FDA Rebuffs BioMarin BLA for Hemophilia Gene Therapy

FDA has issued an 8/18 complete response letter to BioMarin Pharmaceutical for its valoctocogene roxaparvovec gene therapy for severe hemophilia A. The company says the agency is now requesting two years of data from the ongoing Phase 3 study to provide evidence of a durable effect using annualized bleeding rate as the primary endpoint. BioMarin says the last patient enrolled in the study will complete two years of follow-up in 11/2021.

BioMarin says the valoctocogene roxaparvovec trials will continue while the company meets with FDA officials to discuss the next steps toward approval.

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