Cholesterol-3-beta, 5-alpha, 6-beta-triol induced genotoxicity through reactive oxygen species formation.

作者: Y.W. Cheng , J.J. Kang , Y.L. Shih , Y.L. Lo , C.F. Wang

DOI: 10.1016/J.FCT.2005.01.007

关键词:

摘要: The mutagenicity of oxysterols, cholesterol-3β,5α,6β-triol (α-Triol), 7-keto-cholesterol (7-Keto) and cholesterol-5α,6α-epoxide (α-Epox) were examined by the Ames method chromosome aberration test in this study. Only α-Triol concentration-dependently caused an increase bacterial revertants absence metabolic activating enzymes (S9), but not 7-keto α-Epox. mutagenic effect was reduced addition S9. On other hand, although significantly induced CHO-K1 cells with without However, S9 degree abnormal structure compared to mix. Catalase superoxide dismutase (SOD) inhibited Salmonella typhimurium frequency CHO cells, suggesting that reactive oxygen species (ROS) might be involved genotoxic α-Triol. Treatment increased ROS production which could attenuated catalase SOD. Results study suggested, for first time α-Triol, causes ROS-dependent manner.

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