Alcohol Dehydrogenase- and Rat Liver Cytosol-Dependent Bioactivation of 1-Chloro-2-hydroxy-3-butene to 1-Chloro-3-buten-2-one, a Bifunctional Alkylating Agent
作者:Adnan A. Elfarra、Xin-Yu Zhang
DOI:10.1021/tx300369b
日期:2012.11.19
After CBO was incubated with freshly isolated mouse erythrocytes, globin dimers were detected using SDS-PAGE and silver staining, providing evidence that CBO can act as a protein cross-linking agent. Collectively, the results provide clear evidence for CHB bioactivation by ADH and rat liver cytosol to yield CBO. The bifunctional alkylating ability of CBO suggests that it may play a role in BD toxicity and/or
1,3-丁二烯 (BD) 是一种空气污染物,其毒性和致癌性被认为主要由其反应性代谢物 3,4-环氧-1-丁烯和 1,2,3,4-二环氧丁烷介导,它们在肝脏和细胞色素 P450s 的肝外组织。骨髓和免疫细胞中一种可能的替代代谢途径是在过氧化氢和氯离子存在下,髓过氧化物酶将 BD 转化为氯化烯丙醇 1-氯-2-羟基-3-丁烯 (CHB)。在本研究中,我们研究了酒精脱氢酶 (ADH) 在体外生理条件下(pH 7.4,37°C)对 CHB 的体外生物活化。结果为 CHB 被纯化的马肝 ADH 和大鼠肝细胞质转化为 1-chloro-3-buten-2-one (CBO) 提供了明确的证据。S -glutathionyl)butan-2-one ( 3 ) 和 1-( S -glutathionyl)-3-buten-2-one ( 4 )] 和一种 CBO-di-GSH 缀合物 [1,4- bis