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- W2099956256 abstract "Mitochondrial membrane potential (Deltapsi) is key to mitochondrial function and cellular survival. Here, we aimed to develop an automated protocol allowing sensitive quantification of Deltapsi in living cells at the level of individual mitochondria. Human skin fibroblasts were stained with the fluorescent cation tetramethyl rhodamine methyl ester (TMRM), which is sequestered by mitochondria according to their Deltapsi. Cells were visualized by videomicroscopy and the acquired images were processed to generate a mitochondria-specific mask. The latter was superimposed on the original image to allow quantification of TMRM fluorescence. Following validation, our approach revealed that mitochondria with different Deltapsi coexisted within the same cell. Furthermore, our method allowed reproducible detection of small (<10%) reductions in TMRM intensity induced by the complex III inhibitor antimycin A. Mitochondrial uncoupling by p-trifluoromethoxy carbonyl cyanide phenyl hydrazone (FCCP) greatly reduced mitochondrial TMRM fluorescence. Under these conditions faithful mask calculation and TMRM intensity analysis were still possible using a mitochondria-targeted green fluorescence protein (mitoAcGFP1), expressed in the cells using baculoviral transfection." @default.
- W2099956256 created "2016-06-24" @default.
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- W2099956256 date "2008-01-01" @default.
- W2099956256 modified "2023-09-27" @default.
- W2099956256 title "Life cell quantification of mitochondrial membrane potential at the single organelle level" @default.
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- W2099956256 doi "https://doi.org/10.1002/cyto.a.20503" @default.
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