Literature DB >> 24457333

Comprehensive measurement of respiratory activity in permeabilized cells using extracellular flux analysis.

Joshua K Salabei1, Andrew A Gibb2, Bradford G Hill3.   

Abstract

Extracellular flux (XF) analysis has become a mainstream method for measuring mitochondrial function in cells and tissues. Although this technique is commonly used to measure bioenergetics in intact cells, we outline here a detailed XF protocol for measuring respiration in permeabilized cells. Cells are permeabilized using saponin (SAP), digitonin (DIG) or recombinant perfringolysin O (rPFO) (XF-plasma membrane permeabilizer (PMP) reagent), and they are provided with specific substrates to measure complex I- or complex II-mediated respiratory activity, complex III+IV respiratory activity or complex IV activity. Medium- and long-chain acylcarnitines or glutamine may also be provided for measuring fatty acid (FA) oxidation or glutamine oxidation, respectively. This protocol uses a minimal number of cells compared with other protocols and does not require isolation of mitochondria. The results are highly reproducible, and mitochondria remain well coupled. Collectively, this protocol provides comprehensive and detailed information regarding mitochondrial activity and efficiency, and, after preparative steps, it takes 6-8 h to complete.

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Year:  2014        PMID： 24457333      PMCID： PMC4063296          DOI： 10.1038/nprot.2014.018

Source DB:  PubMed          Journal:  Nat Protoc        ISSN： 1750-2799            Impact factor:   13.491


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