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Melatonin supplementation and pro-inflammatory mediators: a systematic review and meta-analysis of clinical trials
Authors
S. Alizadeh
M. Emami
+7 more
P. Janmohammadi
M. Khorshidi
H. Kord-varkaneh
S.H. Mohammed
S.M. Mousavi
A. Saedisomeolia
M. Zarezadeh
Publication date
1 January 2020
Publisher
'Springer Fachmedien Wiesbaden GmbH'
Abstract
Background: Inflammatory processes are involved in chronic diseases. It has been suggested that melatonin reduces inflammation by its radical scavenging properties; however, the results of the previous studies are inconclusive. The objective of the present meta-analysis is to determine the direction and magnitude of melatonin supplementation effect on inflammatory biomarkers. Methods: Databases including PubMed, Scopus, Cochran Library, Embase, and Google Scholar were searched up to April 2019. Meta-analysis was performed using random-effect model. Subgroup analysis, sensitivity analysis, and meta-regression were also carried out. Results: Thirteen eligible studies with 22 datasets with total sample size of 749 participants were included in the meta-analysis. Melatonin supplementation significantly decreased TNF-α and IL-6 levels (WMD = � 2.24 pg/ml; 95% CI � 3.45, � 1.03; P < 0.001; I2 = 96.7%, Pheterogeneity < 0.001) and (WMD = � 30.25 pg/ml; 95% CI � 41.45, � 19.06; P < 0.001, I2 = 99.0%; Pheterogeneity < 0.001), respectively. The effect of melatonin on CRP levels was marginal (WMD = � 0.45 mg/L; 95% CI � 0.94, 0.03; P = 0.06; I2 = 96.6%, Pheterogeneity < 0.001). Conclusion: The results of the present meta-analysis support that melatonin supplementation could be effective on ameliorating of inflammatory mediators. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature
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eprints Iran University of Medical Sciences
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Last time updated on 01/12/2020