Characterization of the Major Purine and Pyrimidine Adducts Formed after Incubations of 1-Chloro-3-buten-2-one with Single-/Double-Stranded DNA and Human Cells
作者:Ling-Yan Liu、Jin Zheng、Cong Kong、Jing An、Ying-Xin Yu、Xin-Yu Zhang、Adnan A. Elfarra
DOI:10.1021/acs.chemrestox.6b00282
日期:2017.2.20
that have been attributed in part to its reactivity toward DNA. In an effort to identify the DNA adducts of CBO, we characterized the CBO reactions with 2'-deoxyguanosine (dG), 2'-deoxycytidine (dC), and 2'-deoxyadenosine (dA) under in vitro physiological conditions (pH 7.4, 37 °C). In the present study, we investigated the CBO reaction with 2'-deoxythymidine (dT) and compared the rate constants of the
先前我们已经表明1-氯-3-丁烯-2-酮(CBO),一种潜在的1,3-丁二烯(BD)的反应性代谢产物,显示出强大的细胞毒性和遗传毒性,这部分归因于其对DNA的反应性。为了确定CBO的DNA加合物,我们在体外生理条件下(pH 7.4, 37°C)。在本研究中,我们研究了CBO与2'-脱氧胸苷(dT)的反应,并比较了CBO与dA,dC,dG和dT在单个和混合核苷水平上的反应速率常数。在通过酸或酶水解DNA释放加合物后,我们还使用HPLC和UV检测技术研究了CBO与单链和双链DNA的反应。与核苷反应和速率常数实验的结果一致,酸水解后,检测到的主要DNA加合物被确定为1,N6-(1-羟基-1-氯甲基丙烷-1,3-二基)腺嘌呤(A-2D)。然后是N7-(4-氯-3-氧丁基)鸟嘌呤(CG-2H)和少量1,N6-(1-羟基-1-羟甲基丙烷-1,3-二基)腺嘌呤(A-1D) 。酶水解后,1,N6-(1-羟基-1-羟甲基丙烷-1