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Zenas BioPharma's obexelimab reduced IgG4-related disease flares by 56% in Phase 3 trial, meeting its primary endpoint.
Zenas BioPharma's Phase 3 INDIGO trial of obexelimab for IgG4-related disease met its primary endpoint, showing a 56% reduction in disease flare risk over 52 weeks versus placebo, with significant improvements across all secondary endpoints and a favorable safety profile.
The company plans to file for U.S. approval in Q2 2026 and for European approval later in the year.
Despite the positive results, shares dropped over 55% as the outcome fell short of Wall Street expectations, particularly compared to Amgen’s Uplizna, which showed an 87% reduction in flares.
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El obexelimab de Zenas BioPharma redujo los brotes de enfermedad relacionados con IgG4 en un 56% en el ensayo de fase 3, cumpliendo su objetivo primario.