作者:Mingyao Wang、Edward J. McIntee、Guang Cheng、Yongli Shi、Peter W. Villalta、Stephen S. Hecht
DOI:10.1021/tx000118t
日期:2000.11.1
anosine (11). Adduct 9 has been previously identified in reactions of crotonaldehyde with DNA. However, the distribution of diastereomers was different in the acetaldehyde and crotonaldehyde reactions, indicating that the formation of 9 from acetaldehyde does not proceed through crotonaldehyde. Adduct 12 is an interstrand cross-link. Although previous evidence indicates the formation of cross-links
乙醛是一种诱变剂和致癌物,在人类环境中广泛存在,有时数量很多,但对其与DNA的反应知之甚少。在这项研究中,我们确定了三种新型的稳定乙醛DNA加合物,包括链间交联。这些是除先前表征的N(2)-亚乙基二氧鸟苷之外形成的。使乙醛与小牛胸腺DNA或脱氧鸟苷反应。分离出DNA,并进行酶水解。在某些情况下,首先用NaBH(3)CN处理DNA。通过HPLC分析反应混合物,并分离加合物并通过UV,(1)H NMR和MS表征。主要的加合物是N(2)-乙二氧基脱氧鸟苷(1),经NaBH(3)CN处理DNA后被鉴定为N(2)-乙基脱氧鸟苷(7)。新的乙醛加合物是3-(2-脱氧核糖-1-基)-5,6,7,8-四氢-8-羟基-6-甲基嘧啶[1,2-a]嘌呤-10(3H)one(9 ),3-(2-deoxyribos-1-yl)-5,6,7,8-tetrahydro-8-(N(2)-deoxyguanosyl + ++)-6-methylpyrimido