Logan 2014 Nat Genet: Difference between revisions
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|title=Logan CV, Szabadkai G, Sharpe JA, Parry DA, Torelli S, Childs AM, Kriek M, Phadke R, Johnson CA, Roberts NY, Bonthron DT, Pysden KA, Whyte T, Munteanu I, Foley AR, Wheway G, Szymanska K, Natarajan S, Abdelhamed ZA, Morgan JE, Roper H, Santen GW, Niks EH, van der Pol WL, Lindhout D, Raffaello A, De Stefani D, den Dunnen JT, Sun Y, Ginjaar I, Sewry CA, Hurles M, Rizzuto R. UK10K Consortium, Duchen MR, Muntoni F, Sheridan E (2013) Loss-of-function mutations in MICU1 cause a brain and muscle disorder linked to primary alterations in mitochondrial calcium signaling. Nat Genet | |title=Logan CV, Szabadkai G, Sharpe JA, Parry DA, Torelli S, Childs AM, Kriek M, Phadke R, Johnson CA, Roberts NY, Bonthron DT, Pysden KA, Whyte T, Munteanu I, Foley AR, Wheway G, Szymanska K, Natarajan S, Abdelhamed ZA, Morgan JE, Roper H, Santen GW, Niks EH, van der Pol WL, Lindhout D, Raffaello A, De Stefani D, den Dunnen JT, Sun Y, Ginjaar I, Sewry CA, Hurles M, Rizzuto R. UK10K Consortium, Duchen MR, Muntoni F, Sheridan E (2013) Loss-of-function mutations in MICU1 cause a brain and muscle disorder linked to primary alterations in mitochondrial calcium signaling. Nat Genet 46:188-93. | ||
|info=[http://www.ncbi.nlm.nih.gov/pubmed/24336167 PMID:24336167] | |info=[http://www.ncbi.nlm.nih.gov/pubmed/24336167 PMID:24336167] | ||
|authors=Logan CV, Szabadkai G, Sharpe JA, Parry DA, Torelli S, Childs AM, Kriek M, Phadke R, Johnson CA, Roberts NY, Bonthron DT, Pysden KA, Whyte T, Munteanu I, Foley AR, Wheway G, Szymanska K, Natarajan S, Abdelhamed ZA, Morgan JE, Roper H, Santen GW, Niks EH, van der Pol WL, Lindhout D, Raffaello A, De Stefani D, den Dunnen JT, Sun Y, Ginjaar I, Sewry CA, Hurles M, Rizzuto R. UK10K Consortium, Duchen MR, Muntoni F, Sheridan E | |authors=Logan CV, Szabadkai G, Sharpe JA, Parry DA, Torelli S, Childs AM, Kriek M, Phadke R, Johnson CA, Roberts NY, Bonthron DT, Pysden KA, Whyte T, Munteanu I, Foley AR, Wheway G, Szymanska K, Natarajan S, Abdelhamed ZA, Morgan JE, Roper H, Santen GW, Niks EH, van der Pol WL, Lindhout D, Raffaello A, De Stefani D, den Dunnen JT, Sun Y, Ginjaar I, Sewry CA, Hurles M, Rizzuto R. UK10K Consortium, Duchen MR, Muntoni F, Sheridan E | ||
|year= | |year=2014 | ||
|journal=Nat Genet | |journal=Nat Genet | ||
|abstract=Mitochondrial Ca2+ uptake has key roles in cell life and death. Physiological Ca2+ signaling regulates aerobic metabolism, whereas pathological Ca2+ overload triggers cell death. Mitochondrial Ca2+ uptake is mediated by the Ca2+ uniporter complex in the inner mitochondrial membrane, which comprises MCU, a Ca2+-selective ion channel, and its regulator, MICU1. Here we report mutations of MICU1 in individuals with a disease phenotype characterized by proximal myopathy, learning difficulties and a progressive extrapyramidal movement disorder. In fibroblasts from subjects with MICU1 mutations, agonist-induced mitochondrial Ca2+ uptake at low cytosolic Ca2+ concentrations was increased, and cytosolic Ca2+ signals were reduced. Although resting mitochondrial membrane potential was unchanged in MICU1-deficient cells, the mitochondrial network was severely fragmented. Whereas the pathophysiology of muscular dystrophy and the core myopathies involves abnormal mitochondrial Ca2+ handling, the phenotype associated with MICU1 deficiency is caused by a primary defect in mitochondrial Ca2+ signaling, demonstrating the crucial role of mitochondrial Ca2+ uptake in humans. | |abstract=Mitochondrial Ca2+ uptake has key roles in cell life and death. Physiological Ca2+ signaling regulates aerobic metabolism, whereas pathological Ca2+ overload triggers cell death. Mitochondrial Ca2+ uptake is mediated by the Ca2+ uniporter complex in the inner mitochondrial membrane, which comprises MCU, a Ca2+-selective ion channel, and its regulator, MICU1. Here we report mutations of MICU1 in individuals with a disease phenotype characterized by proximal myopathy, learning difficulties and a progressive extrapyramidal movement disorder. In fibroblasts from subjects with MICU1 mutations, agonist-induced mitochondrial Ca2+ uptake at low cytosolic Ca2+ concentrations was increased, and cytosolic Ca2+ signals were reduced. Although resting mitochondrial membrane potential was unchanged in MICU1-deficient cells, the mitochondrial network was severely fragmented. Whereas the pathophysiology of muscular dystrophy and the core myopathies involves abnormal mitochondrial Ca2+ handling, the phenotype associated with MICU1 deficiency is caused by a primary defect in mitochondrial Ca2+ signaling, demonstrating the crucial role of mitochondrial Ca2+ uptake in humans. | ||
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|area=Respiration | |area=Respiration | ||
|instruments=Oxygraph-2k | |instruments=Oxygraph-2k | ||
|additional= | |additional=labels | ||
}} | }} |
Revision as of 17:41, 2 March 2015
Logan CV, Szabadkai G, Sharpe JA, Parry DA, Torelli S, Childs AM, Kriek M, Phadke R, Johnson CA, Roberts NY, Bonthron DT, Pysden KA, Whyte T, Munteanu I, Foley AR, Wheway G, Szymanska K, Natarajan S, Abdelhamed ZA, Morgan JE, Roper H, Santen GW, Niks EH, van der Pol WL, Lindhout D, Raffaello A, De Stefani D, den Dunnen JT, Sun Y, Ginjaar I, Sewry CA, Hurles M, Rizzuto R. UK10K Consortium, Duchen MR, Muntoni F, Sheridan E (2013) Loss-of-function mutations in MICU1 cause a brain and muscle disorder linked to primary alterations in mitochondrial calcium signaling. Nat Genet 46:188-93. |
Logan CV, Szabadkai G, Sharpe JA, Parry DA, Torelli S, Childs AM, Kriek M, Phadke R, Johnson CA, Roberts NY, Bonthron DT, Pysden KA, Whyte T, Munteanu I, Foley AR, Wheway G, Szymanska K, Natarajan S, Abdelhamed ZA, Morgan JE, Roper H, Santen GW, Niks EH, van der Pol WL, Lindhout D, Raffaello A, De Stefani D, den Dunnen JT, Sun Y, Ginjaar I, Sewry CA, Hurles M, Rizzuto R. UK10K Consortium, Duchen MR, Muntoni F, Sheridan E (2014) Nat Genet
Abstract: Mitochondrial Ca2+ uptake has key roles in cell life and death. Physiological Ca2+ signaling regulates aerobic metabolism, whereas pathological Ca2+ overload triggers cell death. Mitochondrial Ca2+ uptake is mediated by the Ca2+ uniporter complex in the inner mitochondrial membrane, which comprises MCU, a Ca2+-selective ion channel, and its regulator, MICU1. Here we report mutations of MICU1 in individuals with a disease phenotype characterized by proximal myopathy, learning difficulties and a progressive extrapyramidal movement disorder. In fibroblasts from subjects with MICU1 mutations, agonist-induced mitochondrial Ca2+ uptake at low cytosolic Ca2+ concentrations was increased, and cytosolic Ca2+ signals were reduced. Although resting mitochondrial membrane potential was unchanged in MICU1-deficient cells, the mitochondrial network was severely fragmented. Whereas the pathophysiology of muscular dystrophy and the core myopathies involves abnormal mitochondrial Ca2+ handling, the phenotype associated with MICU1 deficiency is caused by a primary defect in mitochondrial Ca2+ signaling, demonstrating the crucial role of mitochondrial Ca2+ uptake in humans.
โข O2k-Network Lab: UK London Duchen MR
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