几种鬼臼毒素制剂局部外用的动物实验研究

目的:观察鬼臼毒素脂质体皮肤外用时的释药方式和药物在皮肤中的滞留量。方法:以鬼臼毒素二棕榈酰磷脂酰胆碱（DPPC）脂质体和大豆卵磷脂脂质体进行动物试验,即以相同浓度的鬼臼毒素酊剂及2种鬼臼毒素脂质体悬液涂于幼猪的皮肤上,用激光共聚焦显微成像仪观察不同制剂的鬼臼毒素在皮肤中的滞留量。结果:DPPC脂质体所包裹的鬼臼毒素在表皮及真皮的浅层滞留量大,48小时内药物浓度一直明显高于鬼臼毒素酊剂及鬼臼毒素大豆卵磷脂脂质体。结论:DPPC脂质体包裹鬼臼毒素外用具有更好的皮肤靶向性,是较好的皮肤外用制剂。

Animal Experiment of Several Kinds of Podophyllotoxin Liposome for Topical Application on Skin

OBJECTIVE: To observe the release mode and the amount of retention in skin of podophyllotoxin liposomes in topical application. METHODS: Two kinds of podophyllotoxin liposome suspension (DPPC liposome and bean lecithin liposome) and podophyllotoxin tincture in same concentration were topically applied on the skin of porkets and the amounts of retention of drug in skin of different preparations were detected with confocal laser scanning microscope.RESULTS: The quantity of retention of podophyllotoxin DPPC liposome in epidermis and superficial layer of dermis was larger than those of other two preparations and the drug concentration in applying DPPC liposome kept higher for 48 hours.CONCLUSION:Podophyllotoxin liposome coated by DPPC is much more targetable to skin and is a fairly good topical preparation for applying on skin.