LC-MS/MS法测定人血浆中甘草次酸及其临床药代动力学研究

目的建立人血浆中甘草次酸的LC-MS/MS测定方法,研究男性健康志愿者单剂量服用甘草酸二铵胶囊,其代谢产物甘草次酸体内药代动力学行为。方法健康男性志愿者单剂量口服甘草酸二铵胶囊150 mg,血浆样品经乙酸乙酯提取,进行LC-MS/MS分析。色谱柱为Agilent ZORBAXSB C18(3.0×100 mm,5μm),流动相为甲醇∶乙腈∶醋酸铵缓冲液(5 mmol.L-1醋酸铵,0.2%冰醋酸)(15∶60∶25,V/V/V),检测离子为m/z469.4/355.2(甘草次酸)、m/z358.9/279.9(内标泼尼松龙)。测定甘草次酸血药浓度,计算其药代动力学参数。结果在1.5～192μg.L-1内,甘草次酸与内标的峰面积比值与浓度的线性关系良好,定量限为1.5μg.L-1,提取回收率为77.14%～83.64%。人体中甘草次酸药代动力学参数:Cmax为(73.85±25.25)μg.L-1,Tmax为(11.50±3.07)h,T21β为(11.82±3.56)h,AUC0-60为(1252.49±489.06)μg.h.L-1。结论建立的LC-MS/MS分析方法准确灵敏,适于临床药代动力学研究。口服甘草酸二铵胶囊,其代谢产物甘草次酸在体内的药代动力学特点是达峰时间长,约占受试者总人数50%的药时曲线有双峰现象。

A sensitive LC/MS/MS method for the determination of glycyrrhetic acid in human plasma and application to pharmacokinetic study

Aim To establish a LC-MS-MS method for the determination of glycyrrhetic acid(GA),a major metabolite of glycyrrhizin(GLY) in human plasma,and to investigate the pharmacokinetics of GA in Glycyrrhizinate Capsules in Chinese healthy volunteers.Methods Glycyrrhizinate Capsules were orally administrated to healthy volunteers at a single dose of 150 mg.Blood samples were then collected and extracted by ethyl acetate.GA and internal standard(IS),prednisolone,were subjected to LC-MS/MS analysis with electro-spray ...