超高效液相色谱-质谱联用法分析川陈皮素在大鼠体内的代谢产物

采用超高效液相色谱-三重四级杆质谱联用(UPLC-MS/MS)技术分析了川陈皮素在大鼠体内的代谢产物。通过比较给药前后大鼠血浆、胆汁和尿液样品的总离子流色谱图,观察到川陈皮素的7个代谢产物。进一步通过综合分析代谢产物的色谱保留行为、一级和二级质谱信息,推定其中3个为I相代谢产物,分别为川陈皮素脱去一个和两个甲基而得。另外4个被推定为II相代谢产物,分别为I相代谢产物进一步通过硫酸化和葡糖醛酸化生成。上述产物中,4个Ⅱ相代谢产物属首次报道。结果提示了Ⅱ相代谢尤其是葡糖醛酸化在川陈皮素代谢通路中的重要作用,提示葡糖醛酸转移酶的基因多态性以及相关的药物相互作用引起的潜在的川陈皮素活性及毒副作用的变化值得进一步的关注。

Identification of metabolites of nobiletin in rats using ultra-performance liquid chromatography coupled with triple-quadrupole mass spectrometry

In this study, metabolism of nobiletin in rats was studied using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS). As a result, seven major metabolites were found in bile, urine and serum of rats. Three phase I products were assigned to be demethyl and di-demethyl products, and other four phase II products were assigned to be glucuronic and sulfonic conjugates. The four phase II metabolites were reported for the first time. Among the metabolites found in the present study, the glucuronic conjugates of demethyl-nobiletin played a predominant role in the metabolic pathway, indicating that its potential role for glucuronidation-related factors, such as gene polymorphism, drug-drug interaction, etc., in changing the active and toxic effect of nobiletin and that it should be paid more attention in further development.