Sarepta’s DMD Gene Therapy Adcomm Likely To Focus On Dystrophin As A Surrogate Endpoint
Cellular, Tissue and Gene Therapies Advisory Committee will weigh whether the increase in dystrophin production seen with SRP-9001 is reasonably likely to predict clinical benefit in Duchenne muscular dystrophy, Sarepta says; agency had previously told the company a panel meeting would not be needed, but it reversed course late in the review.
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Only four of 14 voting panelists are regular members of the Cellular, Tissues and Gene Therapies Advisory Committee, with scheduling conflicts precluding participation by many others, the FDA said. Three of the temporary members are veterans of prior muscular dystrophy drug reviews.
Gene Therapies: US FDA Has Used Accelerated Approval Four Times Based On Intermediate Clinical Endpoints
Three of the accelerated approvals were for CAR-T products, a class that the agency considers to be gene therapies. The FDA’s September approval of bluebird bio’s Skysona for cerebral adrenoleukodystrophy was the lone non-cancer product in the group. Pink Sheet infographic tracks the required confirmatory studies and timelines for all four products.
The EMBARK trial’s availability to more patients likely contributed to the much quicker enrollment than confirmatory trials for Exondys 51, Vyondys 53 and Amondys 45, which also saw enrollment targets and eligibility ages change over the years.