Journal
FRONTIERS IN NUTRITION
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fnut.2022.846591
Keywords
diets; inflammatory markers; IL-6; metabolic syndrome; meta-analysis
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Dietary intervention may help decrease IL-6 levels in patients with MetS, but it does not significantly affect IL-1 beta, TNF-alpha, or CRP levels.
BackgroundDietary interventions may modulate inflammatory indicators, but the correlations between dietary intervention and inflammatory markers in metabolic syndrome (MetS) settings remain opaque. ObjectiveTo evaluate the effects of dietary intervention on interleukin-1 beta (IL-1 beta), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-alpha), and C-reactive protein (CRP) in patients with MetS by systematic review and meta-analysis. MethodsDatabases, including PubMed, Embase, Cochrane Library, Scopus, and Google scholar, were searched from June 2011 to June 2021 for relevant available articles. Standardized mean difference (SMD) was generated as effect size by meta-analysis for continuous variants, including IL-1 beta, IL-6, TNF-alpha, and CRP levels. Then, according to study characteristics by dietary patterns of the intervention, subgroup analyses were performed. ResultsFinally, 13 studies comprising a total of 1,101 participants were included for the meta-analysis. IL-6 levels in dietary patients were significantly lower than controls (SMD = -0.30, 95% CI = -0.55, 0.04, p = 0.02, I-2 = 64%). However, IL-1 beta, TNF-alpha, and CRP levels did not change significantly compared with the control group. Sensitivity analyses further yielded similar results. ConclusionsDietary intervention may help decrease IL-6 rather than IL-1 beta, TNF-alpha, or CRP levels in patients with MetS.
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