Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease with heterogeneous manifestations and disease course. Despite advances in medical care, there are still significant unmet needs in SLE with diminished health-related quality of life (HRQoL), persistent disease activity, disease flares, intolerance to standard of care (SOC) therapies, and development of organ damage and co-morbidities.~Telitacicept is a fully human TACI-Fc fusion protein that targets B lymphocyte stimulator (BLyS) and a proliferating-inducing ligand (APRIL).Blocking the interaction of BLyS and APRIL with their cell membrane receptors (TACI, BCMA, and BAFF-R) would inhibit B cell proliferation and maturation, suppresses immune responses, and may alleviate autoimmune symptoms.~This Phase 3 study is a 2-stage operationally seamless study to evaluate the efficacy and safety of telitacicept 160 mg and 240 mg in a global patient population with active SLE disease.~Stage 1 - a dose ranging study to evaluate the efficacy, safety, pharmacokinetics (PK) and PD of telitacicept 160 mg and 240 mg in an international cohort of adult SLE patients.~Stage 2 - a confirmatory efficacy study to evaluate the telitacicept dose selected from Stage 1.
The purpose of this study is to evaluate the efficacy and safety of telitacicept in the treatment of moderately to severely active SLE.