Technical insights into fluorescence lifetime microscopy of mechanosensitive Flipper probes
Roffay, C.; Garcia Arcos, J. M.; Chapuis, P.; Lopez-Andarias, J.; Colom, A.; Tomba, C.; Di Meglio, I.; Matile, S.; Roux, A.; Mercier, V.
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Measuring forces within living cells remains a technical challenge. We developed hydrophobic mechanosensing fluorescent probes called Flippers, whose fluorescence lifetime depends on lipid packing and can report on membrane tension. Here, we describe technical optimization of the probe imaging, and diverse characterizations in various biological and in vitro systems. We provide a guideline to measure biophysical parameters of cellular membranes by FLIM microscopy with Flipper probes, providing evidences that flippers can report long range forces in cells, tissues and organsi.
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