PsA is a chronic inflammatory multi-faceted disease that impacts the peripheral and axial joints, soft tissues, and skin. Guselkumab is a fully human monoclonal antibody (mAb) directed against the p19 subunit of interleukin (IL)-23, blocks the binding of extracellular IL-23 to the cell surface IL-23 receptor, inhibiting IL-23 specific intracellular signaling, subsequent activation, and cytokine production. Golimumab is a fully human anti-TNF-alpha mAb that binds to TNF-alpha with high affinity, prevents binding to its receptors, thereby inhibiting the biological activity of TNF-alpha and resulting in limited production or activity of inflammatory cytokines, thereby providing therapeutic benefit in various chronic inflammatory disorders, including PsA. This study will consist of a Screening Phase (up to 6 weeks), Double-blind Phase from Weeks 0 to 24 which includes the active treatment phase and the primary efficacy visit (Week 24), and Safety Follow-up Phase from Week 24 to Week 36. Key safety assessments will include adverse events (AEs), clinical laboratory safety tests (hematology and chemistry), vital signs, monitoring for injection-site and hypersensitivity reactions, and early detection of active tuberculosis (TB). The total duration of the study is up to 42 weeks.
The purpose of this study is to evaluate the efficacy of guselkumab plus golimumab combination treatment in participants with active psoriatic arthritis (PsA) and inadequate response (IR) to prior anti-tumor necrosis factor-alpha (anti-TNF-alpha) therapies by assessing clinical response compared with guselkumab monotherapy.