Rational structural modification of the isatin scaffold to develop new and potent antimicrobial agents targeting bacterial peptidoglycan glycosyltransferase
Rational structural modification of the isatin scaffold to develop new and potent antimicrobial agents targeting bacterial peptidoglycan glycosyltransferase
Isatin-based small molecules targeting bacterial peptidoglycan glycosyltransferase are potent antimicrobial agents against S. aureus, E. coli and methicillin-resistant Staphylococcus aureus strains.
activity againstmethicillin-resistant strains of S. aureus MRSA-1 and MRSA-2 (MIC = 3.5 and 7.0 µM, respectively) and high solubilization capacity toward hydrophobic dye (Sudan I). Moreover, it forms hydrogen-bonds with drugs (niclosamide and piperine) and displays a good selectivity index toward fungi Candida albicans ATCC 10231. Such new nontoxic Dabco-Is-n biocides with antibacterial and antifungal
这项工作涉及在天然靛红支架上创建新的多功能季铵化合物 (QAC) 作为新一代抗菌剂。合成了包含具有不同疏水性(R = C n H 2n+1,其中 n = 10、12、14、16、18)的季铵化 DABCO 部分(Dabco-Is-n)的 1-R-isatin-3-酰基腙。这个想法是在自组装季铵化合物的结构中结合两个杀菌片段,可能具有不同的作用机制。自组装行为、对疏水性染料苏丹 I 的溶解特性、对革兰氏阳性和革兰氏阴性细菌、真菌、溶血活性、细胞毒性 (MTT 测试) 和体外的抗菌活性研究了抗凝血和抗聚集活性。通过张力测量法、电导法、动态光散射法和紫外分光光度法确定,Dabco-Is-n 临界胶束浓度值比 Dabco-n 表面活性剂低 10 倍。也就是说,Dabco-Is-n 自组装是抗菌活性表现的负责因素。Dabco-Is-12 被发现在很大程度上具有血液生物相容性,具有低毒性和低溶血性(IC