研究论文
袭著革,晁福寰,孙咏梅,杨丹凤,张华山,刘中文.标准石英粉尘及青石棉直接诱导8-羟基脱氧鸟苷加合物形成的研究[J].环境科学学报,2001,21(4):481-485
标准石英粉尘及青石棉直接诱导8-羟基脱氧鸟苷加合物形成的研究
- Study on the formation of 8-hydroxy-2'-deoxyguanosine adduct directly induced by standard silicon dust and crocidolite
- 基金项目:中国博士后科学基金;军事医学科学院创新基金资助课题
- 袭著革
- 中国军事医学科学院卫生学环境医学研究所,天津 300050
- 晁福寰
- 中国军事医学科学院卫生学环境医学研究所,天津 300050
- 孙咏梅
- 中国军事医学科学院卫生学环境医学研究所,天津 300050
- 杨丹凤
- 中国军事医学科学院卫生学环境医学研究所,天津 300050
- 张华山
- 中国军事医学科学院卫生学环境医学研究所,天津 300050
- 刘中文
- 中国军事医学科学院卫生学环境医学研究所,天津 300050
- 摘要:应用液相色谱结合电化学检测技术,研究了标准石英粉尘和青石棉体外诱导DNA分子氧化损伤产生加合物8羟基脱氧鸟苷的形成与机制.结果表明,石英粉尘和青石棉均可致DNA分子氧化损伤并形成8羟基脱氧鸟苷,但青石棉作用强于石英粉尘;石英粉尘和青石棉对H2O2氧化DNA的催化能力有较大差异.标准石英粉尘和青石棉,具有直接的遗传毒性;两者诱导DNA分子形成强致突变的8羟基鸟苷可能是其潜在的致癌机制之一.
- Abstract:The formation and mechanism of oxidative DNA damage marker 8 hydroxy 2' deoxyguanosine, induced by standard silicon dust and crocidolite in vitro,were discussed using high performance liquid chromatograph coupled with electrochemical detection. The results showed that standard silicon dust and crocidolit fibers cause DNA oxidative damage to form 8 hydroxy 2' deoxyguanosine; but the effect induced by crocidolit fibers is sronger than by standard silicon dust. The catalytic ability of H2O2oxidizing DNA by standard silicon dust is sighificantly different from thant by crocidolit fibers.Both possece direct genotoxicity. To induce DNA forming strongly mutagentic 8 hydroxy 2' deoxyguanosine is one of the possible mechanism of their potential carcinogensis.
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