Issue 26, 2021

Three asymmetric BODIPY derivatives as fluorescent probes for highly selective and sensitive detection of cysteine in living cells

Abstract

Biothiols are widely involved in various important physiological activities and play a significant role in maintaining redox homeostasis in living organisms. Herein, we designed and synthesized three new asymmetric fluorescent probes (BDP-S-Ph, BDP-S-ENE and BDP-S-R) to discriminate Cys from Hcy/GSH. These probes reacted with Cys to form meso-amino-BODIPYs via SNAr substitution–rearrangement, thereby inducing a fluorescence turn-on effect. Moreover, they could selectively and sensitively detect Cys in solution with low detection limits (50 nM, 28 nM and 87 nM, respectively). Through comparing the response rates of the three probes to Cys, we concluded that the increase of conformational restrictions led to a decrease in probe reactivity. Besides, the sensing mechanism was demonstrated by mass spectrometry. Furthermore, cell experiments indicated that the probes were able to image exogenous and endogenous Cys through green or red channels in living cells.

Graphical abstract: Three asymmetric BODIPY derivatives as fluorescent probes for highly selective and sensitive detection of cysteine in living cells

Supplementary files

Article information

Article type
Paper
Submitted
30 Apr. 2021
Accepted
05 Jūn. 2021
First published
07 Jūn. 2021

Anal. Methods, 2021,13, 2908-2914

Three asymmetric BODIPY derivatives as fluorescent probes for highly selective and sensitive detection of cysteine in living cells

J. Yue, N. Wang, J. Wang, Y. Tao, H. Wang, J. Liu, J. Zhang, J. Jiao and W. Zhao, Anal. Methods, 2021, 13, 2908 DOI: 10.1039/D1AY00740H

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