欢迎访问《中国临床药理学与治疗学》杂志官方网站,今天是

中国临床药理学与治疗学 ›› 2004, Vol. 9 ›› Issue (3): 257-260.

• 研究原著 • 上一篇    下一篇

Caco-2 细胞对人参皂苷Rg3 的摄取及代谢研究

谢海棠, 王广基, 赵小辰1, 孙建国   

  1. 江苏省药代动力学重点实验室, 1中国药科大学新药筛选中心, 南京210009, 江苏
  • 收稿日期:2004-02-09 修回日期:2004-02-27 出版日期:2004-03-26 发布日期:2020-11-21
  • 通讯作者: 王广基, 男, 教授, 博士生导师, 研究方向:药代动力学。Tel:025-83271544  E-mail:gjwang@cpu.edu.cn
  • 作者简介:谢海棠, 女, 医学硕士, 博士在读, 研究方向:药代动力学。Tel:025-85391035  E-mail:xiehaitang@hotmail.com
  • 基金资助:
    国家自然科学基金项目(№39970862);中国药科大学青年教师科技基金(№E0325) 及江苏省药代动力学重点实验室资助项目。

Study on uptake and metabolism of ginsenoside Rg3

XIE Hai-Tang, WANG Guang-Ji, ZHAO Xiao-Chen, SUN Jian-Guo   

  1. Key Laboratory of Pharmacokinetics, China Pharmaceutical University, Nanjing 210009, Jiangsu, China
  • Received:2004-02-09 Revised:2004-02-27 Online:2004-03-26 Published:2020-11-21

摘要: 目的:研究Caco-2 细胞对人参皂苷Rg3 的摄取、代谢及其动力学变化。方法:采用液相色谱质谱联用(HPLC-MS) 检测方法测定细胞中Rg3 及其代谢产物Rh2 药物浓度, 考察时间、pH 值、温度、药物浓度及抑制剂对Rg3 摄取速率及代谢物产量的影响。结果:Rg3在Caco-2细胞上的摄取是时间及浓度依赖性的, 其被动转运系数Kd 为0.07 nmol·h-1 ·mg-1prot;最大摄取速率Vmax 为3.32 nmol·h-1·mg-1 prot;Km是16.31 μmol·L-1 。加入代谢抑制剂叠氮化钠及2, 4-二硝基酚时摄取速率明显降低(与对照组相比P <0.01) 。结论:Caco-2 细胞模型适用于人参皂苷的吸收机制研究;Rg3 在肠道中的代谢为其生物利用度低的原因之一。

关键词: Caco-2 细胞, 人参皂苷Rg3, 摄取, 代谢, 液质联用

Abstract: AIM: To study the uptake and metabolism of ginsenoside Rg3 (Rg3) in caco-2 cells and its kinetic profiles.METHODS: Liquid chromatography mass determination (HPLC-MS) was applied to determine Rg3 and its metabolite Rh2 concentrations in Caco-2 cells at different pH, temperature, concentration levels with the presence or absence of inhibitors.RESULTS: Rg3 uptake was time and concentration dependent, and its uptake rates were markedly reduced by metabolic inhibitors (sodium azide and 2, 4-dinitrophenol) and were influenced by low temperature.This indicated the absorption process was energy-dependent.Kinetic analysis showed that a non-saturable component (Kd 0.07 nmol ·h -1 · mg -1prot) and an active transport system with a Km of 16.31 μmol·L -1 and a Vmax of 3.32 nmol·h -1·mg -1prot were responsible for Rg3 uptake.CONCLUSION: Caco-2 cells are suitable for the study of ginsenoside absorption mechanism and intestinal metabolism of ginsenoside Rg3 was partly contributed to its low bioavailability.

Key words: Caco-2 cells, ginsenoside Rg3, uptake, metabolism, liquid chromatography mass determination

中图分类号: