鬼臼毒素醇质体的体外经皮渗透特性研究

目的研究鬼臼毒素醇质体经皮渗透特性。方法通过体外经皮渗透试验,比较鬼臼毒素在大鼠皮肤中的稳态透皮速率和皮肤滞留量,分别考察以醇质体、酊剂、脂质体、30%乙醇混悬液以及鬼臼毒素与空白醇质体物理混合物作为载体,鬼臼毒素经皮渗透特性。结果鬼臼毒素醇质体的12 h皮肤滞留量为8.17μg/cm2,高于其他各组;稳态透皮速率小于鬼臼毒素载药量为0.5%的脂质体组及乙醇混悬液组(P<0.05),与其他对照组无显著差异。结论醇质体具有较大的皮肤滞留量及较小的透皮速率。

Percutaneous permeation characteristic of podophyllotoxin ethosomes in vitro

Objective To study the percutaneous permeability characteristic of podophyllotoxin(POD) ethosomes in vitro.Methods Excised SD-rat abdomen skin was used as penetration barrier.The steady penetration rate and the skin residual amount were calculated to evaluate the percutaneous permeability of POD from ethosomes,tinctures,liposome,30% hydro-ethanolic suspension,mixture of drug and blank ethosomes,respectively.Results The skin residual amount of POD in the ethosomes group was 8.17 μg/cm2in 12 h,higher than those in the other groups.In addition,the steady penetration rate of POD in the ethosomes group decreased significantly compared with those in the liposome group with POD loading being 0.5%,and the hydro-ethanolic suspension group(P < 0.05),while no obvious difference was seen among the ethosomes group and the other groups.Conclusion Higher skin residual amount and lower steady penetration rate are observed in the ethosomes group.