Capsiate inhibits ultraviolet B-induced skin inflammation by inhibiting Src family kinases and epidermal growth factor receptor signaling

Free Radical Biology & Medicine
Eun-Jung LeeTae-Yoon Kim

Abstract

Capsiate, one of the major capsaicinoids, is nonpungent and present in sweet pepper. We investigated the effects of capsiate on the ultraviolet B (UVB)-induced inflammatory response in skin and its molecular mechanisms. Capsiate-pretreated human keratinocytes inhibited intracellular reactive oxygen species (ROS), which activate the mitogen-activated protein kinase and nuclear factor-kappaB (NF-kappaB) pathways. Therefore, we determined the effects of capsiate on these pathways. Capsiate inhibited UVB-induced cyclooxygenase-2 (COX-2) expression, extracellular signal-related kinase 1/2 phosphorylation, nuclear translocation of NF-kappaB, and the expression of proinflammatory cytokines and potent angiogenic factors, including vascular endothelial cell growth factor and matrix metalloproteinase-2 (MMP-2) and MMP-9. In addition, capsiate inhibited UVB-induced epidermal growth factor receptor (EGFR) activation, which reduces the levels of proinflammatory cytokines and angiogenic factors. We also investigated the photoprotective effects of capsiate in vivo. Topical treatment with capsiate significantly decreased UVB-induced skin damage and inhibited the expression of COX-2, proinflammatory cytokines, and angiogenic factors, including ...Continue Reading

Citations

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