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Responsive Metal Complex Probes for Time-Gated Luminescence Biosensing and Imaging.
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2020-06-23 , DOI: 10.1021/acs.accounts.0c00172
Run Zhang 1 , Jingli Yuan 2
Affiliation  

The development of reliable bioanalytical probes for selective and sensitive detection of particular analytes in biological systems is essential for better understanding the roles of the analytes in their native contexts. In the last two decades, luminescent metal complexes have greatly contributed to the development of such probes for biosensing and imaging due to their unique spectral and temporal properties, controllable cell membrane permeability, and cytotoxicity. Conjugating an analyte-activatable moiety to the metal complex luminophores allows the production of responsive metal complex probes for this analyte detection. Owing to their long-lifetime emissions, the responsive metal complex probes are accessible to the technique of time-gated luminescence (TGL) detection and imaging. With a delay time after pulsed excitation, the TGL technique allows for collection of only long-lived luminescence from responsive metal complex probes, while filtering out short-lived background autofluorescence, providing a background-free approach for the detection and imaging of the analyte at subcellular and/or molecular levels. Responsive metal complex probes, therefore, have emerged as complementary sensing and imaging tools of organic dye-based fluorescent probes for the in situ detection of analytes in complicated biological environments.

中文翻译:

响应金属复合探针,用于时控发光生物传感和成像。

为了更好地了解分析物在其天然环境中的作用,开发用于选择性和灵敏检测生物系统中特定分析物的可靠生物分析探针至关重要。在过去的二十年中,发光金属络合物由于其独特的光谱和时间特性,可控的细胞膜通透性和细胞毒性,为生物传感和成像探针的发展做出了巨大贡献。将分析物可激活的部分与金属络合物发光体缀合,可以生产用于该分析物检测的响应性金属络合物探针。由于它们的使用寿命长,因此响应金属络合物探针可用于时间门控发光(TGL)检测和成像技术。脉冲激励后有一个延迟时间,TGL技术仅允许从响应性金属络合物探针收集长寿命的发光,同时滤除短时的背景自发荧光,从而为在亚细胞和/或分子水平上对分析物进行检测和成像提供了无背景方法。因此,响应性金属复合物探针已成为有机染料基荧光探针的互补传感和成像工具,用于在复杂的生物环境中原位检测分析物。
更新日期:2020-07-21
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