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The therapeutic armamentarium for patients with psoriasis and psoriatic arthritis (PsA) has been strengthened by research affording more individualized treatment regimens with new therapeutic targets. In this article, new systemic therapies for psoriasis are discussed, including a review of the relevant clinical trials for novel therapeutics and their respective mechanisms of action, patient outcomes, and safety profiles. This article is the final installment in a 3-part series on agents in the pipeline for the management of psoriasis and PsA including topical agents, biologic treatments, and systemic therapies in phase 2 through phase 4 clinical trials. These systemic agents offer patients more targeted treatment regimens with the prospect of enhanced therapeutic efficacy and more favorable side-effect profiles with better tolerability.

Biologic treatments have revolutionized the management of psoriasis and psoriatic arthritis (PsA). Anti-tumor necrosis factor (TNF) α monoclonal antibodies presently are approved by the US Food and Drug Administration (FDA) for treatment of these conditions. In this article, new therapies that target this pathway and other steps in the pathogenesis of psoriasis and PsA are discussed, including IL-12/IL-23, IL-17, T-cell activation in antigen-presenting cells, regulatory T cells, toll-like receptors, and granulocyte-macrophage colony-stimulating factor. This article is the second in a 3-part series on treatments presently in the pipeline for the management of psoriasis and PsA including topical agents, biologic treatments, and systemic therapies in phase 2 through phase 4 clinical trials as well as agents that are recently FDA approved. Pivotal clinical trials, mechanisms of action, patient outcomes, and pertinent safety information will be discussed for each new therapy. As our knowledge of the underlying pathogenesis of psoriasis and PsA deepens, it enables the development of more targeted therapies in the management of these conditions.

In recent years, advances in our understanding of inflammatory mediators and the underlying pathogenesis of psoriasis and psoriatic arthritis have shed light on potential therapeutic targets, which has led to the development of several new promising treatments. In this article, key clinical trials, mechanisms of action, patient outcomes, and relevant safety information for these novel topical medications will be evaluated. This article is the first in a 3-part series on treatments presently in the pipeline for the management of psoriasis and psoriatic arthritis including topical agents, biologic treatments, and systemic therapies in phase 2 and phase 3 clinical trials. With novel approaches to the disease process, these therapies may afford more targeted individualized treatment regimens and offer hope to patients with psoriasis and psoriatic arthritis who have reported a suboptimal therapeutic response to conventional therapies.