Discovery of novel quaternary ammonium compounds based on quinuclidine-3-ol as new potential antimicrobial candidates
作者:Linda Bazina、Ana Maravić、Lucija Krce、Barbara Soldo、Renata Odžak、Viljemka Bučević Popović、Ivica Aviani、Ines Primožič、Matilda Šprung
DOI:10.1016/j.ejmech.2018.12.023
日期:2019.2
ammonium compounds (QACs) are amphiphilic molecules displaying a broad-spectrum of antibacterial activity. QACs are commonly used antiseptics in industrial, home and hospital settings. Given the emergence of the QAC-resistant bacteria, there is an urgent need to design new QACs with good antimicrobial activity, able to escape the host resistance mechanism. Therefore, a series of QACs derived from quinuclidine-3-ol
季铵化合物(QAC)是两亲性分子,具有广谱的抗菌活性。QAC是工业,家庭和医院环境中常用的防腐剂。考虑到QAC耐药细菌的出现,迫切需要设计一种具有良好抗菌活性,能够逃脱宿主耐药机制的新型QAC。因此,设计并合成了一系列由奎尼丁-3-醇和长度可变的烷基链(QOH-C3至-C14)衍生的QAC。调查了新的单季QAC对17种新出现的食物腐败和致病微生物(包括临床耐多药ESKAPE分离株)的抗菌潜力。QOH-C14被证明具有最强的抗菌活性。它对所有测试的病原体都有很高的活性,90在0.12和3.9μg/ mL之间。QOH-C14的效力证实了烷基链是结构的重要组成部分,其长度在这些化合物的生物活性中起着至关重要的作用。原子力显微镜图像显示了用QOH-C14处理后细胞膜的破坏。通过流式细胞术和荧光显微镜进一步证实了这些结果。对健康人细胞的相对较低的毒性表明,QOH-C14具有作为新型QAC抗菌药物候选物的潜力。