KU Leuven, Department of Microbial and Molecular Systems, Faculty of Bioscience Engineering, Leuven, Belgium.
KU Leuven, Department of Microbial and Molecular Systems, Faculty of Bioscience Engineering, Leuven, Belgium
Microbiol Mol Biol Rev. 2020 Oct 28;84(4). doi: 10.1128/MMBR.00008-20. Print 2020 Nov 18.
The rise in fluorescence-based imaging techniques over the past 3 decades has improved the ability of researchers to scrutinize live cell biology at increased spatial and temporal resolution. In microbiology, these real-time vivisections structurally changed the view on the bacterial cell away from the "watery bag of enzymes" paradigm toward the perspective that these organisms are as complex as their eukaryotic counterparts. Capitalizing on the enormous potential of (time-lapse) fluorescence microscopy and the ever-extending pallet of corresponding probes, initial breakthroughs were made in unraveling the localization of proteins and monitoring real-time gene expression. However, later it became clear that the potential of this technique extends much further, paving the way for a focus-shift from observing single events within bacterial cells or populations to obtaining a more global picture at the intra- and intercellular level. In this review, we outline the current state of the art in fluorescence-based vivisection of bacteria and provide an overview of important case studies to exemplify how to use or combine different strategies to gain detailed information on the cell's physiology. The manuscript therefore consists of two separate (but interconnected) parts that can be read and consulted individually. The first part focuses on the fluorescent probe pallet and provides a perspective on modern methodologies for microscopy using these tools. The second section of the review takes the reader on a tour through the bacterial cell from cytoplasm to outer shell, describing strategies and methods to highlight architectural features and overall dynamics within cells.
在过去的 30 年中,基于荧光的成像技术的兴起提高了研究人员以更高的时空分辨率仔细研究活细胞生物学的能力。在微生物学中,这些实时活体解剖从“酶水溶液袋”的观点出发,彻底改变了人们对细菌细胞的看法,转而认为这些生物与真核生物一样复杂。利用(延时)荧光显微镜的巨大潜力和不断扩展的相应探针库,在揭示蛋白质定位和实时监测基因表达方面取得了最初的突破。然而,后来人们清楚地认识到,这项技术的潜力远不止于此,为将研究重点从观察单个细菌细胞或细菌群体中的事件转移到在细胞内和细胞间水平获得更全面的图景铺平了道路。在这篇综述中,我们概述了基于荧光的细菌活体解剖的最新技术,并提供了一些重要案例研究的概述,以说明如何使用或组合不同的策略来获取有关细胞生理学的详细信息。因此,本文由两部分组成(但相互关联),可以单独阅读和查阅。第一部分侧重于荧光探针库,并提供了使用这些工具进行显微镜检查的现代方法的视角。综述的第二部分将读者带入细菌细胞的内部,从细胞质到外壳,描述了突出细胞内结构特征和整体动态的策略和方法。