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中国临床药理学与治疗学 ›› 2009, Vol. 14 ›› Issue (11): 1275-1280.

• 定量药理学 • 上一篇    下一篇

五味子甲素对大鼠肝微粒体CYP3A 活性的影响

苏明威1,2, 李维亮1, 刘慧明1, 辛华雯1, 王乃平2   

  1. 1广州军区武汉总医院临床药理科, 武汉430070, 湖北;
    2广西中医学院, 南宁530001, 广西
  • 收稿日期:2009-07-27 修回日期:2009-10-23 发布日期:2020-10-26
  • 作者简介:苏明威, 男, 硕士研究生在读, 研究方向:临床药理学。Tel:15871357849 E-mail:suming3492@163.com
  • 基金资助:
    湖北省卫生厅科研基金资助(JX3B38)

Effects of schizandrin A on the activity of CYP3A in rat liver microsomes

SU Ming-wei1,2, LI Wei-liang1, LIU Hui-ming1, XIN Hua-wen1, WANG Nai-ping2   

  1. 1Wuhan General Hospital of Guangzhou Military Region, Wuhan 430070, Hubei, China;
    2Guangxi College of Traditional Chinese Medincine, Nanning 530001, Guangxi, China
  • Received:2009-07-27 Revised:2009-10-23 Published:2020-10-26

摘要: 目的:通过体外药物代谢实验探讨五味子甲素对CYP3A 活性的影响。方法:以大鼠肝微粒体为载体, 选取咪达唑仑(MDZ)作为药物“探针”,建立高效液相色谱(HPLC)检测方法, 体外给药测定五味子甲素对MDZ 的IC50 值以及相关酶动力学参数。结果:孵育体系内源性物质不干扰测定,方法快捷、稳定、灵敏度高。在肝微粒中, 五味子甲素对MDZ 的IC50 浓度为6.26 μmol/mL, 相关酶动力学参数:Km = 15.77 μmol/L, Ki =5.50 μmol/mL。结论:五味子甲素对大鼠肝微粒体CYP3A 活性具有抑制作用, 其抑制作用为混合型, 即:非竞争与反竞争抑制。

关键词: CYP3A, 五味子甲素, 咪达唑仑, 高效液相色谱, 酶动力学参数

Abstract: AIM: To study the effects of schizandrin A on CYP3A by in vitro drug metabolism experiments. METHODS: Midazolam (MDZ)was adopted as a drug “probe” and a detection method of high-performance liquid chromatography (HPLC)was established, the rat liver microsome was as a carrier.The IC50 value of schizandrin A by in vitro administration and related enzyme kinetic parameters on CYP3A were detected. RESULTS: The endogenous substances did not interfere with the determination in the incubation system. The method was fast, stable and had high sensitivity. The IC50 of schizandrin A on MDZ metabolism in liver microsomes was 6.26 μmol/mL, and the enzyme kinetic parameters were as follows:Km =15.77 μmol/L, Ki =5.5 μmol/mL. CONCLUSION: Schizandrin A is able to inhibit CYP3A activity in rat liver microsomes. The inhibition is mixed type, non-competitive and anticompetitive inhibition.

Key words: CYP3A, schizandrin A, midazolam, HPLC, enzyme kinetic parameters

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