Difference between revisions of "Menin 2001 Mol Cell Biochem"
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{{Publication | {{Publication | ||
|title=Menin L, Panchichkina M, Keriel C, Olivares J, Braun U, Seppet EK, Saks VA (2001) Macrocompartmentation of total creatine in cardiomyocytes revisited. Mol Cell Biochem 220: 149- | |title=Menin L, Panchichkina M, Keriel C, Olivares J, Braun U, Seppet EK, Saks VA (2001) Macrocompartmentation of total creatine in cardiomyocytes revisited. Mol Cell Biochem 220:149-59. | ||
|info=[http://www.ncbi.nlm.nih.gov/pubmed/11451375 PMID: 11451375 ] | |info=[http://www.ncbi.nlm.nih.gov/pubmed/11451375 PMID: 11451375 ] | ||
|authors=Menin L, Panchichkina M, Keriel C, Olivares J, Braun U, Seppet EK, Saks VA | |authors=Menin L, Panchichkina M, Keriel C, Olivares J, Braun U, Seppet EK, Saks VA | ||
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|abstract=Distribution of total creatine (free creatine + phosphocreatine) between two subcellular macrocompartments – mitochondrial matrix space and cytoplasm – in heart and skeletal muscle cells was reinvestigated by using a permeabilized cell technique. Isolated cardiomyocytes were treated with saponin (50 mgrg/ml for 30 min or 600 mgrg/ml for 1 min) to open the outer cellular membrane and release the metabolites from cytoplasm (cytoplasmic fraction, CF). All mitochondrial population in permeabilized cells remained intact: the outer membrane was impermeable for exogenous cytochrome c, the acceptor control index of respiration exceeded 10, the mitochondrial creatine kinase reaction was fully coupled to the adenine nucleotide translocator. Metabolites were released from mitochondrial fraction (MF) by 2–5% Triton X100. Total cellular pool of free creatine + phosphocreatine (69.6 ± 2.1 nmoles per mg of protein) was found exclusively in CF and was practically absent in MF. When fibers were prepared from perfused rat hearts, cellular distribution of creatine was not dependent on functional state of the heart and only slightly modified by ischemia. It is concluded that there is no stable pool of creatine or phosphocreatine in the mitochondrial matrix in the intact muscle cells, and the total creatine pool is localized in only one macrocompartment – cytoplasm. | |abstract=Distribution of total creatine (free creatine + phosphocreatine) between two subcellular macrocompartments – mitochondrial matrix space and cytoplasm – in heart and skeletal muscle cells was reinvestigated by using a permeabilized cell technique. Isolated cardiomyocytes were treated with saponin (50 mgrg/ml for 30 min or 600 mgrg/ml for 1 min) to open the outer cellular membrane and release the metabolites from cytoplasm (cytoplasmic fraction, CF). All mitochondrial population in permeabilized cells remained intact: the outer membrane was impermeable for exogenous cytochrome c, the acceptor control index of respiration exceeded 10, the mitochondrial creatine kinase reaction was fully coupled to the adenine nucleotide translocator. Metabolites were released from mitochondrial fraction (MF) by 2–5% Triton X100. Total cellular pool of free creatine + phosphocreatine (69.6 ± 2.1 nmoles per mg of protein) was found exclusively in CF and was practically absent in MF. When fibers were prepared from perfused rat hearts, cellular distribution of creatine was not dependent on functional state of the heart and only slightly modified by ischemia. It is concluded that there is no stable pool of creatine or phosphocreatine in the mitochondrial matrix in the intact muscle cells, and the total creatine pool is localized in only one macrocompartment – cytoplasm. | ||
|keywords=Heart, Skeletal muscle, Mitochondria, Creatine, Phosphocreatine, Compartmentation | |keywords=Heart, Skeletal muscle, Mitochondria, Creatine, Phosphocreatine, Compartmentation | ||
|mipnetlab=EE Tallinn Saks VA, EE Tartu | |mipnetlab=EE Tallinn Saks VA, EE Tartu Paju K | ||
|discipline=Mitochondrial Physiology | |discipline=Mitochondrial Physiology | ||
}} | }} | ||
{{Labeling | {{Labeling | ||
|tissues=Heart | |||
|preparations=Permeabilized tissue | |||
|couplingstates=OXPHOS | |||
|instruments=Oxygraph-2k | |instruments=Oxygraph-2k | ||
|discipline=Mitochondrial Physiology | |discipline=Mitochondrial Physiology | ||
}} | }} | ||
Latest revision as of 15:53, 8 June 2015
| Menin L, Panchichkina M, Keriel C, Olivares J, Braun U, Seppet EK, Saks VA (2001) Macrocompartmentation of total creatine in cardiomyocytes revisited. Mol Cell Biochem 220:149-59. |
Menin L, Panchichkina M, Keriel C, Olivares J, Braun U, Seppet EK, Saks VA (2001) Mol Cell Biochem
Abstract: Distribution of total creatine (free creatine + phosphocreatine) between two subcellular macrocompartments – mitochondrial matrix space and cytoplasm – in heart and skeletal muscle cells was reinvestigated by using a permeabilized cell technique. Isolated cardiomyocytes were treated with saponin (50 mgrg/ml for 30 min or 600 mgrg/ml for 1 min) to open the outer cellular membrane and release the metabolites from cytoplasm (cytoplasmic fraction, CF). All mitochondrial population in permeabilized cells remained intact: the outer membrane was impermeable for exogenous cytochrome c, the acceptor control index of respiration exceeded 10, the mitochondrial creatine kinase reaction was fully coupled to the adenine nucleotide translocator. Metabolites were released from mitochondrial fraction (MF) by 2–5% Triton X100. Total cellular pool of free creatine + phosphocreatine (69.6 ± 2.1 nmoles per mg of protein) was found exclusively in CF and was practically absent in MF. When fibers were prepared from perfused rat hearts, cellular distribution of creatine was not dependent on functional state of the heart and only slightly modified by ischemia. It is concluded that there is no stable pool of creatine or phosphocreatine in the mitochondrial matrix in the intact muscle cells, and the total creatine pool is localized in only one macrocompartment – cytoplasm. • Keywords: Heart, Skeletal muscle, Mitochondria, Creatine, Phosphocreatine, Compartmentation
• O2k-Network Lab: EE Tallinn Saks VA, EE Tartu Paju K
Labels:
Tissue;cell: Heart Preparation: Permeabilized tissue
Coupling state: OXPHOS
HRR: Oxygraph-2k
