Human Skin Permeation of Branched-Chain 3-O-Alkyl Ester and Carbonate Prodrugs of Naltrexone
作者:Haranath K. Vaddi、Mohamed O. Hamad、Jianhong Chen、Stan L. Banks、Peter A. Crooks、Audra L. Stinchcomb
DOI:10.1007/s11095-005-2592-9
日期:2005.5
PURPOSE: Physicochemical characterization and in vitro human skin diffusion studies of branched-chain ester and carbonate prodrugs of naltrexone (NTX) were compared and contrasted with straight-chain ester and carbonate NTX prodrugs. METHODS: Human skin permeation rates, thermal parameters, solubilities in mineral oil and buffer, and stabilities in buffer and plasma were determined. Partition coefficients
目的:比较纳曲酮(NTX)的支链酯和碳酸酯前药的理化特性和体外人体皮肤扩散研究,并将其与直链酯和碳酸酯NTX前药进行对比。方法:测定人体皮肤的渗透率,热参数,在矿物油和缓冲液中的溶解度以及在缓冲液和血浆中的稳定性。确定具有相同碳原子数的直链和支链酯的角质层和媒介物之间的分配系数。结果:与NTX相比,支链前药的熔点更低,缓冲液的溶解度更高,矿物油的溶解度更高。来自所有这些支化前药的透皮通量值显着低于来自直链酯和碳酸甲酯前药的通量值。直链前药比其支链对应物具有更高的分配系数值和更高的计算热力学活性。对于具有增加分支的前药,前药在缓冲液和血浆中水解为NTX的速度较慢。结论:具有大部分的支链前药具有比直链前药小的角质层-车辆分配系数和较低的热力学活性,从而导致较小的透皮通量值。