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LC-MS/MS测定人血浆中甘草次酸的浓度及其在药代动力学中的应用

张静, 张蕊, 魏春敏, 袁桂艳, 刘晓燕, 王本杰, 郭瑞臣*   

  1. 1. 山东大学 药学院, 山东 济南 250012
    2. 山东大学 齐鲁医院 临床药理研究所, 山东 济南 250012
  • 收稿日期:2011-03-06 修回日期:2011-05-30 出版日期:2011-07-01 发布日期:2011-07-01
  • 通讯作者: 郭瑞臣*

A method for the quantitative determination of glycyrrhetic acid in plasma by LC-MS/MS and its application in a pharmacokinetic study of ammonium glycyrrhetate

Jing Zhang, Rui Zhang, Chun-Min Wei, Gui-Yan Yuan, Xiao-Yan Liu, Ben-Jie Wang, Rui-Chen Guo*   

  1. 1. School of Pharmacy, Shandong University, Jinan 250012, China
    2. Institute of Clinical Pharmacology, Qilu Hospital of Shandong University, Jinan 250012, China
  • Received:2011-03-06 Revised:2011-05-30 Online:2011-07-01 Published:2011-07-01
  • Contact: Rui-Chen Guo*

摘要:

建立一种灵敏度高、重现性好的高效液相色谱-质谱法 (LC-MS/MS) 测定人血浆中甘草次酸的浓度, 并用于甘草酸铵的人体药动学研究。采用液-液萃取法进行血浆样品预处理, 色谱柱为C18 , 流动相为乙腈-5 mmol/L乙酸铵 (70:30, v/v), 流速0.8 mL/min。采用负离子模式, 多离子监测 (MRM) 方式进行检测, 甘草次酸与内标甲砜霉素离子对质核比 (m/z) 分别为469.3→355.3354.1→185.0。方法学验证表明此方法特异性强、灵敏度高、准确度与精密度符合要求, 线性范围为0.5-500 ng/mL, 血浆样本经两次冻融及冷冻稳定良好, 可以用于甘草酸铵的人体药代动力学研究。健康志愿者口服75 mg甘草酸铵后, 活性代谢产物甘草次酸的药动学参数如下: AUC0-t (3457.26±1999.01) ng·h/mLAUC0-∞ (3708.85±2428.36) ng·h/mLMRT0-t (19.69±4.03) hMRT0-∞ (22.83±8.45) ht1/2Z (11.71±7.77) hTmax (13.40±4.84) hCLz/F (29.17±19.82) L/hVz/F (487.38±518.07) LCmax (215.85±99.88) ng/mL

关键词: 甘草次酸, 药代动力学, 高效液相色谱-串联质谱法, 甘草酸铵

Abstract: A simple and rapid liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed and validated for the quantitative determination of glycyrrhetic acid (GA), metabolite of glycyrrhizin and glycyrrhetate, in human plasma. GA and internal standard (IS, thiamphenicol) were separated on a C18 column by elution with acetonitrile-ammonium acetate solution (5 mmol/L) (70:30, v/v) after a simple liquid-liquid extraction with ethyl acetate. The flow rate was 0.8 mL/min. They were detected by tandem mass spectrometry in the negative ion multiple reaction monitoring (MRM) mode with ion transitions of m/z 469.3→355.3 for GA and m/z 354.1→185.0 for IS. The calibration curve was linear over GA concentration range of 0.5-500 ng/mL (r2>0.99), with intra- and inter- day precisions (RSD) of less than 7.1%, and mean extraction recovery of 74.3%. The method was used for the pharmacokinetic study of ammonium glycyrrhetate after its oral administration of a single dose of 75 mg ammonium glycyrrhetate tablet in humans. The main pharmacokinetic parameters of GA were as follows: AUC0-t (3457.26±1999.01) ng·h/mL; AUC0-∞ (3708.85±2428.36) ng·h/mL; MRT0-t (19.69±4.03) h; MRT0-∞ (22.83±8.45) h; t1/2Z (11.71±7.77) h; Tmax (13.40±4.84) h; CLz/F (29.17±19.82) L/h; Vz/F (487.38±518.07) L; Cmax (215.85±99.88) ng/mL.

Key words: Glycyrrhetic acid, Pharmacokinetics, LC-MS/MS, Ammonium glycyrrhetate

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*Corresponding author. Tel.: 86-531-82169636; Fax: 86-531-86109975