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Anal Chem. 2017 Jul 18;89(14):7795-7801. doi: 10.1021/acs.analchem.7b01934. Epub 2017 Jul 3.

Defining Cancer Cell Bioenergetic Profiles Using a Dual Organelle-Oriented Chemosensor Responsive to pH Values and Electropotential Changes.

Author information

1
Department of Chemical Biology, College of Chemistry and Chemical Engineering, State Key Laboratory for Physical Chemistry of Solid Surfaces, the Key Laboratory for Chemical Biology of Fujian Province, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Innovation Center for Cell Signaling Network, Xiamen University , Xiamen, 361005, China.
2
State key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University , Xiamen, 361005, China.

Abstract

Cell fate is largely shaped by combined activity of different types of organelles, which often feature functionally critical parameters that succumb to pathological inducers. We herein report the analysis of cell bioenergetic profiles with a dual organelle-oriented chemosensor (RC-AMI), partitioning in mitochondria to give blue fluorescence and in lysosomes to give red fluorescence. Responsive to lysosomal pH and mitochondrial transmembrane potential (ΔΨm), two parameters crucial to cell bioenergetics, RC-AMI enables dual colored reporting of lysosomal acidity and ΔΨm, revealing upregulated ΔΨm and imbalance dramatically shifted favoring ΔΨm over lysosomal acidity in cancer cells whereas the tendency is reversed in starved cells. Complementing classical homo-organelle-specific sensors, this dual organelle-oriented and fluorescently responsive probe offers a new tool to detect imbalance between lysosomal acidity and mitochondrial ΔΨm, an index critical for cancer bioenergetics.

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