Pfizer Announces Positive Results from Hemophilia A and B Trial

Pfizer Inc. today announced their Phase 3 BASIS clinical trial evaluating marstacimab has met its primary endpoints, having demonstrated statically significant and clinically meaningful effects. Marstacimab, a novel, investigational anti-tissue factor pathway inhibitor (anti-TFPI) being studied for the treatment of hemophilia A or B for people without inhibitors to Factor VIII (FVIII) or Factor IX (FIX), was administered weekly with flat (not weight-based) dosing in the trial as a subcutaneous 300 mg loading dose followed by 150 mg once weekly.

“Despite significant treatment advances in recent years, many people living with hemophilia unfortunately continue to experience bleeding episodes and are required to manage their disease with frequent intravenous infusions,” said Chris Boshoff, M.D., Ph.D., Chief Development Officer, Oncology and Rare Disease, Pfizer Global Product Development. “These results support the potential for marstacimab to become the first once-weekly non-factor treatment for people with hemophilia B and a treatment option that helps address the diverse needs of patients with hemophilia A or B without inhibitors. These needs include preventing excessive or potentially life-threatening bleeds, while at the same time reducing the burden of treatment with once-weekly, subcutaneous administration.”

Read the full press release here. 

Source: Hemophilia Federation of America