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Sarepta’s shares crashed 41% in premarket trading Monday morning to $21.01 after the biotech reported a second death from acute liver failure, a known side effect of adeno-associated virus-based gene therapies.

In the wake of multiple patient deaths from liver injuries related to Sarepta Therapeutics’ AAV gene therapy platform, some in the sector are looking for ways to improve the current technology, while others are eager to move on.

Sarepta’s troubles had nothing to do with Arrowhead’s assets, and yet both companies have seen their stock prices decline this past month. BioSpace caught up with Arrowhead’s Chris Anzalone to talk about the biotech’s role as an RNAi pipeline savior.

CBER is unanimously against Elevdiys’ return to the market without additional evidence, according to media reports citing an anonymous senior FDA official. Given Elevidys’ full approval, however, experts told BioSpace this path would set up a length legal battle between the regulator and Sarepta Therapeutics.

Sarepta Therapeutics’ stock has dropped precipitously as questions swirl around the safety of its gene therapies. Meanwhile, the Duchenne patient community fears losing access to Elevidys while the regulator considers more drastic action.

Sarepta and Capricor learned of key regulatory decisions from the media and investors, and Duchenne muscular dystrophy families have turned to the news for answers. Meanwhile, the FDA insists it remains committed to notifying companies of any regulatory action before sharing information with the media or public.

CBER Chief Vinay Prasad reclaimed his job less than two weeks after his mysterious exit; MAHA implementor Gray Delany is out after reportedly sparring with other agency officials over communications strategy; Eli Lilly’s first Phase III readout for oral obesity drug orforglipron missed analyst expectations; and Arrowhead Pharmaceuticals addresses the recent woes of its of partner Sarepta.

In light of recent patient deaths, the FDA has also revoked its platform designation for Sarepta’s AAVrh74 technology. The designation, granted last month, was the first of its kind to be announced publicly.

Sarepta Therapeutics faces serious FDA action after news broke of a third patient death, the FDA gets a new top drug regulator in George Tidmarsh, a handful of new drugs get turned away from the market and pharma companies continue to commit billions to reshoring manufacturing.

Sarepta did not hold an investor call for its second-quarter earnings report or provide an updated full-year revenue outlook.