期刊
RHEUMATOLOGY
卷 60, 期 6, 页码 2602-2614出版社
OXFORD UNIV PRESS
DOI: 10.1093/rheumatology/keab146
关键词
fibromyalgia; cytokines; systematic review; meta-analysis; chronic pain syndromes; chemokine; eotaxin
类别
资金
- Centre of Excellence (Centre for Adolescent Rheumatology Versus Arthritis) [21593]
- NIHR UCLH BRC [BRC 525 III/CC 101350]
The study showed significant differences in the peripheral blood cytokine profiles of fibromyalgia patients compared with healthy controls, with consistently elevated chemokine eotaxin. Meta-analysis revealed increased levels of TNF-alpha, IL-6, IL-8, and IL-10 in fibromyalgia patients.
Objectives. The aetiology of primary chronic pain syndromes (CPS) is highly disputed. We performed a systematic review and meta-analysis aiming to assess differences in circulating cytokine levels in patients with diffuse CPS (fibromyalgia) vs healthy controls (HC). Methods. Human studies published in English from the PubMed, MEDLINE/Scopus and Cochrane databases were systematically searched from inception up to January 2020. We included full text cross-sectional or longitudinal studies with baseline cytokine measurements, reporting differences in circulating cytokine levels between fibromyalgia patients and HC. Random-effects meta-analysis models were used to report pooled effects and 95% CIs. This study is registered with PROSPERO (CRD42020193774). Results. Our initial search yielded 324 papers and identified 29 studies (2458 participants) eligible for systematic review and 22 studies (1772 participants) suitable for meta-analysis. The systematic analysis revealed reproducible findings supporting different trends of cytokine levels when fibromyalgia patients were compared with HC, while the chemokine eotaxin, was consistently raised in fibromyalgia. Metaanalysis showed significantly increased TNF-alpha [standardized mean difference (SMD) = 0.36, 95% CI: 0.12, 0.60, P= 0.0034; I-2 =71%, Q(2) P= 0.0002], IL-6 (SMD=0.15, 95% CI: 0.003, 0.29, P= 0.045; I-2 =39%, Q(2) P= 0.059), IL-8 (SMD = 0.26, 95% CI: 0.05, 0.47, P= 0.01; I-2 =61%, Q(2) P= 0.005) and IL-10 (SMD = 0.61, 95% CI: 0.34, 0.89, P < 0.001; I-2 =10%, Q 2 P= 0.34) in fibromyalgia patients compared with HC. Conclusion. We found evidence of significant differences in the peripheral blood cytokine profiles of fibromyalgia patients compared with HC. However, the distinctive profile associated with fibromyalgia includes both pro-inflammatory (TNF-alpha, IL-6, IL-8) and anti-inflammatory (IL-10) cytokines in pooled analysis, as well as chemokine (eotaxin) signatures. Further research is required to elucidate the role of cytokines in fibromyalgia.
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