Selective Detection of Cu+ Ions in Live Cells via Fluorescence Lifetime Imaging Microscopy. Issue 43 (17th September 2021)

• Record Type: Journal Article
• Authors: Priessner, Martin; Summers, Peter A.; Lewis, Benjamin W.; Sastre, Magdalena; Ying, Liming; Kuimova, Marina K.; Vilar, Ramon
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 43(2021)
• Page Start: 23148
• Page End: 23153
• Publication Date: 2021-09-17
• Subjects: copper(I) -- FLIM . -- fluorescence -- lifetime -- TCSPC; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202109349
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Copper is an essential trace element in living organisms with its levels and localisation being carefully managed by the cellular machinery. However, if misregulated, deficiency or excess of copper ions can lead to several diseases. Therefore, it is important to have reliable methods to detect, monitor and visualise this metal in cells. Herein we report a new optical probe based on BODIPY, which shows a switch‐on in its fluorescence intensity upon binding to copper(I), but not in the presence of high concentration of other physiologically relevant metal ions. More interestingly, binding to copper(I) leads to significant changes in the fluorescence lifetime of the new probe, which can be used to visualize copper(I) pools in lysosomes of live cells via fluorescence lifetime imaging microscopy (FLIM). Abstract : Herein we report a new fluorescent probe that upon binding to copper(I) (but not any other physiologically relevant metal ions), displays an intensity switch‐on as well as a significant change in its fluorescence lifetime. The latter has allowed us to visualize copper(I) in live cells via fluorescence lifetime imaging microscopy.