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Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
Published on: February 9, 2012
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Fluorescence lifetime estimation: A practical approach using Flipper-TR FLIM
Tithi Mandal1, Aurélien Roux1, Juan Manuel García-Arcos2
1Department of Biochemistry, University of Geneva, Geneva, Switzerland.
Methods in Enzymology
|March 1, 2026
Summary
This study benchmarks methods for analyzing Flipper-TR membrane dye lifetime using fluorescence lifetime imaging microscopy (FLIM). It provides a framework for choosing the best lifetime estimation strategy for live-cell membrane tension studies.
Area of Science:
- Cell Biology
- Biophysics
- Microscopy
Background:
- Flipper-TR is a vital membrane dye for measuring live-cell membrane tension using fluorescence lifetime imaging microscopy (FLIM).
- Optimal data analysis strategies for Flipper-TR lifetime extraction remain undefined, hindering quantitative FLIM applications.
Purpose of the Study:
- To systematically compare and benchmark various methods for estimating Flipper-TR fluorescence lifetime.
- To establish a decision-making framework for selecting optimal FLIM analysis strategies for Flipper dyes across diverse experimental conditions.
Main Methods:
- Systematic comparison of Flipper-TR lifetime estimation techniques: multi-exponential reconvolution fitting, tail fitting, mean photon arrival time (first moment), and phasor analysis.
- Evaluation of estimators under varying photon budgets, sample properties, microscope models, and laser frequencies.
- Quantitative fluorescence lifetime imaging microscopy (FLIM) data acquisition and analysis.
Main Results:
- Performance of different lifetime estimators varied significantly based on photon budget and experimental parameters.
- Phasor analysis and mean photon arrival time showed robustness across tested conditions.
- No single method universally outperformed others, highlighting the need for context-specific selection.
Conclusions:
- A comprehensive benchmark for Flipper-TR lifetime analysis in FLIM is provided.
- Guidance is offered for selecting appropriate quantitative FLIM analysis strategies based on experimental context.
- Standardized analysis protocols are crucial for reproducible Flipper dye-based membrane tension measurements.
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