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research article

Gentle Rhodamines for Live-Cell Fluorescence Microscopy

Liu, Tianyan
•
Kompa, Julian
•
Ling, Jing
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2024
ACS Central Science

Rhodamines have been continuously optimized in brightness, biocompatibility, and color to fulfill the demands of modern bioimaging. However, the problem of phototoxicity caused by the excited fluorophore under long-term illumination has been largely neglected, hampering their use in time-lapse imaging. Here we introduce cyclooctatetraene (COT) conjugated rhodamines that span the visible spectrum and exhibit significantly reduced phototoxicity. We identified a general strategy for the generation of Gentle Rhodamines, which preserved their outstanding spectroscopic properties and cell permeability while showing an efficient reduction of singlet-oxygen formation and diminished cellular photodamage. Paradoxically, their photobleaching kinetics do not go hand in hand with reduced phototoxicity. By combining COT-conjugated spirocyclization motifs with targeting moieties, these Gentle Rhodamines compose a toolkit for time-lapse imaging of mitochondria, DNA, and actin, and synergize with covalent and exchangeable HaloTag labeling of cellular proteins with less photodamage than their commonly used precursors. Taken together, the Gentle Rhodamines generally offer alleviated phototoxicity and allow advanced video recording applications, including voltage imaging.

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Type
research article
DOI
10.1021/acscentsci.4c00616
Scopus ID

2-s2.0-85205722521

Author(s)
Liu, Tianyan

Peking University

Kompa, Julian

Max Planck Institute for Medical Research

Ling, Jing

Peking University

Lardon, Nicolas

Max Planck Institute for Medical Research

Zhang, Yuan

Peking University

Chen, Jingting

Peking University

Reymond, Luc  

École Polytechnique Fédérale de Lausanne

Chen, Peng

PKU-Nanjing Institute of Translational Medicine

Tran, Mai

Max Planck Institute for Medical Research

Yang, Zhongtian

Peking University

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Date Issued

2024

Published in
ACS Central Science
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
PTCB  
FunderFunding(s)Grant NumberGrant URL

National Key R&D Program of China

2021YFF0502904

Beijing Municipal Science & Technology Commission

Z221100003422013

Available on Infoscience
January 25, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/244005
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