Metabolism of Anethole Dithiolethione by Rat and Human Liver Microsomes: Formation of Various Products Deriving from Its<i>O</i>-Demethylation and<i>S</i>-Oxidation. Involvement of Cytochromes P450 and Flavin Monooxygenases in These Pathways
作者:Martin Dulac、Amor Sassi、Citra Nagarathinan、Marie-Odile Christen、Patrick M. Dansette、Daniel Mansuy、Jean-Luc Boucher
DOI:10.1124/dmd.118.082545
日期:2018.10
A study of the metabolism of anethole dithiolethione (ADT, 5-(p-methoxyphenyl)-3 H -1,2-dithiole-3-thione) by rat and human liver microsomes showed the formation of the corresponding S -oxide and the S -oxide of desmethyl-ADT (dmADT, 5-(p-hydroxyphenyl)-3 H -1,2-dithiole-3-thione), and of p-methoxy-acetophenone (pMA) and p-hydroxy-acetophenone (pHA), in addition to the previously described metabolites, dmADT, anethole dithiolone (ADO, 5-(p-methoxyphenyl)-3 H -1,2-dithiole-3-one) and its demethylated derivative dmADO [5-(p-hydroxyphenyl)-3 H -1,2-dithiole-3-one]. The microsomal metabolism of ADO under identical conditions led to dmADO and to pMA and pHA. The metabolites of ADT derive from two competing oxidative pathways: an O -demethylation catalyzed by cytochromes P450 and an S -oxidation mainly catalyzed by flavin-dependent monooxygenases (FMO) and, to a minor extent, by CYP enzymes. The most active human CYP enzymes for ADT demethylation appeared to be CYP1A1, 1A2, 1B1, 2C9, 2C19, and 2E1. ADT S -oxidation is catalyzed by FMO 1 and 3, and to a minor extent by CYP enzymes such as CYP3A4.
对大鼠和人类肝微粒体中二硫代乙酰苯胺(ADT,5-(对甲氧基苯基)-3H-1,2-二硫代-3-硫酮)代谢的研究显示,除了先前已描述的代谢物dmADT(二甲基-ADT,5-(对羟基苯基)-3H-1,2-二硫代-3-硫酮)、二硫代乙酰苯酮(ADO,5-(对甲氧基苯基)-3H-1,2-二硫代-3-酮)及其去甲基化衍生物dmADO(5-(对羟基苯基)-3H-1,2-二硫代-3-酮)外,还形成了相应的S-氧化物及去甲基-ADT的S-氧化物(dmADT)、对甲氧基乙酰苯酮(pMA)和对羟基乙酰苯酮(pHA)。在相同条件下,ADO的微粒体代谢也导致了dmADO、pMA和pHA的生成。ADT的代谢物来自两个竞争性的氧化途径:一种由细胞色素P450催化的O-去甲基化,以及主要由黄素依赖单氧化酶(FMO)催化的S-氧化,CYP酶在其中也起到小部分作用。最活跃的人类CYP酶进行ADT去甲基化的包括CYP1A1、1A2、1B1、2C9、2C19和2E1。ADT的S-氧化由FMO 1和3催化,CYP酶如CYP3A4在其中的作用较小。