Highly Fluorescent and Photostable Probe for Long-Term Bacterial Viability Assay Based on Aggregation-Induced Emission

Long‐term tracking of bacterial viability is of great importance for monitoring the viability change of bacteria under storage, evaluating disinfection efficiency, as well as for studying the pharmacokinetic and pharmacodynamic properties of antibacterials. Most of the conventional viability dyes, h...

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Veröffentlicht in:Advanced healthcare materials 2014-01, Vol.3 (1), p.88-96
Hauptverfasser: Zhao, Engui, Hong, Yuning, Chen, Sijie, Leung, Chris W. T., Chan, Carrie Y. K., Kwok, Ryan T. K., Lam, Jacky W. Y., Tang, Ben Zhong
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container_end_page 96
container_issue 1
container_start_page 88
container_title Advanced healthcare materials
container_volume 3
creator Zhao, Engui
Hong, Yuning
Chen, Sijie
Leung, Chris W. T.
Chan, Carrie Y. K.
Kwok, Ryan T. K.
Lam, Jacky W. Y.
Tang, Ben Zhong
description Long‐term tracking of bacterial viability is of great importance for monitoring the viability change of bacteria under storage, evaluating disinfection efficiency, as well as for studying the pharmacokinetic and pharmacodynamic properties of antibacterials. Most of the conventional viability dyes, however, suffer from high toxicity and/or poor photostability, making them unsuitable for long‐term studies. In this work, an aggregation‐induced emission molecule, TPE‐2BA, which can differentiate dead and living bacteria and serve as a highly fluorescent and photostable probe for long‐term viability assay. TPE‐2BA is a cell‐impermeable DNA stain that binds to the groove of double‐stranded DNA. Bacteria with compromised membrane open the access for TPE‐2BA to reach DNA, endowing it with strong emission. The feasibility of using TPE‐2BA for screening effective bactericides is also demonstrated. Plate count experiment reveals that TPE‐2BA poses negligible toxicity to bacteria, indicating that it is an excellent probe for long‐term bacterial viability assay. Bacteria with compromised membranes open the access for TPE‐2BA, a fluorophore with aggregation‐induced emission characteristics, to approach their DNA. Such interaction selectively lights up dead bacteria. Possessing high brightness, excellent photostability, and appreciable biocompatibility, TPE‐2BA represents a well‐suited candidate for long‐term tracking of bacterial viability and for bactericide screening.
doi_str_mv 10.1002/adhm.201200475
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Most of the conventional viability dyes, however, suffer from high toxicity and/or poor photostability, making them unsuitable for long‐term studies. In this work, an aggregation‐induced emission molecule, TPE‐2BA, which can differentiate dead and living bacteria and serve as a highly fluorescent and photostable probe for long‐term viability assay. TPE‐2BA is a cell‐impermeable DNA stain that binds to the groove of double‐stranded DNA. Bacteria with compromised membrane open the access for TPE‐2BA to reach DNA, endowing it with strong emission. The feasibility of using TPE‐2BA for screening effective bactericides is also demonstrated. Plate count experiment reveals that TPE‐2BA poses negligible toxicity to bacteria, indicating that it is an excellent probe for long‐term bacterial viability assay. Bacteria with compromised membranes open the access for TPE‐2BA, a fluorophore with aggregation‐induced emission characteristics, to approach their DNA. Such interaction selectively lights up dead bacteria. Possessing high brightness, excellent photostability, and appreciable biocompatibility, TPE‐2BA represents a well‐suited candidate for long‐term tracking of bacterial viability and for bactericide screening.</abstract><cop>Weinheim</cop><pub>WILEY-VCH Verlag</pub><pmid>23814037</pmid><doi>10.1002/adhm.201200475</doi><tpages>9</tpages></addata></record>
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subjects aggregation-induced emission
Assaying
Bacteria
bacterial viability assay
Bacteriological methods and techniques used in bacteriology
Bacteriology
Biocompatibility
Biological and medical sciences
Deoxyribonucleic acid
DNA
DNA, Bacterial - chemistry
DNA, Bacterial - metabolism
Emission
Escherichia coli - cytology
Escherichia coli - drug effects
Escherichia coli - genetics
fluorescence imaging
Fluorescent Dyes - chemistry
Fluorescent Dyes - metabolism
Fluorescent Dyes - pharmacology
Fundamental and applied biological sciences. Psychology
Light
Microbial Viability
Microbiology
Microscopy, Fluorescence
tetraphenylethene
Toxicity
Tracking
Ultraviolet Rays
Viability
title Highly Fluorescent and Photostable Probe for Long-Term Bacterial Viability Assay Based on Aggregation-Induced Emission
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