Sarepta Therapeutics said Monday that its gene therapy improved muscle function for a group of patients with Duchenne muscular dystrophy — updated results from a mid-stage study the company believes ameliorates an initial negative outcome last year and might support accelerated approval.
But the magnitude of the benefit shown by Sarepta’s one-time treatment was lower than some investors hoped to see. That concern, coupled with weaker financial guidance for the year, caused Sarepta’s stock price to drop.
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