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Tagging Live Cells that Express Specific Peptidase Activity with Solid‐State Fluorescence
Author(s) -
Prost Maxime,
Canaple Laurence,
Samarut Jacques,
Hasserodt Jens
Publication year - 2014
Publication title -
chembiochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.05
H-Index - 126
eISSN - 1439-7633
pISSN - 1439-4227
DOI - 10.1002/cbic.201402091
Subject(s) - fluorophore , fluorescence , biophysics , flow cytometry , chemistry , molecular probe , live cell imaging , nanotechnology , materials science , biochemistry , cell , biology , microbiology and biotechnology , optics , dna , physics
A three‐component probe harnesses the extraordinary properties of a solid‐state fluorophore for the detection of living cells exhibiting a particular peptidase activity. The off–on mode by which the probe operates, the bright fluorescence of the resulting precipitate, and the rapid response allow an exceptional signal‐to‐background ratio during microscopic imaging. A tertiary carbamate link between the spacer and phenolic fluorophore is at the heart of the probe's long‐term stability. The degree of chlorination of the probe determines its response time and thus its suitability for live‐cell analysis. Our probe also allows highly resolved localization of peptidase activity during gel analysis or on agar. In comparison, probes releasing soluble fluorophores demonstrate complete diffusion of the fluorescent signal. These results demonstrate the probe's potential for diverse biomedical applications, including high‐fidelity flow cytometry and sensitive colony assays.