Mitochondrial Na+/Ca2+ exchange assays

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2 Scopus citations

Abstract

Here, we describe two complementary assays designed to analyze mitochondrial Na+/Ca2+ exchange activity. In both procedures, the counter ion transport of sodium and calcium ions across the inner membrane of mitochondria is assayed in permeabilized cells preloaded with a mitochondria-selective Na+ probe, CoroNa-Red, or with a mitochondria-targeted calcium sensor, ratiometric-pericam, respectively. These methods, therefore, do not require a mitochondrial preisolation step, with the native cellular mitochondrial architecture being maintained. Importantly, these methods equilibrate the cytosol with the extracellular milieu to allow control over the extra-mitochondrial ionic environment, while eliminating any possible interference by plasma membrane transporters.

Original languageEnglish
Pages (from-to)202-206
Number of pages5
JournalCold Spring Harbor Protocols
Volume2014
Issue number2
DOIs
StatePublished - 1 Feb 2014

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology (all)

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