Djafarzadeh 2017b J Vis Exp

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Publications in the MiPMap
Djafarzadeh S, Jakob SM (2017) Isolation of intact mitochondria from skeletal muscle by differential centrifugation for High-Resolution Respirometry measurements. J Vis Exp doi: 10.3791/55251.

Β» PMID: 28362420

Djafarzadeh S, Jakob SM (2017) J Vis Exp

Abstract: Mitochondria are involved in cellular energy metabolism and use oxygen to produce energy in the form of adenosine triphosphate (ATP). Differential centrifugation at low- and high-speed is commonly used to isolate mitochondria from tissues and cultured cells. Crude mitochondrial fractions obtained by differential centrifugation are used for respirometry measurements. The differential centrifugation technique is based on the separation of organelles according to their size and sedimentation velocity. The isolation of mitochondria is performed immediately after tissue harvesting. The tissue is immersed in an ice-cold homogenization medium, minced using scissors and homogenized in a glass homogenizer with a loose-fitting pestle. The differential centrifugation technique is efficient, fast and inexpensive and the mitochondria obtained by differential centrifugation are pure enough for respirometry assays. Some of the limitations and disadvantages of isolated mitochondria, based on differential centrifugation, are that the mitochondria can be damaged during the homogenization and isolation procedure and that large amounts of the tissue biopsy or cultured cells are required for the mitochondrial isolation. β€’ Keywords: Mitochondria, Mitochondrial isolation, Differential centrifugation, Oxidative phosphorylation, Oxygen consumption, Hhigh-Resolution Respirometry, Skeletal muscle β€’ Bioblast editor: Kandolf G β€’ O2k-Network Lab: CH Bern Djafarzadeh S

Labels: MiParea: Respiration, Instruments;methods 

Tissue;cell: Skeletal muscle  Preparation: Isolated mitochondria 

Coupling state: LEAK, OXPHOS  Pathway: N, S, CIV, NS  HRR: Oxygraph-2k 

Labels, 2017-11 

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