Kezar Life Sciences, Inc. is a United States-based clinical-stage biopharmaceutical company focused on identifying and advancing novel small molecule therapies. Its mission is to address significant unmet medical needs in both immune-mediated diseases and various forms of cancer. The company's most advanced experimental drug is KZR-616, a specialized immunoproteasome inhibitor. This candidate is currently undergoing Phase 2 clinical evaluation for several conditions, including lupus nephritis, dermatomyositis, and polymyositis. Concurrently, KZR-616 is also in Phase 1b clinical trials for systemic lupus erythematosus and lupus nephritis. In its preclinical pipeline, Kezar is developing KZR-261, a pioneering first-in-class protein secretion inhibitor, as well as KZR-TBD, which is being investigated for its potential in oncology and immunology. The firm was founded in 2015 and is headquartered in South San Francisco, California.