用于超分辨率成像的光稳定和光开关荧光染料。

Photostable and photoswitching fluorescent dyes for super-resolution imaging.

作者信息

Minoshima Masafumi, Kikuchi Kazuya

机构信息

Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan.

Immunology Frontier Research Center (IFReC), Osaka University, Suita, Osaka, 565-0871, Japan.

出版信息

J Biol Inorg Chem. 2017 Jul;22(5):639-652. doi: 10.1007/s00775-016-1435-y. Epub 2017 Jan 12.

Abstract

Super-resolution fluorescence microscopy is a recently developed imaging tool for biological researches. Several methods have been developed for detection of fluorescence signals from molecules in a subdiffraction-limited area, breaking the diffraction limit of the conventional optical microscopies and allowing visualization of detailed macromolecular structures in cells. As objectives are exposed to intense laser in the optical systems, fluorophores for super-resolution microscopy must be tolerated even under severe light irradiation conditions. The fluorophores must also be photoactivatable and photoswitchable for single-molecule localization-based super-resolution microscopy, because the number of active fluorophores must be controlled by light irradiation. This has led to growing interest in these properties in the development of fluorophores. In this mini-review, we focus on the development of photostable and photoswitching fluorescent dyes for super-resolution microscopy. We introduce recent efforts, including improvement of fluorophore photostability and control of photoswitching behaviors of fluorophores based on photochemical and photophysical processes. Understanding and manipulation of chemical reactions in excited fluorophores can develop highly photostable and efficiently photoswitchable fluorophores that are suitable for super-resolution imaging applications.

摘要

超分辨率荧光显微镜是一种最近开发的用于生物学研究的成像工具。已经开发了几种方法来检测亚衍射极限区域内分子的荧光信号,突破了传统光学显微镜的衍射极限,能够可视化细胞中详细的大分子结构。由于在光学系统中物镜会受到强激光照射,因此即使在严苛的光照条件下,超分辨率显微镜用的荧光团也必须能够耐受。对于基于单分子定位的超分辨率显微镜而言,荧光团还必须是可光激活和可光切换的,因为活性荧光团的数量必须通过光照来控制。这使得人们在荧光团开发中对这些特性的兴趣日益浓厚。在这篇迷你综述中,我们重点关注用于超分辨率显微镜的光稳定且可光切换荧光染料的开发。我们介绍了近期的研究成果,包括基于光化学和光物理过程对荧光团光稳定性的改进以及对荧光团光切换行为的控制。对激发态荧光团中化学反应的理解和操控能够开发出适用于超分辨率成像应用的高光稳定性且高效可光切换的荧光团。

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