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Caffeine Prevents LPS-induced Inflammatory Responses in RAW264.7 Cells and Zebrafish

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Publisher Elsevier
Date 2016 Feb 9
PMID 26852703
Citations 45
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Abstract

Caffeine is a white crystalline xanthine alkaloid found in the seeds of coffee plants and leaves of the tea bush. In this study, we evaluated whether caffeine exerts anti-inflammatory effects on lipopolysaccharide (LPS)-induced inflammation both in vitro and in vivo. RAW264.7 cells were treated with various concentrations of caffeine in the presence or absence of LPS. Caffeine decreased the LPS-induced inflammatory mediator, nitric oxide (NO). Caffeine treatment also reduced the expression of pro-inflammatory genes, including inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), interleukin (IL)-3, IL-6 and IL-12, and decreased both IL-6 secretion and phosphorylated p38MAPK expression in LPS-treated RAW264.7 cells. Caffeine inhibited nuclear translocation of nuclear factor κB (NF-κB) via IκBα phosphorylation. In addition, caffeine inhibited LPS-induced NO production in zebrafish. These results suggest that caffeine may suppress LPS-induced inflammatory responses in RAW264.7 cells by regulating NF-κB activation and MAPK phosphorylation.

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