荷叶多成分整体的肠渗透性研究

中药生物药剂学分类系统(biopharmaceutics classification system of Chinese materia medica,CMMBCS)研究中,多成分同时测定时需要考虑成分间吸收过程中的相互作用。该研究以荷叶为研究载体,采用离体翻转肠囊实验方法,对荷叶中的多成分在肠道的吸收情况进行研究,并对已知成分进行定量分析。实验表明荷叶提取物中有19个成分可透过肠壁吸收,各成分吸收强弱差异比较大,3个浓度下已知成分荷叶碱的表观渗透系数在1×10-5~1×10-6cm·s-1数量级,其他已知成分的表观渗透系数数量级分别为芦丁1×10-6~1×10-7cm·s-1,金丝桃苷1×10-6cm·s-1,异槲皮苷1×10-6~1×10-7cm·s-1,紫云英苷1×10-6~1×10-7cm·s-1,在多成分吸收影响下,几个成分均属于肠渗透性差的成分。这为下一步对不同类别成分分别进行相关靶点研究奠定基础。

Overall intestinal permeability of multiple components in lotus leaves

In the study of biopharmaceutics classification system of Chinese materia medica (CMMBCS), the interactions of multiple components in the absorption should be taken into consideration in simultaneous multi-component determination. To investigate the absorption of multiple components, the in vitro everted gut sac model was used in this study, wtih lotus leaves as the research object. Aquantitative analysis was also carried out for the known components in this study. Totally 19 components in lotus extracts were absorbed by the intestinal tract, the P_app levels of the known components were nuciferine (1×10^-5-1×10^-6 cm·s^-1), rutin (1×10^-6-1×10^-7 cm·s^-1), hyperoside (1×10^-6 cm·s^-1), isoquercitrin (1×10^-6-1×10^-7 cm·s^-1) and astragalin (1×10^-6-1×10^-7 cm·s^-1), respectively. These components showed a low permeability under a multi-component environment. This study was carried out to lay a foundation for further relevant target studiesfor different categories of components.