Lipo-γ-AApeptides as a New Class of Potent and Broad-Spectrum Antimicrobial Agents
作者:Youhong Niu、Shruti Padhee、Haifan Wu、Ge Bai、Qiao Qiao、Yaogang Hu、Lacey Harrington、Whittney N. Burda、Lindsey N. Shaw、Chuanhai Cao、Jianfeng Cai
DOI:10.1021/jm300274p
日期:2012.4.26
antibiotic agents, as they have the potential to circumvent emerging drug resistance against conventional antibiotic treatments. Non-natural antimicrobial peptidomimetics are an ideal example of this, as they have significant potency and in vivo stability. Here we report for the first time the design of lipidated γ-AApeptides as antimicrobial agents. These lipo-γ-AApeptides show potent broad-spectrum activities
对开发抗菌肽(AMPs)作为下一代抗生素的需求日益增长,因为它们具有规避新兴的对常规抗生素治疗的耐药性的潜力。非天然抗菌肽模拟物是一个理想的例子,因为它们具有显着的效力和体内稳定性。在这里,我们首次报道了脂化的γ-AA肽作为抗菌剂的设计。这些脂质-γ-AA肽对真菌和一系列革兰氏阳性和革兰氏阴性细菌(包括对大多数抗生素具有抗药性的临床相关病原体)显示出有效的广谱活性。我们使用膜去极化和荧光显微镜分析了它们的结构-功能关系和抗菌机制。引入不饱和脂质链显着降低了溶血活性,从而提高了选择性。此外,代表性的lipo-γ-AA肽不会在小鼠体内诱导耐药性金黄色葡萄球菌,即使经过17轮传代。这些结果表明,脂质-γ-AA肽具有类似于AMP的杀菌机制,并且具有作为新型新型抗生素治疗剂的强大潜力。