Pfizer Drops Hemophilia B Gene Therapy
Pfizer has decided to discontinue the marketing of its hemophilia B gene therapy Beqvez (fidanacogene elaparvovec-dzkt) due to limited patient and physician interest in the $3.5 million one-time treatment. The product is intended for treating adults with moderate to severe hemophilia B who currently use factor IX (FIX) prophylaxis therapy, or have current or historical life-threatening hemorrhage, or have repeated, serious spontaneous bleeding episodes. “Beqvez is a one-time treatment that is designed to enable people living with hemophilia B to produce FIX themselves rather than the current standard of care, which requires regular intravenous infusions of FIX that are often administered multiple times a week or multiple times a month,” the company said at the time of its 4/2024 approval.
The move to abandon Beqvez follows Pfizer’s December decision to pull out of a collaboration deal with Sangamo Therapeutics to develop giroctocogene fitelparvovec, an investigational gene therapy candidate for treating adults with moderately severe to severe hemophilia A. Last July the companies reported that their AFFINE trial achieved its primary objective of non-inferiority, as well as superiority, in total annualized bleeding rate (ABR) from Week 12 through at least 15 months of follow-up post-infusion compared with routine Factor VIII replacement prophylaxis treatment.