Isotope dilution LC/ESI−-MS-MS quantitation of urinary 1,4-bis(N-acetyl-S-cysteinyl)-2-butanone in mice and rats as the biomarker of 1-chloro-2-hydroxy-3-butene, an in vitro metabolite of 1,3-butadiene
作者:Wen-Jing Wu、Wei-Feng Tang、Ming-Hui Xiang、Jianshe Yan、Xiumei Cao、Chang-Hui Zhou、Yan Chang、Jing Xi、Yi-Yi Cao、Yang Luan、Xin-Yu Zhang
DOI:10.1016/j.cbi.2019.108760
日期:2019.9
vivo biotransformation of CHB into CBO-derived mercapturic acids. Because the reaction of CBO with N-acetyl-l-cysteine yields two products, 1,4-bis(N-acetyl-S-cysteinyl)-2-butanone (NC1) and 1-chloro-4-(N-acetyl-S-cysteinyl)-2-butanone (NC2), we first developed an isotope dilution LC/ESI−-MS-MS method to quantitate urinary NC1 and NC2, and then determined their concentrations in urine of C57BL/6 mice
1-氯-2-羟基-3-丁烯(CHB)是1,3-丁二烯(一种致癌性空气污染物)的可能代谢物。为了证明其在体内的形成,需要开发一种实用的生物标志物和相应的分析方法。CHB可以进行乙醇脱氢酶和细胞色素P450酶(P450)介导的氧化,生成1-氯-3-丁烯-2-酮(CBO),该化合物容易形成谷胱甘肽共轭物。我们假设,CBO衍生的巯基酸是CBO-谷胱甘肽结合物的预期生物转化产物,可以用作CHB生物标志物。因此,在本研究中,我们研究了CHB体内生物转化为CBO衍生的巯基酸。因为CBO与N-乙酰基-1-半胱氨酸的反应产生两个产物1,4-双(Ñ乙酰基小号-cysteinyl)-2-丁酮(NC1)和1-氯-4-(Ñ乙酰基小号-cysteinyl)-2-丁酮(NC2),我们首先开发了一种同位素稀释LC / ESI - -MS-MS方法定量尿液NC1和NC2,然后测定C57BL / 6小鼠和施行CHB的Spra