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Microscale Oxygraphy Reveals OXPHOS Impairment in MRC Mutant Cells

Overview
Journal Mitochondrion
Specialty Cell Biology
Date 2012 Feb 8
PMID 22310368
Citations 65
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Abstract

Given the complexity of the respiratory chain structure, assembly and regulation, the diagnostic workout for the identification of defects of oxidative phosphorylation (OXPHOS) is a major challenge. Spectrophotometric assays, that measure the activity of individual respiratory complexes in tissue and cell homogenates or isolated mitochondria, are highly specific, but their utilization is limited by the availability of sufficient biological material and intrinsic sensitivity. A further limitation is tissue specificity, which usually determines attenuation, or disappearance, in cultured fibroblasts, of defects detected in muscle or liver. We used numerous fibroblast cell lines derived from patients with OXPHOS deficiencies to set up experimental protocols required for the direct readout of cellular respiration using the Seahorse XF96 apparatus, which measures oxygen consumption rate (OCR) and extra-cellular acidification rate (ECAR) in 96 well plates. Results demonstrate that first level screening based on microscale oxygraphy is more sensitive, cheaper and rapid than spectrophotometry for the biochemical evaluation of cells from patients with suspected mitochondrial disorders.

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References
1.
Fernandez-Vizarra E, Bugiani M, Goffrini P, Carrara F, Farina L, Procopio E . Impaired complex III assembly associated with BCS1L gene mutations in isolated mitochondrial encephalopathy. Hum Mol Genet. 2007; 16(10):1241-52. DOI: 10.1093/hmg/ddm072. View

2.
Bugiani M, Tiranti V, Farina L, Uziel G, Zeviani M . Novel mutations in COX15 in a long surviving Leigh syndrome patient with cytochrome c oxidase deficiency. J Med Genet. 2005; 42(5):e28. PMC: 1736058. DOI: 10.1136/jmg.2004.029926. View

3.
Kirby D, Thorburn D, Turnbull D, Taylor R . Biochemical assays of respiratory chain complex activity. Methods Cell Biol. 2007; 80:93-119. DOI: 10.1016/S0091-679X(06)80004-X. View

4.
Smeitink J, Zeviani M, Turnbull D, Jacobs H . Mitochondrial medicine: a metabolic perspective on the pathology of oxidative phosphorylation disorders. Cell Metab. 2006; 3(1):9-13. DOI: 10.1016/j.cmet.2005.12.001. View

5.
Bugiani M, Invernizzi F, Alberio S, Briem E, Lamantea E, Carrara F . Clinical and molecular findings in children with complex I deficiency. Biochim Biophys Acta. 2004; 1659(2-3):136-47. DOI: 10.1016/j.bbabio.2004.09.006. View