Circulating inflammatory cytokines and psoriasis risk: A systematic review and meta-analysis

Abstract

Background Psoriasis is a systemic immune-mediated chronic inflammatory skin disease; its systemic manifestations and periodic recurrence negatively affect a patient’s quality of life. Inflammatory cytokines are known to have an important role in the onset and progression of psoriasis, however, data on the association between circulating inflammatory cytokines and psoriasis risk is inconclusive. Here, we explore the relevance of circulating proinflammatory factors to the pathogenesis of psoriasis using a meta-analysis. Objective To explore the association between circulating levels of inflammatory factors and psoriasis to elucidate the mechanisms underlying psoriasis and improve clinical diagnosis and treatment. Methods We systematically retrieved articles published in PubMed, EMBASE, the Cochrane Library and the Web of Science from the establishment of each database to January 2023. The standard mean difference (SMD) in cytokine levels of individuals with psoriasis and healthy controls was used to check for correlations between circulating inflammatory factor levels and psoriasis. Results Fifty-seven studies, with data from 2838 patients, were retrieved and included in the meta-analysis. Eleven inflammatory factors were studied (circulating interleukin-2 (IL-2), IL-4, IL-12, IL-17, IL-18, IL-22, IL-23, IL-35, IL-36, transforming growth factor-beta (TGF-β) and gamma-interferon (IFN-γ)). Of these, IL-2 [SMD = 1.29 (95% CI: 0.61–1.97; P <0.001)], IL-17 [SMD = 0.71 (95% CI: 0.12–1.30; P = 0.018)], IL-18 [SMD = 1.27 (95% CI: 0.64–1.90; P <0.001)], and IFN-γ [SMD = 1.90 (95% CI: 1.27–2.52; P <0.001)] levels had significant correlations with psoriasis. Conclusion Increased serum concentrations of the circulating inflammatory cytokines IL-2, IL-17, IL-18 and IFN-γ were significantly correlated with psoriasis.

Wogonin ameliorates the proliferation, inflammatory response, and pyroptosis in keratinocytes via NOD‐like receptor family pyrin domain containing 3/Caspase‐1/Gasdermin‐D pathway

“…However, effective strategies to cure psoriasis remain unavailable. Currently, it is generally believed that the immune‐inflammatory cascade mediated by the immune cell function and the release of inflammatory factors (e.g., tumor necrosis factor‐alpha [TNF‐α], interleukin‐1beta [IL‐1β], IL‐23, and IL‐12) are closely implicated in the onset and progression of psoriasis despite its inexact pathogenesis 4,5 . Therefore, the development of anti‐inflammatory agents may represent an effective therapeutic measure for psoriasis.…”