期刊
JOURNAL OF NUTRITIONAL SCIENCE AND VITAMINOLOGY
卷 55, 期 2, 页码 126-130出版社
CENTER ACADEMIC PUBL JAPAN
DOI: 10.3177/jnsv.55.126
关键词
lipoic acid; acrolein; cytotoxicity; oxidative stress
Acrolein is a highly reactive unsaturated hazardous air pollutant of human health concern, particularly as a component of cigarette smoke. In this study, the effects of acrolein on mitochondrial damage in IMR-90 (a human lung fibroblast cell line). and the reduction of this damage by R-alpha-lipoic acid were examined. Our results show that acute acrolein exposure exceeding 100 mu M (24 h) in IMR-90 cells caused serious cytotoxicity, including decreases in cell viability, mitochondrial membrane potential, SOD activity, GSH and ATP levels, and acute exposure also increased in ROS levels. Pretreatment with R-alpha-lipoic acid effectively protected IMR-90 cells from acrolein toxicity The results show that acrolein is a mitochondrial toxin in IMR-90 cells and that acrolein-induced oxidative mitochondrial dysfunction is reduced by R-alpha-lipoic acid. These experiments imply R-alpha-lipoic acid may be an effective antioxidant for reducing or preventing chronic oxidant-induced lung cells degeneration in vivo from a variety of sources. including cigarette smoke.
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