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Zenas BioPharma Announces Submission of Biologics License Application (BLA) to U.S. FDA for Obexelimab in IgG4-RD

$ZBIOPress releaseMay 28, 2026, 7:05 AM ETRead the release

Zenas BioPharma submitted a Biologics License Application (BLA) to the FDA for obexelimab, its lead candidate for treating IgG4-Related Disease (IgG4-RD). The submission is supported by the Phase 3 INDIGO trial, which met its primary endpoint with a 56% reduction in flare risk versus placebo (HR 0.44, p=0.0005) and all four key secondary endpoints.

Key figures

Drug Name
obexelimab
Phase Of Trial
Phase 3
P value
0.0005
Hazard ratio
0.44
Total trials
8
Trial duration weeks
52
Total subjects evaluated
383
Primary endpoint reduction
56%

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