Duchenne Drug Reviewer Farkas Leaves FDA for Parexel

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Investors and Duchenne muscular dystrophy patients and their families are cheering the departure of CDER Division of Neurology Products clinical team leader Ronald Farkas, who joined clinical research organization Parexel 9/9. Farkas was one of the harshest critics of Sarepta’s NDA for Duchenne drug eteplirsen during an April advisory committee meeting that voted 7 to 6 (see story) that the company did not provide substantial evidence from adequate and well controlled studies that the drug induces production of dystrophin to a level that is reasonably likely to predict clinical benefit in patients. It didn’t take Wall Street long to react to Farkas’ subsequent departure – Sarepta stock was up about 25% in mid-day trading Wednesday.

In June, the company agreed to an agency request that it provide dystrophin data, as measured by western blot, from biopsies already obtained from an ongoing confirmatory study of eteplirsen (PROMOVI), as part of its ongoing NDA evaluation. The company said at the time that it planned to submit data from 13 patient biopsy samples, at baseline and week 48, to the agency within a few weeks. In a statement, Sarepta said it expects this will “facilitate a prompt decision on the NDA by the agency.” Eteplirsen is designed to address the underlying cause of Duchenne’s by restoring the dystrophin messenger RNA (mRNA) reading frame, and enabling the production of a shorter, functional form of the dystrophin protein, according to the company. In May, FDA extended the user fee review goal to continue to sort through several data issues.

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