Bioactivation of Benzylamine to Reactive Intermediates in Rodents: Formation of Glutathione, Glutamate, and Peptide Conjugates
作者:Abdul E. Mutlib、Patricia Dickenson、Shiang-Yuan Chen、Robert J. Espina、J. Scott Daniels、Liang-Shang Gan
DOI:10.1021/tx020063q
日期:2002.9.1
pathways, including those independent of P450, were found to produce these intermediates. A previously undocumented pathway included the formation of a new carbon-nitrogen bond that led to a potentially reactive intermediate, Ar-CH(2)-NH(CO)-X, capable of interacting with various nucleophiles. The origin of this reactive intermediate is postulated to occur via the formation of either a formamide or carbamic
在大鼠中研究了苄胺的体内和体外处置。苄胺仅在很小的程度上被大鼠肝脏的亚细胞部分代谢。相反,它在大鼠体内被广泛代谢。用稳定的同位素标记的苄胺进行的体内研究能够快速质谱鉴定大鼠胆汁和尿液中存在的代谢物。苄胺的主要代谢产物是由甘氨酸与苯甲酸结合形成的马尿酸。LC / MS分析从d(0):d(7)-或d(0):d(2)-苄胺1:1等摩尔混合物中摄取的大鼠胆汁和尿液显示,在其中存在一些谷胱甘肽加合物除马尿酸代谢物外。各种谷胱甘肽加合物的存在表明苄胺被代谢为许多反应性中间体。发现各种代谢途径,包括独立于P450的那些途径,都可产生这些中间体。以前未记录的途径包括形成新的碳-氮键,该键导致潜在的反应性中间体Ar-CH(2)-NH(CO)-X,能够与各种亲核试剂相互作用。假定该反应性中间体的起源是通过甲酰胺或氨基甲酸代谢物的形成而发生的。该中间体Ar-CH(2)-NH(CO)-X与亲核试剂反应生成的代谢产物包括S-