Abstract
PurposeTo evaluate the association of serum levels of adipokines and cytokines with psoriasis.Materials and MethodsA comprehensive literature search was performed in PubMed, ScienceDirect and Web of Science for the available relevant studies published before December 1, 2016. Differences in serum marker levels between patients and controls were pooled as standardized mean differences (SMDs) with 95% confidence interval to combine the effect estimations. We also conducted stratified analysis, meta-regression analysis and sensitivity analysis.ResultsSixty-three studies containing 2876 psoriasis patients and 2237 healthy controls were included in this meta-analysis. The pooled serum levels of TNF-α, IFN-γ, IL-2, IL-6, IL-8, IL-18, IL-22, chemerin, lipocalin-2, resistin, sE-selectin, fibrinogen and C3 were higher in psoriasis patients compared with healthy controls (all P < 0.05). In contrast, adiponectin levels were lower. Serum levels of IL-1β, IL-4, IL-10, IL-12, IL-17, IL-21, IL-23, visfatin and omentin were not significantly different between psoriasis patients and controls (all P > 0.05). However, increased serum levels of IL-17 correlated with psoriasis in men. For other biomarkers, age, gender and psoriasis area and severity index did not explain the differences in effect size between the studies.ConclusionsSerum levels of TNF-α, IFN-γ, IL-2, IL-6, IL-8, IL-18, IL-22, chemerin, lipocalin-2, resistin, sE-selectin, fibrinogen, complement 3, and adiponectin correlate with psoriasis and can be used as potential biomarkers for psoriasis and response to the treatment. Future studies are needed to identify additional players involved in the pathogenesis of psoriasis and to fully decipher the underlying mechanism.
Highlights
Psoriasis is a serious, chronic, immune-mediated, hyperproliferative, and inflammatory skin disease of varying severity, which may induce itchy or painful lesions and negatively impact quality of life [1, 2]
The pooled serum levels of tumour necrosis factor (TNF)-α, IFN-γ, IL-2, IL-6, IL-8, IL-18, IL-22, chemerin, lipocalin-2, resistin, sE-selectin, fibrinogen and complement 3 (C3) were higher in psoriasis patients compared with healthy controls
Serum levels of TNF-α, IFN-γ, IL-2, IL-6, IL-8, IL-18, IL-22, chemerin, lipocalin-2, resistin, sE-selectin, fibrinogen, complement 3, and adiponectin correlate with psoriasis and can be used as potential biomarkers for psoriasis and response to the treatment
Summary
Chronic, immune-mediated, hyperproliferative, and inflammatory skin disease of varying severity, which may induce itchy or painful lesions and negatively impact quality of life [1, 2]. The majority of inflammatory makers produced by adipose tissue and keratinocytes remains in the tissue, a small www.impactjournals.com/oncotarget proportion of these biomarkers could be identified in the systemic circulation [6]. These biomarkers measured in blood could be used to evaluate the disease severity and to monitor response to the treatment [7]. Some of these studies did not explore the effect of potential confounding factors, e.g. age, gender, ethnicity, on the association of adipokines and cytokines with psoriasis
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