The interleukin (IL)-23/IL-17 axis plays a central role in the pathogenesis of immune-mediated diseases such as psoriasis, psoriatic arthritis, Crohn's disease, and uveitis. Therefore, targeting the IL-23/IL-17 axis has become the focus of multiple clinical trials for drug development in patients with autoimmune diseases. We briefly describe the biology of the IL-23/IL-17 axis and its relevance to the pathogenesis of experimental and clinical uveitis, and review the monoclonal antibody therapies targeting this pathway. Finally, 2 ongoing phase 2 trials of the anti–IL-23 biologic therapy ustekinumab (STELARA, Janssen Biotech Inc, Horsham, PA) in patients with noninfectious uveitis are introduced.
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