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A Fluorescent Probe Based on Reversible Michael Addition–elimination Reaction for the Cycle Between Cysteine and H2O2

Abstract

Cysteine oxidation by H2O2, generating either cysteine sulfenic acid (CSOH) or disulfide (CSSC), is involved in redox homeostasis and signaling. Compared with quantification of cysteine content, monitoring the cysteine dynamics in real-time, in particular, takes on even greater importance. However, existing fluorescent probes suffer from low specificity or irreversible recognizing mechanisms. In the present work, we have successfully developed a reversible fluorescent probe for the cycle between cysteine and H2O2 based on the Michael addition–elimination reaction. This probe features specific and quantitative response to cysteine. The reversible detection was realized repeatedly with the addition of cysteine and H2O2 in order. We also demonstrated its usage for monitoring exogenous and endogenous cysteine in living cells. Eventually, this probe was capable of imaging cysteine dynamically in real-time.

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Supplementary files

Article information


Submitted
05 May 2020
Accepted
17 Jun 2020
First published
17 Jun 2020

Anal. Methods, 2020, Accepted Manuscript
Article type
Paper

A Fluorescent Probe Based on Reversible Michael Addition–elimination Reaction for the Cycle Between Cysteine and H2O2

F. Liu, S. Zang, J. Jing and X. Zhang, Anal. Methods, 2020, Accepted Manuscript , DOI: 10.1039/D0AY00904K

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