甘草次酸醇质体水凝胶贴剂的制备与透皮给药研究

目的探讨甘草次酸醇质体水凝胶贴剂的制备方法,并考察其体外透皮给药的规律与特点。方法注入法制备甘草次酸醇质体,考察其包封率、粒径与表面电位,再制备成水凝胶贴剂;采用改良Franz立式扩散池,HPLC法测定甘草次酸含量,评价甘草次酸醇质体水凝胶贴剂的体外透皮给药规律与特点。结果甘草次酸醇质体外观为圆球形或椭球形,具有层状结构;其对于甘草次酸的包封率为(75.63±1.86)%,粒径为(106.2±20.54)nm,表面电位为(-41.3±2.8)mV。与甘草次酸水凝胶贴剂比较,甘草次酸醇质体水凝胶贴剂的透皮给药速率与累积渗透量高于甘草次酸水凝胶贴剂,24 h时甘草次酸醇质体水凝胶贴剂的累积渗透量是甘草次酸水凝胶贴剂的5.55倍,二者之间差异有统计学意义(t-test,P<0.01)。结论甘草次酸制备成醇质体后能够显著提高水凝胶贴剂的透皮给药效果,表明醇质体水凝胶贴剂是甘草次酸透皮给药的一个理想的载体。

Preparation and in vitro percutaneous permeation profile of glycyrrhetinic acid ethosome hydrogel patch

Objective To explore the preparation method of glycyrrhetinic acid ethosome(GAE) hydrogel patch and to evaluate its characteristics during in vitro transdermal drug delivery.Methods GAE was prepared by ethanol infusion method,and its entrapment efficiency,size and surface potential were investigated.Then GAE was used to prepare the hydrogel patch.The amount of penetrated glycyrrhetinic acid was determined by HPLC on modified Franz diffusion cells,and then the in vitro transdermal drug delivery of the prepar...