Polyamines with varying chain-lengths were evaluated for antimicrobial activity in order to test the hypothesis that these bis-cationic amphipathic compounds may also bind to and permeabilize intact Gram negative bacterial membranes. The compounds were found to possess significant antimicrobial activity and mediated via permeabilization of bacterial membranes. Homologated spermine, bis-acylated with C
8
or C
9
chains was found to profoundly sensitize
E. coli
to hydrophobic antibiotics such as rifampicin.
多种链长的
多胺被评估其抗微
生物活性,以验证这些双阳离子两性化合物可能也结合并使革兰氏阴性细菌膜通透的假设。发现这些化合物具有显著的抗微
生物活性,并通过细菌膜通透介导。经过烷基化的
精胺,与C8或C9链双酰化,被发现能显著增加大肠杆菌对亲脂性抗生素如
利福平的敏感性。