請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/62119
標題: Antioxidant activities of phenolic acids on ultraviolet radiation-induced erythrocyte and low density lipoprotein oxidation
作者: Hsieh, C.L.
顏國欽
Yen, G.C.
Chen, H.Y.
關鍵字: ultraviolet B
human erythrocytes
low-density lipoprotein
phenolic
acids
glutathione s-transferases
lipid-peroxidation
alpha-tocopherol
caffeic acid
dna-damage
green tea
in-vitro
skin
irradiation
inhibition
期刊/報告no:: Journal of Agricultural and Food Chemistry, Volume 53, Issue 15, Page(s) 6151-6155.
摘要: The exposure of mammalian cells to UV light induces various deleterious responses. Some of the major harmful effects are DNA damage, cell membrane peroxidation, systemic immune suppression, and aging acceleration. Reactive oxygen species and free radicals are believed to be largely responsible for some of the deleterious effects of UV upon cells. Typical administration of antioxidants has recently proved to represent a successful strategy for protecting the cells against UV-mediated oxidative damage. The objective of this study was to investigate the inhibitory effect of phenolic acids (caffeic acid, ferulic acid, gallic acid, and protocatechuic acid) on oxidative damage in human erythrocytes and low-density lipoprotein (LDL) induced by UVB radiation. The results revealed that the thiobarbituric acids reactive substances induced by UVB were decreased from 2.78 to 0.12-0.89 nmol MDA/mg protein in erythrocyte ghost and from 0.72 to 0.14-0.43 nmol MDA/mg protein in LDL by the addition of phenolic acids (100 mu M). Caffeic acid, ferulic acid, and gallic acid exhibited over 85 and 60% inhibitory effect toward UVB-induced oxidation in erythrocytes and LDL, respectively. Phenolic acids, especially gallic acid, could maintain the normal glutathione levels and glutathione peroxidase activity in hemolysate from erythrocytes that were exposed to UVB radiation in comparison with untreated control. The results indicate that the antioxidant activities of caffeic acid and ferulic acid play a potential role in protection against UVB oxidative damage to human erythrocytes and LDL.
URI: http://hdl.handle.net/11455/62119
ISSN: 0021-8561
文章連結: http://dx.doi.org/10.1021/jf050707a
顯示於類別:食品暨應用生物科技學系

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