Development of a <sup>32</sup>P-Postlabeling/HPLC Method for Detection of Dehydroretronecine-Derived DNA Adducts in Vivo and in Vitro
作者:Ya-Chen Yang、Jian Yan、Mona Churchwell、Richard Beger、Po-Cheun Chan、Daniel R. Doerge、Peter P. Fu、Ming W. Chou
DOI:10.1021/tx000149o
日期:2001.1.1
Pyrrolizidine alkaloids are naturally occurring genotoxic chemicals produced by a large number of plants. Metabolism of pyrrolizidine alkaloids in vivo and in vitro generates dehydroretronecine (DHR) as a common reactive metabolite. In this study, we report the development of a (32)P-postlabeling/HPLC method for detection of (i) two DHR-3'-dGMP and four DHR-3'-dAMP adducts and (ii) a set of eight DHR-derived
吡咯嗪核生物碱是由许多植物产生的天然遗传毒性化学物质。吡咯并立啶生物碱在体内和体外的代谢产生脱氢维甲酸(DHR)作为常见的反应性代谢产物。在这项研究中,我们报告了开发一种(32)P后标记/ HPLC方法的开发,该方法可检测(i)两个DHR-3'-dGMP和四个DHR-3'-dAMP加合物,以及(ii)一组八个DHR和体内衍生的DNA加合物。该方法涉及(1)DHR-3'-dGMP,DHR-3'-dAMP和DHR-3',5'-dG-双磷酸酯标准品的合成及其质量表征和(1)H NMR光谱分析,(2)开发用于酶促DNA消化,加合物富集和(32)P后标记的最佳条件,以及(3)最佳HPLC条件的开发。使用这种方法,