Multi-target spectrally resolved fluorescence lifetime imaging microscopy

Nature Methods
Thomas NiehörsterMarkus Sauer

Abstract

We introduce a pattern-matching technique for efficient identification of fluorophore ratios in complex multidimensional fluorescence signals using reference fluorescence decay and spectral signature patterns of individual fluorescent probes. Alternating pulsed laser excitation at three different wavelengths and time-resolved detection on 32 spectrally separated detection channels ensures efficient excitation of fluorophores and a maximum gain of fluorescence information. Using spectrally resolved fluorescence lifetime imaging microscopy (sFLIM), we were able to visualize up to nine different target molecules simultaneously in mouse C2C12 cells. By exploiting the sensitivity of fluorescence emission spectra and the lifetime of organic fluorophores on environmental factors, we carried out fluorescence imaging of three different target molecules in human U2OS cells with the same fluorophore. Our results demonstrate that sFLIM can be used for super-resolution multi-target imaging by stimulated emission depletion (STED).

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Citations

Dec 29, 2016·The Journal of General Physiology·Diana PendinTullio Pozzan
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Jan 12, 2017·Biophysical Journal·Hermanus Johannes RuigrokYann Percherancier
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