Kezar Life Sciences Announces Positive Topline Results from the PORTOLA Phase 2a Trial Evaluating Zetomipzomib for the Treatment of Patients with Autoimmune Hepatitis (AIH) and Reports Fourth Quarter and Year End 2024 Financial Results (Businesswire) - Mar 25, 2025 - P2a | N=24 | PORTOLA (NCT05569759) | Sponsor: Kezar Life Sciences, Inc. | "Zetomipzomib treatment results in steroid-sparing biochemical remissions in accordance with AASLD treatment guidelines in a difficult-to-treat, refractory AIH patient population; In relapsed, steroid-dependent AIH patients, of the 21 of 24 entering screening on steroid-based therapy, 36% (5 of 14) of zetomipzomib-treated patients achieved a complete biochemical response (CR) and clinically significant steroid taper to 5 mg/day or less, compared to 0 of 7 of placebo patients; In the intention-to-treat (ITT) population, 31% (5 of 16) of zetomipzomib patients achieved a CR and steroid taper (≤5 mg/day), compared to 1 of 8 placebo patients; Median duration of response in zetomipzomib patients achieving a CR was 27.6 weeks (including the ongoing open-label extension), and no disease flares were reported in any zetomipzomib-treated patient achieving CR during study."
P2a data • Autoimmune Hepatitis
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