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  • Title: A Simple BODIPY-Based Viscosity Probe for Imaging of Cellular Viscosity in Live Cells.
    Author: Su D, Teoh CL, Gao N, Xu QH, Chang YT.
    Journal: Sensors (Basel); 2016 Aug 31; 16(9):. PubMed ID: 27589762.
    Abstract:
    Intracellular viscosity is a fundamental physical parameter that indicates the functioning of cells. In this work, we developed a simple boron-dipyrromethene (BODIPY)-based probe, BTV, for cellular mitochondria viscosity imaging by coupling a simple BODIPY rotor with a mitochondria-targeting unit. The BTV exhibited a significant fluorescence intensity enhancement of more than 100-fold as the solvent viscosity increased. Also, the probe showed a direct linear relationship between the fluorescence lifetime and the media viscosity, which makes it possible to trace the change of the medium viscosity. Furthermore, it was demonstrated that BTV could achieve practical applicability in the monitoring of mitochondrial viscosity changes in live cells through fluorescence lifetime imaging microscopy (FLIM).
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