Investigation of Iminosulfuranes as Novel Transdermal Penetration Enhancers: Enhancement Activity and Cytotoxicity
作者:Yifan Song、Chunhong Xiao、Richard Mendelsohn、Tao Zheng、Lucjan Strekowski、Bozena Michniak
DOI:10.1007/s11095-005-7416-4
日期:2005.11
Very few chemical enhancers for transdermal drug delivery have been approved for clinical use due to irritancy and toxicity concerns. Novel chemical enhancers (iminosulfuranes) were synthesized and studied for their activity and toxicity. Skin was treated with 0.4 M 1–5 for 1 h before hydrocortisone was applied. Samples were taken over 24 h and analyzed by high-performance liquid chromatography. Dermal fibroblasts and epidermal keratinocytes were treated with 0–1.2 M 1–5 for 24 h and cytotoxicity assay [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT)] was performed. Furthermore, enhancement activity of 0–0.4 M 2 was studied. Partition coefficient of the model drugs into stratum corneum (SC) was measured and confocal Raman microscopy was used to study the penetration process and possible mechanisms of action of the enhancers. Quantitative structure–activity relationship (QSAR) was analyzed to study the contribution of different intramolecular descriptors to enhancement activity. Iminosulfurane 2 showed the highest enhancement activity. All compounds below 0.2 M were safe to skin cells, and 2 was effective at the concentration of 0.1 and 0.2 M. Mechanisms of action of 2 may include increasing partition coefficient of the model drug into SC and interaction between the enhancer and lipids and protein in the SC. QSAR study indicated contribution of several factors to activity: partition coefficient, hydrogen-bond acceptor, and optimal molecular size. Enhancement activity of 2 was achieved without any cytotoxicity.
由于刺激性和毒性问题,很少有用于透皮给药的化学增强剂被批准用于临床。合成了新型化学增强剂(亚氨基硫醚)并研究了其活性和毒性。在使用氢化可的松之前,用 0.4 M 1–5 处理皮肤 1 小时。 24 小时内采集样品并通过高效液相色谱进行分析。真皮成纤维细胞和表皮角质形成细胞用 0–1.2 M 1–5 处理 24 小时,并进行细胞毒性测定 [3-(4,5-二甲基噻唑-2-基)-2,5-二苯基溴化四唑 (MTT)]。此外,还研究了 0–0.4 M 2 的增强活性。测量模型药物在角质层(SC)中的分配系数,并使用共焦拉曼显微镜研究增强剂的渗透过程和可能的作用机制。分析定量结构-活性关系(QSAR)以研究不同分子内描述符对增强活性的贡献。亚氨基硫醚2表现出最高的增强活性。所有低于 0.2 M 的化合物对皮肤细胞都是安全的,2 在 0.1 和 0.2 M 浓度下有效。2 的作用机制可能包括增加模型药物在 SC 中的分配系数以及增强剂与 SC 中脂质和蛋白质之间的相互作用。 SC。 QSAR 研究表明几个因素对活性的贡献:分配系数、氢键受体和最佳分子大小。实现了2的增强活性,且没有任何细胞毒性。