FDA 3-Month Review Extension on Capricor Gene Therapy

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FDA has extended by three months its review of a Capricor Therapeutics BLA for Deramiocel, an investigational cell therapy for Duchenne muscular dystrophy (DMD). The new user fee review action target date is 11/22.

“As part of its ongoing discussions with the FDA following the July 2026 Advisory Committee meeting, Capricor submitted an amendment to the BLA that includes 24-month open-label extension data from its pivotal Phase 3 HOPE-3 study and additional robustness analyses, with a request that the FDA review the existing and new data in support of a refined proposed indication focused on upper limb function, the primary endpoint of HOPE-3,” the company says. CBER accepted the submission for review as a major amendment.

The proposed indication shift is in response to the advisory committee meeting in which members voted 9-3 against a finding that available evidence provided substantial evidence of effectiveness of deramiocel for treating cardiomyopathy in patients with DMD. The committee was asked specifically about the cardiomyopathy indication and was not asked to vote on the HOPE-3 primary endpoint or the overall benefit-risk profile of the therapy.

Capricor CEO Linda Marbán said 8/13 that the company believes the distinction is important because HOPE-3 was designed and powered around a skeletal-muscle endpoint, with upper-limb function as its primary efficacy measure. During the advisory committee meeting, discussion of the upper-limb data was more supportive, according to the company.

Deramiocel is described as an investigational, first-in-class allogeneic cell therapy designed to preserve cardiac and skeletal muscle function in patients with Duchenne muscular dystrophy, a rare and fatal genetic disease marked by progressive muscle degeneration. The therapy consists of cardiosphere-derived cells that act primarily through exosomes, which are believed to modulate immune responses and reduce fibrosis, the company says.

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