Rare diseases

The polycythemia vera field is heating up, with Disc Medicine and Silence Therapeutics each advancing next-generation therapies, playing catch-up to Takeda and Protagonist Therapeutics, who won the FDA’s approval last month for Mimrylo.

Novartis’ shares fell 13% this week after the report of three separate late-stage asset setbacks. The impact went beyond the Swiss drugmaker, dragging peers down across the market.

Encoded Therapeutics’ lead asset ETX101 is a gene therapy being tested for Dravet syndrome. Phase 1/2 data showed substantial reductions in seizures.

September has been a rough month already for Novo Nordisk, which canned two more late-stage trials of its embattled IL-6 inhibitor, and Novartis, which took Phase 3 hits in both cardiovascular and muscular dystrophy indications; Ultragenyx’s big bet in Angelman syndrome failed to yield benefit in Phase 3 but Ionis’ Pharmaceuticals nabbed the first targeted approval for Alexander disease; and on the business side, biopharma investment is back in a big way.

While Novartis’ antibody-oligonucleotide conjugate failed to significantly improve hand function in patients with myotonic dystrophy type 1, the asset nevertheless showed signs of clinical activity in secondary and exploratory measures.

Zanvastro, an antisense oligonucleotide therapy, represents the first independent neurology launch for Ionis Pharmaceuticals, which intends to leverage the foothold for more approvals in rare neurodegenerative diseases, including Angelman syndrome.

The success of apazunersen in a Phase 3 trial for Angelman syndrome was a key driver of Ultragenyx’s value, according to William Blair, and the asset’s failure robs the biotech of any meaningful near-term milestones.

Last month’s FDA advisory committee meetings for therapies developed by Capricor Therapeutics and Replimune effectively illustrate the different outcomes for patients when the agency prioritizes specialization in its reviews.

CSL Vifor holds the marketing authorization for Tavneos in the U.K., where the drug is marketed as Avacopan Vifor. It continues to be sold on the U.S. market by Amgen despite concerns raised by the FDA.

Biomarin has granted Ascendis a non-exclusive, worldwide license to use navepegritide, the active ingredient in the latter company’s recently approved achondroplasia drug Yuviwel, in exchange for 18–20% royalties on net sales.