the age of 70 years. In a recent meta-analysis, for example, regular aspirin use was linked to a 27% reduced risk for colorectal cancer, a 33% reduced risk for squamous cell esophageal cancer, a 39% decreased risk for adenocarcinoma of the esophagus and gastric cardia, a 36% decreased risk for stomach cancer, a 38% decreased risk for hepatobiliary tract cancer, and a 22% decreased risk for pancreatic cancer.
While these figures are mostly based on observational and case-control studies, it “reaffirms the fact that, overall, when you look at all of the ages, that there is still a benefit of aspirin for cancer,” John Cuzick, PhD, of Queen Mary University of London (England), said in an interview.
In fact, the meta-analysis goes as far as suggesting that perhaps the dose of aspirin being used is too low, with the authors noting that there was a 35% risk reduction in colorectal cancer with a dose of 325 mg daily. That’s a new finding, Dr. Cuzick said.
He noted that the ASPREE study largely consists of patients 70 years of age or older, and the authors “draw some conclusions which we can’t ignore about potential safety.”
One of the safety concerns is the increased risk for gastrointestinal bleeding, which is why Dr. Cuzick and colleagues previously recommended caution in the use of aspirin to prevent cancer in elderly patients. The group published a study in 2015 that suggested a benefit of taking aspirin daily for 5-10 years in patients aged 50-65 years, but the risk/benefit ratio was unclear for patients 70 years and older.
The ASPREE data now add to those uncertainties and suggest “there may be some side effects that we do not understand,” Dr. Cuzick said.
“I’m still optimistic that aspirin is going to be important for cancer prevention, but probably focusing on ages 50-70,” he added. “[The ASPREE data] reinforce the caution that we have to take in terms of trying to understand what the side effects are and what’s going on at these older ages.”
Dr. Cuzick is currently leading the AsCaP Project, an international effort to better understand why aspirin might work in preventing some cancer types but not others. AsCaP is supported by Cancer Research UK and also includes Dr. Chan among the researchers attempting to find out which patients may benefit the most from aspirin and which may be at greater risk of adverse effects.
The ASPREE trial was funded by grants from the National Institute on Aging, the National Cancer Institute, the National Health and Medical Research Council of Australia, Monash University, and the Victorian Cancer Agency. Several ASPREE investigators disclosed financial relationships with Bayer Pharma. The editorialists had no conflicts of interest. Dr. Cuzick has been an advisory board member for Bayer in the past.
SOURCE: McNeil J et al. J Natl Cancer Inst. 2020 Aug 11. doi: 10.1093/jnci/djaa114.
FROM JOURNAL OF THE NATIONAL CANCER INSTITUTE
Antihistamines synergistically induce CLL cell death with TK inhibitors
Three over-the-counter antihistamines, clemastine, desloratadine, and loratadine, preferentially induce cell death through lysosomal membrane permeabilization in chronic lymphocytic leukemia cells, compared with normal lymphocytes, according to the results of an in vitro study published in Leukemia Research.
In addition, the antihistamines showed a synergistic effect in killing off chronic lymphocytic leukemia (CLL) cells when combined with the tyrosine kinase inhibitor, ibrutinib, but not with chemotherapy, according to Aaron Chanas-Larue of CancerCare Manitoba, Winnipeg, Man., and colleagues.
Blood from CLL patients and age-matched healthy donors was collected, treated, and compared with two malignant B-cell lines. Cells were treated with the three different antihistamines at various concentrations alone and in the presence of ibrutinib. Cell death was determined by flow cytometry using fluorescent staining and EC50 (half-maximal effective concentration) values were calculated.
Of the three drugs, clemastine demonstrated the greatest degree of cytotoxicity, with a mean EC50 value of 12.3 mcmol in CLL cells. Desloratadine and loratadine also had a greater effect on leukemic cells, with mean EC50 values of 27.2 mcmol and 17.2 mcmol, respectively, according to the researchers.
Clemastine also showed the greatest tumor sensitivity, with an EC50 nearly three times lower for CLL cells (EC50, 12.3 mcmol) than for normal peripheral blood mononuclear cells (EC50, 32 mcmol). In addition, clemastine induced cell death over a 72-hour time course in CLL cells, and was equally effective against CLL cells with del17p, unmutated immunoglobulin heavy chain gene, or high Zeta-chain–associated protein kinase 70 expression.
Effective synergy
The researchers found that clemastine enhanced cell death when combined with targeted CLL therapies ibrutinib, idelalisib, or venetoclax, but did not enhance the activities of the chemotherapeutics fludarabine, chlorambucil, or bendamustine.
Ibrutinib increased cell death to the greatest degree when combined with antihistamines. The effect was demonstrated to be synergistic, showing “a unique interaction between the activities of the antihistamines and this inhibitor of the B-cell pathway, suggesting a clinical potential for this combination,” the authors stated.
“Repurposing well-characterized drugs such as antihistamines with defined mechanisms and toxicities allows for repositioning of these drugs to use in CLL treatment in the near future in the context of targeted therapies,” they concluded.
The study was supported by grants from the Cancer Research Society and the CancerCare Manitoba Foundation. The authors reported that they had no conflicts.
SOURCE: Chanas-Larue A et al. Leuk Res. 2020 Jul 17. doi: 10.1016/j.leukres.2020.106423.
Three over-the-counter antihistamines, clemastine, desloratadine, and loratadine, preferentially induce cell death through lysosomal membrane permeabilization in chronic lymphocytic leukemia cells, compared with normal lymphocytes, according to the results of an in vitro study published in Leukemia Research.
In addition, the antihistamines showed a synergistic effect in killing off chronic lymphocytic leukemia (CLL) cells when combined with the tyrosine kinase inhibitor, ibrutinib, but not with chemotherapy, according to Aaron Chanas-Larue of CancerCare Manitoba, Winnipeg, Man., and colleagues.
Blood from CLL patients and age-matched healthy donors was collected, treated, and compared with two malignant B-cell lines. Cells were treated with the three different antihistamines at various concentrations alone and in the presence of ibrutinib. Cell death was determined by flow cytometry using fluorescent staining and EC50 (half-maximal effective concentration) values were calculated.
Of the three drugs, clemastine demonstrated the greatest degree of cytotoxicity, with a mean EC50 value of 12.3 mcmol in CLL cells. Desloratadine and loratadine also had a greater effect on leukemic cells, with mean EC50 values of 27.2 mcmol and 17.2 mcmol, respectively, according to the researchers.
Clemastine also showed the greatest tumor sensitivity, with an EC50 nearly three times lower for CLL cells (EC50, 12.3 mcmol) than for normal peripheral blood mononuclear cells (EC50, 32 mcmol). In addition, clemastine induced cell death over a 72-hour time course in CLL cells, and was equally effective against CLL cells with del17p, unmutated immunoglobulin heavy chain gene, or high Zeta-chain–associated protein kinase 70 expression.
Effective synergy
The researchers found that clemastine enhanced cell death when combined with targeted CLL therapies ibrutinib, idelalisib, or venetoclax, but did not enhance the activities of the chemotherapeutics fludarabine, chlorambucil, or bendamustine.
Ibrutinib increased cell death to the greatest degree when combined with antihistamines. The effect was demonstrated to be synergistic, showing “a unique interaction between the activities of the antihistamines and this inhibitor of the B-cell pathway, suggesting a clinical potential for this combination,” the authors stated.
“Repurposing well-characterized drugs such as antihistamines with defined mechanisms and toxicities allows for repositioning of these drugs to use in CLL treatment in the near future in the context of targeted therapies,” they concluded.
The study was supported by grants from the Cancer Research Society and the CancerCare Manitoba Foundation. The authors reported that they had no conflicts.
SOURCE: Chanas-Larue A et al. Leuk Res. 2020 Jul 17. doi: 10.1016/j.leukres.2020.106423.
Three over-the-counter antihistamines, clemastine, desloratadine, and loratadine, preferentially induce cell death through lysosomal membrane permeabilization in chronic lymphocytic leukemia cells, compared with normal lymphocytes, according to the results of an in vitro study published in Leukemia Research.
In addition, the antihistamines showed a synergistic effect in killing off chronic lymphocytic leukemia (CLL) cells when combined with the tyrosine kinase inhibitor, ibrutinib, but not with chemotherapy, according to Aaron Chanas-Larue of CancerCare Manitoba, Winnipeg, Man., and colleagues.
Blood from CLL patients and age-matched healthy donors was collected, treated, and compared with two malignant B-cell lines. Cells were treated with the three different antihistamines at various concentrations alone and in the presence of ibrutinib. Cell death was determined by flow cytometry using fluorescent staining and EC50 (half-maximal effective concentration) values were calculated.
Of the three drugs, clemastine demonstrated the greatest degree of cytotoxicity, with a mean EC50 value of 12.3 mcmol in CLL cells. Desloratadine and loratadine also had a greater effect on leukemic cells, with mean EC50 values of 27.2 mcmol and 17.2 mcmol, respectively, according to the researchers.
Clemastine also showed the greatest tumor sensitivity, with an EC50 nearly three times lower for CLL cells (EC50, 12.3 mcmol) than for normal peripheral blood mononuclear cells (EC50, 32 mcmol). In addition, clemastine induced cell death over a 72-hour time course in CLL cells, and was equally effective against CLL cells with del17p, unmutated immunoglobulin heavy chain gene, or high Zeta-chain–associated protein kinase 70 expression.
Effective synergy
The researchers found that clemastine enhanced cell death when combined with targeted CLL therapies ibrutinib, idelalisib, or venetoclax, but did not enhance the activities of the chemotherapeutics fludarabine, chlorambucil, or bendamustine.
Ibrutinib increased cell death to the greatest degree when combined with antihistamines. The effect was demonstrated to be synergistic, showing “a unique interaction between the activities of the antihistamines and this inhibitor of the B-cell pathway, suggesting a clinical potential for this combination,” the authors stated.
“Repurposing well-characterized drugs such as antihistamines with defined mechanisms and toxicities allows for repositioning of these drugs to use in CLL treatment in the near future in the context of targeted therapies,” they concluded.
The study was supported by grants from the Cancer Research Society and the CancerCare Manitoba Foundation. The authors reported that they had no conflicts.
SOURCE: Chanas-Larue A et al. Leuk Res. 2020 Jul 17. doi: 10.1016/j.leukres.2020.106423.
FROM LEUKEMIA RESEARCH