Bleeding Disorders

COPENHAGEN – It’s early days yet, but results look highly promising for the ability of an experimental gene-transfer therapy to improve coagulation parameters in patients with severe hemophilia B.

In a phase I/II dose-escalation study, a single 1-hour infusion of the gene-transfer product, labeled SPK-9001, resulted in factor IX activity levels ranging from 25% to 39% of normal in four men with severe or moderately severe hemophilia B, reported Dr. Katherine A High, president and chief scientific officer of Spark Therapeutics, maker of the product.

©Kativ/iStockphoto

“One of the most remarkable features of the data in my mind has been a very consistent performance,” she said at a briefing at the annual congress of the European Hematology Association.

The product consists of a vector containing a novel bio-engineered adeno-associated virus (AAV) capsid with tropism for liver, and a factor IX cassette that carries a strong liver-specific promoter to drive the expression of the factor IX variant, dubbed factor IX Padua.

“The hypothesis of the work was that if we could engineer a vector efficient enough, we would be able to infuse it at a dose low enough that it would drive loads of expression greater than 12% of normal, which in previous work has been shown to be associated with an absence of joint bleeds in natural history studies of people with mild disease, and that infusion at a low dose would eliminate the need for any type of immune suppression with steroids,” Dr. High said.

Other attempts at genetic engineering in patients with hemophilia B have been hampered by the need to use high doses of vector that can induce an immune response, thereby negating the benefit of therapy.

In this ongoing study, conducted in Mississippi, Pennsylvania, and California, males 18 and older with a confirmed diagnosis of hemophilia B (defined as equal to or less than 2 IU/dL or 2% endogenous factor IX) who have received 50 or more days of exposure to factor IX products are enrolled. The patients must have a minimum average of four bleeding events per year requiring episodic treatment of factor IX infusions or prophylactic factor IX infusions, no measurable factor IX inhibitor as assessed by the central laboratory, and no prior history of inhibitors to factor IX protein.

In an oral session at the congress, Dr. Spencer Sullivan, assistant professor of pediatrics and medicine at the University of Mississippi Medical Center in Jackson, presented data on four men whose age ranges from 18 to 47 years.

In the dose-escalation phase of the study, the patients received single infusions of SPK-9001 at an initial starting dose of 5 x 1011 vector genomes of body weight. They were followed for 7-26 weeks after gene transfer for factor IX activity levels, liver enzymes, bleeding episode, and factor usage. As of May 22, 2016, the first four patients showed factor IX activity levels of 32%, 39%, 25%, and 27% of normal, respectively.

All subjects are currently off prophylactic factor IX infusions. During the course of follow-up, one patient infused himself with factor IX once, treating himself 2 days after vector infusion for a suspected ankle bleed.

Asked by a reporter how durable the effect was, Dr. High replied that in dog models of hemophilia B the effect of the gene transfer has been durable.

The best evidence to date of durability in humans, she said, comes from investigators at University College in London (England), who found that if patients can make it past the first 8-10 weeks without developing an immune response to the transfer product, they are likely to do well, and to have a durable effect, she said.

Dr. Anton Hagenbeek, from the Academic Medical Center, University of Amsterdam, who moderated the briefing but was not involved in the study, said that Dr. High was “to be congratulated for these best data ever seen.”

He asked, facetiously, whether she thought that “thousands of patients would buy a ticket to Philadelphia.” The “City of Brotherly Love” is home to one of the trial sites and to Spark headquarters.

The study is sponsored by Spark Therapeutics and Pfizer. Dr. High is president and chief scientific officer of Spark. Dr. Sullivan and Dr. Hagenbeek reported no relevant disclosures.

COPENHAGEN – It’s early days yet, but results look highly promising for the ability of an experimental gene-transfer therapy to improve coagulation parameters in patients with severe hemophilia B.

In a phase I/II dose-escalation study, a single 1-hour infusion of the gene-transfer product, labeled SPK-9001, resulted in factor IX activity levels ranging from 25% to 39% of normal in four men with severe or moderately severe hemophilia B, reported Dr. Katherine A High, president and chief scientific officer of Spark Therapeutics, maker of the product.

©Kativ/iStockphoto

“One of the most remarkable features of the data in my mind has been a very consistent performance,” she said at a briefing at the annual congress of the European Hematology Association.

The product consists of a vector containing a novel bio-engineered adeno-associated virus (AAV) capsid with tropism for liver, and a factor IX cassette that carries a strong liver-specific promoter to drive the expression of the factor IX variant, dubbed factor IX Padua.

“The hypothesis of the work was that if we could engineer a vector efficient enough, we would be able to infuse it at a dose low enough that it would drive loads of expression greater than 12% of normal, which in previous work has been shown to be associated with an absence of joint bleeds in natural history studies of people with mild disease, and that infusion at a low dose would eliminate the need for any type of immune suppression with steroids,” Dr. High said.

Other attempts at genetic engineering in patients with hemophilia B have been hampered by the need to use high doses of vector that can induce an immune response, thereby negating the benefit of therapy.

In this ongoing study, conducted in Mississippi, Pennsylvania, and California, males 18 and older with a confirmed diagnosis of hemophilia B (defined as equal to or less than 2 IU/dL or 2% endogenous factor IX) who have received 50 or more days of exposure to factor IX products are enrolled. The patients must have a minimum average of four bleeding events per year requiring episodic treatment of factor IX infusions or prophylactic factor IX infusions, no measurable factor IX inhibitor as assessed by the central laboratory, and no prior history of inhibitors to factor IX protein.

In an oral session at the congress, Dr. Spencer Sullivan, assistant professor of pediatrics and medicine at the University of Mississippi Medical Center in Jackson, presented data on four men whose age ranges from 18 to 47 years.

In the dose-escalation phase of the study, the patients received single infusions of SPK-9001 at an initial starting dose of 5 x 1011 vector genomes of body weight. They were followed for 7-26 weeks after gene transfer for factor IX activity levels, liver enzymes, bleeding episode, and factor usage. As of May 22, 2016, the first four patients showed factor IX activity levels of 32%, 39%, 25%, and 27% of normal, respectively.

All subjects are currently off prophylactic factor IX infusions. During the course of follow-up, one patient infused himself with factor IX once, treating himself 2 days after vector infusion for a suspected ankle bleed.

Asked by a reporter how durable the effect was, Dr. High replied that in dog models of hemophilia B the effect of the gene transfer has been durable.

The best evidence to date of durability in humans, she said, comes from investigators at University College in London (England), who found that if patients can make it past the first 8-10 weeks without developing an immune response to the transfer product, they are likely to do well, and to have a durable effect, she said.

Dr. Anton Hagenbeek, from the Academic Medical Center, University of Amsterdam, who moderated the briefing but was not involved in the study, said that Dr. High was “to be congratulated for these best data ever seen.”

He asked, facetiously, whether she thought that “thousands of patients would buy a ticket to Philadelphia.” The “City of Brotherly Love” is home to one of the trial sites and to Spark headquarters.

The study is sponsored by Spark Therapeutics and Pfizer. Dr. High is president and chief scientific officer of Spark. Dr. Sullivan and Dr. Hagenbeek reported no relevant disclosures.

COPENHAGEN – It’s early days yet, but results look highly promising for the ability of an experimental gene-transfer therapy to improve coagulation parameters in patients with severe hemophilia B.

In a phase I/II dose-escalation study, a single 1-hour infusion of the gene-transfer product, labeled SPK-9001, resulted in factor IX activity levels ranging from 25% to 39% of normal in four men with severe or moderately severe hemophilia B, reported Dr. Katherine A High, president and chief scientific officer of Spark Therapeutics, maker of the product.

©Kativ/iStockphoto

“One of the most remarkable features of the data in my mind has been a very consistent performance,” she said at a briefing at the annual congress of the European Hematology Association.

The product consists of a vector containing a novel bio-engineered adeno-associated virus (AAV) capsid with tropism for liver, and a factor IX cassette that carries a strong liver-specific promoter to drive the expression of the factor IX variant, dubbed factor IX Padua.

“The hypothesis of the work was that if we could engineer a vector efficient enough, we would be able to infuse it at a dose low enough that it would drive loads of expression greater than 12% of normal, which in previous work has been shown to be associated with an absence of joint bleeds in natural history studies of people with mild disease, and that infusion at a low dose would eliminate the need for any type of immune suppression with steroids,” Dr. High said.

Other attempts at genetic engineering in patients with hemophilia B have been hampered by the need to use high doses of vector that can induce an immune response, thereby negating the benefit of therapy.

In this ongoing study, conducted in Mississippi, Pennsylvania, and California, males 18 and older with a confirmed diagnosis of hemophilia B (defined as equal to or less than 2 IU/dL or 2% endogenous factor IX) who have received 50 or more days of exposure to factor IX products are enrolled. The patients must have a minimum average of four bleeding events per year requiring episodic treatment of factor IX infusions or prophylactic factor IX infusions, no measurable factor IX inhibitor as assessed by the central laboratory, and no prior history of inhibitors to factor IX protein.

In an oral session at the congress, Dr. Spencer Sullivan, assistant professor of pediatrics and medicine at the University of Mississippi Medical Center in Jackson, presented data on four men whose age ranges from 18 to 47 years.

In the dose-escalation phase of the study, the patients received single infusions of SPK-9001 at an initial starting dose of 5 x 1011 vector genomes of body weight. They were followed for 7-26 weeks after gene transfer for factor IX activity levels, liver enzymes, bleeding episode, and factor usage. As of May 22, 2016, the first four patients showed factor IX activity levels of 32%, 39%, 25%, and 27% of normal, respectively.

All subjects are currently off prophylactic factor IX infusions. During the course of follow-up, one patient infused himself with factor IX once, treating himself 2 days after vector infusion for a suspected ankle bleed.

Asked by a reporter how durable the effect was, Dr. High replied that in dog models of hemophilia B the effect of the gene transfer has been durable.

The best evidence to date of durability in humans, she said, comes from investigators at University College in London (England), who found that if patients can make it past the first 8-10 weeks without developing an immune response to the transfer product, they are likely to do well, and to have a durable effect, she said.

Dr. Anton Hagenbeek, from the Academic Medical Center, University of Amsterdam, who moderated the briefing but was not involved in the study, said that Dr. High was “to be congratulated for these best data ever seen.”

He asked, facetiously, whether she thought that “thousands of patients would buy a ticket to Philadelphia.” The “City of Brotherly Love” is home to one of the trial sites and to Spark headquarters.

The study is sponsored by Spark Therapeutics and Pfizer. Dr. High is president and chief scientific officer of Spark. Dr. Sullivan and Dr. Hagenbeek reported no relevant disclosures.

Copenhagen – A real-life comparison of major bleeding risk with anticoagulants showed that in-hospital mortality was lower with novel oral agents than with vitamin K antagonists, but the risk varied by bleeding site.

Novel oral anticoagulants (NOACs) such as dabigatran (Pradaxa), rivaroxaban (Xarelto), and apixaban (Eliquis) were associated in randomized phase III clinical trials with lower incidences of major bleeding than vitamin K antagonists (VKA) such as warfarin, and the newer, heavily advertised agents are widely used in clinical practice, noted Dr. Laura Franco of the Stroke Unit at the University of Perugia, Italy.

“But there is [little] information about the management and outcomes of major bleeding with NOACs in real life,” she said at a briefing at the annual congress of the European Hematology Association.

Neil Osterweil/Frontline Medical News

To rectify this situation, Dr. Franco and her colleagues at nine Italian hospitals and the NOAC registry based in Dresden, Germany, looked at 30-day mortality and other outcomes among 874 consecutive patients admitted for a major bleeding episode from September 2013 through May 2016. In all, 220 of the patients were on NOACs, and 654 were on VKAs.

Intracranial bleeds occurred in 44% of all patients, but were significantly less common among patients on NOACs than on VKAs (22% vs, 52%, respectively, odds ratio 0.26, P less than .001), whereas gastrointestinal bleeds, which occurred in 30% of all patients, were more frequent with the newer oral agents than with the older VKAs (46% vs. 30%, OR 2.69, P less than .001).

Deaths within 30 days of emergency department admission were less frequent with NOACs (10% vs. 17%, hazard ratio 0.56, P = .012).

“But when we analyzed the subpopulation of patients with different sites of bleeding, we saw that among intracranial hemorrhage, the rate was equal among NOAC and VKAs patients, 25% in both groups,” Dr. Franco said.

Deaths from gastrointestinal bleeding were numerically lower among patients on NOACs (7% vs. 10%), but this difference was not statistically significant.

“The great advantages of the new oral anticoagulants are the reduced risk in intracranial hemorrhage, so we showed that the lower mortality is not due to an intrinsic capacity to reduce deaths by NOACs as compared to VKAs, but to a different pattern of bleeding sites,” Dr. Franco said.

The study funding source was not disclosed. Dr. Franco did not report relevant disclosures.

Copenhagen – A real-life comparison of major bleeding risk with anticoagulants showed that in-hospital mortality was lower with novel oral agents than with vitamin K antagonists, but the risk varied by bleeding site.

Novel oral anticoagulants (NOACs) such as dabigatran (Pradaxa), rivaroxaban (Xarelto), and apixaban (Eliquis) were associated in randomized phase III clinical trials with lower incidences of major bleeding than vitamin K antagonists (VKA) such as warfarin, and the newer, heavily advertised agents are widely used in clinical practice, noted Dr. Laura Franco of the Stroke Unit at the University of Perugia, Italy.

“But there is [little] information about the management and outcomes of major bleeding with NOACs in real life,” she said at a briefing at the annual congress of the European Hematology Association.

Neil Osterweil/Frontline Medical News

To rectify this situation, Dr. Franco and her colleagues at nine Italian hospitals and the NOAC registry based in Dresden, Germany, looked at 30-day mortality and other outcomes among 874 consecutive patients admitted for a major bleeding episode from September 2013 through May 2016. In all, 220 of the patients were on NOACs, and 654 were on VKAs.

Intracranial bleeds occurred in 44% of all patients, but were significantly less common among patients on NOACs than on VKAs (22% vs, 52%, respectively, odds ratio 0.26, P less than .001), whereas gastrointestinal bleeds, which occurred in 30% of all patients, were more frequent with the newer oral agents than with the older VKAs (46% vs. 30%, OR 2.69, P less than .001).

Deaths within 30 days of emergency department admission were less frequent with NOACs (10% vs. 17%, hazard ratio 0.56, P = .012).

“But when we analyzed the subpopulation of patients with different sites of bleeding, we saw that among intracranial hemorrhage, the rate was equal among NOAC and VKAs patients, 25% in both groups,” Dr. Franco said.

Deaths from gastrointestinal bleeding were numerically lower among patients on NOACs (7% vs. 10%), but this difference was not statistically significant.

“The great advantages of the new oral anticoagulants are the reduced risk in intracranial hemorrhage, so we showed that the lower mortality is not due to an intrinsic capacity to reduce deaths by NOACs as compared to VKAs, but to a different pattern of bleeding sites,” Dr. Franco said.

The study funding source was not disclosed. Dr. Franco did not report relevant disclosures.

Copenhagen – A real-life comparison of major bleeding risk with anticoagulants showed that in-hospital mortality was lower with novel oral agents than with vitamin K antagonists, but the risk varied by bleeding site.

Novel oral anticoagulants (NOACs) such as dabigatran (Pradaxa), rivaroxaban (Xarelto), and apixaban (Eliquis) were associated in randomized phase III clinical trials with lower incidences of major bleeding than vitamin K antagonists (VKA) such as warfarin, and the newer, heavily advertised agents are widely used in clinical practice, noted Dr. Laura Franco of the Stroke Unit at the University of Perugia, Italy.

“But there is [little] information about the management and outcomes of major bleeding with NOACs in real life,” she said at a briefing at the annual congress of the European Hematology Association.

Neil Osterweil/Frontline Medical News

To rectify this situation, Dr. Franco and her colleagues at nine Italian hospitals and the NOAC registry based in Dresden, Germany, looked at 30-day mortality and other outcomes among 874 consecutive patients admitted for a major bleeding episode from September 2013 through May 2016. In all, 220 of the patients were on NOACs, and 654 were on VKAs.

Intracranial bleeds occurred in 44% of all patients, but were significantly less common among patients on NOACs than on VKAs (22% vs, 52%, respectively, odds ratio 0.26, P less than .001), whereas gastrointestinal bleeds, which occurred in 30% of all patients, were more frequent with the newer oral agents than with the older VKAs (46% vs. 30%, OR 2.69, P less than .001).

Deaths within 30 days of emergency department admission were less frequent with NOACs (10% vs. 17%, hazard ratio 0.56, P = .012).

“But when we analyzed the subpopulation of patients with different sites of bleeding, we saw that among intracranial hemorrhage, the rate was equal among NOAC and VKAs patients, 25% in both groups,” Dr. Franco said.

Deaths from gastrointestinal bleeding were numerically lower among patients on NOACs (7% vs. 10%), but this difference was not statistically significant.

“The great advantages of the new oral anticoagulants are the reduced risk in intracranial hemorrhage, so we showed that the lower mortality is not due to an intrinsic capacity to reduce deaths by NOACs as compared to VKAs, but to a different pattern of bleeding sites,” Dr. Franco said.

The study funding source was not disclosed. Dr. Franco did not report relevant disclosures.

Copenhagen – Investigators in Italy have found that a recently identified form of inherited thrombocytopenia related to mutations in the gene ETV6 (ETV6-RT) appears to be largely asymptomatic, but puts patients at significantly increased risk for hematologic malignancies, particularly childhood B-cell acute lymphoblastic leukemia (ALL).

“When we are talking about ETV6-related thrombocytopenia patients, we must pay more attention to this hidden but very dangerous risk of developing blood cancer – so that we can define prognosis and plan a personalized follow-up – [rather] than to bleeding complications, which are rare and usually do not affect the quality of life,” said Dr. Federica Melazzini from the University of Pavia, Italy.

Neil Osterweil/Frontline Medical News

At a briefing at the annual congress of the European Hematology Association, Dr. Melazzini described a prospective study of the clinical and laboratory features of the newly identified disorder, with a focus on its association with hematologic cancers.

They enrolled 130 unrelated consecutive patients with inherited thrombocytopenias (IT) who did not have definitive diagnoses because they did exhibit criteria for any of the known forms of IT.

The investigators used whole exome sequencing or Sanger sequencing to look for mutations in ETV6, and when a mutation was identified, all available relatives of the affected participant (proband) also were evaluated. The authors also included data on five patients from two families known to have ETV6-RT from previous studies.

The participants were evaluated with complete blood counts, platelet sizing, flow cytometry studies of platelet membrane glycoproteins, as well as platelet aggregation, activation, adhesion and spreading. Other evaluations included differentiation of human megakaryocytes, morphological analysis of megakaryocytes, megakaryocytes flow cytometry, and evaluation of pro-platelet formation by megakaryocytes differentiated in vitro.

The investigators identified a total of 20 patients from 7 families bearing 5 different mutations in ETV6. Although these patients had only mild thrombocytopenias and a low bleeding tendency, 4 of the 20 had childhood ALL, supporting the association between ETV6 mutations and early leukemic transformation.

This translated into an incidence rate for hematologic malignancies of nearly 1 in 100 persons per year, compared with 1 in 10,000 per year in the general population, Dr. Melazzini said.

The investigators also noted that one patient developed Janus kinase 2 (JAK2)-positive polycythemia vera at age 37 years, “suggesting that this disease should be added to the list of malignancies to which the ETV6-RT predisposes.”

Dr. Melazzini said that clinicians should suspect ETV6-RT when a patient presents with an autosomal inherited thrombocytopenia without platelet macrocytosis, and should confirm the diagnosis with genetic analysis.

Patients also should be followed with whole blood cell counts and peripheral blood smear evaluations every 6-12 months, she recommended.

Dr Anton Hagenbeek, professor of hematology at the University of Amsterdam, who moderated the briefing but was not involved in the study, asked how clinicians should communicate the increased risk of hematologic malignancies to the patients.

Dr. Melazzini replied that patients need counseling about the risks of developing ALL or of passing on the trait if they plan to have children. Additionally, if patients develop ALL, the family should be cautioned against using a related donor for any allogeneic stem cell transplants, she said.

The study funding source was not disclosed. Dr. Melazzini and Dr. Hagenbeek reported no relevant disclosures.

Copenhagen – Investigators in Italy have found that a recently identified form of inherited thrombocytopenia related to mutations in the gene ETV6 (ETV6-RT) appears to be largely asymptomatic, but puts patients at significantly increased risk for hematologic malignancies, particularly childhood B-cell acute lymphoblastic leukemia (ALL).

“When we are talking about ETV6-related thrombocytopenia patients, we must pay more attention to this hidden but very dangerous risk of developing blood cancer – so that we can define prognosis and plan a personalized follow-up – [rather] than to bleeding complications, which are rare and usually do not affect the quality of life,” said Dr. Federica Melazzini from the University of Pavia, Italy.

Neil Osterweil/Frontline Medical News

At a briefing at the annual congress of the European Hematology Association, Dr. Melazzini described a prospective study of the clinical and laboratory features of the newly identified disorder, with a focus on its association with hematologic cancers.

They enrolled 130 unrelated consecutive patients with inherited thrombocytopenias (IT) who did not have definitive diagnoses because they did exhibit criteria for any of the known forms of IT.

The investigators used whole exome sequencing or Sanger sequencing to look for mutations in ETV6, and when a mutation was identified, all available relatives of the affected participant (proband) also were evaluated. The authors also included data on five patients from two families known to have ETV6-RT from previous studies.

The participants were evaluated with complete blood counts, platelet sizing, flow cytometry studies of platelet membrane glycoproteins, as well as platelet aggregation, activation, adhesion and spreading. Other evaluations included differentiation of human megakaryocytes, morphological analysis of megakaryocytes, megakaryocytes flow cytometry, and evaluation of pro-platelet formation by megakaryocytes differentiated in vitro.

The investigators identified a total of 20 patients from 7 families bearing 5 different mutations in ETV6. Although these patients had only mild thrombocytopenias and a low bleeding tendency, 4 of the 20 had childhood ALL, supporting the association between ETV6 mutations and early leukemic transformation.

This translated into an incidence rate for hematologic malignancies of nearly 1 in 100 persons per year, compared with 1 in 10,000 per year in the general population, Dr. Melazzini said.

The investigators also noted that one patient developed Janus kinase 2 (JAK2)-positive polycythemia vera at age 37 years, “suggesting that this disease should be added to the list of malignancies to which the ETV6-RT predisposes.”

Dr. Melazzini said that clinicians should suspect ETV6-RT when a patient presents with an autosomal inherited thrombocytopenia without platelet macrocytosis, and should confirm the diagnosis with genetic analysis.

Patients also should be followed with whole blood cell counts and peripheral blood smear evaluations every 6-12 months, she recommended.

Dr Anton Hagenbeek, professor of hematology at the University of Amsterdam, who moderated the briefing but was not involved in the study, asked how clinicians should communicate the increased risk of hematologic malignancies to the patients.

Dr. Melazzini replied that patients need counseling about the risks of developing ALL or of passing on the trait if they plan to have children. Additionally, if patients develop ALL, the family should be cautioned against using a related donor for any allogeneic stem cell transplants, she said.

The study funding source was not disclosed. Dr. Melazzini and Dr. Hagenbeek reported no relevant disclosures.

Copenhagen – Investigators in Italy have found that a recently identified form of inherited thrombocytopenia related to mutations in the gene ETV6 (ETV6-RT) appears to be largely asymptomatic, but puts patients at significantly increased risk for hematologic malignancies, particularly childhood B-cell acute lymphoblastic leukemia (ALL).

“When we are talking about ETV6-related thrombocytopenia patients, we must pay more attention to this hidden but very dangerous risk of developing blood cancer – so that we can define prognosis and plan a personalized follow-up – [rather] than to bleeding complications, which are rare and usually do not affect the quality of life,” said Dr. Federica Melazzini from the University of Pavia, Italy.

Neil Osterweil/Frontline Medical News

At a briefing at the annual congress of the European Hematology Association, Dr. Melazzini described a prospective study of the clinical and laboratory features of the newly identified disorder, with a focus on its association with hematologic cancers.

They enrolled 130 unrelated consecutive patients with inherited thrombocytopenias (IT) who did not have definitive diagnoses because they did exhibit criteria for any of the known forms of IT.

The investigators used whole exome sequencing or Sanger sequencing to look for mutations in ETV6, and when a mutation was identified, all available relatives of the affected participant (proband) also were evaluated. The authors also included data on five patients from two families known to have ETV6-RT from previous studies.

The participants were evaluated with complete blood counts, platelet sizing, flow cytometry studies of platelet membrane glycoproteins, as well as platelet aggregation, activation, adhesion and spreading. Other evaluations included differentiation of human megakaryocytes, morphological analysis of megakaryocytes, megakaryocytes flow cytometry, and evaluation of pro-platelet formation by megakaryocytes differentiated in vitro.

The investigators identified a total of 20 patients from 7 families bearing 5 different mutations in ETV6. Although these patients had only mild thrombocytopenias and a low bleeding tendency, 4 of the 20 had childhood ALL, supporting the association between ETV6 mutations and early leukemic transformation.

This translated into an incidence rate for hematologic malignancies of nearly 1 in 100 persons per year, compared with 1 in 10,000 per year in the general population, Dr. Melazzini said.

The investigators also noted that one patient developed Janus kinase 2 (JAK2)-positive polycythemia vera at age 37 years, “suggesting that this disease should be added to the list of malignancies to which the ETV6-RT predisposes.”

Dr. Melazzini said that clinicians should suspect ETV6-RT when a patient presents with an autosomal inherited thrombocytopenia without platelet macrocytosis, and should confirm the diagnosis with genetic analysis.

Patients also should be followed with whole blood cell counts and peripheral blood smear evaluations every 6-12 months, she recommended.

Dr Anton Hagenbeek, professor of hematology at the University of Amsterdam, who moderated the briefing but was not involved in the study, asked how clinicians should communicate the increased risk of hematologic malignancies to the patients.

Dr. Melazzini replied that patients need counseling about the risks of developing ALL or of passing on the trait if they plan to have children. Additionally, if patients develop ALL, the family should be cautioned against using a related donor for any allogeneic stem cell transplants, she said.

The study funding source was not disclosed. Dr. Melazzini and Dr. Hagenbeek reported no relevant disclosures.

Non-neutralizing, factor VIII–specific IgG antibodies can contribute significantly to reductions in factor VIII half-life in patients with hemophilia A, according to a study published online in Blood.

Screening for factor VIII–specific IgG may aid in tailoring factor VIII prophylactic regimens for hemophilia A patients, said Christoph J. Hofbauer, Ph.D., of the biopharmaceutical company Baxalta in Vienna, and his associates at the Medical University of Vienna.

The researchers examined the effect of factor VIII–specific IgG antibodies on factor VIII half-life in 42 adult patients with hemophilia A without inhibitors. Patients ranged in age from 18-61 years, and 37 of them had severe disease. Of the cohort, 31 received recombinant factor VIII concentrates and 11 received plasma-derived factor VIII concentrates (Blood. 2016 May 23 [Epub ahead of print])

In the initial antibody screen, 15 patients tested positive for factor VIII–binding IgG with titers of at least 1:20. Factor VIII–specific antibodies were found at titers of at least 1:40 in 9 of the 15 subjects. Most had low- to moderate-affinity IgG1 and IgG3 antibodies. One patient with high-affinity IgG4 antibodies went on to develop low titers of factor VIII inhibitors.

Patients with factor VIII–specific antibodies had a shorter factor VIII half-life (median 7.8 hours) than did patients without antibodies (median 10.4 hours).

Dr. Hofbauer is employed by Baxalta, which makes a variety of antihemophilic factors.

[email protected]

On Twitter @maryjodales

Non-neutralizing, factor VIII–specific IgG antibodies can contribute significantly to reductions in factor VIII half-life in patients with hemophilia A, according to a study published online in Blood.

Screening for factor VIII–specific IgG may aid in tailoring factor VIII prophylactic regimens for hemophilia A patients, said Christoph J. Hofbauer, Ph.D., of the biopharmaceutical company Baxalta in Vienna, and his associates at the Medical University of Vienna.

The researchers examined the effect of factor VIII–specific IgG antibodies on factor VIII half-life in 42 adult patients with hemophilia A without inhibitors. Patients ranged in age from 18-61 years, and 37 of them had severe disease. Of the cohort, 31 received recombinant factor VIII concentrates and 11 received plasma-derived factor VIII concentrates (Blood. 2016 May 23 [Epub ahead of print])

In the initial antibody screen, 15 patients tested positive for factor VIII–binding IgG with titers of at least 1:20. Factor VIII–specific antibodies were found at titers of at least 1:40 in 9 of the 15 subjects. Most had low- to moderate-affinity IgG1 and IgG3 antibodies. One patient with high-affinity IgG4 antibodies went on to develop low titers of factor VIII inhibitors.

Patients with factor VIII–specific antibodies had a shorter factor VIII half-life (median 7.8 hours) than did patients without antibodies (median 10.4 hours).

Dr. Hofbauer is employed by Baxalta, which makes a variety of antihemophilic factors.

[email protected]

On Twitter @maryjodales

Non-neutralizing, factor VIII–specific IgG antibodies can contribute significantly to reductions in factor VIII half-life in patients with hemophilia A, according to a study published online in Blood.

Screening for factor VIII–specific IgG may aid in tailoring factor VIII prophylactic regimens for hemophilia A patients, said Christoph J. Hofbauer, Ph.D., of the biopharmaceutical company Baxalta in Vienna, and his associates at the Medical University of Vienna.

The researchers examined the effect of factor VIII–specific IgG antibodies on factor VIII half-life in 42 adult patients with hemophilia A without inhibitors. Patients ranged in age from 18-61 years, and 37 of them had severe disease. Of the cohort, 31 received recombinant factor VIII concentrates and 11 received plasma-derived factor VIII concentrates (Blood. 2016 May 23 [Epub ahead of print])

In the initial antibody screen, 15 patients tested positive for factor VIII–binding IgG with titers of at least 1:20. Factor VIII–specific antibodies were found at titers of at least 1:40 in 9 of the 15 subjects. Most had low- to moderate-affinity IgG1 and IgG3 antibodies. One patient with high-affinity IgG4 antibodies went on to develop low titers of factor VIII inhibitors.

Patients with factor VIII–specific antibodies had a shorter factor VIII half-life (median 7.8 hours) than did patients without antibodies (median 10.4 hours).

Dr. Hofbauer is employed by Baxalta, which makes a variety of antihemophilic factors.

[email protected]

On Twitter @maryjodales

Patients with severe hemophilia A treated with plasma-derived factor VIII, as compared with recombinant factor VIII, had a lower risk of developing neutralizing antibodies, based on a recent report from the randomized SIPPET trial published in the New England Journal of Medicine.

In a second study, also published in the journal, prophylactic treatment with the bispecific antibody emicizumab decreased bleeding in patients with or without neutralizing antibodies.

Crystal/Wikimedia Commons/Creative Commons Attribution 2.0

Of 125 patients with severe hemophilia A who were treated with plasma-derived factor VIII with von Willebrand factor, 29 (23.2%) developed inhibitors, compared with 47 of 126 patients (37.3%) treated with recombinant factor VIII. In the plasma-derived group, 20 (16.0%) had high-titer inhibitors compared with 30 (23.8%) in the recombinant group. Cox regression models showed an 87% higher rate of inhibitor development with recombinant factor VIII (hazard ratio, 1.87; 95% confidence interval, 1.17-2.96). For development of high-titer inhibitors, the HR was 1.69 (95% CI, 0.96-2.98).

Previous observational studies have suggested greater immunogenicity of recombinant vs. plasm-derived factor VIII, but the results remained inconclusive. Meta-analyses of studies have been hindered by differences in design, enrollment criteria, definition of hemophilia A, sample size, method of inhibitor detection, and intervals of follow-up testing, according to Dr. Flora Peyvandi of the IRCCS Maggiore Hospital, University of Milan and colleagues. “Our trial was specifically designed to compare the immunogenicity of factor VIII products. As a result of randomization, the main risk factors for inhibitor development were evenly distributed between the two factor VIII classes,” they wrote, adding, “The finding that native factor VIII products from human plasma are less immunogenic than those engineered by recombinant DNA technology in animal cell lines has the potential to affect treatment strategies and open new investigations to better understand the mechanisms of the immunogenicity of various factor VIII preparations.” (N Engl J Med. 2016 May 25. doi: 10.1200/JCO.2015.64.0730).

The Survey of Inhibitors in Plasma-Product Exposed Toddlers (SIPPET) clinical trial randomized 251 patients with severe hemophilia A who received infusions of plasma-derived or recombinant factor VIII. The investigators found no association between risk of inhibitor development and race, intensity of treatment, or age at first treatment.

The second study, a 12-week dose-escalation trial of emicizumab, included 18 patients with severe hemophilia A, aged 12-59 years. Patients were assigned to one of three cohorts and received a once-weekly subcutaneous dose of 0.3, 1, or 3 mg per kilogram of body weight. During prophylactic emicizumab treatment, median annualized bleeding rates decreased from 32.5 (range, 8.1-77.1) to 4.4 (0.0-59.5) in cohort 1, from 18.3 (range, 10.1-38.6) to 0.0 (range, 0.0-4.3) in cohort 2, and from 15.2 (range, 0.0-32.5) to 0.0 (range, 0.0-4.2) in cohort 3. The annualized bleeding rate decreased regardless of factor VIII inhibitor status. Of 11 patients with factor VIII inhibitors, 8 (73%) had no bleeding episodes; 5 of 7 patients without factor VIII inhibitors (71%) had no bleeding episodes.

“This study showed that once-weekly subcutaneous administration of emicizumab as prophylaxis is safe and has the potential to reduce or prevent bleeding episodes in patients who have severe hemophilia A with or without factor VIII inhibitors,” wrote Dr. Midori Shima of Nara Medical University, Kashihara, Japan, and colleagues (N. Engl J Med. 2016 May 25. doi: 10.1056/NEJMoa1511769).

Emicizumab had an acceptable safety profile. In total, 43 adverse events were reported in 15 of 18 patients. All were mild, except two moderate events – an upper respiratory tract infection and a headache. Events thought to be treatment related included malaise, injection-site erythema, injection-site rash, diarrhea, increased C-reactive protein level, and increased blood creatine kinase level.

Dr. Peyvandi and coauthors disclosed consulting, advising, research funding and other relationships with several industry sources, including Grifols, Kedrion, and LFB. Dr. Shima and coauthors disclosed consulting, advising, research funding and other relationships with several industry sources, including Chugai Pharmaceuticals, which supported the study.

Patients with severe hemophilia A treated with plasma-derived factor VIII, as compared with recombinant factor VIII, had a lower risk of developing neutralizing antibodies, based on a recent report from the randomized SIPPET trial published in the New England Journal of Medicine.

In a second study, also published in the journal, prophylactic treatment with the bispecific antibody emicizumab decreased bleeding in patients with or without neutralizing antibodies.

Crystal/Wikimedia Commons/Creative Commons Attribution 2.0

Of 125 patients with severe hemophilia A who were treated with plasma-derived factor VIII with von Willebrand factor, 29 (23.2%) developed inhibitors, compared with 47 of 126 patients (37.3%) treated with recombinant factor VIII. In the plasma-derived group, 20 (16.0%) had high-titer inhibitors compared with 30 (23.8%) in the recombinant group. Cox regression models showed an 87% higher rate of inhibitor development with recombinant factor VIII (hazard ratio, 1.87; 95% confidence interval, 1.17-2.96). For development of high-titer inhibitors, the HR was 1.69 (95% CI, 0.96-2.98).

Previous observational studies have suggested greater immunogenicity of recombinant vs. plasm-derived factor VIII, but the results remained inconclusive. Meta-analyses of studies have been hindered by differences in design, enrollment criteria, definition of hemophilia A, sample size, method of inhibitor detection, and intervals of follow-up testing, according to Dr. Flora Peyvandi of the IRCCS Maggiore Hospital, University of Milan and colleagues. “Our trial was specifically designed to compare the immunogenicity of factor VIII products. As a result of randomization, the main risk factors for inhibitor development were evenly distributed between the two factor VIII classes,” they wrote, adding, “The finding that native factor VIII products from human plasma are less immunogenic than those engineered by recombinant DNA technology in animal cell lines has the potential to affect treatment strategies and open new investigations to better understand the mechanisms of the immunogenicity of various factor VIII preparations.” (N Engl J Med. 2016 May 25. doi: 10.1200/JCO.2015.64.0730).

The Survey of Inhibitors in Plasma-Product Exposed Toddlers (SIPPET) clinical trial randomized 251 patients with severe hemophilia A who received infusions of plasma-derived or recombinant factor VIII. The investigators found no association between risk of inhibitor development and race, intensity of treatment, or age at first treatment.

The second study, a 12-week dose-escalation trial of emicizumab, included 18 patients with severe hemophilia A, aged 12-59 years. Patients were assigned to one of three cohorts and received a once-weekly subcutaneous dose of 0.3, 1, or 3 mg per kilogram of body weight. During prophylactic emicizumab treatment, median annualized bleeding rates decreased from 32.5 (range, 8.1-77.1) to 4.4 (0.0-59.5) in cohort 1, from 18.3 (range, 10.1-38.6) to 0.0 (range, 0.0-4.3) in cohort 2, and from 15.2 (range, 0.0-32.5) to 0.0 (range, 0.0-4.2) in cohort 3. The annualized bleeding rate decreased regardless of factor VIII inhibitor status. Of 11 patients with factor VIII inhibitors, 8 (73%) had no bleeding episodes; 5 of 7 patients without factor VIII inhibitors (71%) had no bleeding episodes.

“This study showed that once-weekly subcutaneous administration of emicizumab as prophylaxis is safe and has the potential to reduce or prevent bleeding episodes in patients who have severe hemophilia A with or without factor VIII inhibitors,” wrote Dr. Midori Shima of Nara Medical University, Kashihara, Japan, and colleagues (N. Engl J Med. 2016 May 25. doi: 10.1056/NEJMoa1511769).

Emicizumab had an acceptable safety profile. In total, 43 adverse events were reported in 15 of 18 patients. All were mild, except two moderate events – an upper respiratory tract infection and a headache. Events thought to be treatment related included malaise, injection-site erythema, injection-site rash, diarrhea, increased C-reactive protein level, and increased blood creatine kinase level.

Dr. Peyvandi and coauthors disclosed consulting, advising, research funding and other relationships with several industry sources, including Grifols, Kedrion, and LFB. Dr. Shima and coauthors disclosed consulting, advising, research funding and other relationships with several industry sources, including Chugai Pharmaceuticals, which supported the study.

Patients with severe hemophilia A treated with plasma-derived factor VIII, as compared with recombinant factor VIII, had a lower risk of developing neutralizing antibodies, based on a recent report from the randomized SIPPET trial published in the New England Journal of Medicine.

In a second study, also published in the journal, prophylactic treatment with the bispecific antibody emicizumab decreased bleeding in patients with or without neutralizing antibodies.

Crystal/Wikimedia Commons/Creative Commons Attribution 2.0

Of 125 patients with severe hemophilia A who were treated with plasma-derived factor VIII with von Willebrand factor, 29 (23.2%) developed inhibitors, compared with 47 of 126 patients (37.3%) treated with recombinant factor VIII. In the plasma-derived group, 20 (16.0%) had high-titer inhibitors compared with 30 (23.8%) in the recombinant group. Cox regression models showed an 87% higher rate of inhibitor development with recombinant factor VIII (hazard ratio, 1.87; 95% confidence interval, 1.17-2.96). For development of high-titer inhibitors, the HR was 1.69 (95% CI, 0.96-2.98).

Previous observational studies have suggested greater immunogenicity of recombinant vs. plasm-derived factor VIII, but the results remained inconclusive. Meta-analyses of studies have been hindered by differences in design, enrollment criteria, definition of hemophilia A, sample size, method of inhibitor detection, and intervals of follow-up testing, according to Dr. Flora Peyvandi of the IRCCS Maggiore Hospital, University of Milan and colleagues. “Our trial was specifically designed to compare the immunogenicity of factor VIII products. As a result of randomization, the main risk factors for inhibitor development were evenly distributed between the two factor VIII classes,” they wrote, adding, “The finding that native factor VIII products from human plasma are less immunogenic than those engineered by recombinant DNA technology in animal cell lines has the potential to affect treatment strategies and open new investigations to better understand the mechanisms of the immunogenicity of various factor VIII preparations.” (N Engl J Med. 2016 May 25. doi: 10.1200/JCO.2015.64.0730).

The Survey of Inhibitors in Plasma-Product Exposed Toddlers (SIPPET) clinical trial randomized 251 patients with severe hemophilia A who received infusions of plasma-derived or recombinant factor VIII. The investigators found no association between risk of inhibitor development and race, intensity of treatment, or age at first treatment.

The second study, a 12-week dose-escalation trial of emicizumab, included 18 patients with severe hemophilia A, aged 12-59 years. Patients were assigned to one of three cohorts and received a once-weekly subcutaneous dose of 0.3, 1, or 3 mg per kilogram of body weight. During prophylactic emicizumab treatment, median annualized bleeding rates decreased from 32.5 (range, 8.1-77.1) to 4.4 (0.0-59.5) in cohort 1, from 18.3 (range, 10.1-38.6) to 0.0 (range, 0.0-4.3) in cohort 2, and from 15.2 (range, 0.0-32.5) to 0.0 (range, 0.0-4.2) in cohort 3. The annualized bleeding rate decreased regardless of factor VIII inhibitor status. Of 11 patients with factor VIII inhibitors, 8 (73%) had no bleeding episodes; 5 of 7 patients without factor VIII inhibitors (71%) had no bleeding episodes.

“This study showed that once-weekly subcutaneous administration of emicizumab as prophylaxis is safe and has the potential to reduce or prevent bleeding episodes in patients who have severe hemophilia A with or without factor VIII inhibitors,” wrote Dr. Midori Shima of Nara Medical University, Kashihara, Japan, and colleagues (N. Engl J Med. 2016 May 25. doi: 10.1056/NEJMoa1511769).

Emicizumab had an acceptable safety profile. In total, 43 adverse events were reported in 15 of 18 patients. All were mild, except two moderate events – an upper respiratory tract infection and a headache. Events thought to be treatment related included malaise, injection-site erythema, injection-site rash, diarrhea, increased C-reactive protein level, and increased blood creatine kinase level.

Dr. Peyvandi and coauthors disclosed consulting, advising, research funding and other relationships with several industry sources, including Grifols, Kedrion, and LFB. Dr. Shima and coauthors disclosed consulting, advising, research funding and other relationships with several industry sources, including Chugai Pharmaceuticals, which supported the study.

ORLANDO – The hematologic cancer drug ruxolitinib seems to be associated with cases of aggressive nonmelanoma skin cancer.

After treating a very aggressive squamous cell carcinoma in a 55-year-old man treated with ruxolitinib for polycythemia vera, and hearing firsthand of three other similar cases, Dr. Fiona Zwald is collecting additional data on the association. She intends to publish these cases in a monograph as a warning to dermatologists, hematologists, oncologists, and other physicians who manage patients with hematologic malignancies, she said at the annual meeting of the American College of Mohs Surgery.

The prescribing information for ruxolitinib (Jakafi, Incyte Pharmaceuticals; Jakavi, Novartis) was updated in 2014 to warn that patients taking the drug face an increased risk of nonmelanoma skin cancers. The label also recommends that physicians inspect the skin regularly and urge patients to be alert for and report any new or changing lesions.

Despite the warnings and recommendations, cases are occurring – and some are quite serious, said Dr. Zwald, a Mohs surgeon in Atlanta.

“People should know this is actually happening. If you have experience with this medication, please let us know so we can compile this report. We are trying to assess the number of skin cancers before and after initiating this medication,” she said.

Courtesy Dr. Fiona Zwald

Ruxolitinib is an inhibitor of Janus kinase with a special affinity for the JAK1 and JAK2 subtypes. Like other cytokine-signaling molecules, their function depends on cell context; it may inhibit cell growth in one setting, and, in another, stimulate it. Ruxolitinib was initially approved in 2011 for the treatment of intermediate- and high-risk myelofibrosis, including primary myelofibrosis, post–polycythemia vera myelofibrosis, and post–essential thrombocythemia myelofibrosis.

In 2014, indications for ruxolitinib were expanded to include treatment of patients with polycythemia vera who have had an inadequate response to or are intolerant of hydroxyurea.

Dr. Zwald’s patient had a 10-year history of polycythemia vera. He was initially well controlled on the standard hydroxyurea treatment. In the meantime, he began working as a caddy at a major U.S. golf club. He developed many facial squamous cell carcinomas that were treated with excision and radiation. A year before he presented to Dr. Zwald, he stopped responding to hydroxyurea and was placed on ruxolitinib.

The patient presented with a 4-cm ulcerated lesion over part of his right temple and to the right helical crus; the lesion had developed over 3 months. Dr. Zwald consulted with the patient’s medical oncologist; treatment with ruxolitinib continued, albeit at a reduced dosage in light of recent events.

She performed Mohs surgery on the patient. It was a challenging case, she said, not the least because adequate anesthesia could not be achieved with local anesthetic. Preoperative staging showed no nodal spread.

“He did, unfortunately demonstrate a large, indurated mass located over one branch of the superficial temporal artery. At the helical crus there was an area of bound-down, fixed tumor. Knowing that I would not be able to fully resect this, I passed him on to the operating room,” Dr. Zwald said. “This tumor was found to extend down to the parotid capsule, but margins were clear.” The surgical defect was successfully repaired with a split-thickness skin graft.

The tumor recurred about 3 months later, and the patient underwent another surgery.

“This time we could not get clear surgical margins, and the tumor was approaching the external auditory meatus. Surgery was abandoned due to fears of complications to that area,” she said.

She presented the case at tumor board, during which she and her colleagues discussed adjuvant radiation. They initially abandoned this idea because he had already had so much radiation to his face. After the second surgery, they decide to proceed with radiation. “The next conversation we have will be whether to add another adjuvant therapy to treatment.”

She sent out the case and requests for feedback to the International Transplant Skin Cancer Collaborative, an 800-member consortium of dermatologists and Mohs surgeons who take care of transplant patients. She received information on three additional cases of aggressive squamous cell carcinoma (SCC) associated with ruxolitinib treatment:

• A patient with myelodysplastic syndrome with aggressive scalp SCC with cutaneous metastases.

• A patient with undifferentiated pleomorphic sarcoma of the scalp, several cutaneous SCCs.

• A patient with a myelodysplastic syndrome with in-transit metastases and explosive cutaneous SCCs. The patient has had the ruxolitinib dose reduced and may be switched to capecitabine.

Dr. Zwald noted that her patient was at risk for aggressive skin cancers for reasons in addition to ruxolitinib treatment.

“He was already immunosuppressed from his malignancy. He was on hydroxyurea, a drug that’s a cumulative phototoxin, and he’s out in the sun playing golf every day, and then was put on ruxolitinib. But the question we face now is how to try and stop this medication so we can get better treatment for him which will, of course, be very difficult.”

To contribute to Dr. Zwald’s case series, please email her at [email protected].

She had no relevant financial disclosures.

[email protected]

On Twitter @Alz_Gal

ORLANDO – The hematologic cancer drug ruxolitinib seems to be associated with cases of aggressive nonmelanoma skin cancer.

After treating a very aggressive squamous cell carcinoma in a 55-year-old man treated with ruxolitinib for polycythemia vera, and hearing firsthand of three other similar cases, Dr. Fiona Zwald is collecting additional data on the association. She intends to publish these cases in a monograph as a warning to dermatologists, hematologists, oncologists, and other physicians who manage patients with hematologic malignancies, she said at the annual meeting of the American College of Mohs Surgery.

The prescribing information for ruxolitinib (Jakafi, Incyte Pharmaceuticals; Jakavi, Novartis) was updated in 2014 to warn that patients taking the drug face an increased risk of nonmelanoma skin cancers. The label also recommends that physicians inspect the skin regularly and urge patients to be alert for and report any new or changing lesions.

Despite the warnings and recommendations, cases are occurring – and some are quite serious, said Dr. Zwald, a Mohs surgeon in Atlanta.

“People should know this is actually happening. If you have experience with this medication, please let us know so we can compile this report. We are trying to assess the number of skin cancers before and after initiating this medication,” she said.

Courtesy Dr. Fiona Zwald

Ruxolitinib is an inhibitor of Janus kinase with a special affinity for the JAK1 and JAK2 subtypes. Like other cytokine-signaling molecules, their function depends on cell context; it may inhibit cell growth in one setting, and, in another, stimulate it. Ruxolitinib was initially approved in 2011 for the treatment of intermediate- and high-risk myelofibrosis, including primary myelofibrosis, post–polycythemia vera myelofibrosis, and post–essential thrombocythemia myelofibrosis.

In 2014, indications for ruxolitinib were expanded to include treatment of patients with polycythemia vera who have had an inadequate response to or are intolerant of hydroxyurea.

Dr. Zwald’s patient had a 10-year history of polycythemia vera. He was initially well controlled on the standard hydroxyurea treatment. In the meantime, he began working as a caddy at a major U.S. golf club. He developed many facial squamous cell carcinomas that were treated with excision and radiation. A year before he presented to Dr. Zwald, he stopped responding to hydroxyurea and was placed on ruxolitinib.

The patient presented with a 4-cm ulcerated lesion over part of his right temple and to the right helical crus; the lesion had developed over 3 months. Dr. Zwald consulted with the patient’s medical oncologist; treatment with ruxolitinib continued, albeit at a reduced dosage in light of recent events.

She performed Mohs surgery on the patient. It was a challenging case, she said, not the least because adequate anesthesia could not be achieved with local anesthetic. Preoperative staging showed no nodal spread.

“He did, unfortunately demonstrate a large, indurated mass located over one branch of the superficial temporal artery. At the helical crus there was an area of bound-down, fixed tumor. Knowing that I would not be able to fully resect this, I passed him on to the operating room,” Dr. Zwald said. “This tumor was found to extend down to the parotid capsule, but margins were clear.” The surgical defect was successfully repaired with a split-thickness skin graft.

The tumor recurred about 3 months later, and the patient underwent another surgery.

“This time we could not get clear surgical margins, and the tumor was approaching the external auditory meatus. Surgery was abandoned due to fears of complications to that area,” she said.

She presented the case at tumor board, during which she and her colleagues discussed adjuvant radiation. They initially abandoned this idea because he had already had so much radiation to his face. After the second surgery, they decide to proceed with radiation. “The next conversation we have will be whether to add another adjuvant therapy to treatment.”

She sent out the case and requests for feedback to the International Transplant Skin Cancer Collaborative, an 800-member consortium of dermatologists and Mohs surgeons who take care of transplant patients. She received information on three additional cases of aggressive squamous cell carcinoma (SCC) associated with ruxolitinib treatment:

• A patient with myelodysplastic syndrome with aggressive scalp SCC with cutaneous metastases.

• A patient with undifferentiated pleomorphic sarcoma of the scalp, several cutaneous SCCs.

• A patient with a myelodysplastic syndrome with in-transit metastases and explosive cutaneous SCCs. The patient has had the ruxolitinib dose reduced and may be switched to capecitabine.

Dr. Zwald noted that her patient was at risk for aggressive skin cancers for reasons in addition to ruxolitinib treatment.

“He was already immunosuppressed from his malignancy. He was on hydroxyurea, a drug that’s a cumulative phototoxin, and he’s out in the sun playing golf every day, and then was put on ruxolitinib. But the question we face now is how to try and stop this medication so we can get better treatment for him which will, of course, be very difficult.”

To contribute to Dr. Zwald’s case series, please email her at [email protected].

She had no relevant financial disclosures.

[email protected]

On Twitter @Alz_Gal

ORLANDO – The hematologic cancer drug ruxolitinib seems to be associated with cases of aggressive nonmelanoma skin cancer.

After treating a very aggressive squamous cell carcinoma in a 55-year-old man treated with ruxolitinib for polycythemia vera, and hearing firsthand of three other similar cases, Dr. Fiona Zwald is collecting additional data on the association. She intends to publish these cases in a monograph as a warning to dermatologists, hematologists, oncologists, and other physicians who manage patients with hematologic malignancies, she said at the annual meeting of the American College of Mohs Surgery.

The prescribing information for ruxolitinib (Jakafi, Incyte Pharmaceuticals; Jakavi, Novartis) was updated in 2014 to warn that patients taking the drug face an increased risk of nonmelanoma skin cancers. The label also recommends that physicians inspect the skin regularly and urge patients to be alert for and report any new or changing lesions.

Despite the warnings and recommendations, cases are occurring – and some are quite serious, said Dr. Zwald, a Mohs surgeon in Atlanta.

“People should know this is actually happening. If you have experience with this medication, please let us know so we can compile this report. We are trying to assess the number of skin cancers before and after initiating this medication,” she said.

Courtesy Dr. Fiona Zwald

Ruxolitinib is an inhibitor of Janus kinase with a special affinity for the JAK1 and JAK2 subtypes. Like other cytokine-signaling molecules, their function depends on cell context; it may inhibit cell growth in one setting, and, in another, stimulate it. Ruxolitinib was initially approved in 2011 for the treatment of intermediate- and high-risk myelofibrosis, including primary myelofibrosis, post–polycythemia vera myelofibrosis, and post–essential thrombocythemia myelofibrosis.

In 2014, indications for ruxolitinib were expanded to include treatment of patients with polycythemia vera who have had an inadequate response to or are intolerant of hydroxyurea.

Dr. Zwald’s patient had a 10-year history of polycythemia vera. He was initially well controlled on the standard hydroxyurea treatment. In the meantime, he began working as a caddy at a major U.S. golf club. He developed many facial squamous cell carcinomas that were treated with excision and radiation. A year before he presented to Dr. Zwald, he stopped responding to hydroxyurea and was placed on ruxolitinib.

The patient presented with a 4-cm ulcerated lesion over part of his right temple and to the right helical crus; the lesion had developed over 3 months. Dr. Zwald consulted with the patient’s medical oncologist; treatment with ruxolitinib continued, albeit at a reduced dosage in light of recent events.

She performed Mohs surgery on the patient. It was a challenging case, she said, not the least because adequate anesthesia could not be achieved with local anesthetic. Preoperative staging showed no nodal spread.

“He did, unfortunately demonstrate a large, indurated mass located over one branch of the superficial temporal artery. At the helical crus there was an area of bound-down, fixed tumor. Knowing that I would not be able to fully resect this, I passed him on to the operating room,” Dr. Zwald said. “This tumor was found to extend down to the parotid capsule, but margins were clear.” The surgical defect was successfully repaired with a split-thickness skin graft.

The tumor recurred about 3 months later, and the patient underwent another surgery.

“This time we could not get clear surgical margins, and the tumor was approaching the external auditory meatus. Surgery was abandoned due to fears of complications to that area,” she said.

She presented the case at tumor board, during which she and her colleagues discussed adjuvant radiation. They initially abandoned this idea because he had already had so much radiation to his face. After the second surgery, they decide to proceed with radiation. “The next conversation we have will be whether to add another adjuvant therapy to treatment.”

She sent out the case and requests for feedback to the International Transplant Skin Cancer Collaborative, an 800-member consortium of dermatologists and Mohs surgeons who take care of transplant patients. She received information on three additional cases of aggressive squamous cell carcinoma (SCC) associated with ruxolitinib treatment:

• A patient with myelodysplastic syndrome with aggressive scalp SCC with cutaneous metastases.

• A patient with undifferentiated pleomorphic sarcoma of the scalp, several cutaneous SCCs.

• A patient with a myelodysplastic syndrome with in-transit metastases and explosive cutaneous SCCs. The patient has had the ruxolitinib dose reduced and may be switched to capecitabine.

Dr. Zwald noted that her patient was at risk for aggressive skin cancers for reasons in addition to ruxolitinib treatment.

“He was already immunosuppressed from his malignancy. He was on hydroxyurea, a drug that’s a cumulative phototoxin, and he’s out in the sun playing golf every day, and then was put on ruxolitinib. But the question we face now is how to try and stop this medication so we can get better treatment for him which will, of course, be very difficult.”

To contribute to Dr. Zwald’s case series, please email her at [email protected].

She had no relevant financial disclosures.

[email protected]

On Twitter @Alz_Gal

Recombinant fusion protein linking coagulation factor IX with albumin (rIX-FP) could result in a “paradigm shift” in prophylaxis regimens for patients with hemophilia B, according to researchers reporting results from a phase III trial.

At dosing intervals of up to 14 days, rIX-FP was a safe and effective factor IX (FIX) replacement product for preventing and treating bleeding episodes in an open-label study of 63 previously treated adolescents and adults with severe hemophilia B.

Compared to standard FIX products, rIX-FP is more active, has a longer half-life, and has better clearance. A study is now underway to see whether a 21-day prophylaxis regimen provides even better results than the 14-day regimen, reported Dr. Elena Santagostino of Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda Foundation, Maggiore Hospital Policlinico, Milan, and her associates in the PROLONG-9FP Investigators Study Group.

For prophylaxis, standard FIX products are administered two times per week. Patients are at increased risk of bleeding when their FIX activity is low, particularly just before their next scheduled dose. With the prolonged FIX activity of rIX-FP, the dosing is less frequent and that could potentially improve adherence, the researchers wrote (Blood. 2016;127[14]:1761-9).

In addition, rIX-FP was associated with a reduced risk of spontaneous and trauma-related bleeding episodes.

The findings came from a study of patients who had FIX activity levels of 2% or less and were assigned to one of two groups. The first group received routine prophylaxis once every 7 days for 26 weeks; they were then placed on either a 7-, 10-, or 14-day prophylaxis regimen for a mean of 50, 38, or 51 weeks, respectively. The second group received on-demand treatment of bleeding episodes for 26 weeks and were then switched to a 7-day prophylaxis regimen for a mean of 45 weeks. Only patients who were previously receiving on-demand treatment were eligible for group 2 assignment.

Patients self-administered rIX-FP for routine prophylaxis and on-demand treatment of bleeding episodes; all home administrations were recorded in an electronic diary. A second dose of rIX-FP was administered at least 24 hours after the first injection, if needed, to achieve hemostasis. Efficacy and safety assessments were performed at study sites on a monthly basis.

The study design controlled for the variability of bleeding frequency within the hemophilia B patient population, as group 2 patients started rIX-FP treatment on-demand and continued on 7-day prophylaxis. During the on-demand phase, rIX-FP controlled 98.6% of bleeding episodes, and 93.6% of bleeds were controlled with one infusion.

Once the group was switched to 7-day prophylaxis, the median annualized spontaneous bleeding rate dropped to 0.0 and all target joints resolved.(P less than .0001). No patient developed an inhibitor, and no safety concerns were identified.

The annualized bleeding rate decreased slightly in group 2 patients during on-demand treatment with rIX-FP, compared with the rate in the 12-month period before they entered the study. The researchers speculated that on-demand treatment with rIX-FP “might provide, to a certain extent, some protection against a subsequent bleeding episode. Therefore, patients with a severe bleeding phenotype treated on-demand might experience fewer bleeding episodes if switched to rIX-FP. Furthermore, such on-demand patients who require more than one infusion per month may have the benefit of a reduction of ABR by administering a similar number of infusions according to a 14-day prophylaxis regimen with rIX-FP.”

The sample size was small, however, and differences of care in the clinical study could have affected the results.

Compared to other FIX products, rIX-FP had an extended terminal half-life of 102 hours, 4.3-fold longer than seen with the patients’ previous FIX treatment. Other pharmacokinetic measures such as area under the curve (7176 h × IU/dL), clearance (0.77 mL/h per kg), and incremental recovery (1.27 IU/dL per IU/kg) also were improved. Patients maintained a mean trough of 20 and 12 IU/dL FIX activity on prophylaxis with rIX-FP 40 IU/kg every 7 days and 75 IU/kg every 14 days, respectively. Rather than half-life alone, a slower clearance may be a factor in the success of prophylaxis regimens, the researchers said.

The principal investigators received research support from CSL Behring, which sponsored the study and was responsible for trial operations and data analysis.

[email protected]

On Twitter @maryjodales

Recombinant fusion protein linking coagulation factor IX with albumin (rIX-FP) could result in a “paradigm shift” in prophylaxis regimens for patients with hemophilia B, according to researchers reporting results from a phase III trial.

At dosing intervals of up to 14 days, rIX-FP was a safe and effective factor IX (FIX) replacement product for preventing and treating bleeding episodes in an open-label study of 63 previously treated adolescents and adults with severe hemophilia B.

Compared to standard FIX products, rIX-FP is more active, has a longer half-life, and has better clearance. A study is now underway to see whether a 21-day prophylaxis regimen provides even better results than the 14-day regimen, reported Dr. Elena Santagostino of Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda Foundation, Maggiore Hospital Policlinico, Milan, and her associates in the PROLONG-9FP Investigators Study Group.

For prophylaxis, standard FIX products are administered two times per week. Patients are at increased risk of bleeding when their FIX activity is low, particularly just before their next scheduled dose. With the prolonged FIX activity of rIX-FP, the dosing is less frequent and that could potentially improve adherence, the researchers wrote (Blood. 2016;127[14]:1761-9).

In addition, rIX-FP was associated with a reduced risk of spontaneous and trauma-related bleeding episodes.

The findings came from a study of patients who had FIX activity levels of 2% or less and were assigned to one of two groups. The first group received routine prophylaxis once every 7 days for 26 weeks; they were then placed on either a 7-, 10-, or 14-day prophylaxis regimen for a mean of 50, 38, or 51 weeks, respectively. The second group received on-demand treatment of bleeding episodes for 26 weeks and were then switched to a 7-day prophylaxis regimen for a mean of 45 weeks. Only patients who were previously receiving on-demand treatment were eligible for group 2 assignment.

Patients self-administered rIX-FP for routine prophylaxis and on-demand treatment of bleeding episodes; all home administrations were recorded in an electronic diary. A second dose of rIX-FP was administered at least 24 hours after the first injection, if needed, to achieve hemostasis. Efficacy and safety assessments were performed at study sites on a monthly basis.

The study design controlled for the variability of bleeding frequency within the hemophilia B patient population, as group 2 patients started rIX-FP treatment on-demand and continued on 7-day prophylaxis. During the on-demand phase, rIX-FP controlled 98.6% of bleeding episodes, and 93.6% of bleeds were controlled with one infusion.

Once the group was switched to 7-day prophylaxis, the median annualized spontaneous bleeding rate dropped to 0.0 and all target joints resolved.(P less than .0001). No patient developed an inhibitor, and no safety concerns were identified.

The annualized bleeding rate decreased slightly in group 2 patients during on-demand treatment with rIX-FP, compared with the rate in the 12-month period before they entered the study. The researchers speculated that on-demand treatment with rIX-FP “might provide, to a certain extent, some protection against a subsequent bleeding episode. Therefore, patients with a severe bleeding phenotype treated on-demand might experience fewer bleeding episodes if switched to rIX-FP. Furthermore, such on-demand patients who require more than one infusion per month may have the benefit of a reduction of ABR by administering a similar number of infusions according to a 14-day prophylaxis regimen with rIX-FP.”

The sample size was small, however, and differences of care in the clinical study could have affected the results.

Compared to other FIX products, rIX-FP had an extended terminal half-life of 102 hours, 4.3-fold longer than seen with the patients’ previous FIX treatment. Other pharmacokinetic measures such as area under the curve (7176 h × IU/dL), clearance (0.77 mL/h per kg), and incremental recovery (1.27 IU/dL per IU/kg) also were improved. Patients maintained a mean trough of 20 and 12 IU/dL FIX activity on prophylaxis with rIX-FP 40 IU/kg every 7 days and 75 IU/kg every 14 days, respectively. Rather than half-life alone, a slower clearance may be a factor in the success of prophylaxis regimens, the researchers said.

The principal investigators received research support from CSL Behring, which sponsored the study and was responsible for trial operations and data analysis.

[email protected]

On Twitter @maryjodales

Recombinant fusion protein linking coagulation factor IX with albumin (rIX-FP) could result in a “paradigm shift” in prophylaxis regimens for patients with hemophilia B, according to researchers reporting results from a phase III trial.

At dosing intervals of up to 14 days, rIX-FP was a safe and effective factor IX (FIX) replacement product for preventing and treating bleeding episodes in an open-label study of 63 previously treated adolescents and adults with severe hemophilia B.

Compared to standard FIX products, rIX-FP is more active, has a longer half-life, and has better clearance. A study is now underway to see whether a 21-day prophylaxis regimen provides even better results than the 14-day regimen, reported Dr. Elena Santagostino of Istituto di Ricovero e Cura a Carattere Scientifico Ca’ Granda Foundation, Maggiore Hospital Policlinico, Milan, and her associates in the PROLONG-9FP Investigators Study Group.

For prophylaxis, standard FIX products are administered two times per week. Patients are at increased risk of bleeding when their FIX activity is low, particularly just before their next scheduled dose. With the prolonged FIX activity of rIX-FP, the dosing is less frequent and that could potentially improve adherence, the researchers wrote (Blood. 2016;127[14]:1761-9).

In addition, rIX-FP was associated with a reduced risk of spontaneous and trauma-related bleeding episodes.

The findings came from a study of patients who had FIX activity levels of 2% or less and were assigned to one of two groups. The first group received routine prophylaxis once every 7 days for 26 weeks; they were then placed on either a 7-, 10-, or 14-day prophylaxis regimen for a mean of 50, 38, or 51 weeks, respectively. The second group received on-demand treatment of bleeding episodes for 26 weeks and were then switched to a 7-day prophylaxis regimen for a mean of 45 weeks. Only patients who were previously receiving on-demand treatment were eligible for group 2 assignment.

Patients self-administered rIX-FP for routine prophylaxis and on-demand treatment of bleeding episodes; all home administrations were recorded in an electronic diary. A second dose of rIX-FP was administered at least 24 hours after the first injection, if needed, to achieve hemostasis. Efficacy and safety assessments were performed at study sites on a monthly basis.

The study design controlled for the variability of bleeding frequency within the hemophilia B patient population, as group 2 patients started rIX-FP treatment on-demand and continued on 7-day prophylaxis. During the on-demand phase, rIX-FP controlled 98.6% of bleeding episodes, and 93.6% of bleeds were controlled with one infusion.

Once the group was switched to 7-day prophylaxis, the median annualized spontaneous bleeding rate dropped to 0.0 and all target joints resolved.(P less than .0001). No patient developed an inhibitor, and no safety concerns were identified.

The annualized bleeding rate decreased slightly in group 2 patients during on-demand treatment with rIX-FP, compared with the rate in the 12-month period before they entered the study. The researchers speculated that on-demand treatment with rIX-FP “might provide, to a certain extent, some protection against a subsequent bleeding episode. Therefore, patients with a severe bleeding phenotype treated on-demand might experience fewer bleeding episodes if switched to rIX-FP. Furthermore, such on-demand patients who require more than one infusion per month may have the benefit of a reduction of ABR by administering a similar number of infusions according to a 14-day prophylaxis regimen with rIX-FP.”

The sample size was small, however, and differences of care in the clinical study could have affected the results.

Compared to other FIX products, rIX-FP had an extended terminal half-life of 102 hours, 4.3-fold longer than seen with the patients’ previous FIX treatment. Other pharmacokinetic measures such as area under the curve (7176 h × IU/dL), clearance (0.77 mL/h per kg), and incremental recovery (1.27 IU/dL per IU/kg) also were improved. Patients maintained a mean trough of 20 and 12 IU/dL FIX activity on prophylaxis with rIX-FP 40 IU/kg every 7 days and 75 IU/kg every 14 days, respectively. Rather than half-life alone, a slower clearance may be a factor in the success of prophylaxis regimens, the researchers said.

The principal investigators received research support from CSL Behring, which sponsored the study and was responsible for trial operations and data analysis.

[email protected]

On Twitter @maryjodales

Children and adolescents with sickle cell anemia still are not being screened for stroke risk using transcranial Doppler, despite clinical guidelines that strongly recommend annual screening and despite these patients’ frequent health care encounters, according to a report published online April 11 in JAMA Pediatrics.

Approximately 10% of children and adolescents with sickle cell anemia experience stroke before the age of 20 years, unless those at high risk are identified and treated preemptively with blood transfusions, which reduces stroke risk by 92%. The National Heart, Lung, and Blood Institute clinical practice guideline on treating sickle cell disease calls for patients aged 2-16 years to undergo transcranial Doppler every year to detect any elevated velocity of cerebral blood flow, which indicates high stroke risk, said Sarah L. Reeves, Ph.D., of the Child Health Evaluation and Research Unit, University of Michigan, Ann Arbor, and her associates.

CDC/Janice Haney Carr

To assess screening rates, the investigators performed a retrospective cross-sectional analysis of administrative claims data for 4,775 affected children and adolescents treated during a 5-year period in Florida, Illinois, Louisiana, Michigan, South Carolina, and Texas. This yielded 10,787 person-years of data.

Overall, screening rates increased somewhat across all six states during the study period – from 22% to 44% – but “even the highest rates we report are suboptimal,” Dr. Reeves and her associates noted (JAMA Ped. 2016 Apr 11. doi: 10.1001/jamapediatrics.2015.4859).

This is especially true given that the average patient had 20.0 disease-related outpatient visits, 2.1 disease-related hospitalizations, 3.7 emergency department visits, and 1 well-child visit each year – numerous missed opportunities when they could have been referred for screening.

One way to improve screening rates would be to integrate transcranial Doppler exams into comprehensive sickle-cell healthcare, rather than requiring separate scheduled appointments at imaging facilities, they added.

This study was funded by the Agency for Healthcare Research and Quality and the Centers for Medicare & Medicaid Services. Dr. Reeves and her associates reported having no relevant financial disclosures.

Children and adolescents with sickle cell anemia still are not being screened for stroke risk using transcranial Doppler, despite clinical guidelines that strongly recommend annual screening and despite these patients’ frequent health care encounters, according to a report published online April 11 in JAMA Pediatrics.

Approximately 10% of children and adolescents with sickle cell anemia experience stroke before the age of 20 years, unless those at high risk are identified and treated preemptively with blood transfusions, which reduces stroke risk by 92%. The National Heart, Lung, and Blood Institute clinical practice guideline on treating sickle cell disease calls for patients aged 2-16 years to undergo transcranial Doppler every year to detect any elevated velocity of cerebral blood flow, which indicates high stroke risk, said Sarah L. Reeves, Ph.D., of the Child Health Evaluation and Research Unit, University of Michigan, Ann Arbor, and her associates.

CDC/Janice Haney Carr

To assess screening rates, the investigators performed a retrospective cross-sectional analysis of administrative claims data for 4,775 affected children and adolescents treated during a 5-year period in Florida, Illinois, Louisiana, Michigan, South Carolina, and Texas. This yielded 10,787 person-years of data.

Overall, screening rates increased somewhat across all six states during the study period – from 22% to 44% – but “even the highest rates we report are suboptimal,” Dr. Reeves and her associates noted (JAMA Ped. 2016 Apr 11. doi: 10.1001/jamapediatrics.2015.4859).

This is especially true given that the average patient had 20.0 disease-related outpatient visits, 2.1 disease-related hospitalizations, 3.7 emergency department visits, and 1 well-child visit each year – numerous missed opportunities when they could have been referred for screening.

One way to improve screening rates would be to integrate transcranial Doppler exams into comprehensive sickle-cell healthcare, rather than requiring separate scheduled appointments at imaging facilities, they added.

This study was funded by the Agency for Healthcare Research and Quality and the Centers for Medicare & Medicaid Services. Dr. Reeves and her associates reported having no relevant financial disclosures.

Children and adolescents with sickle cell anemia still are not being screened for stroke risk using transcranial Doppler, despite clinical guidelines that strongly recommend annual screening and despite these patients’ frequent health care encounters, according to a report published online April 11 in JAMA Pediatrics.

Approximately 10% of children and adolescents with sickle cell anemia experience stroke before the age of 20 years, unless those at high risk are identified and treated preemptively with blood transfusions, which reduces stroke risk by 92%. The National Heart, Lung, and Blood Institute clinical practice guideline on treating sickle cell disease calls for patients aged 2-16 years to undergo transcranial Doppler every year to detect any elevated velocity of cerebral blood flow, which indicates high stroke risk, said Sarah L. Reeves, Ph.D., of the Child Health Evaluation and Research Unit, University of Michigan, Ann Arbor, and her associates.

CDC/Janice Haney Carr

To assess screening rates, the investigators performed a retrospective cross-sectional analysis of administrative claims data for 4,775 affected children and adolescents treated during a 5-year period in Florida, Illinois, Louisiana, Michigan, South Carolina, and Texas. This yielded 10,787 person-years of data.

Overall, screening rates increased somewhat across all six states during the study period – from 22% to 44% – but “even the highest rates we report are suboptimal,” Dr. Reeves and her associates noted (JAMA Ped. 2016 Apr 11. doi: 10.1001/jamapediatrics.2015.4859).

This is especially true given that the average patient had 20.0 disease-related outpatient visits, 2.1 disease-related hospitalizations, 3.7 emergency department visits, and 1 well-child visit each year – numerous missed opportunities when they could have been referred for screening.

One way to improve screening rates would be to integrate transcranial Doppler exams into comprehensive sickle-cell healthcare, rather than requiring separate scheduled appointments at imaging facilities, they added.

This study was funded by the Agency for Healthcare Research and Quality and the Centers for Medicare & Medicaid Services. Dr. Reeves and her associates reported having no relevant financial disclosures.

AMSTERDAM – Five people with confirmed Zika virus infections have died in Colombia, and all had medical comorbidities, including leukemia, diabetes, sickle cell anemia, and hypertension.

All of the deaths occurred last October in northern and central Colombia, Dr. Alfonso Rodriguez-Morales said at the European Society of Clinical Microbiology and Infectious Diseases annual congress.

Four of the cases were simultaneously published April 7 in the Lancet Infectious Diseases (2016 Apr 7. doi: 10.1016/S1473-3099[16]30006-8). The fifth case occurred in northern Colombia, and was reported in Emerging Infectious Diseases (2016 May. doi: 10.3201/eid2205.151934).

Reports of confirmed Zika-related deaths are rare. Brazil, the only other country to disclose them, has now reported three, said Dr. Rodriguez-Morales of the Universidad Tecnológica de Pereira, Colombia.

©bakhtiar_zein/Thinkstock

“Before the current outbreak in Latin America, Zika virus was not linked to deaths,” he noted. But the eight confirmed Zika-related deaths in South America “call attention to the need for evidence-based guidelines for clinical management of Zika, as well as the possible occurrence of atypical and severe cases, including possibly congenitally related microcephaly.”

Because they all occurred in medically compromised patients, Dr. Rodriguez-Morales also urged clinicians to cast a wary eye on such patients who present with arbovirus-type symptoms, including fever and rash.

From September 2015 to March 2016, Colombia had 58,838 reported cases of Zika. Of those, only 2,361 were lab confirmed. The rest were either diagnosed clinically or were suspected cases, Dr. Rodriguez-Morales said. Although Colombia has a much smaller population than Brazil (49 million vs. 210 million), its Zika case rate is much higher, 120 cases per 100,000 people vs. 34 cases per 100,000 people.

The group of four deaths occurred in central Colombia, and included a 2-year-old girl, a 30-year-old woman, a 61-year-old man, and a 72-year-old woman. All presented with 2-6 days of fever. All were initially suspected to have dengue fever or chikungunya. None tested positive for dengue, but the man was coinfected with chikungunya.

All patients presented with anemia. All but the older man also had severe thrombocytopenia.

The toddler presented with hepatomegaly, mucosal hemorrhage, progressive respiratory collapse, progressive thrombocytopenia, and intravascular coagulation. She died 5 days after symptom onset and was found to have had unrecognized lymphoblastic leukemia.

The 30-year-old woman presented with a severe rash on both arms. She also exhibited coagulation dysfunction, including severe thrombocytopenia and leukopenia that progressed to intracerebral and subarachnoid hemorrhage. She died 12 days after symptom onset. She was determined to have had unrecognized acute myeloid leukemia.

The elderly man had a history of medically controlled hypertension. He experienced mucosal hemorrhage and respiratory distress. He died 7 days after symptom onset. On autopsy, his liver showed necrotic areas, and his spleen indicated a systemic inflammatory response.

The elderly woman had a history of insulin-controlled type 2 diabetes. Her symptoms included gastrointestinal distress, thrombocytopenia, and acute respiratory failure. She died 48 hours after symptom onset; her brain showed edema and ischemic lesions.

The 15-year-old girl in northern Colombia had a 5-year history of sickle cell disease, which, Dr. Rodriguez-Morales pointed out, is a risk factor for arbovirus diseases. However, the patient had never been hospitalized for a vasoocclusive crisis. She presented with a high fever; joint, muscle, and abdominal pain; and jaundice. She was assumed to have dengue virus. Within another day, she had progressed into respiratory failure and was on a ventilator. She died less than 2 days later.

Her autopsy showed hepatic necrosis and severe decrease of splenic lymphoid tissue with splenic sequestration. Systemic inflammation probably triggered a fatal vasoocclusive crisis and splenic sequestration.

Dr. Rodriguez-Morales had no financial disclosures.

[email protected]

AMSTERDAM – Five people with confirmed Zika virus infections have died in Colombia, and all had medical comorbidities, including leukemia, diabetes, sickle cell anemia, and hypertension.

All of the deaths occurred last October in northern and central Colombia, Dr. Alfonso Rodriguez-Morales said at the European Society of Clinical Microbiology and Infectious Diseases annual congress.

Four of the cases were simultaneously published April 7 in the Lancet Infectious Diseases (2016 Apr 7. doi: 10.1016/S1473-3099[16]30006-8). The fifth case occurred in northern Colombia, and was reported in Emerging Infectious Diseases (2016 May. doi: 10.3201/eid2205.151934).

Reports of confirmed Zika-related deaths are rare. Brazil, the only other country to disclose them, has now reported three, said Dr. Rodriguez-Morales of the Universidad Tecnológica de Pereira, Colombia.

©bakhtiar_zein/Thinkstock

“Before the current outbreak in Latin America, Zika virus was not linked to deaths,” he noted. But the eight confirmed Zika-related deaths in South America “call attention to the need for evidence-based guidelines for clinical management of Zika, as well as the possible occurrence of atypical and severe cases, including possibly congenitally related microcephaly.”

Because they all occurred in medically compromised patients, Dr. Rodriguez-Morales also urged clinicians to cast a wary eye on such patients who present with arbovirus-type symptoms, including fever and rash.

From September 2015 to March 2016, Colombia had 58,838 reported cases of Zika. Of those, only 2,361 were lab confirmed. The rest were either diagnosed clinically or were suspected cases, Dr. Rodriguez-Morales said. Although Colombia has a much smaller population than Brazil (49 million vs. 210 million), its Zika case rate is much higher, 120 cases per 100,000 people vs. 34 cases per 100,000 people.

The group of four deaths occurred in central Colombia, and included a 2-year-old girl, a 30-year-old woman, a 61-year-old man, and a 72-year-old woman. All presented with 2-6 days of fever. All were initially suspected to have dengue fever or chikungunya. None tested positive for dengue, but the man was coinfected with chikungunya.

All patients presented with anemia. All but the older man also had severe thrombocytopenia.

The toddler presented with hepatomegaly, mucosal hemorrhage, progressive respiratory collapse, progressive thrombocytopenia, and intravascular coagulation. She died 5 days after symptom onset and was found to have had unrecognized lymphoblastic leukemia.

The 30-year-old woman presented with a severe rash on both arms. She also exhibited coagulation dysfunction, including severe thrombocytopenia and leukopenia that progressed to intracerebral and subarachnoid hemorrhage. She died 12 days after symptom onset. She was determined to have had unrecognized acute myeloid leukemia.

The elderly man had a history of medically controlled hypertension. He experienced mucosal hemorrhage and respiratory distress. He died 7 days after symptom onset. On autopsy, his liver showed necrotic areas, and his spleen indicated a systemic inflammatory response.

The elderly woman had a history of insulin-controlled type 2 diabetes. Her symptoms included gastrointestinal distress, thrombocytopenia, and acute respiratory failure. She died 48 hours after symptom onset; her brain showed edema and ischemic lesions.

The 15-year-old girl in northern Colombia had a 5-year history of sickle cell disease, which, Dr. Rodriguez-Morales pointed out, is a risk factor for arbovirus diseases. However, the patient had never been hospitalized for a vasoocclusive crisis. She presented with a high fever; joint, muscle, and abdominal pain; and jaundice. She was assumed to have dengue virus. Within another day, she had progressed into respiratory failure and was on a ventilator. She died less than 2 days later.

Her autopsy showed hepatic necrosis and severe decrease of splenic lymphoid tissue with splenic sequestration. Systemic inflammation probably triggered a fatal vasoocclusive crisis and splenic sequestration.

Dr. Rodriguez-Morales had no financial disclosures.

[email protected]

AMSTERDAM – Five people with confirmed Zika virus infections have died in Colombia, and all had medical comorbidities, including leukemia, diabetes, sickle cell anemia, and hypertension.

All of the deaths occurred last October in northern and central Colombia, Dr. Alfonso Rodriguez-Morales said at the European Society of Clinical Microbiology and Infectious Diseases annual congress.

Four of the cases were simultaneously published April 7 in the Lancet Infectious Diseases (2016 Apr 7. doi: 10.1016/S1473-3099[16]30006-8). The fifth case occurred in northern Colombia, and was reported in Emerging Infectious Diseases (2016 May. doi: 10.3201/eid2205.151934).

Reports of confirmed Zika-related deaths are rare. Brazil, the only other country to disclose them, has now reported three, said Dr. Rodriguez-Morales of the Universidad Tecnológica de Pereira, Colombia.

©bakhtiar_zein/Thinkstock

“Before the current outbreak in Latin America, Zika virus was not linked to deaths,” he noted. But the eight confirmed Zika-related deaths in South America “call attention to the need for evidence-based guidelines for clinical management of Zika, as well as the possible occurrence of atypical and severe cases, including possibly congenitally related microcephaly.”

Because they all occurred in medically compromised patients, Dr. Rodriguez-Morales also urged clinicians to cast a wary eye on such patients who present with arbovirus-type symptoms, including fever and rash.

From September 2015 to March 2016, Colombia had 58,838 reported cases of Zika. Of those, only 2,361 were lab confirmed. The rest were either diagnosed clinically or were suspected cases, Dr. Rodriguez-Morales said. Although Colombia has a much smaller population than Brazil (49 million vs. 210 million), its Zika case rate is much higher, 120 cases per 100,000 people vs. 34 cases per 100,000 people.

The group of four deaths occurred in central Colombia, and included a 2-year-old girl, a 30-year-old woman, a 61-year-old man, and a 72-year-old woman. All presented with 2-6 days of fever. All were initially suspected to have dengue fever or chikungunya. None tested positive for dengue, but the man was coinfected with chikungunya.

All patients presented with anemia. All but the older man also had severe thrombocytopenia.

The toddler presented with hepatomegaly, mucosal hemorrhage, progressive respiratory collapse, progressive thrombocytopenia, and intravascular coagulation. She died 5 days after symptom onset and was found to have had unrecognized lymphoblastic leukemia.

The 30-year-old woman presented with a severe rash on both arms. She also exhibited coagulation dysfunction, including severe thrombocytopenia and leukopenia that progressed to intracerebral and subarachnoid hemorrhage. She died 12 days after symptom onset. She was determined to have had unrecognized acute myeloid leukemia.

The elderly man had a history of medically controlled hypertension. He experienced mucosal hemorrhage and respiratory distress. He died 7 days after symptom onset. On autopsy, his liver showed necrotic areas, and his spleen indicated a systemic inflammatory response.

The elderly woman had a history of insulin-controlled type 2 diabetes. Her symptoms included gastrointestinal distress, thrombocytopenia, and acute respiratory failure. She died 48 hours after symptom onset; her brain showed edema and ischemic lesions.

The 15-year-old girl in northern Colombia had a 5-year history of sickle cell disease, which, Dr. Rodriguez-Morales pointed out, is a risk factor for arbovirus diseases. However, the patient had never been hospitalized for a vasoocclusive crisis. She presented with a high fever; joint, muscle, and abdominal pain; and jaundice. She was assumed to have dengue virus. Within another day, she had progressed into respiratory failure and was on a ventilator. She died less than 2 days later.

Her autopsy showed hepatic necrosis and severe decrease of splenic lymphoid tissue with splenic sequestration. Systemic inflammation probably triggered a fatal vasoocclusive crisis and splenic sequestration.

Dr. Rodriguez-Morales had no financial disclosures.

[email protected]

The bispecific factor VIII–mimetic antibody ACE910 has a longer half-life than current hemophilia A treatments, potentially offering a more convenient once-weekly, subcutaneous injection, based on a study published in Blood.

In a phase I study, ACE910 was well tolerated at doses up to 1 mg/kg, with an average half life of 28 to 34 days. Based on tests in FVIII-depleted plasma, ACE910 shortened activated partial thromboplastin time (APTT) and increased peak height of thrombin generation, and exhibited a long-lasting response throughout the 24-week study period. ACE910 at 1 mg/kg resulted in APTT similar to that seen in normal plasma, although the peak height of thrombin generation did not reach normal levels.

Crystal/Wikimedia Commons/Creative Commons Attribution 2.0

The findings suggest “that ACE910 has the potential to reduce bleeding frequency in patients with severe hemophilia A to that of patients with mild hemophilia A, even at less frequent dosing, compared with existing FVIII and bypassing drugs. Furthermore, ACE910 may change the treatment paradigm from the current approach of maintaining trough levels of FVIII:C greater than 1% to a new approach of maintaining a constant hemostatic activity corresponding to a mild hemophilia A level,” wrote Dr. Naoki Uchida of Showa University Clinical Research Institute for Clinical Pharmacology and Therapeutics, Tokyo, and colleagues (Blood. 2016 Apr 7. doi: 10.1182/blood-2015-06-650226).

Adverse events were comparable with those of placebo; 13 of 48 subjects who received ACE910 reported 15 adverse events, compared with 6 adverse events reported by 4 of 16 subjects who received placebo. Except for moderate nasopharyngitis reported in one subject, all adverse events were mild, were not dose dependent, and were similar for Japanese and white subjects. Clinical and laboratory findings showed normal coagulability with ACE910 administered at any dose.

An anti-drug antibody response was observed in 2 of 48 patients (1 Japanese, 1 white) both at 0.1 mg/kg ACE910. The anti-drug antibody responses were not IgE mediated, and no allergic symptoms were observed.

The bispecific factor VIII–mimetic antibody ACE910 has a longer half-life than current hemophilia A treatments, potentially offering a more convenient once-weekly, subcutaneous injection, based on a study published in Blood.

In a phase I study, ACE910 was well tolerated at doses up to 1 mg/kg, with an average half life of 28 to 34 days. Based on tests in FVIII-depleted plasma, ACE910 shortened activated partial thromboplastin time (APTT) and increased peak height of thrombin generation, and exhibited a long-lasting response throughout the 24-week study period. ACE910 at 1 mg/kg resulted in APTT similar to that seen in normal plasma, although the peak height of thrombin generation did not reach normal levels.

Crystal/Wikimedia Commons/Creative Commons Attribution 2.0

The findings suggest “that ACE910 has the potential to reduce bleeding frequency in patients with severe hemophilia A to that of patients with mild hemophilia A, even at less frequent dosing, compared with existing FVIII and bypassing drugs. Furthermore, ACE910 may change the treatment paradigm from the current approach of maintaining trough levels of FVIII:C greater than 1% to a new approach of maintaining a constant hemostatic activity corresponding to a mild hemophilia A level,” wrote Dr. Naoki Uchida of Showa University Clinical Research Institute for Clinical Pharmacology and Therapeutics, Tokyo, and colleagues (Blood. 2016 Apr 7. doi: 10.1182/blood-2015-06-650226).

Adverse events were comparable with those of placebo; 13 of 48 subjects who received ACE910 reported 15 adverse events, compared with 6 adverse events reported by 4 of 16 subjects who received placebo. Except for moderate nasopharyngitis reported in one subject, all adverse events were mild, were not dose dependent, and were similar for Japanese and white subjects. Clinical and laboratory findings showed normal coagulability with ACE910 administered at any dose.

An anti-drug antibody response was observed in 2 of 48 patients (1 Japanese, 1 white) both at 0.1 mg/kg ACE910. The anti-drug antibody responses were not IgE mediated, and no allergic symptoms were observed.

The bispecific factor VIII–mimetic antibody ACE910 has a longer half-life than current hemophilia A treatments, potentially offering a more convenient once-weekly, subcutaneous injection, based on a study published in Blood.

In a phase I study, ACE910 was well tolerated at doses up to 1 mg/kg, with an average half life of 28 to 34 days. Based on tests in FVIII-depleted plasma, ACE910 shortened activated partial thromboplastin time (APTT) and increased peak height of thrombin generation, and exhibited a long-lasting response throughout the 24-week study period. ACE910 at 1 mg/kg resulted in APTT similar to that seen in normal plasma, although the peak height of thrombin generation did not reach normal levels.

Crystal/Wikimedia Commons/Creative Commons Attribution 2.0

The findings suggest “that ACE910 has the potential to reduce bleeding frequency in patients with severe hemophilia A to that of patients with mild hemophilia A, even at less frequent dosing, compared with existing FVIII and bypassing drugs. Furthermore, ACE910 may change the treatment paradigm from the current approach of maintaining trough levels of FVIII:C greater than 1% to a new approach of maintaining a constant hemostatic activity corresponding to a mild hemophilia A level,” wrote Dr. Naoki Uchida of Showa University Clinical Research Institute for Clinical Pharmacology and Therapeutics, Tokyo, and colleagues (Blood. 2016 Apr 7. doi: 10.1182/blood-2015-06-650226).

Adverse events were comparable with those of placebo; 13 of 48 subjects who received ACE910 reported 15 adverse events, compared with 6 adverse events reported by 4 of 16 subjects who received placebo. Except for moderate nasopharyngitis reported in one subject, all adverse events were mild, were not dose dependent, and were similar for Japanese and white subjects. Clinical and laboratory findings showed normal coagulability with ACE910 administered at any dose.

An anti-drug antibody response was observed in 2 of 48 patients (1 Japanese, 1 white) both at 0.1 mg/kg ACE910. The anti-drug antibody responses were not IgE mediated, and no allergic symptoms were observed.