Linked Life Data

18571461

Source:http://linkedlifedata.com/resource/pubmed/id/18571461

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pubmed-article:18571461pubmed:abstractTextCaffeic acid phenethyl ester has been shown to have anti-inflammatory and anti-cancer effects. We examined the effects of caffeic acid phenethyl ester on lipopolysaccharide-induced production of nitric oxide and prostaglandin E2, and expression of inducible nitric oxide synthase and cyclooxygenase-2 in RAW 264.7 macrophages. We also investigated the effects of caffeic acid phenethyl ester on lipopolysaccharide-induced septic shock in mice. Our results indicate that caffeic acid phenethyl ester inhibits lipopolysaccharide-induced nitric oxide and prostaglandin E2 production in a concentration-dependent manner and inhibits inducible nitric oxide synthase and cyclooxygenase-2 in RAW 264.7 cells, without significant cytotoxicity. To further examine the mechanism responsible for the inhibition of inducible nitric oxide synthase and cyclooxygenase-2 expression by caffeic acid phenethyl ester, we examined the effect of caffeic acid phenethyl ester on lipopolysaccharide-induced nuclear factor-kappaB activation and the phosphorylation of mitogen-activated protein kinases. Caffeic acid phenethyl ester treatment significantly reduced nuclear factor-kappaB translocation and DNA-binding in lipopolysaccharide-stimulated RAW 264.7 cells. This effect was mediated through the inhibition of the degradation of inhibitor kappaB and by inhibition of both p38 mitogen-activated protein kinase and extracellular signal-regulated kinase phosphorylation, at least in part by inhibiting the generation of reactive oxygen species. Furthermore, caffeic acid phenethyl ester rescued C57BL/6 mice from lethal lipopolysaccharide-induced septic shock, while decreasing serum levels of tumor necrosis factor-alpha and interleukin-1beta. Collectively, these results suggest that caffeic acid phenethyl ester suppresses the induction of cytokines by lipopolysaccharide, as well as inducible nitric oxide synthase and cyclooxygenase-2 expression, by blocking nuclear factor-kappaB and p38/ERK activation. These findings provide mechanistic insights into the anti-inflammatory and chemopreventive actions of caffeic acid phenethyl ester in macrophages.lld:pubmed
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pubmed-article:18571461pubmed:articleTitleCaffeic acid phenethyl ester protects mice from lethal endotoxin shock and inhibits lipopolysaccharide-induced cyclooxygenase-2 and inducible nitric oxide synthase expression in RAW 264.7 macrophages via the p38/ERK and NF-kappaB pathways.lld:pubmed
pubmed-article:18571461pubmed:affiliationDepartment of Marine Life Science, Chosun University, Gwangju 501-759, South Korea.lld:pubmed
pubmed-article:18571461pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:18571461pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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