Novel Therapeutic Approaches and Treatment Targets for Psoriatic Arthritis

Background: Psoriatic Arthritis (PsA) is the most common extracutaneous manifestation of psoriasis. This chronic inflammatory arthritis is burdened with significant morbidity, leading to irreversible joint damage and disability. In recent years, a deeper understating of its pathogenesis has led to the development of several new drugs targeting different pathways. Objectives: This review aims to highlight the clinical efficacy and safety of the novel agents that have become recently available for the treatment of PsA, as well as new promising therapeutic targets that are being evaluated in clinical trials. Methods: For the purpose of this narrative review, we searched in the MEDLINE and ClinicalTrials. gov databases. Results: After the introduction of the first biological drugs targeting Tumor Necrosis Factor (TNF), several other drugs with different targets have been developed, including anti-Interleukin (IL) 12/23p40, anti-IL17, and, more recently, anti-IL23p19 agents. Conclusions: Data supporting the efficacy of different agents in the major domains of PsA, as well as their safety issues, are summarized here. Finally, the current pipeline, including several novel nonbiological small molecules, such as Janus kinase (JAK) inhibitors, that are currently being evaluated in clinical trials are also presented. Discussion: The availability of newer therapeutic agents has substantially changed the treatment strategy for PsA. In the future, a personalized treatment approach will probably achieve better control of disease manifestations.