Hearing loss is a major global health challenge, affecting over 5% of the population and largely lacking effective biological therapies. Mutations in KCNQ4, which encodes the Kv7.4 potassium channel essential for outer hair cell function, are a leading cause of autosomal dominant, non-syndromic hearing loss (DFNA2).

Acute pancreatitis took center stage as Wall Street took heed of phase III data from Ionis Pharmaceuticals Inc. with olezarsen for severe hypertriglyceridemia (sHTG), while another player in the space, Arrowhead Pharmaceuticals Inc., signed a sizeable deal in a separate therapeutic area with Novartis AG.

The FDA has granted orphan drug designation to Vanda Pharmaceuticals Inc.’s VGT-1849B, a selective peptide nucleic acid-based JAK2 inhibitor for the treatment of polycythemia vera (PV).

A few years after it was founded with the aim of taking RNA therapies to the next level, Arnatar Therapeutics Inc. emerged from stealth, disclosing a $52 million series A round raised in 2024 as well as U.S. FDA orphan and rare pediatric disease designations for ART-4, an antisense oligonucleotide candidate targeting the root cause of Alagille syndrome.

Arnatar Therapeutics Inc.’s ART-4, an upregulating antisense oligonucleotide (ASO) therapeutic candidate for the treatment of Alagille syndrome (ALGS), has been awarded U.S. orphan drug and rare pediatric disease designations by the FDA. Approximately 95% of ALGS cases are caused by haploinsufficient mutations in the Jagged-1 (JAG1) gene, leading to insufficient JAG1 protein levels and impaired liver bile duct development.

In Ionis Pharmaceuticals Inc.’s second U.S. FDA approval in under a year, the agency approved Dawnzera (donidalorsen) as a prophylactic therapy in the rare and genetic disease hereditary angioedema (HAE). The approval came as scheduled as the NDA had a PDUFA date of Aug. 21. Dawnzera now joins a market with previously approved drugs for the rare, genetic, life-threatening condition, as well as other companies with HAE drugs in development.

The FDA has granted orphan drug designation to Cure Rare Disease’s CRD-002, an antisense oligonucleotide therapeutic for the treatment of spinocerebellar ataxia (SCA), including spinocerebellar ataxia type 3 (SCA3).