The strife-marked Duchenne muscular dystrophy (DMD) space drew forth another outspoken political figure in the shape of Sen. Ron Johnson (R-Wisc.), who said he was “enraged” by the U.S. FDA’s refusal to consider PTC Therapeutics Inc.’s Translarna (ataluren) for the treatment of nonsense mutation disease.

PTC Therapeutics Inc. CEO Matthew Klein said the firm “achieved all we set out to [achieve] in phase II” with PTC-518 in Huntington’s disease (HD), but it wasn’t enough to excite Wall Street, as some questioned whether the level of associations between trial findings and efficacy would appease the U.S. FDA. Shares (NASDAQ:PTCT) ended May 5 at $40.65, down $9.30, or 18.6%. Warren, N.J.-based PTC rolled out the most recent data from the Pivot-HD effort in stage 2 and stage 3 HD with PTC-518, an oral, centrally as well as peripherally distributed huntingtin (HTT) pre-mRNA splicing modifier.

PTC Therapeutics Inc. said a “highly competitive process with several parties involved” led to the deal centered on the firm’s Huntington’s disease program with Novartis AG, an arrangement that brings $1 billion up front along with as much as $1.9 billion in development, regulatory, and sales milestone rewards.

PTC Therapeutics Inc.’s accelerated go-ahead from the U.S. FDA for Kebilidi (eladocagene exuparvovec-tneq), a recombinant adeno-associated virus serotype 2-based gene therapy to treat aromatic L-amino acid decarboxylase (AADC) deficiency, came with a priority review voucher (PRV) that the company intends to monetize.

As an array of developers push their Friedreich’s ataxia (FA) drugs along, PTC Therapeutics Inc.’s recent update on its program piqued thirst for the 15-lipoxygenase inhibitor vatiquinone. Warren, N.J.-based PTC said the prespecified endpoint for two different FA long-term extension studies was met, with highly statistically significant evidence of durable treatment benefit on disease progression.