The study will enrol adult participants with refractory Systemic Lupus Erythematosus (SLE) The study will be run in 2 parts;
First part is Phase 1b during which the study aims to assess safety and tolerability of AZD0120 in patients in refractory SLE cohorts
Second part is Phase 2, during which the study aims to assess safety, tolerability and efficacy of the selected dose, following Phase 1b completion, in patients with refractory SLE