Latest Rare Diseases News

Opthea Limited reports a striking turnaround with a $339.9 million profit for H1 2026, driven by a strategic refocus on developing OPT-302 for Lymphangioleiomyomatosis (LAM), a rare lung disease affecting women. The company plans a rebrand and ASX reinstatement as it charts a new course in rare respiratory health.

CSL Limited has released its half-year results showing a slight revenue decline amid ongoing transformation efforts, while maintaining its full-year guidance and expanding its share buyback program.

Neuren Pharmaceuticals has dosed the first patient in its groundbreaking Phase 3 trial of NNZ-2591 for Phelan-McDermid syndrome, a rare genetic disorder with no approved therapies. The trial marks a significant step forward for the PMS community and rare disease drug development.

The US Congress has reauthorized the Rare Pediatric Disease Priority Review Voucher program through September 2029, a move that could significantly benefit Neuren Pharmaceuticals as it advances its rare disease drug candidates.

Neuren Pharmaceuticals has received detailed feedback from the US FDA on its clinical development plans for NNZ-2591 targeting hypoxic ischemic encephalopathy and Pitt Hopkins syndrome, paving a clearer path forward despite some delays.

Acadia Pharmaceuticals has received a negative vote from the European Medicines Agency’s committee on its application to market trofinetide for Rett syndrome in the EU, prompting plans for a re-examination request.

Neurotech International has secured a Rare Pediatric Disease Designation from the FDA for its lead drug NTI164 targeting Rett syndrome, alongside publishing promising clinical data and raising $8.7 million to fuel further development.

Percheron Therapeutics has reported encouraging safety and efficacy signals from its HMBD-002 phase I trial, and outlined an innovative modular phase II trial design targeting multiple cancers in 2026.

Zelira Therapeutics has raised nearly US$33 million to fund clinical trials for its HOPE 1 cannabinoid-based medicine targeting autism, while also benefiting from a $1.07 million R&D tax refund.

Zelira Therapeutics has raised nearly US$33 million from ThirdGate Capital to advance its HOPE® 1 drug targeting autism-related Phelan-McDermid Syndrome through FDA clinical trials. This funding milestone sets the stage for pivotal regulatory progress in the US.

Neuren Pharmaceuticals’ partner Acadia projects DAYBUE sales to reach around US$700 million by 2028, driven by US market expansion and international approvals. The launch of a new formulation and ongoing clinical trials in Japan underpin this optimistic outlook.

Neuren Pharmaceuticals has published promising Phase 2 trial results for NNZ-2591 in Phelan-McDermid syndrome, underpinning its ongoing Phase 3 Koala trial recruiting in the US.