LAUSR

ABSTRACT Introduction Psoriasis is a chronic inflammatory disease that can drastically affect a patient’s quality-of-life and is associated with multiple comorbid conditions. The most common form of psoriasis is plaque psoriasis, commonly presenting as sharply demarcated, erythematous plaques with overlying silvery scale on the trunk, extensor surfaces, limbs, and scalp. Although initially limited to oral therapies, the choices in systemic therapies for moderate-to-severe plaque psoriasis have evolved with biologic immunotherapies being the main focus. Areas covered In this review, we describe the IL-23/Th17 axis and IL-23 inhibitors as targets for a growing family of biologics. This family includes the FDA-approved medications ustekinumab, guselkumab, tildrakizumab, and risankizumab. We will review the safety and efficacy of these medications throughout various Phase 1,2, and 3, trials for moderate-to-severe psoriasis. A literature search of PubMed was utilized for the following terms: ‘psoriasis and IL-23,’ ‘ustekinumab,’ ‘guselkumab,’ ‘tildrakizumab,’ and ‘risankizumab.’ We also searched for clinical trials involving IL-23 inhibitors registered at ClinicalTrials.gov. Expert opinion Anti-IL 23 therapy, especially anti-p19 monoclonal antibodies, should be considered first-line therapy for moderate-to-severe plaque psoriasis due to their efficacy and relative safety. More research is required to expand the scope of anti-p19 therapy to pediatric populations and additional indications such as psoriatic arthritis.