Biotechnology The Division of Hepatology and Nutrition of the US Food and Drug Administration (FDA) has lifted the partial clinical hold on the completed PORTOLA Phase IIa clinical trial evaluating zetomipzomib, a first-in-class selective immunoproteasome inhibitor, in patients with autoimmune hepatitis (AIH), California, USA-based drug developer Kezar Life Sciences announced yesterday. 16 July 2025