Vertex Announces US FDA Acceptance of Biologics License Application for Accelerated Approval of Povetacicept in IgA Nephropathy

About this update from Vertex Pharmaceuticals Incorporated

Vertex Pharmaceuticals Incorporated (Nasdaq: VRTX) today announced the U.S. Food and Drug Administration (FDA) has accepted its Biologics License Application (BLA) submission for povetacicept, an investigational engineered fusion protein and dual inhibitor of the BAFF (B cell activating factor) and APRIL (a proliferation inducing ligand) cytokines, in adults with immunoglobulin A nephropathy (IgAN). The FDA has assigned a Prescription Drug User Fee Act (PDUFA) target action date of November 30, 2026. If approved, povetacicept will become the first commercialized therapy in Vertex’s emerging nephrology franchise. “The Phase 3 RAINIER trial is the largest conducted in IgAN and achieved full enrollment faster than any contemporary IgAN trial, reflecting the significant unmet need in IgAN and our urgency to bring povetacicept to patients with this serious disease,” said Nia Tatsis, Ph.D., Executive Vice President and Chief Regulatory and Quality Officer at Vertex. “With today’s FDA acceptance of the BLA, we are one step closer to our goal of transforming the care of patients living with IgAN given povetacicept’s potential best-in-class clinical profile, including every 4-week dosing delivered in a low-volume autoinjector.” As announced in March, the submission is supported by positive data from a pre-specified Week 36 interim analysis of the ongoing Phase 3 RAINIER trial of povetacicept in IgAN, demonstrating a statistically significant and clinically meaningful reduction in proteinuria, a key marker of kidney disease progression, compared to placebo. The RAINIER trial met its primary objective: patients treated with povetacicept achieved a 52.0% reduction from baseline in urine protein to creatinine ratio (UPCR) at Week 36, with a statistically significant and clinically meaningful 49.8% UPCR reduction compared to placebo (P<0.0001). The reduction in proteinuria was consistent across all pre-specified subgroups. The trial also met its secondary objective. For the first secondary endpoint, patients treated with povetacicept demonstrated a 77.4% reduction from baseline in serum galactose deficient IgA1 (Gd-IgA1) compared to an increase of +9.1% in the placebo group, yielding a reduction of 79.3% compared to placebo (P<0.0001). For the second secondary endpoint, in patients with baseline hematuria, 85.1% achieved hematuria resolution in the povetacicept t...

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