Phenylalanine and Tryptophan-Based Surfactants as New Antibacterial Agents: Characterization, Self-Aggregation Properties, and DPPC/Surfactants Vesicles Formulation
作者:Zakaria Hafidi、Lourdes Pérez、Mohammed El Achouri、Ramon Pons
DOI:10.3390/pharmaceutics15071856
日期:——
C12TC3NH3Cl/DPPC formulations (40%/60% and 20%/80% molar ratios) exhibited good antibacterial activity, while the others were not effective against the tested bacteria. The strong affinity between DPPC and surfactant molecules, as determined by the DFT (densityfunctionaltheory) method, could be one of the reasons for the loss of antibacterial activity of these cationic surfactants when they are incorporated in
以可再生原料为起始化合物,采用绿色合成工艺合成了基于苯丙氨酸(CnPC3NH3Cl)和色氨酸(CnTC3NH3Cl)的阳离子表面活性剂。研究了其合成、酸碱平衡、聚集特性和抗菌活性。使用电导率和荧光来建立临界胶束浓度。CnPC3NH3Cl 和 CnTC3NH3Cl 的胶束化分别发生在 0.42–16.2 mM 和 0.29–4.6 mM 范围内。由于这些表面活性剂具有一定的酸性特征,因此通过滴定测定表观pKa,观察到酸度随着链长度的增加而增加,并且苯丙氨酸的酸性比色氨酸衍生物的酸性稍高。这两个家族都对八种不同的细菌菌株表现出有希望的抗菌功效。针对肽聚糖糖基转移酶(PDB ID:2OQO)的分子对接研究用于研究目标表面活性剂分子的潜在结合机制。根据小角 X 射线散射 (SAXS) 结果,表面活性剂融入 DPPC(二棕榈酰磷脂酰胆碱)双层中,在高表面活性剂浓度下没有强烈扰动。一些C12TC3NH