Vera Therapeutics Announces Atacicept Achieved 46% Proteinuria Reduction in ORIGIN Phase 3 Trial in Adults with IgA Nephropathy

Core Insights - Vera Therapeutics announced that the ORIGIN Phase 3 trial of atacicept for immunoglobulin A nephropathy (IgAN) met its primary endpoint, demonstrating significant efficacy in reducing proteinuria [1][7]. Efficacy Results - Participants treated with atacicept achieved a 46% reduction from baseline in proteinuria, measured by the 24-hour urine protein-to-creatinine ratio (UPCR), and a 42% reduction compared to placebo at week 36 (p<0.0001) [2][7]. - Other prespecified endpoints showed results consistent with or better than those observed in the ORIGIN Phase 2b trial [2][7]. Safety Profile - The safety profile of atacicept was favorable and comparable to that of the placebo [2][7]. Regulatory Plans - Vera plans to share these results with the FDA and intends to submit a Biologics License Application (BLA) for atacicept in IgAN in the fourth quarter of 2025, potentially allowing for US approval and commercial launch in 2026 [4][7]. Trial Details - The ORIGIN 3 trial is a global, multicenter, randomized, double-blind, placebo-controlled study involving 431 adults with IgAN, with participants receiving either atacicept 150 mg or placebo [5][7]. - The trial continues to evaluate changes in kidney function over two years, with completion expected in 2027 [5][7]. Company Vision - Vera Therapeutics aims to advance the standard of care in IgAN and other autoimmune kidney diseases, aspiring to evolve kidney medicine practices [4][12].