人参皂苷Rg_1经PEG修饰前后的组织分布研究

Tissue distribution of ginsenoside Rg_1 before and after modification by PEG

目的:探讨人参皂苷Rg1经PEG修饰后在小鼠的组织靶向分布情况。方法:取SD小鼠随机分为2组,分别给予尾静脉注射Rg1和PEG-Rg1,于不同时间点取血并取各组织脏器,采用UPLC对样品中指标成分人参皂苷Rg1进行含量测定,计算Rg1在各组织分布的靶向系数,观察比较2组在小鼠体内的组织靶向分布情况。结果:人参皂苷Rg1组在小鼠体内各组织分布的AUC大小顺序为肝、肾、肺、心、脾,肝靶向系数为2.01;PEG修饰组在小鼠体内各组织的AUC大小顺序为肾、肝、肺、心、脾,肝靶向系数为9.21。结论:PEG修饰后,Rg1对肝组织的靶向选择性增强,同时对肾、肺组织的靶向选择性也得到增强。

Objective： To investigate targeted distribution of ginsenoside Rg1 in mice tissues before and alter modification by the PEG. Method： SD mice were randomly divided into two groups and given Rg1 and PEG-Rg1 by intravenous injection respectively. Their samples of blood and organ tissues were taken at different time points. The content of Rg1 in samples were determined by UPLC and used as indicator to observe the targeted distribution of Rg1 in mice tissues. Result： The AUC of ginsenoside Rg1 in tissues of the Rg1 group were in the order of liver, kidney, lung, heart and spleen, with the liver targeting coefficient was of 2.01. While the AUC of ginsenoside Rg1 in tissues of the PEG-modified group were in the order of the kidney, liver, lung, heart, spleen, with the liver targe- ting coetficient was of 9.21. Conclusion： PEG modified Rg1 can increase Rg1 ＇s targeting selectivity to the liver, kidney and lung in miee.