Sjogren's syndrome is a chronic, progressive autoimmune disease of unclear etiology typically originating in exocrine glands and capable of affecting the function of almost any organ system in the body. Nipocalimab is a fully human aglycosylated immunoglobulin (Ig)G1 monoclonal antibody designed to selectively bind, saturate, and block the IgG binding site on the endogenous neonatal fragment crystallizable receptor (FcRn). Nipocalimab blocks the binding site for IgG on FcRn, leads directly to increased IgG catabolism and a decrease in circulating IgG antibody concentrations, including pathogenic IgG antibody concentrations, and directly inhibits inflammatory cellular responses to these pathogenic IgG. Therefore, Nipocalimab may successfully treat pSS and improve disease manifestations. The study will consist of Screening Period (less than or equal to [<=] 6 Weeks), Double-blind Treatment Period (24 Weeks), and a Follow-up Period (6 Weeks). Key safety assessments will include adverse events (AEs), serious adverse events (SAEs), adverse events of special interests (AESIs), clinical laboratory safety tests (hematology, chemistry, urinalysis, and lipid profile) and vital signs. The total duration of the study is up to 36 weeks.
The purpose of this study is to evaluate the efficacy and safety of nipocalimab in participants with primary Sjogren's syndrome (pSS) versus placebo.