代谢
对插管大鼠胆汁、尿液和粪便中的代谢物进行分析,共鉴定出包括母体在内的13种化合物,这些化合物占放射性标记剂量的43-60%。男性和女性之间的代谢物轮廓相似。尿液中鉴定出总共11种代谢物,大多数的浓度低于给药剂量的2%。胆汁中发现了总共8种代谢物,主要的代谢物是羟基化谷胱甘肽结合物的异构体和一个葡萄糖醛酸结合物。母体化合物在尿液或胆汁中未检测到。根据排泄物中鉴定的成分,大鼠对benthiavalicarb的代谢主要涉及苯环的羟基化,随后进行葡萄糖醛酸结合或谷胱甘肽结合,以及苯环的羟基化,随后降解谷胱甘肽部分,导致存在多种小量的代谢物。缬氨酸侧链的断裂和羟基化也在一定程度上发生。母体(仅在粪便中排泄)和代谢物M15(尿液和粪便)和M18(仅在尿液中)也是血浆、肝脏和肾脏中检测到的主要成分。
Analysis of the metabolites in bile, urine, and feces of cannulated rats identified a total of 13 compounds, including the parent, which accounted for 43-60% of the radiolabeled dose. The metabolite profile was similar between the sexes. A total of 11 metabolites were identified in the urine, most present in concentrations <2% of the administered dose. A total of 8 metabolites were found in the bile, with the principal metabolites being isomers of hydroxylated glutathione conjugates and a glucuronide conjugate. Parent compound was not present in the urine or bile. Based upon the components identified in excreta, the metabolism of benthiavalicarb in rats primarily involves either hydroxylation of the phenyl ring followed by glucuronic acid conjugation or glutathione conjugation and hydroxylation of the phenyl ring with subsequent degradation of the glutathione moiety, resulting in a variety of metabolites present in small quantities. Cleavage and hydroxylation of the valyl side chain also occurs to a limited extent. Parent (excreted in feces only) and metabolites, M15 (urine and feces) and M18 (urine only), were also the principal components detected in plasma, liver, and kidneys.
来源:Hazardous Substances Data Bank (HSDB)