HT Staff

Image by Andre E.X. Brown

The US Food and Drug Administration (FDA) has accepted for priority review a supplemental new drug application (sNDA) for rivaroxaban (XARELTO®).

The sNDA is for a 10 mg once-daily dose of rivaroxaban to reduce the risk of venous thromboembolism (VTE) in patients who have received at least 6 months of standard anticoagulant therapy.

The FDA grants priority review to applications for products that may provide significant improvements in the treatment, diagnosis, or prevention of serious conditions.

The agency’s goal is to take action on a priority review application within 6 months of receiving it, rather than the standard 10 months.

The FDA plans to make a decision on the rivaroxaban sNDA by October 28, 2017.

The sNDA is supported by data from the EINSTEIN CHOICE study. Patients enrolled in this study had confirmed VTE and were treated initially with standard anticoagulant therapy for 6 to 12 months.

During EINSTEIN CHOICE, 3365 patients received rivaroxaban at 10 mg, rivaroxaban at 20 mg, or aspirin at 100 mg once daily for up to 12 months of extended treatment.

Both rivaroxaban doses were superior to aspirin in preventing fatal or non-fatal recurrent VTE, the study’s primary efficacy endpoint.

The rate of recurrent VTE was 1.2% in the 10 mg rivaroxaban arm (hazard ratio [HR]=0.26; 95% CI, 0.14 to 0.47; P<0.001), 1.5% in the 20 mg rivaroxaban arm (HR=0.34; 95% CI, 0.20 to 0.59; P<0.001), and 4.4% in the aspirin arm. Fatal VTE occurred in 0%, 0.2%, and 0.2% of patients, respectively.

The primary safety endpoint was major bleeding as defined by the International Society on Thrombosis and Haemostasis.

The rate of major bleeding was 0.4% for the 10 mg rivaroxaban group (HR=1.64; 95% CI, 0.39 to 6.84; P=0.50), 0.5% for the 20 mg rivaroxaban group (HR=2.01; 95% CI, 0.50 to 8.04; P=0.32), and 0.3% for the aspirin group.

Image by Andre E.X. Brown

The US Food and Drug Administration (FDA) has accepted for priority review a supplemental new drug application (sNDA) for rivaroxaban (XARELTO®).

The sNDA is for a 10 mg once-daily dose of rivaroxaban to reduce the risk of venous thromboembolism (VTE) in patients who have received at least 6 months of standard anticoagulant therapy.

The FDA grants priority review to applications for products that may provide significant improvements in the treatment, diagnosis, or prevention of serious conditions.

The agency’s goal is to take action on a priority review application within 6 months of receiving it, rather than the standard 10 months.

The FDA plans to make a decision on the rivaroxaban sNDA by October 28, 2017.

The sNDA is supported by data from the EINSTEIN CHOICE study. Patients enrolled in this study had confirmed VTE and were treated initially with standard anticoagulant therapy for 6 to 12 months.

During EINSTEIN CHOICE, 3365 patients received rivaroxaban at 10 mg, rivaroxaban at 20 mg, or aspirin at 100 mg once daily for up to 12 months of extended treatment.

Both rivaroxaban doses were superior to aspirin in preventing fatal or non-fatal recurrent VTE, the study’s primary efficacy endpoint.

The rate of recurrent VTE was 1.2% in the 10 mg rivaroxaban arm (hazard ratio [HR]=0.26; 95% CI, 0.14 to 0.47; P<0.001), 1.5% in the 20 mg rivaroxaban arm (HR=0.34; 95% CI, 0.20 to 0.59; P<0.001), and 4.4% in the aspirin arm. Fatal VTE occurred in 0%, 0.2%, and 0.2% of patients, respectively.

The primary safety endpoint was major bleeding as defined by the International Society on Thrombosis and Haemostasis.

The rate of major bleeding was 0.4% for the 10 mg rivaroxaban group (HR=1.64; 95% CI, 0.39 to 6.84; P=0.50), 0.5% for the 20 mg rivaroxaban group (HR=2.01; 95% CI, 0.50 to 8.04; P=0.32), and 0.3% for the aspirin group.

Image by Andre E.X. Brown

The US Food and Drug Administration (FDA) has accepted for priority review a supplemental new drug application (sNDA) for rivaroxaban (XARELTO®).

The sNDA is for a 10 mg once-daily dose of rivaroxaban to reduce the risk of venous thromboembolism (VTE) in patients who have received at least 6 months of standard anticoagulant therapy.

The FDA grants priority review to applications for products that may provide significant improvements in the treatment, diagnosis, or prevention of serious conditions.

The agency’s goal is to take action on a priority review application within 6 months of receiving it, rather than the standard 10 months.

The FDA plans to make a decision on the rivaroxaban sNDA by October 28, 2017.

The sNDA is supported by data from the EINSTEIN CHOICE study. Patients enrolled in this study had confirmed VTE and were treated initially with standard anticoagulant therapy for 6 to 12 months.

During EINSTEIN CHOICE, 3365 patients received rivaroxaban at 10 mg, rivaroxaban at 20 mg, or aspirin at 100 mg once daily for up to 12 months of extended treatment.

Both rivaroxaban doses were superior to aspirin in preventing fatal or non-fatal recurrent VTE, the study’s primary efficacy endpoint.

The rate of recurrent VTE was 1.2% in the 10 mg rivaroxaban arm (hazard ratio [HR]=0.26; 95% CI, 0.14 to 0.47; P<0.001), 1.5% in the 20 mg rivaroxaban arm (HR=0.34; 95% CI, 0.20 to 0.59; P<0.001), and 4.4% in the aspirin arm. Fatal VTE occurred in 0%, 0.2%, and 0.2% of patients, respectively.

The primary safety endpoint was major bleeding as defined by the International Society on Thrombosis and Haemostasis.

The rate of major bleeding was 0.4% for the 10 mg rivaroxaban group (HR=1.64; 95% CI, 0.39 to 6.84; P=0.50), 0.5% for the 20 mg rivaroxaban group (HR=2.01; 95% CI, 0.50 to 8.04; P=0.32), and 0.3% for the aspirin group.

Photo courtesy of Columbia University

A small retrospective study of survivors of childhood acute lymphoblastic leukemia (ALL) or non-Hodgkin lymphoma (NHL) has found that phosphorylated Tau (p-Tau) in patients’ cerebrospinal fluid (CSF) is a predictor of late neurocognitive consequences.

Investigators compared intellectual performance, memory, and executive functioning between survivors and control subjects and observed that CSF levels of p-Tau during treatment and total intrathecal methotrexate dose negatively correlated with intellectual performance.

They suggest that identifying at-risk children early “could inspire interventions to prevent or remediate chemotherapy-induced cognitive sequelae.”

The investigators enrolled 31 nonirradiated adults, 27 who had had ALL and 4 NHL. They compared the survivors to 35 age-matched controls.

All study participants were a mean age of 21.5 years (range, 16.1–29.8). The mean age of the survivors at diagnosis was 6.4 years.

"Our team collected samples of brain fluid during the cancer treatment,” Rudi D’Hooge, PhD, of KU Leuven in Belgium, said. “We analyzed the p-Tau levels to measure the damage to the brain cells."

Investigators assessed intelligence, memory, and executive function using Wechsler Adult Intelligence Scale (WAIS IV), Rey Auditory Verbal Learning Test (AVLT), and Amsterdam Neuropsychological Tasks (ANT), respectively.

Statistical analysis included two-sided, one-way analysis of covariance (ANCOVA) with survivor group vs control group as an independent factor.  Parental socioeconomic status was a covariate.

Dr D’Hooge and colleagues published their findings in JNCI, the Journal of the National Cancer Institute.

Findings

Investigators found that survivors had statistically significant lower total intelligence (P=0.001), verbal intelligence (P=0.02), and performance intelligence (P=0.007) quotients than controls.

They also found a negative correlation between CSF p-Tau, but not CSF Tau, levels and total intelligence (P=0.02), verbal intelligence (P=0.001), and performance intelligence (P=0.04) quotients.

Only performance intelligence was negatively correlated with total intrathecal methotrexate (P=0.007).

And because total intrathecal methotrexate dose and CSF p-Tau were not significantly correlated (P=0.29), the investigators believe intervening factors increase CSF p-Tau independently from methotrexate dose.

Results of subset tests revealed that cognitive flexibility (set-shifting and working memory), and processing speed were affected (P<0.05).

However, long-term memory, focused and sustained attention, and inhibition appeared unaffected (P>0.05).

The investigators believe these differences in vulnerability of cognitive functions parallel patient age at time of development.

For example, long-term memory, focused and sustained attention, and inhibition develop before children reach 6 years, the mean age at which the survivor cohort was diagnosed.

But set-shifting, working memory, and processing speed mature during adolescence, after the patients were diagnosed and treated.

Limitations of the study, according to the investigators, include its retrospective and cross-sectional design, the relatively small sample size, and the lack of pretreatment neurocognitive data.

Nevertheless, they believe the study should encourage the use of the CSF biomarker, intrathecal methotrexate dose, and age at therapy initiation in neurotoxicity assessments to identify children at risk for long-term sequelae.

"If we systematically measure these p-Tau levels in the future," Iris Elens, MD, also of KU Leuven, said, "we can offer specific help to children with high values. With early coaching aimed at the most relevant functions we can prevent problems that would otherwise manifest 10 to 15 years after the treatment."

The Olivia Hendrickx Research Fund supported the study. 

Photo courtesy of Columbia University

A small retrospective study of survivors of childhood acute lymphoblastic leukemia (ALL) or non-Hodgkin lymphoma (NHL) has found that phosphorylated Tau (p-Tau) in patients’ cerebrospinal fluid (CSF) is a predictor of late neurocognitive consequences.

Investigators compared intellectual performance, memory, and executive functioning between survivors and control subjects and observed that CSF levels of p-Tau during treatment and total intrathecal methotrexate dose negatively correlated with intellectual performance.

They suggest that identifying at-risk children early “could inspire interventions to prevent or remediate chemotherapy-induced cognitive sequelae.”

The investigators enrolled 31 nonirradiated adults, 27 who had had ALL and 4 NHL. They compared the survivors to 35 age-matched controls.

All study participants were a mean age of 21.5 years (range, 16.1–29.8). The mean age of the survivors at diagnosis was 6.4 years.

"Our team collected samples of brain fluid during the cancer treatment,” Rudi D’Hooge, PhD, of KU Leuven in Belgium, said. “We analyzed the p-Tau levels to measure the damage to the brain cells."

Investigators assessed intelligence, memory, and executive function using Wechsler Adult Intelligence Scale (WAIS IV), Rey Auditory Verbal Learning Test (AVLT), and Amsterdam Neuropsychological Tasks (ANT), respectively.

Statistical analysis included two-sided, one-way analysis of covariance (ANCOVA) with survivor group vs control group as an independent factor.  Parental socioeconomic status was a covariate.

Dr D’Hooge and colleagues published their findings in JNCI, the Journal of the National Cancer Institute.

Findings

Investigators found that survivors had statistically significant lower total intelligence (P=0.001), verbal intelligence (P=0.02), and performance intelligence (P=0.007) quotients than controls.

They also found a negative correlation between CSF p-Tau, but not CSF Tau, levels and total intelligence (P=0.02), verbal intelligence (P=0.001), and performance intelligence (P=0.04) quotients.

Only performance intelligence was negatively correlated with total intrathecal methotrexate (P=0.007).

And because total intrathecal methotrexate dose and CSF p-Tau were not significantly correlated (P=0.29), the investigators believe intervening factors increase CSF p-Tau independently from methotrexate dose.

Results of subset tests revealed that cognitive flexibility (set-shifting and working memory), and processing speed were affected (P<0.05).

However, long-term memory, focused and sustained attention, and inhibition appeared unaffected (P>0.05).

The investigators believe these differences in vulnerability of cognitive functions parallel patient age at time of development.

For example, long-term memory, focused and sustained attention, and inhibition develop before children reach 6 years, the mean age at which the survivor cohort was diagnosed.

But set-shifting, working memory, and processing speed mature during adolescence, after the patients were diagnosed and treated.

Limitations of the study, according to the investigators, include its retrospective and cross-sectional design, the relatively small sample size, and the lack of pretreatment neurocognitive data.

Nevertheless, they believe the study should encourage the use of the CSF biomarker, intrathecal methotrexate dose, and age at therapy initiation in neurotoxicity assessments to identify children at risk for long-term sequelae.

"If we systematically measure these p-Tau levels in the future," Iris Elens, MD, also of KU Leuven, said, "we can offer specific help to children with high values. With early coaching aimed at the most relevant functions we can prevent problems that would otherwise manifest 10 to 15 years after the treatment."

The Olivia Hendrickx Research Fund supported the study. 

Photo courtesy of Columbia University

A small retrospective study of survivors of childhood acute lymphoblastic leukemia (ALL) or non-Hodgkin lymphoma (NHL) has found that phosphorylated Tau (p-Tau) in patients’ cerebrospinal fluid (CSF) is a predictor of late neurocognitive consequences.

Investigators compared intellectual performance, memory, and executive functioning between survivors and control subjects and observed that CSF levels of p-Tau during treatment and total intrathecal methotrexate dose negatively correlated with intellectual performance.

They suggest that identifying at-risk children early “could inspire interventions to prevent or remediate chemotherapy-induced cognitive sequelae.”

The investigators enrolled 31 nonirradiated adults, 27 who had had ALL and 4 NHL. They compared the survivors to 35 age-matched controls.

All study participants were a mean age of 21.5 years (range, 16.1–29.8). The mean age of the survivors at diagnosis was 6.4 years.

"Our team collected samples of brain fluid during the cancer treatment,” Rudi D’Hooge, PhD, of KU Leuven in Belgium, said. “We analyzed the p-Tau levels to measure the damage to the brain cells."

Investigators assessed intelligence, memory, and executive function using Wechsler Adult Intelligence Scale (WAIS IV), Rey Auditory Verbal Learning Test (AVLT), and Amsterdam Neuropsychological Tasks (ANT), respectively.

Statistical analysis included two-sided, one-way analysis of covariance (ANCOVA) with survivor group vs control group as an independent factor.  Parental socioeconomic status was a covariate.

Dr D’Hooge and colleagues published their findings in JNCI, the Journal of the National Cancer Institute.

Findings

Investigators found that survivors had statistically significant lower total intelligence (P=0.001), verbal intelligence (P=0.02), and performance intelligence (P=0.007) quotients than controls.

They also found a negative correlation between CSF p-Tau, but not CSF Tau, levels and total intelligence (P=0.02), verbal intelligence (P=0.001), and performance intelligence (P=0.04) quotients.

Only performance intelligence was negatively correlated with total intrathecal methotrexate (P=0.007).

And because total intrathecal methotrexate dose and CSF p-Tau were not significantly correlated (P=0.29), the investigators believe intervening factors increase CSF p-Tau independently from methotrexate dose.

Results of subset tests revealed that cognitive flexibility (set-shifting and working memory), and processing speed were affected (P<0.05).

However, long-term memory, focused and sustained attention, and inhibition appeared unaffected (P>0.05).

The investigators believe these differences in vulnerability of cognitive functions parallel patient age at time of development.

For example, long-term memory, focused and sustained attention, and inhibition develop before children reach 6 years, the mean age at which the survivor cohort was diagnosed.

But set-shifting, working memory, and processing speed mature during adolescence, after the patients were diagnosed and treated.

Limitations of the study, according to the investigators, include its retrospective and cross-sectional design, the relatively small sample size, and the lack of pretreatment neurocognitive data.

Nevertheless, they believe the study should encourage the use of the CSF biomarker, intrathecal methotrexate dose, and age at therapy initiation in neurotoxicity assessments to identify children at risk for long-term sequelae.

"If we systematically measure these p-Tau levels in the future," Iris Elens, MD, also of KU Leuven, said, "we can offer specific help to children with high values. With early coaching aimed at the most relevant functions we can prevent problems that would otherwise manifest 10 to 15 years after the treatment."

The Olivia Hendrickx Research Fund supported the study. 

Micrograph showing HL

Brentuximab vedotin (Adcetris®) in combination with a 3-drug chemotherapy regimen has met its primary endpoint of statistically significant improvement in modified progression-free survival (mPFS) compared with standard therapy in frontline treatment of advanced stage Hodgkin lymphoma (HL).

The ECHELON-1 trial tested brentuximab vedotin plus Adriamycin, vinblastine, and dacarbazine (AVD) against Adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD) in 1334 patients with previously untreated advanced HL.

Patients treated with brentuximab showed an 82% lower risk of disease progression compared with 77% in the ABVD arm.

Brentuximab vedotin is currently not approved as a frontline therapy for HL.

“Notably, this is the first clinical trial in frontline advanced Hodgkin lymphoma to show superior efficacy of a regimen that eliminates bleomycin,” said Clay Siegall, PhD, president and CEO of Seattle Genetics.

Dirk Huebner, MD, executive medical director of oncology at Takeda Pharmaceutical Company, said the results of the trial “have the potential to change the treatment approach of frontline advanced Hodgkin lymphoma.”

Seattle Genetics and Takeda are jointly developing brentuximab vedotin. Seattle Genetics has US and Canadian commercialization rights and Takeda has rights to commercialize it in the rest of the world.

Brentuximab vedotin is an antibody-drug conjugate (ADC) made up of an anti-CD30 monoclonal antibody attached by a linker to monomethyl auristatin E (MMAE). The linker system is stable in the bloodstream but releases MMAE when internalized into CD30-expressing tumor cells.

ECHELON-1

ECHELON-1 (NCT01712490) is a randomized, 2-arm, multicenter phase 3 trial comparing brentuximab vedotin plus AVD to ABVD as frontline therapy in treatment-naïve advanced HL.

The trial enrolled 1334 patients with histologically confirmed advanced HL.

The primary endpoint is mPFS by independent review facility.

The investigators, regulatory bodies, and trial sponsors defined mPFS as the time to progression, death, or receipt of additional anticancer therapy for patients who were not in complete response (CR) after completion of frontline therapy.

They chose mPFS instead of PFS because they say it provides a clearer picture of the efficacy of primary anticancer therapy by eliminating the confounding effects of additional anticancer therapy.

Secondary endpoints include overall survival (OS), CR, and safety.

The results demonstrated that combination treatment with brentuximab resulted in a statistically significant improvement in mPFS versus the control arm (hazard ratio=0.770; P=0.035).

Interim analysis of OS, the key secondary endpoint, also trended in favor of the brentuximab plus AVD arm.

The safety profile of the brentuximab combination was consistent with that of the single-agent components of the regimen.

Patients in the brentuximab arm experienced an increased incidence of febrile neutropenia and peripheral neuropathy compared to the ABVD arm.

Febrile neutropenia was reduced with the use of prophylactic growth factors.

Peripheral neuropathy was managed through dose modifications.

Patients treated with ABVD had an increased rate and severity of pulmonary toxicity.

The companies plan to submit an abstract for presentation at the American Society of Hematology annual meeting in December.

Brentuximab is currently approved by the US Food and Drug Administration (FDA) for the treatment of patients with classical HL who have received a prior stem cell transplant or 2 prior chemotherapy treatments.

Brentuximab is also approved to treat patient with anaplastic large cell lymphoma who have failed one prior treatment.

For more on brentuximab vedotin, see the full prescribing informtion. 

Micrograph showing HL

Brentuximab vedotin (Adcetris®) in combination with a 3-drug chemotherapy regimen has met its primary endpoint of statistically significant improvement in modified progression-free survival (mPFS) compared with standard therapy in frontline treatment of advanced stage Hodgkin lymphoma (HL).

The ECHELON-1 trial tested brentuximab vedotin plus Adriamycin, vinblastine, and dacarbazine (AVD) against Adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD) in 1334 patients with previously untreated advanced HL.

Patients treated with brentuximab showed an 82% lower risk of disease progression compared with 77% in the ABVD arm.

Brentuximab vedotin is currently not approved as a frontline therapy for HL.

“Notably, this is the first clinical trial in frontline advanced Hodgkin lymphoma to show superior efficacy of a regimen that eliminates bleomycin,” said Clay Siegall, PhD, president and CEO of Seattle Genetics.

Dirk Huebner, MD, executive medical director of oncology at Takeda Pharmaceutical Company, said the results of the trial “have the potential to change the treatment approach of frontline advanced Hodgkin lymphoma.”

Seattle Genetics and Takeda are jointly developing brentuximab vedotin. Seattle Genetics has US and Canadian commercialization rights and Takeda has rights to commercialize it in the rest of the world.

Brentuximab vedotin is an antibody-drug conjugate (ADC) made up of an anti-CD30 monoclonal antibody attached by a linker to monomethyl auristatin E (MMAE). The linker system is stable in the bloodstream but releases MMAE when internalized into CD30-expressing tumor cells.

ECHELON-1

ECHELON-1 (NCT01712490) is a randomized, 2-arm, multicenter phase 3 trial comparing brentuximab vedotin plus AVD to ABVD as frontline therapy in treatment-naïve advanced HL.

The trial enrolled 1334 patients with histologically confirmed advanced HL.

The primary endpoint is mPFS by independent review facility.

The investigators, regulatory bodies, and trial sponsors defined mPFS as the time to progression, death, or receipt of additional anticancer therapy for patients who were not in complete response (CR) after completion of frontline therapy.

They chose mPFS instead of PFS because they say it provides a clearer picture of the efficacy of primary anticancer therapy by eliminating the confounding effects of additional anticancer therapy.

Secondary endpoints include overall survival (OS), CR, and safety.

The results demonstrated that combination treatment with brentuximab resulted in a statistically significant improvement in mPFS versus the control arm (hazard ratio=0.770; P=0.035).

Interim analysis of OS, the key secondary endpoint, also trended in favor of the brentuximab plus AVD arm.

The safety profile of the brentuximab combination was consistent with that of the single-agent components of the regimen.

Patients in the brentuximab arm experienced an increased incidence of febrile neutropenia and peripheral neuropathy compared to the ABVD arm.

Febrile neutropenia was reduced with the use of prophylactic growth factors.

Peripheral neuropathy was managed through dose modifications.

Patients treated with ABVD had an increased rate and severity of pulmonary toxicity.

The companies plan to submit an abstract for presentation at the American Society of Hematology annual meeting in December.

Brentuximab is currently approved by the US Food and Drug Administration (FDA) for the treatment of patients with classical HL who have received a prior stem cell transplant or 2 prior chemotherapy treatments.

Brentuximab is also approved to treat patient with anaplastic large cell lymphoma who have failed one prior treatment.

For more on brentuximab vedotin, see the full prescribing informtion. 

Micrograph showing HL

Brentuximab vedotin (Adcetris®) in combination with a 3-drug chemotherapy regimen has met its primary endpoint of statistically significant improvement in modified progression-free survival (mPFS) compared with standard therapy in frontline treatment of advanced stage Hodgkin lymphoma (HL).

The ECHELON-1 trial tested brentuximab vedotin plus Adriamycin, vinblastine, and dacarbazine (AVD) against Adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD) in 1334 patients with previously untreated advanced HL.

Patients treated with brentuximab showed an 82% lower risk of disease progression compared with 77% in the ABVD arm.

Brentuximab vedotin is currently not approved as a frontline therapy for HL.

“Notably, this is the first clinical trial in frontline advanced Hodgkin lymphoma to show superior efficacy of a regimen that eliminates bleomycin,” said Clay Siegall, PhD, president and CEO of Seattle Genetics.

Dirk Huebner, MD, executive medical director of oncology at Takeda Pharmaceutical Company, said the results of the trial “have the potential to change the treatment approach of frontline advanced Hodgkin lymphoma.”

Seattle Genetics and Takeda are jointly developing brentuximab vedotin. Seattle Genetics has US and Canadian commercialization rights and Takeda has rights to commercialize it in the rest of the world.

Brentuximab vedotin is an antibody-drug conjugate (ADC) made up of an anti-CD30 monoclonal antibody attached by a linker to monomethyl auristatin E (MMAE). The linker system is stable in the bloodstream but releases MMAE when internalized into CD30-expressing tumor cells.

ECHELON-1

ECHELON-1 (NCT01712490) is a randomized, 2-arm, multicenter phase 3 trial comparing brentuximab vedotin plus AVD to ABVD as frontline therapy in treatment-naïve advanced HL.

The trial enrolled 1334 patients with histologically confirmed advanced HL.

The primary endpoint is mPFS by independent review facility.

The investigators, regulatory bodies, and trial sponsors defined mPFS as the time to progression, death, or receipt of additional anticancer therapy for patients who were not in complete response (CR) after completion of frontline therapy.

They chose mPFS instead of PFS because they say it provides a clearer picture of the efficacy of primary anticancer therapy by eliminating the confounding effects of additional anticancer therapy.

Secondary endpoints include overall survival (OS), CR, and safety.

The results demonstrated that combination treatment with brentuximab resulted in a statistically significant improvement in mPFS versus the control arm (hazard ratio=0.770; P=0.035).

Interim analysis of OS, the key secondary endpoint, also trended in favor of the brentuximab plus AVD arm.

The safety profile of the brentuximab combination was consistent with that of the single-agent components of the regimen.

Patients in the brentuximab arm experienced an increased incidence of febrile neutropenia and peripheral neuropathy compared to the ABVD arm.

Febrile neutropenia was reduced with the use of prophylactic growth factors.

Peripheral neuropathy was managed through dose modifications.

Patients treated with ABVD had an increased rate and severity of pulmonary toxicity.

The companies plan to submit an abstract for presentation at the American Society of Hematology annual meeting in December.

Brentuximab is currently approved by the US Food and Drug Administration (FDA) for the treatment of patients with classical HL who have received a prior stem cell transplant or 2 prior chemotherapy treatments.

Brentuximab is also approved to treat patient with anaplastic large cell lymphoma who have failed one prior treatment.

For more on brentuximab vedotin, see the full prescribing informtion. 

Photo courtesy of CDC

The oral, once-daily factor Xa inhibitor betrixaban (Bevyxxa®) was granted approval by the US Food and Drug Administration (FDA) under priority review.

Betrixaban is the first and only anticoagulant for hospital and extended duration prophylaxis of venous thromboembolism (VTE) in adult patients hospitalized for an acute medical illness at risk for thromboembolic complications due to restricted mobility and other risk factors for VTE, according to Portola Pharmaceuticals, Inc, the drug’s developer.

Betrixaban had also received fast track designation from the FDA.

Betrixaban is Portola’s first commercial product.

The FDA approved betrixaban based on data from the phase 3 APEX trial, a randomized, double-blind multinational clinical trial comparing extended duration betrixaban to short duration of enoxaparin.

The trial enrolled 7513 patients at more than 450 clinical sites worldwide. The patients were acutely ill with medical conditions, hospitalized, and had risk factors for VTE.

Patients who received betrixaban had an initial dose of 160 mg orally on day 1, 80 mg once daily for 35 to 42 days, and a placebo injection once daily for 6 to 14 days.

Patients who received enoxaparin had a 40 mg injection subcutaneously once daily for 6 to 14 days and a placebo pill orally once daily for 35 to 42 days.

Efficacy data was analyzed in 7441 patients and assessed by a composite outcome score comprising either the occurrence of asymptomatic proximal deep vein thrombosis (DVT) or symptomatic DVT, non-fatal pulmonary embolism (PE), or VTE-related death.

Investigators observed fewer events in patients receiving betrixaban (4.4%) compared with those taking enoxaparin (6%) (relative risk 0.75, 95% CI: 0.61, 0.91) with no significant increase in major bleeding (0.67% vs 0.57%, respectively).

The most common adverse reactions with betrixaban occurring in 5% or more of patients were related to bleeding.

Overall, 54% of patients receiving betrixaban experienced at least one adverse reaction compared with 52% taking enoxaparin.

The frequency of patients reporting serious adverse reactions was similar between betrixaban (18%) and enoxaparin (17%).

The most frequent reason for treatment discontinuation was bleeding, with an incidence rate for all bleeding episodes of 2.4% and 1.2% for betrixaban and enoxaparin, respectively.

The incidence rate for major bleeding episodes was 0.67% and 0.57% for betrixaban and enoxaparin, respectively.

Portola expects to launch betrixaban between August and November 2017.

The European Medicines Agency’s Committee for Human Medicinal Products (CHMP) is reviewing betrixaban for marketing authorization under its standard review period.

Portola is also advancing clinical development of andexanet alfa (AndexXa®) and cerdulatinib.

Andexanet alfa is a recombinant protein designed to reverse the anticoagulant effect in patients treated with an oral or injectable factor Xa inhibitor.

Cerdulatinib is a Syk/JAK inhibitor to treat hematologic cancers.

See the full prescribing information for more details on betrixaban. 

Photo courtesy of CDC

The oral, once-daily factor Xa inhibitor betrixaban (Bevyxxa®) was granted approval by the US Food and Drug Administration (FDA) under priority review.

Betrixaban is the first and only anticoagulant for hospital and extended duration prophylaxis of venous thromboembolism (VTE) in adult patients hospitalized for an acute medical illness at risk for thromboembolic complications due to restricted mobility and other risk factors for VTE, according to Portola Pharmaceuticals, Inc, the drug’s developer.

Betrixaban had also received fast track designation from the FDA.

Betrixaban is Portola’s first commercial product.

The FDA approved betrixaban based on data from the phase 3 APEX trial, a randomized, double-blind multinational clinical trial comparing extended duration betrixaban to short duration of enoxaparin.

The trial enrolled 7513 patients at more than 450 clinical sites worldwide. The patients were acutely ill with medical conditions, hospitalized, and had risk factors for VTE.

Patients who received betrixaban had an initial dose of 160 mg orally on day 1, 80 mg once daily for 35 to 42 days, and a placebo injection once daily for 6 to 14 days.

Patients who received enoxaparin had a 40 mg injection subcutaneously once daily for 6 to 14 days and a placebo pill orally once daily for 35 to 42 days.

Efficacy data was analyzed in 7441 patients and assessed by a composite outcome score comprising either the occurrence of asymptomatic proximal deep vein thrombosis (DVT) or symptomatic DVT, non-fatal pulmonary embolism (PE), or VTE-related death.

Investigators observed fewer events in patients receiving betrixaban (4.4%) compared with those taking enoxaparin (6%) (relative risk 0.75, 95% CI: 0.61, 0.91) with no significant increase in major bleeding (0.67% vs 0.57%, respectively).

The most common adverse reactions with betrixaban occurring in 5% or more of patients were related to bleeding.

Overall, 54% of patients receiving betrixaban experienced at least one adverse reaction compared with 52% taking enoxaparin.

The frequency of patients reporting serious adverse reactions was similar between betrixaban (18%) and enoxaparin (17%).

The most frequent reason for treatment discontinuation was bleeding, with an incidence rate for all bleeding episodes of 2.4% and 1.2% for betrixaban and enoxaparin, respectively.

The incidence rate for major bleeding episodes was 0.67% and 0.57% for betrixaban and enoxaparin, respectively.

Portola expects to launch betrixaban between August and November 2017.

The European Medicines Agency’s Committee for Human Medicinal Products (CHMP) is reviewing betrixaban for marketing authorization under its standard review period.

Portola is also advancing clinical development of andexanet alfa (AndexXa®) and cerdulatinib.

Andexanet alfa is a recombinant protein designed to reverse the anticoagulant effect in patients treated with an oral or injectable factor Xa inhibitor.

Cerdulatinib is a Syk/JAK inhibitor to treat hematologic cancers.

See the full prescribing information for more details on betrixaban. 

Photo courtesy of CDC

The oral, once-daily factor Xa inhibitor betrixaban (Bevyxxa®) was granted approval by the US Food and Drug Administration (FDA) under priority review.

Betrixaban is the first and only anticoagulant for hospital and extended duration prophylaxis of venous thromboembolism (VTE) in adult patients hospitalized for an acute medical illness at risk for thromboembolic complications due to restricted mobility and other risk factors for VTE, according to Portola Pharmaceuticals, Inc, the drug’s developer.

Betrixaban had also received fast track designation from the FDA.

Betrixaban is Portola’s first commercial product.

The FDA approved betrixaban based on data from the phase 3 APEX trial, a randomized, double-blind multinational clinical trial comparing extended duration betrixaban to short duration of enoxaparin.

The trial enrolled 7513 patients at more than 450 clinical sites worldwide. The patients were acutely ill with medical conditions, hospitalized, and had risk factors for VTE.

Patients who received betrixaban had an initial dose of 160 mg orally on day 1, 80 mg once daily for 35 to 42 days, and a placebo injection once daily for 6 to 14 days.

Patients who received enoxaparin had a 40 mg injection subcutaneously once daily for 6 to 14 days and a placebo pill orally once daily for 35 to 42 days.

Efficacy data was analyzed in 7441 patients and assessed by a composite outcome score comprising either the occurrence of asymptomatic proximal deep vein thrombosis (DVT) or symptomatic DVT, non-fatal pulmonary embolism (PE), or VTE-related death.

Investigators observed fewer events in patients receiving betrixaban (4.4%) compared with those taking enoxaparin (6%) (relative risk 0.75, 95% CI: 0.61, 0.91) with no significant increase in major bleeding (0.67% vs 0.57%, respectively).

The most common adverse reactions with betrixaban occurring in 5% or more of patients were related to bleeding.

Overall, 54% of patients receiving betrixaban experienced at least one adverse reaction compared with 52% taking enoxaparin.

The frequency of patients reporting serious adverse reactions was similar between betrixaban (18%) and enoxaparin (17%).

The most frequent reason for treatment discontinuation was bleeding, with an incidence rate for all bleeding episodes of 2.4% and 1.2% for betrixaban and enoxaparin, respectively.

The incidence rate for major bleeding episodes was 0.67% and 0.57% for betrixaban and enoxaparin, respectively.

Portola expects to launch betrixaban between August and November 2017.

The European Medicines Agency’s Committee for Human Medicinal Products (CHMP) is reviewing betrixaban for marketing authorization under its standard review period.

Portola is also advancing clinical development of andexanet alfa (AndexXa®) and cerdulatinib.

Andexanet alfa is a recombinant protein designed to reverse the anticoagulant effect in patients treated with an oral or injectable factor Xa inhibitor.

Cerdulatinib is a Syk/JAK inhibitor to treat hematologic cancers.

See the full prescribing information for more details on betrixaban. 

Image by Peter H. Seeberger

Progress is being made in the battle against malaria. From engineering a mosquito-killing fungus to discovering new anti-malaria targets, scientists are making advances on multiple malaria fronts.

And US aid to combat malaria is having a positive impact on reducing childhood mortality in 19 sub-Saharan countries.  A few of the recent developments are described here.

Genetic engineering

Scientists developed a genetic technique that disrupts the heme synthesis pathway in Plasmodium berghei parasites, which could be an effective way to target Plasmodium parasites in the liver.

Heme synthesis is essential for P berghei development in mosquitoes that transmit the parasite between rodent hosts. However, the pathway is not essential during a later stage of the parasite’s development in the bloodstream.

So researchers produced P berghei parasites capable of expressing the FC gene. The FC (ferrochelatase) gene allows P berghei to produce heme. The parasites could develop properly in mosquitoes, but produced some FC-deficient parasites once they infected mouse liver cells.

FC-deficient parasites were unable to complete their liver development phase.

The team says this approach would be prophylactic, since malaria symptoms aren't apparent until the parasite leaves the liver and begins its bloodstream phase.

The team published its findings in PLOS Pathogens.

Mosquito-killing fungi

 In a report that sounds almost like a science fiction story, researchers genetically engineered a fungus to kill mosquitoes by producing spider and scorpion toxins.

They suggest this method could serve as a highly effective biological control mechanism to fight malaria-carrying mosquitoes.

The researchers isolated genes that express neurotoxins from the venom of scorpions and spiders. They then engineered the genes into the fungus's DNA.

The researchers used the fungus Metarhizium pingshaensei, which is a natural killer of mosquitoes.

The fungus was originally isolated from a mosquito and previous evidence suggests it is specific to disease-carrying mosquito species, including Anopheles gambiae and Aedes aegypti.

When spores of the fungus contact a mosquito's body, the spores germinate and penetrate the insect's exoskeleton, eventually killing the insect host from the inside out.

And the most potent fungal strains, Brian Lovett, a graduate student at the University of Maryland in College Park, explained, “are able to kill mosquitoes with a single spore."

He added that the fungi also stop mosquitoes from blood feeding. Taken together, this means “that our fungal strains are capable of preventing transmission of disease by more than 90 percent of mosquitoes after just 5 days."

The fungus is specific to mosquitoes and does not pose a risk to humans. The study results also suggest the fungus is safe for honeybees and other insects.

The researchers plan to expand on-the-ground testing in Burkina Faso.

For more on this mosquito-killing approach, see their study published in Scientific Reports.

Potential new target

Researchers have described a new protein, the transcription factor PfAP2-I, which they say may turn out to be an effective target to combat drug-resistant malaria parasites.

PfAP2-I regulates genes involved with the parasite's invasion of red blood cells. This is a critical part of the parasite's 3-stage life cycle that could be targeted by new anti-malarial drugs.

“Most multi-celled organisms have hundreds of these regulators,” said lead author Manuel Llinás, PhD, of Penn State University in State College, Pennsylvania, “but it turns out, so far as we can recognize, the [Plasmodium] parasite has a single family of transcription factors called Apicomplexan AP2 proteins. One of these transcription factors is PfAP2-I."

PfAP2-I is the first known regulator of invasion genes in Plasmodium falciparum.

The new study also indicates that PfAP2-I likely recruits another protein, Bromodomain Protein 1 (PfBDP1), which was previously shown to be involved in the invasion of red blood cells.

The two proteins may work together to regulate gene transcription during this critical stage of infection.

For more on this potential new target, see their study published in Cell Host & Microbe.

Parasite diversity

 Not all malaria infections result in life-threatening anemia and organ failure, and so a research team led by Matthew B. B. McCall, MD, PhD, of Erasmus Medical Center in Rotterdam, the Netherlands, set out to determine why.

They exposed 23 healthy human volunteers to sets of 5 mosquitoes carrying the NF54, NF135.C10, or NF166.C8 isolates of P falciparum.

All volunteers developed parasitemia, were treated with anti-malarial drugs, and recovered, although some strains caused more severe symptoms.

The investigators found that 3 geographic and genetically diverse forms of the parasite each demonstrated a distinct ability to infect liver cells.

They also observed the degree of infection in human liver cells growing in culture was closely correlated with parasite loads in the bloodstream.

The investigators believe the variability among parasite types suggests that malaria vaccines should use multiple strains.

In addition, the infectivity of different parasite strains could vary in populations previously exposed to malaria.

For more details on parasite diversity, see the team’s findings in Science Translational Medicine.

Malaria test

A new malaria test can diagnose malaria faster and more reliably than current methods, according to a report in the NL Times.

The new test uses an algorithm that can diagnose malaria at a rate of 120 blood tests per hour.  It is 97% accurate.

Rather than search for the parasite itself in blood samples, the new test analyzes the effect the infection has on the blood, such as shape and density of red blood cells, hemoglobin level, and 27 other parameters simultaneously.

The developers won the European Inventor Award for the rapid malaria test, which will be further developed by Siemens.

Aid to combat malaria

The US malaria initiative in 19 sub-Saharan African countries has contributed to a 16% reduction in the annual risk of mortality for children under 5 years, according to a new study published in PLOS Medicine.

Thirteen sub-Saharan countries did not receive funding from the initiative, which allowed researchers to compare and analyze the impact of the intervention.

Because the study may have had confounding variables that were not measured, however, the results could not be definitively interpreted as causal evidence of the reduction in child mortality rates.

However, they do indicate an association between the receipt of funding and mortality.

The funding went to support malaria prevention technologies, such as insecticide-treated nets and indoor residual spraying.

The authors believe further investment in these interventions “may translate to additional lives saved, reduced household financial burdens associated with caring for ill household members and lost wages, and less strain on health systems associated with treating malaria cases.”

Countries that received funding included: Angola, Benin, Congo DRC, Ethiopia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Nigeria, Rwanda, Senegal, Tanzania, Uganda, Zambia, and Zimbabwe.

Comparison countries include: Burkina Faso, Burundi, Cameroon, Chad, Congo, Cote d’Ivoire, Gabon, Namibia, Niger, Sierra Leone, Swaziland, The Gambia, and Togo. 

Image by Peter H. Seeberger

Progress is being made in the battle against malaria. From engineering a mosquito-killing fungus to discovering new anti-malaria targets, scientists are making advances on multiple malaria fronts.

And US aid to combat malaria is having a positive impact on reducing childhood mortality in 19 sub-Saharan countries.  A few of the recent developments are described here.

Genetic engineering

Scientists developed a genetic technique that disrupts the heme synthesis pathway in Plasmodium berghei parasites, which could be an effective way to target Plasmodium parasites in the liver.

Heme synthesis is essential for P berghei development in mosquitoes that transmit the parasite between rodent hosts. However, the pathway is not essential during a later stage of the parasite’s development in the bloodstream.

So researchers produced P berghei parasites capable of expressing the FC gene. The FC (ferrochelatase) gene allows P berghei to produce heme. The parasites could develop properly in mosquitoes, but produced some FC-deficient parasites once they infected mouse liver cells.

FC-deficient parasites were unable to complete their liver development phase.

The team says this approach would be prophylactic, since malaria symptoms aren't apparent until the parasite leaves the liver and begins its bloodstream phase.

The team published its findings in PLOS Pathogens.

Mosquito-killing fungi

 In a report that sounds almost like a science fiction story, researchers genetically engineered a fungus to kill mosquitoes by producing spider and scorpion toxins.

They suggest this method could serve as a highly effective biological control mechanism to fight malaria-carrying mosquitoes.

The researchers isolated genes that express neurotoxins from the venom of scorpions and spiders. They then engineered the genes into the fungus's DNA.

The researchers used the fungus Metarhizium pingshaensei, which is a natural killer of mosquitoes.

The fungus was originally isolated from a mosquito and previous evidence suggests it is specific to disease-carrying mosquito species, including Anopheles gambiae and Aedes aegypti.

When spores of the fungus contact a mosquito's body, the spores germinate and penetrate the insect's exoskeleton, eventually killing the insect host from the inside out.

And the most potent fungal strains, Brian Lovett, a graduate student at the University of Maryland in College Park, explained, “are able to kill mosquitoes with a single spore."

He added that the fungi also stop mosquitoes from blood feeding. Taken together, this means “that our fungal strains are capable of preventing transmission of disease by more than 90 percent of mosquitoes after just 5 days."

The fungus is specific to mosquitoes and does not pose a risk to humans. The study results also suggest the fungus is safe for honeybees and other insects.

The researchers plan to expand on-the-ground testing in Burkina Faso.

For more on this mosquito-killing approach, see their study published in Scientific Reports.

Potential new target

Researchers have described a new protein, the transcription factor PfAP2-I, which they say may turn out to be an effective target to combat drug-resistant malaria parasites.

PfAP2-I regulates genes involved with the parasite's invasion of red blood cells. This is a critical part of the parasite's 3-stage life cycle that could be targeted by new anti-malarial drugs.

“Most multi-celled organisms have hundreds of these regulators,” said lead author Manuel Llinás, PhD, of Penn State University in State College, Pennsylvania, “but it turns out, so far as we can recognize, the [Plasmodium] parasite has a single family of transcription factors called Apicomplexan AP2 proteins. One of these transcription factors is PfAP2-I."

PfAP2-I is the first known regulator of invasion genes in Plasmodium falciparum.

The new study also indicates that PfAP2-I likely recruits another protein, Bromodomain Protein 1 (PfBDP1), which was previously shown to be involved in the invasion of red blood cells.

The two proteins may work together to regulate gene transcription during this critical stage of infection.

For more on this potential new target, see their study published in Cell Host & Microbe.

Parasite diversity

 Not all malaria infections result in life-threatening anemia and organ failure, and so a research team led by Matthew B. B. McCall, MD, PhD, of Erasmus Medical Center in Rotterdam, the Netherlands, set out to determine why.

They exposed 23 healthy human volunteers to sets of 5 mosquitoes carrying the NF54, NF135.C10, or NF166.C8 isolates of P falciparum.

All volunteers developed parasitemia, were treated with anti-malarial drugs, and recovered, although some strains caused more severe symptoms.

The investigators found that 3 geographic and genetically diverse forms of the parasite each demonstrated a distinct ability to infect liver cells.

They also observed the degree of infection in human liver cells growing in culture was closely correlated with parasite loads in the bloodstream.

The investigators believe the variability among parasite types suggests that malaria vaccines should use multiple strains.

In addition, the infectivity of different parasite strains could vary in populations previously exposed to malaria.

For more details on parasite diversity, see the team’s findings in Science Translational Medicine.

Malaria test

A new malaria test can diagnose malaria faster and more reliably than current methods, according to a report in the NL Times.

The new test uses an algorithm that can diagnose malaria at a rate of 120 blood tests per hour.  It is 97% accurate.

Rather than search for the parasite itself in blood samples, the new test analyzes the effect the infection has on the blood, such as shape and density of red blood cells, hemoglobin level, and 27 other parameters simultaneously.

The developers won the European Inventor Award for the rapid malaria test, which will be further developed by Siemens.

Aid to combat malaria

The US malaria initiative in 19 sub-Saharan African countries has contributed to a 16% reduction in the annual risk of mortality for children under 5 years, according to a new study published in PLOS Medicine.

Thirteen sub-Saharan countries did not receive funding from the initiative, which allowed researchers to compare and analyze the impact of the intervention.

Because the study may have had confounding variables that were not measured, however, the results could not be definitively interpreted as causal evidence of the reduction in child mortality rates.

However, they do indicate an association between the receipt of funding and mortality.

The funding went to support malaria prevention technologies, such as insecticide-treated nets and indoor residual spraying.

The authors believe further investment in these interventions “may translate to additional lives saved, reduced household financial burdens associated with caring for ill household members and lost wages, and less strain on health systems associated with treating malaria cases.”

Countries that received funding included: Angola, Benin, Congo DRC, Ethiopia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Nigeria, Rwanda, Senegal, Tanzania, Uganda, Zambia, and Zimbabwe.

Comparison countries include: Burkina Faso, Burundi, Cameroon, Chad, Congo, Cote d’Ivoire, Gabon, Namibia, Niger, Sierra Leone, Swaziland, The Gambia, and Togo. 

Image by Peter H. Seeberger

Progress is being made in the battle against malaria. From engineering a mosquito-killing fungus to discovering new anti-malaria targets, scientists are making advances on multiple malaria fronts.

And US aid to combat malaria is having a positive impact on reducing childhood mortality in 19 sub-Saharan countries.  A few of the recent developments are described here.

Genetic engineering

Scientists developed a genetic technique that disrupts the heme synthesis pathway in Plasmodium berghei parasites, which could be an effective way to target Plasmodium parasites in the liver.

Heme synthesis is essential for P berghei development in mosquitoes that transmit the parasite between rodent hosts. However, the pathway is not essential during a later stage of the parasite’s development in the bloodstream.

So researchers produced P berghei parasites capable of expressing the FC gene. The FC (ferrochelatase) gene allows P berghei to produce heme. The parasites could develop properly in mosquitoes, but produced some FC-deficient parasites once they infected mouse liver cells.

FC-deficient parasites were unable to complete their liver development phase.

The team says this approach would be prophylactic, since malaria symptoms aren't apparent until the parasite leaves the liver and begins its bloodstream phase.

The team published its findings in PLOS Pathogens.

Mosquito-killing fungi

 In a report that sounds almost like a science fiction story, researchers genetically engineered a fungus to kill mosquitoes by producing spider and scorpion toxins.

They suggest this method could serve as a highly effective biological control mechanism to fight malaria-carrying mosquitoes.

The researchers isolated genes that express neurotoxins from the venom of scorpions and spiders. They then engineered the genes into the fungus's DNA.

The researchers used the fungus Metarhizium pingshaensei, which is a natural killer of mosquitoes.

The fungus was originally isolated from a mosquito and previous evidence suggests it is specific to disease-carrying mosquito species, including Anopheles gambiae and Aedes aegypti.

When spores of the fungus contact a mosquito's body, the spores germinate and penetrate the insect's exoskeleton, eventually killing the insect host from the inside out.

And the most potent fungal strains, Brian Lovett, a graduate student at the University of Maryland in College Park, explained, “are able to kill mosquitoes with a single spore."

He added that the fungi also stop mosquitoes from blood feeding. Taken together, this means “that our fungal strains are capable of preventing transmission of disease by more than 90 percent of mosquitoes after just 5 days."

The fungus is specific to mosquitoes and does not pose a risk to humans. The study results also suggest the fungus is safe for honeybees and other insects.

The researchers plan to expand on-the-ground testing in Burkina Faso.

For more on this mosquito-killing approach, see their study published in Scientific Reports.

Potential new target

Researchers have described a new protein, the transcription factor PfAP2-I, which they say may turn out to be an effective target to combat drug-resistant malaria parasites.

PfAP2-I regulates genes involved with the parasite's invasion of red blood cells. This is a critical part of the parasite's 3-stage life cycle that could be targeted by new anti-malarial drugs.

“Most multi-celled organisms have hundreds of these regulators,” said lead author Manuel Llinás, PhD, of Penn State University in State College, Pennsylvania, “but it turns out, so far as we can recognize, the [Plasmodium] parasite has a single family of transcription factors called Apicomplexan AP2 proteins. One of these transcription factors is PfAP2-I."

PfAP2-I is the first known regulator of invasion genes in Plasmodium falciparum.

The new study also indicates that PfAP2-I likely recruits another protein, Bromodomain Protein 1 (PfBDP1), which was previously shown to be involved in the invasion of red blood cells.

The two proteins may work together to regulate gene transcription during this critical stage of infection.

For more on this potential new target, see their study published in Cell Host & Microbe.

Parasite diversity

 Not all malaria infections result in life-threatening anemia and organ failure, and so a research team led by Matthew B. B. McCall, MD, PhD, of Erasmus Medical Center in Rotterdam, the Netherlands, set out to determine why.

They exposed 23 healthy human volunteers to sets of 5 mosquitoes carrying the NF54, NF135.C10, or NF166.C8 isolates of P falciparum.

All volunteers developed parasitemia, were treated with anti-malarial drugs, and recovered, although some strains caused more severe symptoms.

The investigators found that 3 geographic and genetically diverse forms of the parasite each demonstrated a distinct ability to infect liver cells.

They also observed the degree of infection in human liver cells growing in culture was closely correlated with parasite loads in the bloodstream.

The investigators believe the variability among parasite types suggests that malaria vaccines should use multiple strains.

In addition, the infectivity of different parasite strains could vary in populations previously exposed to malaria.

For more details on parasite diversity, see the team’s findings in Science Translational Medicine.

Malaria test

A new malaria test can diagnose malaria faster and more reliably than current methods, according to a report in the NL Times.

The new test uses an algorithm that can diagnose malaria at a rate of 120 blood tests per hour.  It is 97% accurate.

Rather than search for the parasite itself in blood samples, the new test analyzes the effect the infection has on the blood, such as shape and density of red blood cells, hemoglobin level, and 27 other parameters simultaneously.

The developers won the European Inventor Award for the rapid malaria test, which will be further developed by Siemens.

Aid to combat malaria

The US malaria initiative in 19 sub-Saharan African countries has contributed to a 16% reduction in the annual risk of mortality for children under 5 years, according to a new study published in PLOS Medicine.

Thirteen sub-Saharan countries did not receive funding from the initiative, which allowed researchers to compare and analyze the impact of the intervention.

Because the study may have had confounding variables that were not measured, however, the results could not be definitively interpreted as causal evidence of the reduction in child mortality rates.

However, they do indicate an association between the receipt of funding and mortality.

The funding went to support malaria prevention technologies, such as insecticide-treated nets and indoor residual spraying.

The authors believe further investment in these interventions “may translate to additional lives saved, reduced household financial burdens associated with caring for ill household members and lost wages, and less strain on health systems associated with treating malaria cases.”

Countries that received funding included: Angola, Benin, Congo DRC, Ethiopia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Nigeria, Rwanda, Senegal, Tanzania, Uganda, Zambia, and Zimbabwe.

Comparison countries include: Burkina Faso, Burundi, Cameroon, Chad, Congo, Cote d’Ivoire, Gabon, Namibia, Niger, Sierra Leone, Swaziland, The Gambia, and Togo. 

Syringe

The US Food and Drug Administration (FDA) approved a new, subcutaneous (SC) formulation of rituximab with hyaluronidase human (Rituxan Hycela™).

The new formulation includes the same monoclonal antibody as intravenous rituximab, but is combined with an enzyme that helps to deliver rituximab under the skin.

The new treatment reduces administration time from 1.5 hours or more for intravenous rituximab to 5 to 7 minutes for the subcutaneous injection.

It is approved for use in adults with previously untreated and relapsed or refractory follicular lymphoma (FL), previously untreated diffuse large B-cell lymphoma (DLBCL), and previously untreated and previously treated chronic lymphocytic leukemia (CLL).

“[P]eople with 3 of the most common blood cancers now have a new treatment option which provides efficacy comparable with intravenous Rituxan and can be delivered under the skin in minutes instead of hours through IV infusion,” said Sandra Horning, MD, chief medical officer of Genentech.

Rituxan Hycela is manufactured by Genentech, Inc, a member of the Roche Group, and jointly marketed by Biogen and Genentech USA, Inc.

“People who benefit from Rituxan may receive years of repeated treatments for their blood cancer, so an option that reduces the administration time can be important,” she noted.

The FDA based its decision on results from 4 clinical studies:

• SABRINA (NCT01200758): Phase 3 combination study with chemotherapy and maintenance study in previously untreated FL
• SAWYER (NCT01292603): Phase 1b study in previously untreated CLL
• MabEase (NCT01649856): Phase 3 study in previously untreated DLBCL
• PrefMab (NCT01724021): Phase 3 patient preference study in previously untreated FL and DLBCL

This last study showed that 77% of patients preferred subcutaneous over intravenous administration, primarily because it reduced administration time.

Together, these trials represented nearly 2,000 people and demonstrated that subcutaneous administration of rituximab/hyaluronidase resulted in non-inferior levels of rituximab in the blood compared to intravenous rituximab.

And the subcutaneous formulation also demonstrated comparable clinical efficacy outcomes to the intravenous formulation.

Patients must have had at least 1 full dose of intravenous rituximab without severe adverse reactions before receiving the subcutaneous injection. There is a higher risk of certain severe adverse reactions during the first infusion.

The safety profile of rituximab/hyaluronidase is also comparable to intravenous rituximab, except for cutaneous reactions.

The most common (≥20%) adverse reactions observed with rituximab/hyaluronidase were:

• In FL, infections, neutropenia, nausea, constipation, cough, and fatigue.
• In DLBCL, infections, neutropenia, alopecia, nausea, and anemia.
• In CLL, infections, neutropenia, nausea, thrombocytopenia, pyrexia, vomiting, and erythema at the injection site.

Rituxan Hycela will be available in the US within 1 to 2 weeks, according to the manufacturer. Intravenous rituximab will continue to be available.

A subcutaneous formulation of rituximab (MabThera) had previously been approved for use in European markets by the European Commission.

For further information on the new US formulation, see the full prescribing information. 

Syringe

The US Food and Drug Administration (FDA) approved a new, subcutaneous (SC) formulation of rituximab with hyaluronidase human (Rituxan Hycela™).

The new formulation includes the same monoclonal antibody as intravenous rituximab, but is combined with an enzyme that helps to deliver rituximab under the skin.

The new treatment reduces administration time from 1.5 hours or more for intravenous rituximab to 5 to 7 minutes for the subcutaneous injection.

It is approved for use in adults with previously untreated and relapsed or refractory follicular lymphoma (FL), previously untreated diffuse large B-cell lymphoma (DLBCL), and previously untreated and previously treated chronic lymphocytic leukemia (CLL).

“[P]eople with 3 of the most common blood cancers now have a new treatment option which provides efficacy comparable with intravenous Rituxan and can be delivered under the skin in minutes instead of hours through IV infusion,” said Sandra Horning, MD, chief medical officer of Genentech.

Rituxan Hycela is manufactured by Genentech, Inc, a member of the Roche Group, and jointly marketed by Biogen and Genentech USA, Inc.

“People who benefit from Rituxan may receive years of repeated treatments for their blood cancer, so an option that reduces the administration time can be important,” she noted.

The FDA based its decision on results from 4 clinical studies:

• SABRINA (NCT01200758): Phase 3 combination study with chemotherapy and maintenance study in previously untreated FL
• SAWYER (NCT01292603): Phase 1b study in previously untreated CLL
• MabEase (NCT01649856): Phase 3 study in previously untreated DLBCL
• PrefMab (NCT01724021): Phase 3 patient preference study in previously untreated FL and DLBCL

This last study showed that 77% of patients preferred subcutaneous over intravenous administration, primarily because it reduced administration time.

Together, these trials represented nearly 2,000 people and demonstrated that subcutaneous administration of rituximab/hyaluronidase resulted in non-inferior levels of rituximab in the blood compared to intravenous rituximab.

And the subcutaneous formulation also demonstrated comparable clinical efficacy outcomes to the intravenous formulation.

Patients must have had at least 1 full dose of intravenous rituximab without severe adverse reactions before receiving the subcutaneous injection. There is a higher risk of certain severe adverse reactions during the first infusion.

The safety profile of rituximab/hyaluronidase is also comparable to intravenous rituximab, except for cutaneous reactions.

The most common (≥20%) adverse reactions observed with rituximab/hyaluronidase were:

• In FL, infections, neutropenia, nausea, constipation, cough, and fatigue.
• In DLBCL, infections, neutropenia, alopecia, nausea, and anemia.
• In CLL, infections, neutropenia, nausea, thrombocytopenia, pyrexia, vomiting, and erythema at the injection site.

Rituxan Hycela will be available in the US within 1 to 2 weeks, according to the manufacturer. Intravenous rituximab will continue to be available.

A subcutaneous formulation of rituximab (MabThera) had previously been approved for use in European markets by the European Commission.

For further information on the new US formulation, see the full prescribing information. 

Syringe

The US Food and Drug Administration (FDA) approved a new, subcutaneous (SC) formulation of rituximab with hyaluronidase human (Rituxan Hycela™).

The new formulation includes the same monoclonal antibody as intravenous rituximab, but is combined with an enzyme that helps to deliver rituximab under the skin.

The new treatment reduces administration time from 1.5 hours or more for intravenous rituximab to 5 to 7 minutes for the subcutaneous injection.

It is approved for use in adults with previously untreated and relapsed or refractory follicular lymphoma (FL), previously untreated diffuse large B-cell lymphoma (DLBCL), and previously untreated and previously treated chronic lymphocytic leukemia (CLL).

“[P]eople with 3 of the most common blood cancers now have a new treatment option which provides efficacy comparable with intravenous Rituxan and can be delivered under the skin in minutes instead of hours through IV infusion,” said Sandra Horning, MD, chief medical officer of Genentech.

Rituxan Hycela is manufactured by Genentech, Inc, a member of the Roche Group, and jointly marketed by Biogen and Genentech USA, Inc.

“People who benefit from Rituxan may receive years of repeated treatments for their blood cancer, so an option that reduces the administration time can be important,” she noted.

The FDA based its decision on results from 4 clinical studies:

• SABRINA (NCT01200758): Phase 3 combination study with chemotherapy and maintenance study in previously untreated FL
• SAWYER (NCT01292603): Phase 1b study in previously untreated CLL
• MabEase (NCT01649856): Phase 3 study in previously untreated DLBCL
• PrefMab (NCT01724021): Phase 3 patient preference study in previously untreated FL and DLBCL

This last study showed that 77% of patients preferred subcutaneous over intravenous administration, primarily because it reduced administration time.

Together, these trials represented nearly 2,000 people and demonstrated that subcutaneous administration of rituximab/hyaluronidase resulted in non-inferior levels of rituximab in the blood compared to intravenous rituximab.

And the subcutaneous formulation also demonstrated comparable clinical efficacy outcomes to the intravenous formulation.

Patients must have had at least 1 full dose of intravenous rituximab without severe adverse reactions before receiving the subcutaneous injection. There is a higher risk of certain severe adverse reactions during the first infusion.

The safety profile of rituximab/hyaluronidase is also comparable to intravenous rituximab, except for cutaneous reactions.

The most common (≥20%) adverse reactions observed with rituximab/hyaluronidase were:

• In FL, infections, neutropenia, nausea, constipation, cough, and fatigue.
• In DLBCL, infections, neutropenia, alopecia, nausea, and anemia.
• In CLL, infections, neutropenia, nausea, thrombocytopenia, pyrexia, vomiting, and erythema at the injection site.

Rituxan Hycela will be available in the US within 1 to 2 weeks, according to the manufacturer. Intravenous rituximab will continue to be available.

A subcutaneous formulation of rituximab (MabThera) had previously been approved for use in European markets by the European Commission.

For further information on the new US formulation, see the full prescribing information. 

Photo by Rhoda Baer

A small study of 20 children aged 8 to 18 years with incurable or refractory cancers indicates children are reliable reporters of their symptoms and side effects.

The investigators collected reports from the children, who were enrolled on phase 1/2 clinical trials at 4 cancer centers and undergoing their first courses of chemotherapy.

The team assessed the feasibility and acceptability of collecting symptom, function, and quality of life (QOL) reports from the study participants.

The investigators also evaluated the measurement tool and interview questions at 2 time points.

They contend the youths’ self-reports potentially could be a new trial endpoint.

According to the investigators, only rarely do patient-reported outcomes (PROs) get incorporated into pediatric phase 1 or phase 2 trials.

And because these trials contribute to drug indications and labeling, the researchers decided to assess whether it was feasible to enroll young people and retain them in a PRO endeavor.

The researchers also assessed the reliability, validity, responsiveness, and range of the pediatric measures employed. They used the Patient-Reported Outcomes Measurement Information System (PROMIS) to capture statistically significant and clinically meaningful changes or minimally important differences (MIDs) in PROs.

Pamela S. Hinds, PhD, RN, of George Washington University in Washington, DC,  reported the findings on behalf of the Children's National Health System researchers in Cancer, the journal of the American Cancer Society.

"When experimental cancer drugs are studied, researchers collect details about how these promising therapies affect children's organs, but rarely do they ask the children themselves about symptoms they feel or the side effects they experience," Dr Hinds said.

"Without this crucial information, the full impact of the experimental treatment on the pediatric patient is likely underreported and clinicians are hobbled in their ability to effectively manage side effects," she added.

The team recruited children and adolescents enrolled in phase 1 safety or phase 2 efficacy trials at Children's National, Seattle Children's Hospital, Children's Hospital of Philadelphia, and Boston Children's Hospital.

Findings

Sixty percent of the participants were male and 70% were white.

Median age of the participants was 13.6 years: 7 (35%) were age 8 to 12, and 13 (65%) were 13 to 17.

Thirteen participants (65%) had solid tumors, 5 (25%) had brain tumors, and 2 (10%) had lymphoma.

A total of 29 patients were eligible to participate in the trial during 20 months of screening. Five parents and 2 patients declined to participate.

The remaining 22 patients who agreed to participate accounted for a 75.9% enrollment rate. Twenty of them (90.9%) participated at the first data time point, which was at the time of enrollment, and 77.3% participated 3 weeks later at time point 2.

The authors noted that refusals to enroll were more likely to come from parents (17.2%) than the eligible patients (8.3%).

And refusals only occurred when the self-report measures were not embedded in the clinical trial.

Of the 10 protocols represented, 7 patients were enrolled on the same protocol in which the PRO measures were embedded.

The researchers administered the 6-item short-form measures for the scales of Mobility, Pain, Fatigue, Depressive Symptoms, Anxiety, and Peer Relationships.

They asked the 4 open-ended questions—concerning QOL while receiving therapy and acceptability of the patient reporting—at time point 2.

At time point 1, 3 patients did not complete 3 PROMIS measures, for a person-missing rate of 15% and a measure-missing rate of 3.3%.

At the second time point, 2 patients did not complete 1 measure each, for a person-missing rate of 11.8% and a measure-missing rate of 2%.

All but one measure at time point 1 met the reliability criterion and all measures did so at time point 2.

The research team believes their findings support the feasibility and acceptability of completing quantitative and qualitative measures regarding symptom, function, and QOL experiences among children and adolescents with incurable cancer.

The researchers note the small study size and the number of parent refusals are limitations of the trial.

Nevertheless, they recommend embedding PROs in future pediatric oncology phase 1/2 trials. 

Photo by Rhoda Baer

A small study of 20 children aged 8 to 18 years with incurable or refractory cancers indicates children are reliable reporters of their symptoms and side effects.

The investigators collected reports from the children, who were enrolled on phase 1/2 clinical trials at 4 cancer centers and undergoing their first courses of chemotherapy.

The team assessed the feasibility and acceptability of collecting symptom, function, and quality of life (QOL) reports from the study participants.

The investigators also evaluated the measurement tool and interview questions at 2 time points.

They contend the youths’ self-reports potentially could be a new trial endpoint.

According to the investigators, only rarely do patient-reported outcomes (PROs) get incorporated into pediatric phase 1 or phase 2 trials.

And because these trials contribute to drug indications and labeling, the researchers decided to assess whether it was feasible to enroll young people and retain them in a PRO endeavor.

The researchers also assessed the reliability, validity, responsiveness, and range of the pediatric measures employed. They used the Patient-Reported Outcomes Measurement Information System (PROMIS) to capture statistically significant and clinically meaningful changes or minimally important differences (MIDs) in PROs.

Pamela S. Hinds, PhD, RN, of George Washington University in Washington, DC,  reported the findings on behalf of the Children's National Health System researchers in Cancer, the journal of the American Cancer Society.

"When experimental cancer drugs are studied, researchers collect details about how these promising therapies affect children's organs, but rarely do they ask the children themselves about symptoms they feel or the side effects they experience," Dr Hinds said.

"Without this crucial information, the full impact of the experimental treatment on the pediatric patient is likely underreported and clinicians are hobbled in their ability to effectively manage side effects," she added.

The team recruited children and adolescents enrolled in phase 1 safety or phase 2 efficacy trials at Children's National, Seattle Children's Hospital, Children's Hospital of Philadelphia, and Boston Children's Hospital.

Findings

Sixty percent of the participants were male and 70% were white.

Median age of the participants was 13.6 years: 7 (35%) were age 8 to 12, and 13 (65%) were 13 to 17.

Thirteen participants (65%) had solid tumors, 5 (25%) had brain tumors, and 2 (10%) had lymphoma.

A total of 29 patients were eligible to participate in the trial during 20 months of screening. Five parents and 2 patients declined to participate.

The remaining 22 patients who agreed to participate accounted for a 75.9% enrollment rate. Twenty of them (90.9%) participated at the first data time point, which was at the time of enrollment, and 77.3% participated 3 weeks later at time point 2.

The authors noted that refusals to enroll were more likely to come from parents (17.2%) than the eligible patients (8.3%).

And refusals only occurred when the self-report measures were not embedded in the clinical trial.

Of the 10 protocols represented, 7 patients were enrolled on the same protocol in which the PRO measures were embedded.

The researchers administered the 6-item short-form measures for the scales of Mobility, Pain, Fatigue, Depressive Symptoms, Anxiety, and Peer Relationships.

They asked the 4 open-ended questions—concerning QOL while receiving therapy and acceptability of the patient reporting—at time point 2.

At time point 1, 3 patients did not complete 3 PROMIS measures, for a person-missing rate of 15% and a measure-missing rate of 3.3%.

At the second time point, 2 patients did not complete 1 measure each, for a person-missing rate of 11.8% and a measure-missing rate of 2%.

All but one measure at time point 1 met the reliability criterion and all measures did so at time point 2.

The research team believes their findings support the feasibility and acceptability of completing quantitative and qualitative measures regarding symptom, function, and QOL experiences among children and adolescents with incurable cancer.

The researchers note the small study size and the number of parent refusals are limitations of the trial.

Nevertheless, they recommend embedding PROs in future pediatric oncology phase 1/2 trials. 

Photo by Rhoda Baer

A small study of 20 children aged 8 to 18 years with incurable or refractory cancers indicates children are reliable reporters of their symptoms and side effects.

The investigators collected reports from the children, who were enrolled on phase 1/2 clinical trials at 4 cancer centers and undergoing their first courses of chemotherapy.

The team assessed the feasibility and acceptability of collecting symptom, function, and quality of life (QOL) reports from the study participants.

The investigators also evaluated the measurement tool and interview questions at 2 time points.

They contend the youths’ self-reports potentially could be a new trial endpoint.

According to the investigators, only rarely do patient-reported outcomes (PROs) get incorporated into pediatric phase 1 or phase 2 trials.

And because these trials contribute to drug indications and labeling, the researchers decided to assess whether it was feasible to enroll young people and retain them in a PRO endeavor.

The researchers also assessed the reliability, validity, responsiveness, and range of the pediatric measures employed. They used the Patient-Reported Outcomes Measurement Information System (PROMIS) to capture statistically significant and clinically meaningful changes or minimally important differences (MIDs) in PROs.

Pamela S. Hinds, PhD, RN, of George Washington University in Washington, DC,  reported the findings on behalf of the Children's National Health System researchers in Cancer, the journal of the American Cancer Society.

"When experimental cancer drugs are studied, researchers collect details about how these promising therapies affect children's organs, but rarely do they ask the children themselves about symptoms they feel or the side effects they experience," Dr Hinds said.

"Without this crucial information, the full impact of the experimental treatment on the pediatric patient is likely underreported and clinicians are hobbled in their ability to effectively manage side effects," she added.

The team recruited children and adolescents enrolled in phase 1 safety or phase 2 efficacy trials at Children's National, Seattle Children's Hospital, Children's Hospital of Philadelphia, and Boston Children's Hospital.

Findings

Sixty percent of the participants were male and 70% were white.

Median age of the participants was 13.6 years: 7 (35%) were age 8 to 12, and 13 (65%) were 13 to 17.

Thirteen participants (65%) had solid tumors, 5 (25%) had brain tumors, and 2 (10%) had lymphoma.

A total of 29 patients were eligible to participate in the trial during 20 months of screening. Five parents and 2 patients declined to participate.

The remaining 22 patients who agreed to participate accounted for a 75.9% enrollment rate. Twenty of them (90.9%) participated at the first data time point, which was at the time of enrollment, and 77.3% participated 3 weeks later at time point 2.

The authors noted that refusals to enroll were more likely to come from parents (17.2%) than the eligible patients (8.3%).

And refusals only occurred when the self-report measures were not embedded in the clinical trial.

Of the 10 protocols represented, 7 patients were enrolled on the same protocol in which the PRO measures were embedded.

The researchers administered the 6-item short-form measures for the scales of Mobility, Pain, Fatigue, Depressive Symptoms, Anxiety, and Peer Relationships.

They asked the 4 open-ended questions—concerning QOL while receiving therapy and acceptability of the patient reporting—at time point 2.

At time point 1, 3 patients did not complete 3 PROMIS measures, for a person-missing rate of 15% and a measure-missing rate of 3.3%.

At the second time point, 2 patients did not complete 1 measure each, for a person-missing rate of 11.8% and a measure-missing rate of 2%.

All but one measure at time point 1 met the reliability criterion and all measures did so at time point 2.

The research team believes their findings support the feasibility and acceptability of completing quantitative and qualitative measures regarding symptom, function, and QOL experiences among children and adolescents with incurable cancer.

The researchers note the small study size and the number of parent refusals are limitations of the trial.

Nevertheless, they recommend embedding PROs in future pediatric oncology phase 1/2 trials. 

Image by Mae Melvin

A single dose of tafenoquine, when given with chloroquine, can significantly reduce the risk of relapse in patients with Plasmodium vivax malaria compared to placebo, as demonstrated by the results of 2 phase 3 studies.

Patients who have had P vivax malaria, even a single infection, can relapse several weeks or even years after the initial occurrence.

Results of the studies were presented at the 6^th International Conference on Plasmodium vivax Research (ICPVR) in Manaus, Brazil.

Tafenoquine, an 8-aminoquinoline derivative, is being developed by GlaxoSmithKline (GSK) in collaboration with Medicines for Malaria Venture (MMV).

“One of the greatest challenges for patients with P vivax malaria,” Patrick Vallance, of GSK, said, “is preventing relapses.”

“Being able to treat patients with a single dose of medicine would be an important step forward in ensuring efficacious treatment,” Vallance noted, “thereby reducing the risk of relapse, particularly in areas with very limited healthcare infrastructure.”

The DETECTIVE and GATHER studies were conducted in malaria-endemic countries in South America, Asia, and Africa.

DETECTIVE (TAF112582) study

This was a double-blind, double-dummy phase 3 study evaluating the efficacy, safety, and tolerability of tafenoquine in 522 patients aged 16 years or older with P vivax malaria.

Patients were randomized to receive placebo, a single dose of 300 mg tafenoquine, or primaquine at 15 mg daily for 14 days in a 1:2:1 ratio.

All patients received a 3-day course of chloroquine to treat the acute blood stage infection.

The study met its primary endpoint. A statistically significant greater proportion of patients treated with tafenoquine (60%) remained relapse-free over the 6-month follow-up period than patients on placebo (26%).  The odds ratio for risk of relapse vs placebo given with chloroquine was 0.24, P<0.001.

Treatment with 14 days of primaquine also achieved a statistically significant improvement in relapse-free follow-up, with an odds ratio vs placebo when given with chloroquine of 0.20, P<0.001.

The frequency of adverse events was 63% for the tafenoquine group, 59% for the primaquine group, and 65% for the chloroquine group.

And the frequency of serious adverse events was 8% for the tafenoquine group, 3% for the primaquine group, and 5% for the chloroquine group.

GATHER (TAF116564) study

 This study evaluated a single dose of 300 mg tafenoquine on hemoglobin levels compared to a 14-day course of 15 mg primaquine.

Agents in the 8-aminoquinoline drug class are associated with hemolytic anemia in individuals with inherited glucose-6-phosphate dehydrogenase (G6PD) deficiency.

All patients were screened for G6PD deficiency at baseline. Males with G6PD activity of at least 70% of the site median and females with 40% were eligible.

All 251 patients also received the standard 3-day course of chloroquine.

The incidence of decline in hemoglobin was low and similar between the 2 treatment arms, 2.4% for the tafenoquine group and 1.2% for the chloroquine group.

No patient required a blood transfusion.

The companies plan to develop a point-of-care diagnostic for G6PD as a mandatory test prior to treatment with tafenoquine.

“The positive results of the phase 3 trials for single-dose tafenoquine provide great hope that a new, effective drug to stop the relapse of P vivax malaria is in sight,” David Reddy, of MMV, affirmed.

Tafenoquine currently is not approved for use anywhere in the world. GSK plans to submit regulatory filings later in 2017. 

Image by Mae Melvin

A single dose of tafenoquine, when given with chloroquine, can significantly reduce the risk of relapse in patients with Plasmodium vivax malaria compared to placebo, as demonstrated by the results of 2 phase 3 studies.

Patients who have had P vivax malaria, even a single infection, can relapse several weeks or even years after the initial occurrence.

Results of the studies were presented at the 6^th International Conference on Plasmodium vivax Research (ICPVR) in Manaus, Brazil.

Tafenoquine, an 8-aminoquinoline derivative, is being developed by GlaxoSmithKline (GSK) in collaboration with Medicines for Malaria Venture (MMV).

“One of the greatest challenges for patients with P vivax malaria,” Patrick Vallance, of GSK, said, “is preventing relapses.”

“Being able to treat patients with a single dose of medicine would be an important step forward in ensuring efficacious treatment,” Vallance noted, “thereby reducing the risk of relapse, particularly in areas with very limited healthcare infrastructure.”

The DETECTIVE and GATHER studies were conducted in malaria-endemic countries in South America, Asia, and Africa.

DETECTIVE (TAF112582) study

This was a double-blind, double-dummy phase 3 study evaluating the efficacy, safety, and tolerability of tafenoquine in 522 patients aged 16 years or older with P vivax malaria.

Patients were randomized to receive placebo, a single dose of 300 mg tafenoquine, or primaquine at 15 mg daily for 14 days in a 1:2:1 ratio.

All patients received a 3-day course of chloroquine to treat the acute blood stage infection.

The study met its primary endpoint. A statistically significant greater proportion of patients treated with tafenoquine (60%) remained relapse-free over the 6-month follow-up period than patients on placebo (26%).  The odds ratio for risk of relapse vs placebo given with chloroquine was 0.24, P<0.001.

Treatment with 14 days of primaquine also achieved a statistically significant improvement in relapse-free follow-up, with an odds ratio vs placebo when given with chloroquine of 0.20, P<0.001.

The frequency of adverse events was 63% for the tafenoquine group, 59% for the primaquine group, and 65% for the chloroquine group.

And the frequency of serious adverse events was 8% for the tafenoquine group, 3% for the primaquine group, and 5% for the chloroquine group.

GATHER (TAF116564) study

 This study evaluated a single dose of 300 mg tafenoquine on hemoglobin levels compared to a 14-day course of 15 mg primaquine.

Agents in the 8-aminoquinoline drug class are associated with hemolytic anemia in individuals with inherited glucose-6-phosphate dehydrogenase (G6PD) deficiency.

All patients were screened for G6PD deficiency at baseline. Males with G6PD activity of at least 70% of the site median and females with 40% were eligible.

All 251 patients also received the standard 3-day course of chloroquine.

The incidence of decline in hemoglobin was low and similar between the 2 treatment arms, 2.4% for the tafenoquine group and 1.2% for the chloroquine group.

No patient required a blood transfusion.

The companies plan to develop a point-of-care diagnostic for G6PD as a mandatory test prior to treatment with tafenoquine.

“The positive results of the phase 3 trials for single-dose tafenoquine provide great hope that a new, effective drug to stop the relapse of P vivax malaria is in sight,” David Reddy, of MMV, affirmed.

Tafenoquine currently is not approved for use anywhere in the world. GSK plans to submit regulatory filings later in 2017. 

Image by Mae Melvin

A single dose of tafenoquine, when given with chloroquine, can significantly reduce the risk of relapse in patients with Plasmodium vivax malaria compared to placebo, as demonstrated by the results of 2 phase 3 studies.

Patients who have had P vivax malaria, even a single infection, can relapse several weeks or even years after the initial occurrence.

Results of the studies were presented at the 6^th International Conference on Plasmodium vivax Research (ICPVR) in Manaus, Brazil.

Tafenoquine, an 8-aminoquinoline derivative, is being developed by GlaxoSmithKline (GSK) in collaboration with Medicines for Malaria Venture (MMV).

“One of the greatest challenges for patients with P vivax malaria,” Patrick Vallance, of GSK, said, “is preventing relapses.”

“Being able to treat patients with a single dose of medicine would be an important step forward in ensuring efficacious treatment,” Vallance noted, “thereby reducing the risk of relapse, particularly in areas with very limited healthcare infrastructure.”

The DETECTIVE and GATHER studies were conducted in malaria-endemic countries in South America, Asia, and Africa.

DETECTIVE (TAF112582) study

This was a double-blind, double-dummy phase 3 study evaluating the efficacy, safety, and tolerability of tafenoquine in 522 patients aged 16 years or older with P vivax malaria.

Patients were randomized to receive placebo, a single dose of 300 mg tafenoquine, or primaquine at 15 mg daily for 14 days in a 1:2:1 ratio.

All patients received a 3-day course of chloroquine to treat the acute blood stage infection.

The study met its primary endpoint. A statistically significant greater proportion of patients treated with tafenoquine (60%) remained relapse-free over the 6-month follow-up period than patients on placebo (26%).  The odds ratio for risk of relapse vs placebo given with chloroquine was 0.24, P<0.001.

Treatment with 14 days of primaquine also achieved a statistically significant improvement in relapse-free follow-up, with an odds ratio vs placebo when given with chloroquine of 0.20, P<0.001.

The frequency of adverse events was 63% for the tafenoquine group, 59% for the primaquine group, and 65% for the chloroquine group.

And the frequency of serious adverse events was 8% for the tafenoquine group, 3% for the primaquine group, and 5% for the chloroquine group.

GATHER (TAF116564) study

 This study evaluated a single dose of 300 mg tafenoquine on hemoglobin levels compared to a 14-day course of 15 mg primaquine.

Agents in the 8-aminoquinoline drug class are associated with hemolytic anemia in individuals with inherited glucose-6-phosphate dehydrogenase (G6PD) deficiency.

All patients were screened for G6PD deficiency at baseline. Males with G6PD activity of at least 70% of the site median and females with 40% were eligible.

All 251 patients also received the standard 3-day course of chloroquine.

The incidence of decline in hemoglobin was low and similar between the 2 treatment arms, 2.4% for the tafenoquine group and 1.2% for the chloroquine group.

No patient required a blood transfusion.

The companies plan to develop a point-of-care diagnostic for G6PD as a mandatory test prior to treatment with tafenoquine.

“The positive results of the phase 3 trials for single-dose tafenoquine provide great hope that a new, effective drug to stop the relapse of P vivax malaria is in sight,” David Reddy, of MMV, affirmed.

Tafenoquine currently is not approved for use anywhere in the world. GSK plans to submit regulatory filings later in 2017. 

Photo courtesy of FDA

The US Food and Drug Administration (FDA) has accepted a new drug application (NDA) for the use of fostamatinib disodium (Tavalisse™) in the treatment of patients with chronic/persistent immune thrombocytopenia (ITP).

Fostamatinib is an oral spleen tyrosine kinase (SYK) inhibitor that investigators believe may address an underlying autoimmune cause of ITP by impeding platelet destruction.

Rigel Pharmaceuticals, the drug’s developer, anticipates an action date by the FDA of April 17, 2018.

The FDA previously granted fostamatinib orphan drug designation.

Data from 3 clinical studies support the new drug application. Study 047 and 048 were randomized placebo-controlled trials, and study 049 was an open-label extension study.

Together with an initial proof of concept study, the application included data on 163 ITP patients. Fostamatinib has been evaluated in over 4,600 individuals across all indications.

The patients enrolled in studies 047 and 048 had been diagnosed with persistent or chronic ITP, had failed at least 1 prior therapy for ITP, and had platelet counts consistently below 30,000/uL.

In both studies, patients were randomized in a 2:1 ratio to receive either fostamatinib or placebo orally twice a day for up to 24 weeks.

Study 047

In this study, 51 patients were randomized to fostamatinib and 25 to placebo.

The median platelet counts at baseline were 15,000/uL and 16,000/uL in the fostamatinib and placebo arms, respectively.

The median age was 57 in both treatment arms. The duration of ITP was 7.5 years (range, 0.6-53) in the fostamatinib arm and 5.5 years (range, 0.4-45) in the placebo arm.

The primary efficacy endpoint in both study 047 and 048 was a stable platelet response, defined as achieving platelet counts greater than 50,000/uL for at least 4 of the 6 scheduled clinic visits between weeks 14 and 24 of treatment.

In study 047, the rate of stable platelet response was significantly higher in the fostamatinib arm than the placebo arm—18% (n=9) and 0%, respectively (P=0.026).

Study 048

 Fifty patients were randomized to fostamatinib and 24 to placebo.

Patients’ median platelet counts at baseline were 16,000/uL and 21,000/uL in the fostamatinib and placebo arms, respectively.

The median age was 50 in both treatment arms. The duration of ITP was 8.8 years (range, 0.3-50) in the fostamatinib arm and 10.8 years (range, 0.9-29) in the placebo arm.

In this study, however, the difference in stable platelet response between the 2 arms was not significant—18% (n=9) and 4% (n=1), respectively (P=0.152).

However, when the data from study 047 and 048 were combined, the response rate was significantly higher in the fostamatinib arm than the placebo arm—18% (18/101) and 2% (1/49), respectively (P=0.007).

"The FDA acceptance for filing of our NDA is an exciting milestone for Rigel," Raul Rodriguez, Rigel's president and chief executive officer, said.

The approval of fostamatinib “will provide a new treatment option for patients with chronic or persistent ITP,” he affirmed. “We look forward to working closely with the FDA as they review our submission." 

Photo courtesy of FDA

The US Food and Drug Administration (FDA) has accepted a new drug application (NDA) for the use of fostamatinib disodium (Tavalisse™) in the treatment of patients with chronic/persistent immune thrombocytopenia (ITP).

Fostamatinib is an oral spleen tyrosine kinase (SYK) inhibitor that investigators believe may address an underlying autoimmune cause of ITP by impeding platelet destruction.

Rigel Pharmaceuticals, the drug’s developer, anticipates an action date by the FDA of April 17, 2018.

The FDA previously granted fostamatinib orphan drug designation.

Data from 3 clinical studies support the new drug application. Study 047 and 048 were randomized placebo-controlled trials, and study 049 was an open-label extension study.

Together with an initial proof of concept study, the application included data on 163 ITP patients. Fostamatinib has been evaluated in over 4,600 individuals across all indications.

The patients enrolled in studies 047 and 048 had been diagnosed with persistent or chronic ITP, had failed at least 1 prior therapy for ITP, and had platelet counts consistently below 30,000/uL.

In both studies, patients were randomized in a 2:1 ratio to receive either fostamatinib or placebo orally twice a day for up to 24 weeks.

Study 047

In this study, 51 patients were randomized to fostamatinib and 25 to placebo.

The median platelet counts at baseline were 15,000/uL and 16,000/uL in the fostamatinib and placebo arms, respectively.

The median age was 57 in both treatment arms. The duration of ITP was 7.5 years (range, 0.6-53) in the fostamatinib arm and 5.5 years (range, 0.4-45) in the placebo arm.

The primary efficacy endpoint in both study 047 and 048 was a stable platelet response, defined as achieving platelet counts greater than 50,000/uL for at least 4 of the 6 scheduled clinic visits between weeks 14 and 24 of treatment.

In study 047, the rate of stable platelet response was significantly higher in the fostamatinib arm than the placebo arm—18% (n=9) and 0%, respectively (P=0.026).

Study 048

 Fifty patients were randomized to fostamatinib and 24 to placebo.

Patients’ median platelet counts at baseline were 16,000/uL and 21,000/uL in the fostamatinib and placebo arms, respectively.

The median age was 50 in both treatment arms. The duration of ITP was 8.8 years (range, 0.3-50) in the fostamatinib arm and 10.8 years (range, 0.9-29) in the placebo arm.

In this study, however, the difference in stable platelet response between the 2 arms was not significant—18% (n=9) and 4% (n=1), respectively (P=0.152).

However, when the data from study 047 and 048 were combined, the response rate was significantly higher in the fostamatinib arm than the placebo arm—18% (18/101) and 2% (1/49), respectively (P=0.007).

"The FDA acceptance for filing of our NDA is an exciting milestone for Rigel," Raul Rodriguez, Rigel's president and chief executive officer, said.

The approval of fostamatinib “will provide a new treatment option for patients with chronic or persistent ITP,” he affirmed. “We look forward to working closely with the FDA as they review our submission." 

Photo courtesy of FDA

The US Food and Drug Administration (FDA) has accepted a new drug application (NDA) for the use of fostamatinib disodium (Tavalisse™) in the treatment of patients with chronic/persistent immune thrombocytopenia (ITP).

Fostamatinib is an oral spleen tyrosine kinase (SYK) inhibitor that investigators believe may address an underlying autoimmune cause of ITP by impeding platelet destruction.

Rigel Pharmaceuticals, the drug’s developer, anticipates an action date by the FDA of April 17, 2018.

The FDA previously granted fostamatinib orphan drug designation.

Data from 3 clinical studies support the new drug application. Study 047 and 048 were randomized placebo-controlled trials, and study 049 was an open-label extension study.

Together with an initial proof of concept study, the application included data on 163 ITP patients. Fostamatinib has been evaluated in over 4,600 individuals across all indications.

The patients enrolled in studies 047 and 048 had been diagnosed with persistent or chronic ITP, had failed at least 1 prior therapy for ITP, and had platelet counts consistently below 30,000/uL.

In both studies, patients were randomized in a 2:1 ratio to receive either fostamatinib or placebo orally twice a day for up to 24 weeks.

Study 047

In this study, 51 patients were randomized to fostamatinib and 25 to placebo.

The median platelet counts at baseline were 15,000/uL and 16,000/uL in the fostamatinib and placebo arms, respectively.

The median age was 57 in both treatment arms. The duration of ITP was 7.5 years (range, 0.6-53) in the fostamatinib arm and 5.5 years (range, 0.4-45) in the placebo arm.

The primary efficacy endpoint in both study 047 and 048 was a stable platelet response, defined as achieving platelet counts greater than 50,000/uL for at least 4 of the 6 scheduled clinic visits between weeks 14 and 24 of treatment.

In study 047, the rate of stable platelet response was significantly higher in the fostamatinib arm than the placebo arm—18% (n=9) and 0%, respectively (P=0.026).

Study 048

 Fifty patients were randomized to fostamatinib and 24 to placebo.

Patients’ median platelet counts at baseline were 16,000/uL and 21,000/uL in the fostamatinib and placebo arms, respectively.

The median age was 50 in both treatment arms. The duration of ITP was 8.8 years (range, 0.3-50) in the fostamatinib arm and 10.8 years (range, 0.9-29) in the placebo arm.

In this study, however, the difference in stable platelet response between the 2 arms was not significant—18% (n=9) and 4% (n=1), respectively (P=0.152).

However, when the data from study 047 and 048 were combined, the response rate was significantly higher in the fostamatinib arm than the placebo arm—18% (18/101) and 2% (1/49), respectively (P=0.007).

"The FDA acceptance for filing of our NDA is an exciting milestone for Rigel," Raul Rodriguez, Rigel's president and chief executive officer, said.

The approval of fostamatinib “will provide a new treatment option for patients with chronic or persistent ITP,” he affirmed. “We look forward to working closely with the FDA as they review our submission." 

AML cells

Update as of June 21:  The US Food and Drug Administration (FDA) has placed the Investigational New Drug (IND) application for vadastuximab talirine on hold. No clinical trial may resume under the IND until the FDA lifts the clinical hold.

On the advice of the Independent Data Monitoring Committee, Seattle Genetics is discontinuing the phase 3 CASCADE clinical trial of vadastuximab talirine as frontline treatment in older patients with acute myeloid leukemia (AML).

The company is also suspending patient enrollment and treatment in all its vadastuximab trials, including the ongoing phase 1/2 trial in frontline high-risk myelodysplastic syndromes (MDS).

In December last year, the US Food and Drug Administration (FDA) had placed the trials of vadastuximab on full and partial clinical holds due to the potential risk of hepatotoxicity.

The FDA lifted the hold in March of this year. However, concerns regarding a higher rate of deaths, including fatal infections but not liver toxicity, in the vadastuximab arm compared to control prompted the company to discontinue the phase 3 trial.

Vadastuximab talirene is an antibody-drug conjugate (ADC) targeted to CD33, which is expressed on most AML and MDS blasts. The ADC technology links anti-cancer compounds with targeting antibodies to precisely kill cancer cells and spare healthy ones.

Seattle Genetics’ ADC for Hodgkin lymphoma, brentuximab vedotin, was granted accelerated approval by the FDA in 2011.

The CASCADE trial was evaluating vadastuximab in combination with the hypomethylating agents (HMAs) azacytidine or decitabine compared to an HMA alone in older patients with newly diagnosed AML.

In addition to the MDS trial, the company is stopping enrollment onto the trial of vadastuximab in combination with 7+3 chemotherapy in newly diagnosed, younger AML patients and vadastuximab given prior to or after allogeneic hematopoietic stem cell transplant in AML patients.

Calling the decision “disappointing and unexpected,” Clay Siegall, PhD, president and CEO of Seattle Genetics, said, “Patient safety is our highest priority, and we will closely review the data and evaluate next steps.” 

AML cells

Update as of June 21:  The US Food and Drug Administration (FDA) has placed the Investigational New Drug (IND) application for vadastuximab talirine on hold. No clinical trial may resume under the IND until the FDA lifts the clinical hold.

On the advice of the Independent Data Monitoring Committee, Seattle Genetics is discontinuing the phase 3 CASCADE clinical trial of vadastuximab talirine as frontline treatment in older patients with acute myeloid leukemia (AML).

The company is also suspending patient enrollment and treatment in all its vadastuximab trials, including the ongoing phase 1/2 trial in frontline high-risk myelodysplastic syndromes (MDS).

In December last year, the US Food and Drug Administration (FDA) had placed the trials of vadastuximab on full and partial clinical holds due to the potential risk of hepatotoxicity.

The FDA lifted the hold in March of this year. However, concerns regarding a higher rate of deaths, including fatal infections but not liver toxicity, in the vadastuximab arm compared to control prompted the company to discontinue the phase 3 trial.

Vadastuximab talirene is an antibody-drug conjugate (ADC) targeted to CD33, which is expressed on most AML and MDS blasts. The ADC technology links anti-cancer compounds with targeting antibodies to precisely kill cancer cells and spare healthy ones.

Seattle Genetics’ ADC for Hodgkin lymphoma, brentuximab vedotin, was granted accelerated approval by the FDA in 2011.

The CASCADE trial was evaluating vadastuximab in combination with the hypomethylating agents (HMAs) azacytidine or decitabine compared to an HMA alone in older patients with newly diagnosed AML.

In addition to the MDS trial, the company is stopping enrollment onto the trial of vadastuximab in combination with 7+3 chemotherapy in newly diagnosed, younger AML patients and vadastuximab given prior to or after allogeneic hematopoietic stem cell transplant in AML patients.

Calling the decision “disappointing and unexpected,” Clay Siegall, PhD, president and CEO of Seattle Genetics, said, “Patient safety is our highest priority, and we will closely review the data and evaluate next steps.” 

AML cells

Update as of June 21:  The US Food and Drug Administration (FDA) has placed the Investigational New Drug (IND) application for vadastuximab talirine on hold. No clinical trial may resume under the IND until the FDA lifts the clinical hold.

On the advice of the Independent Data Monitoring Committee, Seattle Genetics is discontinuing the phase 3 CASCADE clinical trial of vadastuximab talirine as frontline treatment in older patients with acute myeloid leukemia (AML).

The company is also suspending patient enrollment and treatment in all its vadastuximab trials, including the ongoing phase 1/2 trial in frontline high-risk myelodysplastic syndromes (MDS).

In December last year, the US Food and Drug Administration (FDA) had placed the trials of vadastuximab on full and partial clinical holds due to the potential risk of hepatotoxicity.

The FDA lifted the hold in March of this year. However, concerns regarding a higher rate of deaths, including fatal infections but not liver toxicity, in the vadastuximab arm compared to control prompted the company to discontinue the phase 3 trial.

Vadastuximab talirene is an antibody-drug conjugate (ADC) targeted to CD33, which is expressed on most AML and MDS blasts. The ADC technology links anti-cancer compounds with targeting antibodies to precisely kill cancer cells and spare healthy ones.

Seattle Genetics’ ADC for Hodgkin lymphoma, brentuximab vedotin, was granted accelerated approval by the FDA in 2011.

The CASCADE trial was evaluating vadastuximab in combination with the hypomethylating agents (HMAs) azacytidine or decitabine compared to an HMA alone in older patients with newly diagnosed AML.

In addition to the MDS trial, the company is stopping enrollment onto the trial of vadastuximab in combination with 7+3 chemotherapy in newly diagnosed, younger AML patients and vadastuximab given prior to or after allogeneic hematopoietic stem cell transplant in AML patients.

Calling the decision “disappointing and unexpected,” Clay Siegall, PhD, president and CEO of Seattle Genetics, said, “Patient safety is our highest priority, and we will closely review the data and evaluate next steps.”