Visualization and In Situ Ablation of Intracellular Bacterial Pathogens through Metabolic Labeling
作者:Fang Hu、Guobin Qi、Kenry、Duo Mao、Shiwei Zhou、Min Wu、Wenbo Wu、Bin Liu
DOI:10.1002/anie.201910187
日期:2020.6.8
‐Ala are inhibited, leading to an enhanced fluorescent signal, which allows the clear visualization of the intracellular bacteria. Moreover, TPEPy‐d ‐Ala can effectively ablate the labeled intracellular bacteria in situ owing to covalent ligation to peptidoglycan, yielding a low intracellular minimum inhibitory concentration (MIC) of 20±0.5 μg mL−1, much more efficient than that of a commonly used
在宿主细胞的保护下,隐藏的细胞内细菌通常很难用普通抗生素杀死,并且如果不进行复杂的细胞预处理就无法显现出来。在此,我们成功开发了一种可细菌代谢的双功能探针TPEPy- d -Ala ,它基于d-丙氨酸和具有聚集诱导发射的光敏剂,用于活宿主细胞中细胞内细菌的荧光开启成像和光动力消融原地。一旦新陈代谢结合到细菌肽聚糖中,TPEPy- d- Ala的分子内运动就会被抑制,导致荧光信号增强,从而使细胞内细菌清晰可见。此外,TPEPy- d‐Ala由于与肽聚糖共价连接,因此可以有效地原位去除标记的细胞内细菌,从而产生20±0.5μgmL -1的低细胞内最低抑菌浓度(MIC),比常用抗生素万古霉素有效得多。