小鼠血浆中马钱素的高效液相色谱测定法及药代动力学

目的建立测定小鼠血浆中马钱素浓度的高效液相色谱法,并研究马钱素在小鼠体内的药代动力学。方法色谱柱为C18柱,流动相甲醇-水(30∶70),流速为0.8 mL·min^-1,检测波长240 nm;血浆样品用固相萃取法预处理。结果线性范围0.01～5.00 μg·mL^-1。日内RSD<10%,日间RSD<15%,回收率86.0%～91.5%,最低定量浓度为10 ng·mL^-1。ig给药0.5 h后血浆药物浓度达峰值,C_max为6.8 μg·mL^-1,_t1/2α为26.1 min,_t1/2β为29.01 min。结论 该方法灵敏度高,操作方便,适用于马钱素的药代动力学研究;本品口服吸收快消除也快。

RP-HPLC DETERMINATION OF LOGANIN IN MOUSE PLASMA AND ITS PHARMACOKINETICS

AIM: To develop a method for determination of loganin in mouse plasma by using high-performance liquid chromatography. The method was employed to study pharmacokinetics of loganin. METHODS: An RP-C18 was used as the stationary phase. The mobile phase consisted of methanol-water (30:70), at the flow-rate of 0.8 mL.min-1. The UV absorbance detector was set at 240 nm. Plasma samples were treated with solid phase extraction. RESULTS: The recovery of loganin in mouse plasma was 86.0%-91.5%. The calibration curve in plasma was linear over the range of 0.01-5.00 micrograms.mL-1. The limit of quantitation was 10 ng.mL-1. The RSDs of intra-day and inter-day (n = 5) were less than 15%. The pharmacokinetic parameters were Cmax = 6.8 micrograms.mL-1, Tmax = 30 min, T1/2 alpha = 26.1 min, T1/2 beta = 29.01 min. CONCLUSION: The method is accurate, sensitive and suitable for pharmcokinetic study of loganin. The absorption and elimination of loganin were rapid after ig in mice.