BioMarin Refiles BLA for Hemophilia Gene Therapy
BioMarin has resubmitted its BLA for gene therapy valoctocogene roxaparvovec for adults with severe hemophilia A. The resubmission includes the company’s response to a 2020 complete response letter and subsequent agency feedback, including two-year outcomes data from the global GENEr8-1 Phase 3 study and supportive data from five years of follow-up from the ongoing Phase 1/2 dose escalation study, BioMarin says.
Although the submission would typically be reviewed in six months, the company says it expects an additional three months may be added to the review “based on the number of data read-outs that will emerge during the procedure.”
FDA's 8/2020 complete response letter requested two years of data from the Phase 3 study to provide evidence of a durable effect using annualized bleeding rate as the primary endpoint. “Based on recent feedback received from the FDA related to BioMarin’s plans for the upcoming BLA, the agency has requested additional information and analyses of data to be included in the BLA prior to submission,” the company said in May. While the agency has not requested additional pre-clinical or clinical studies, according to the company, data on three years after dosing will become available during the expected BLA review.