
FAQ: What is the MOA of guselkumab and icotrokinra
In this FAQ video module, Jennifer Mylod, a rheumatology nurse practitioner in Phoenix, Arizona, compares the mechanisms of action of guselkumab and icotrokinra within the interleukin-23 (IL-23)/T-helper 17 (Th17) signaling pathway. This overview highlights the differences between an injectable monoclonal antibody that targets the IL-23 cytokine and an oral peptide that selectively binds the IL-23 receptor. This episode explores guselkumab’s binding to the IL-23 p19 subunit and its interaction with CD64 on IL-23-producing immune cells, alongside icotrokinra’s receptor-targeted approach to blocking IL-23 signaling. Jennifer also discusses downstream inflammatory cytokines, including IL-17A, IL-17F, and IL-22, and their connection to the inflammatory processes involved in psoriasis and psoriatic arthritis. The discussion helps clarify how these different molecular targets intersect within the same inflammatory pathway. Designed for rheumatology advanced practice providers, nurse practitioners, physician assistants, and other clinicians caring for patients with psoriasis and psoriatic arthritis, this module offers an overview of IL-23 signaling, targeted therapies, and the distinction between cytokine inhibition and receptor blockade. For more rheumatology education and clinical resources, visit RhAPP’s website, the RhAPP Content Rheum, or the RhAPP ACE app.