Piao MJ, Zhang R, Lee NH, Hyun JW. Protective effect of triphlorethol-A against ultraviolet B-mediated damage of human keratinocytes.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2011;
106:74-80. [PMID:
22093283 DOI:
10.1016/j.jphotobiol.2011.10.007]
[Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 10/01/2011] [Accepted: 10/17/2011] [Indexed: 10/16/2022]
Abstract
Ultraviolet B (UVB) radiation on human skin induces pathophysiological processes such as oxidative stress and inflammation. In previous reports, the antioxidant effects of triphlorethol-A were shown to protect cells against hydrogen peroxide-induced cell damage and gamma ray-induced oxidative stress. In this study, the role of triphlorethol-A in protecting human keratinocytes (HaCaT) against UVB-induced cell damage was investigated. Triphlorethol-A-treated cells were irradiated with UVB (150 mJ/cm(2)). Triphlorethol-A decreased UVB-induced intracellular ROS and restored the activities of antioxidant enzymes decreased by UVB radiation. Triphlorethol-A decreased UVB damage to cellular components, such as lipid membrane and DNA, restored cell viability and reduced UVB-induced apoptosis by inhibiting the mitochondria-mediated caspase pathway. Triphlorethol-A also reduced the UVB-induced loss of ΔΨ(m) and the active forms of caspase 9 and caspase 3. The anti-apoptotic effect of triphlorethol-A was found to involve the inhibition of c-Jun NH(2)-terminal kinase, which was induced by UVB exposure. And triphlorethol-A showed an absorptive capacity at range of UVB. These results suggest that triphlorethol-A protects human keratinocytes against UVB by enhancing the activities of the antioxidant system, inhibiting cellular damage and absorbing the UVB.
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