Phase 2b Study of Tulisokibart Injections to Treat Radiographic Axial Spondyloarthritis Ankylosing Spondylitis

What this Trial Is About

Researchers are investigating new treatments for radiographic axial spondyloarthritis r-axSpA, a form of arthritis causing pain, stiffness, and swelling in the spine and pelvis joints. This condition shows visible damage on X-rays. The study aims to evaluate if different doses of the medicine tulisokibart can improve r-axSpA symptoms compared to a placebo, which helps measure the medicines effects accurately. Participants will be assigned to one of several groups receiving high, medium, or low doses of tulisokibart, or a placebo. The study includes a 16-week placebo-controlled phase. After that, participants receiving the low dose or placebo will be re-assigned to medium or high doses. Following this, there is a long-term extension lasting 124 weeks, which has a 40-week main extension and an 84-week optional extension, allowing continued treatment and observation. Throughout the study, participants will have regular assessments to monitor symptoms and disease activity using various indexes and imaging scores. Researchers will track the percentage of participants who achieve improvement at week 16 and monitor safety by recording adverse events up to approximately 154 weeks. The study uses injections of tulisokibart or placebo under the skin and includes ongoing evaluations of physical function, pain, inflammation, and quality of life.

A Clinical Study of Tulisokibart (MK-7240) to Treat Radiographic Axial Spondyloarthritis (MK-7240-013)