Issue 47, 2019

Endoplasmic reticulum targeting fluorescent probes to image mobile Zn2+

Abstract

Zn2+ plays an important role in the normal function of the endoplasmic reticulum (ER) and its deficiency can cause ER stress, which is related to a wide range of diseases. In order to provide tools to better understand the role of mobile Zn2+ in ER processes, the first custom designed ER-localised fluorescent Zn2+ probes have been developed through the introduction of a cyclohexyl sulfonylurea as an ER-targeting unit with different Zn2+ receptors. Experiments in vitro and in cellulo show that both probes have a good fluorescence switch on response to Zn2+, high selectivity over other cations, low toxicity, ER-specific targeting ability and are efficacious imaging agents for mobile Zn2+ in four different cell lines. Probe 9 has been used to detect mobile Zn2+ changes under ER stress induced by both tunicamycin or thapsigargin, which indicates that the new probes should allow a better understanding of the mechanisms cells use to respond to dysfunction of zinc homeostasis in the ER and its role in the initiation and progression of diseases to be developed.

Graphical abstract: Endoplasmic reticulum targeting fluorescent probes to image mobile Zn2+

Supplementary files

Article information

Article type
Edge Article
Submitted
26 Aug. 2019
Accepted
16 Okt. 2019
First published
16 Okt. 2019
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2019,10, 10881-10887

Endoplasmic reticulum targeting fluorescent probes to image mobile Zn2+

L. Fang, G. Trigiante, R. Crespo-Otero, C. S. Hawes, M. P. Philpott, C. R. Jones and M. Watkinson, Chem. Sci., 2019, 10, 10881 DOI: 10.1039/C9SC04300D

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