Rare diseases

The antibody anselamimab, which AstraZeneca picked up in its 2021 purchase of Caelum Biosciences, failed to improve survival and reduce hospitalizations, but the company sees promise in data from an unspecified patient subgroup.

Around 3,500 FDA employees received termination emails; FDA Commissioner Marty Makary suggests lowering industry user fees and tying review times to drug prices; the regulator opens its trove of complete response letters in the name of transparency; and two companies receive rejections for rare disease therapies.

More than thirty years since its 1993 founding, Catherine Owen Adams and Elizabeth Thompson—the R&D combo that has led Acadia since last year—are managing two products on the market and a pipeline estimated to be worth an additional $12 billion in sales.

The FDA cited manufacturing issues but did not flag problems with Ultragenyx’s data package for UX111, with the biotech noting that the regulator found its neurodevelopmental findings for the gene therapy to be “robust.”

In its complete response letter, the FDA cited insufficient evidence establish deramiocel’s effectiveness for cardiomyopathy associated with Duchenne muscular dystrophy. The decision comes after CBER Director Vinay Prasad canceled an advisory committee meeting for the therapy.

In this episode presented by Eclipsebio, BioSpace’s head of insights Lori Ellis discusses mRNA and srRNA with Andy Geall of Replicate Bioscience and Alliance for mRNA Medicines, and Pad Chivukula of Arcturus Therapeutics.

Partners Ultragenyx and Mereo BioPharma saw their stocks drop by 21% and 30%, respectively, after announcing that the Phase II/III study of their osteogenesis imperfecta candidate will proceed to final analysis, implying it did not show sufficiently strong results at an interim analysis.

President Donald Trump’s One Big Beautiful Bill, signed into law last week, reintroduces broader exemptions for orphan drugs from the IRA’s drug price negotiation program—a move welcomed by the biopharma industry. The new tax law also cuts Medicaid funding, posing a minimal risk to pharma’s bottomlines and potentially jeopardizing hospitals’ 340B status. It does not, however, include new rules for pharmacy benefit managers that had been in an earlier draft.

After a season of regulatory upheaval, obesity and rare genetic diseases will likely remain major themes for biopharma in 2025, according to Jefferies.

The pivotal trial for Neurogene’s Rett syndrome gene therapy makes use of baseline controls and a rigorous endpoint that could help ensure a broader label for the drug product, if approved, according to analysts.