UPLC-MS法测定大鼠血浆中积雪草苷的浓度及其药代动力学研究

目的建立测定积雪草苷血浆药物浓度的超高效液相色谱-电喷雾离子化-质谱(UPLC-ESI-MS)联用的分析方法,探讨其在大鼠体内的药动学。方法SD大鼠8只,单剂量静注(40mg·kg-1)积雪草苷,用UPLC-MS法测定给药后的血浆中药物浓度,并用DAS软件求算其药代动力学参数。结果积雪草苷的血药浓度在0.038～7.6mg·L-1范围内线性关系良好,最低检测限为38μg·L-1,提取回收率大于95%,日间、日内RSD均小于10%。大鼠单剂量静注积雪草苷40mg·kg-1后,血药浓度-时间曲线呈二室模型。主要药动学参数AUC(0-t)、T12β、CL、Vd分别为:(81443.67±57156.81)μg·L-1·min-1、(23.44±9.60)min、(0.19±0.07)L·min-1·kg-1、(8.92±6.68)L·kg-1。结论该方法操作简便、快速、灵敏、专属性强,可用于积雪草苷的体内大批量样品定量分析及药代动力学研究。

Pharmacokinetic study of asiaticoside in rat plasma by UPLC-MS

Aim To establish an UPLC-ESI-MS method for determination of asiaticoside and investigate its application to pharmacokinetic study in rats.Methods Eight rats were given 40 mg·kg~(-1) asiaticoside iv respectively.Drug plasma concentration was determined by UPLC-ESI-MS.Pharmacokinetic parameters were evaluated.Results Calibration curves were linear over 0.038～7.6 mg·L~(-1) and LLOQ was 38 μg·L~(-1),the recoveries of asiaticoside from plasma were larger than 95%,and RSD of inter-day and intra-day assay were below 10%.After iv administration of 40 mg·kg~(-1) asiaticoside,the pharmacokinetic parameters of AUC(0-t),T(1)/(2)β,CL,Vd were (81 443.67±57 156.81) μg·L~(-1)·min~(-1),(23.44±9.60) min,(0.19±0.07) L·min~(-1)·kg~(-1),(8.92±6.68) L·kg~(-1),respectively.Conclusion The method described in this report was sensitive and specific,and suitable for pharmacokinetic studies of asiaticoside in rats.