A Study of Telitacicept for the Treatment of Moderately to Severely Active Systemic Lupus Erythematosus (REMESLE-1)

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.