A Study of KITE-363 in Participants With Refractory Autoimmune Diseases

This study will have two Phases: Phase 1a and Phase 1b. The goal of this clinical study is to learn more about the study drug KITE-363, to establish dosing, tolerability, safety, and preliminary efficacy of KITE-363 in participants with refractory autoimmune diseases. The primary objectives of this study are: Phase 1a: To evaluate the safety and tolerability of KITE-363 in participants with autoimmune disease. To determine the recommended dose for Phase 1b. Phase 1b: To evaluate the safety and efficacy of KITE-363 in participants with autoimmune disease.