Solid Biosciences Inc.’s SGT-003 has been granted orphan drug designation by the FDA. The company’s next-generation Duchenne muscular dystrophy gene therapy candidate was also granted fast track designation last month.

“This is a tough business. It’s never a straight line from start to success.” Those words, from Exelixis Inc. CEO Michael Morrissey, during a presentation at the J.P. Morgan Healthcare Conference (JPM), could easily sum up any aspect of the biopharma industry. But with more biopharma firms than ever having reached commercial status, along with the introduction of new therapeutic modalities into the health care market, many are finding the toughest part comes after regulatory approval, whether it’s navigating a competitive landscape, getting payers and physicians on board, or satisfying regulators’ stringent postmarketing requirements. As industry players and observers head home after a busy week in San Francisco, BioWorld offers a brief glimpse at a few firms taking on those post-approval challenges in 2024.

With positive initial phase I/II data in hand from two trials, Dyne Therapeutics Inc. plans to report more findings and start enrolling registrational cohorts in both studies by the end of this year for DYNE-101 in myotonic dystrophy type 1 (DM1) and a study called Deliver with DYNE-251 in Duchenne muscular dystrophy (DMD) who are amenable to exon 51 skipping.

Satellos Bioscience Inc. has disclosed further information on its lead drug program in Duchenne muscular dystrophy.

Less than two weeks after getting a thumbs-up from the EMA’s Committee for Medicinal Products for Human Use, Santhera Pharmaceutical AG’s vamorolone secured U.S. FDA approval for use in patients, 2 and older, with Duchenne muscular dystrophy (DMD). A first-in-class drug, vamorolone, branded Agamree, is expected to offer a safer alternative to the steroid therapy, which the company has said will remain a foundational treatment of DMD, even with the introduction of gene therapies.

Duchenne muscular dystrophy (DMD) is a disorder characterized by progressive degeneration of muscles, resulting in muscle loss, mobility limitations and lately, mortal risk. DMD is caused by mutations in the dystrophin gene (DMD) and about 80% of these are suitable for exon skipping, obtaining a functional dystrophin protein.