Stoke Therapeutics Inc.’s speeded-up timeline for zorevunersen, the antisense oligonucleotide in development with Biogen Inc. as a first-in-class potential disease-modifying treatment for Dravet syndrome, put the rare, severe form of lifelong epilepsy in the spotlight. The news involved completion of enrollment and a phase III data readout from the Emperor study, as officials said signups of 150 patients are expected in the second quarter of the year, which puts the study on track for data in mid-2027.
Coming on the heels of an advisory committee in which the U.S. FDA and its independent advisers grappled with trying to fit an ultra-rare disease development program into the confines of the agency’s “significant evidence” requirements, an Oct. 16 public meeting on a Rare Disease Innovation Hub the agency is setting up seemed like a welcome step in the right direction for rare disease patients, their caregivers and companies working in the space.
Updated results from Stoke Therapeutics Inc.’s studies of antisense oligonucleotide STK-001 showed a reduced convulsion seizure frequency in those ages 2 to 18 with Dravet syndrome. The new data, which also showed improved cognition and behavior in participants, substantially boosted the company’s stock value and caused analysts to applaud.
Stoke Therapeutics Inc.’s stock tumbled 32% after the company reported phase I/IIa data of its antisense oligonucleotide, STK-001, in Dravet syndrome, showing it reduced convulsive seizures in children most consistently at the highest dose, with benefits increasing as time progressed.
Stoke Therapeutics Inc. has received clinical trial application (CTA) clearance from the U.K.’s Medicines and Healthcare products Regulatory Agency (MHRA) to initiate a phase I/II study (OSPREY) of STK-002 for the treatment of autosomal dominant optic atrophy (ADOA).
As Wall Street waits to find out later this year whether Stoke Therapeutics Inc.’s positive results with a low, single dose of STK-001 for Dravet syndrome pans out in more extensive research, a number of players large and small are investigating candidates for the rare but dismal form of epilepsy.
A raft of potentially high-value drug development collaborations, most for gene and RNA therapies, led the first day of the 40th Annual J.P. Morgan Healthcare Conference Monday. Pfizer Inc. enlisted Beam Therapeutic Inc. to advance in vivo base editing programs for up to $1.35 billion, while Bayer AG tapped Mammoth Biosciences Inc.’s in vivo CRISPR systems expertise in a potential $1 billion-plus deal. Selecta Biosciences Inc. inked a new $1.1 billion partnership with Ginkgo Bioworks Inc. to develop next-generation gene therapy capsids, while Acadia Pharmaceuticals Inc. agreed to pay Stoke Therapeutics Inc. as much as $967 million to develop RNA-based medicines. Work on new mRNA vaccines and therapies is also proceeding, with both Pfizer and Biontech SE announcing new collaborations in the space.
Stoke Therapeutics Inc. is marching ahead in the second half of this year with its phase I/IIa study with STK-001 in Dravet syndrome (DS), one of the more abysmal forms of epilepsy, although the FDA has temporarily hobbled part B of the test, pending preclinical data that will more fully characterize the safety profile of the antisense oligonucleotide (ASO).
