Dianthus Therapeutics Inc. has announced new data from its Phase 2 MaGic trial evaluating claseprubart in patients with generalized Myasthenia Gravis (gMG). The results, including new open-label extension data, were presented during the Myasthenia Gravis Foundation of America (MGFA) Scientific Session at the 2025 American Association of Neuromuscular and Electromagnetic Medicine (AANEM) Annual Meeting. The company highlighted the potential of 300mg/2mL Q4W dosing of claseprubart and plans to initiate a Phase 3 trial in 2026. The upcoming Phase 3 study will include two claseprubart treatment arms (300mg/2mL Q2W and 300mg/2mL Q4W) versus placebo, with a QMG ≥10 screening criterion. Dianthus also presented preclinical in vitro data suggesting efficacy benefits of upstream (active C1s) inhibition with claseprubart compared to downstream (C5) inhibition. Further details and a replay of the virtual industry forum are available on the company's website.