几种常用中药促渗剂对蒿甲醚体外透皮性能的影响

目的:考察蒿甲醚的体外透皮性能及几种常用中药促渗剂对蒿甲醚体外透皮性能的影响,为蒿甲醚经皮给药系统的开发奠定基础。方法:采用TK-12A型透皮扩散仪,给药室加入几种含不同浓度的常用促渗剂的蒿甲醚样品,用离体大鼠皮肤进行体外透皮实验;以HPLC测定一定时间点接收池中的药物浓度,求算累积透过量、稳态透皮速率及24 h药物在皮肤中的滞留量。结果:蒿甲醚的稳态渗透速率Js:(2.78±0.78)μg.cm^-2.h^-1,24 h累积透过量Qr:(69.07±3.01)μg.cm^-2,24 h皮肤滞留量Q s:(58.93±3.56)μg.cm^-2;几种不同浓度的促渗剂均能不同程度地提高蒿甲醚的稳态渗透速率、累积透过量和皮肤滞留量,且皮肤滞留量与累积透过量之间存在线性相关性。结论:蒿甲醚是一种理想的经皮给药候选药物,几种常用的促渗剂均能不同程度促进蒿甲醚的渗透,蒿甲醚有望开发成经皮给药制剂。

Effect of several penetration enharcers on transdermal permeation and skin accumulation of artemether

OBJECTIVE: To investigate penetration characteristics of artemether and the effect of different permeation enhancer on transdermal permeation of artemether through rat skin. METHOD: The permeation experiments were performed using rat skin on modified Franz diffusion cells in vitro. The concentrations of artemether in receptor compartment at specified time points were determined by HPLC. RESULT: The permeating ratio through human skin of artemether solution was Js (2.78 +/- 0.78) microg x cm(-2) x h(-1), the quantity of drug penetrated through and accumulated in the skin by the end of the experiment were (69.07 +/- 3.01) microg x cm(-2), (58.93 +/- 3.56) microg x cm(-2) respectively. Four different permeation enhancers can improve the transdermal permeation of artemether. CONCLUSION: Artemether have the potential to be developed to new transdermal preparation.