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1,151 results on '"Chinnery, P"'

201. Task-Based Parallel Programming for Gate Sizing

Author

Mangiras, Dimitrios, Chinnery, David, and Dimitrakopoulos, Giorgos

Abstract

Physical synthesis engines need to embrace all available parallelism to cope with the increasing complexity of modern designs and still offer high quality of results. To achieve this goal, the involved algorithms need to be expressed in a way that facilitates fast execution time across a range of computing platforms. In this work, we introduce a task-based parallel programming template that can be used for speeding up timing and power optimization. This approach utilizes all available parallelism and enables significant speedup relative to custom multithreaded approaches. Task-based parallelism is applied to all parts of the optimization engine covering also parts that are traditionally executed serially for preserving maximum timing accuracy. Using Taskflow as the parallel programming and execution engine, we achieved a speedup of $1.7\times $ to $2.8\times $ for gate sizing optimizations on the ISPD13 benchmarks with marginal extra leakage power relative to state-of-the-art multithreaded gate sizers. This result was supported by two dynamic heuristics that restrict the number of examined gate sizes and simplify local timing updates. Both heuristics tradeoff additional runtime reduction with marginal leakage power increases.

Published
2023
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202. Raised intraocular pressure as a potential risk factor for visual loss in Leber Hereditary Optic Neuropathy.

Author

Anais Thouin, Philip G Griffiths, Gavin Hudson, Patrick F Chinnery, and Patrick Yu-Wai-Man

Subjects
Medicine, Science
Abstract

Leber Hereditary Optic Neuropathy (LHON) is an important cause of inherited mitochondrial blindness among young adults. The majority of patients carry one of three mitochondrial DNA (mtDNA) point mutations: m.3460G>A, m.11778G>A and m.14484T>C, all of which affect critical complex I subunits of the mitochondrial respiratory chain. LHON is characterised by marked incomplete penetrance, clearly implying that the mtDNA mutation is insufficient on its own to trigger retinal ganglion cell dysfunction and visual loss. In this case series of three affected patients harbouring the m.11778G>A mutation, we provide evidence suggesting that raised intraocular pressure could be a risk factor triggering visual loss in at-risk LHON carriers.

Published
2013
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203. Extraocular muscle atrophy and central nervous system involvement in chronic progressive external ophthalmoplegia.

Author

Cynthia Yu-Wai-Man, Fiona E Smith, Michael J Firbank, Grant Guthrie, Stuart Guthrie, Grainne S Gorman, Robert W Taylor, Douglass M Turnbull, Philip G Griffiths, Andrew M Blamire, Patrick F Chinnery, and Patrick Yu-Wai-Man

Subjects
Medicine, Science
Abstract

BACKGROUND:Chronic progressive external ophthalmoplegia (CPEO) is a classical mitochondrial ocular disorder characterised by bilateral progressive ptosis and ophthalmoplegia. These ocular features can develop either in isolation or in association with other prominent neurological deficits (CPEO+). Molecularly, CPEO can be classified into two distinct genetic subgroups depending on whether patients harbour single, large-scale mitochondrial DNA (mtDNA) deletions or multiple mtDNA deletions secondary to a nuclear mutation disrupting mtDNA replication or repair. The aim of this magnetic resonance imaging (MRI) study was to investigate whether the ophthalmoplegia in CPEO is primarily myopathic in origin or whether there is evidence of contributory supranuclear pathway dysfunction. METHODS:Ten age-matched normal controls and twenty patients with CPEO were recruited nine patients with single, large-scale mtDNA deletions and eleven patients with multiple mtDNA deletions secondary to mutations in POLG, PEO1, OPA1, and RRM2B. All subjects underwent a standardised brain and orbital MRI protocol, together with proton magnetic resonance spectroscopy in two voxels located within the parietal white matter and the brainstem. RESULTS:There was evidence of significant extraocular muscle atrophy in patients with single or multiple mtDNA deletions compared with controls. There was no significant difference in metabolite concentrations between the patient and control groups in both the parietal white matter and brainstem voxels. Volumetric brain measurements revealed marked cortical and cerebellar atrophy among patients with CPEO+ phenotypes. CONCLUSION:The results of this study support a primary myopathic aetiology for the progressive limitation of eye movements that develops in CPEO.

Published
2013
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204. Environmental oxygen tension regulates the energy metabolism and self-renewal of human embryonic stem cells.

Author

Catherine E Forristal, David R Christensen, Fay E Chinnery, Raffaella Petruzzelli, Kate L Parry, Tilman Sanchez-Elsner, and Franchesca D Houghton

Subjects
Medicine, Science
Abstract

Energy metabolism is intrinsic to cell viability but surprisingly has been little studied in human embryonic stem cells (hESCs). The current study aims to investigate the effect of environmental O2 tension on carbohydrate utilisation of hESCs. Highly pluripotent hESCs cultured at 5% O2 consumed significantly more glucose, less pyruvate and produced more lactate compared to those maintained at 20% O2. Moreover, hESCs cultured at atmospheric O2 levels expressed significantly less OCT4, SOX2 and NANOG than those maintained at 5% O2. To determine whether this difference in metabolism was a reflection of the pluripotent state, hESCs were cultured at 5% O2 in the absence of FGF2 for 16 hours leading to a significant reduction in the expression of SOX2. In addition, these cells consumed less glucose and produced significantly less lactate compared to those cultured in the presence of FGF2. hESCs maintained at 5% O2 were found to consume significantly less O2 than those cultured in the absence of FGF2, or at 20% O2. GLUT1 expression correlated with glucose consumption and using siRNA and chromatin immunoprecipitation was found to be directly regulated by hypoxia inducible factor (HIF)-2α at 5% O2. In conclusion, highly pluripotent cells associated with hypoxic culture consume low levels of O2, high levels of glucose and produce large amounts of lactate, while at atmospheric conditions glucose consumption and lactate production are reduced and there is an increase in oxidative metabolism. These data suggest that environmental O2 regulates energy metabolism and is intrinsic to the self-renewal of hESCs.

Published
2013
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206. Replication of association between ELAVL4 and Parkinson disease: the GenePD study

Author

DeStefano, Anita L., Latourelle, Jeanne, Lew, Mark F., Suchowersky, Oksana, Klein, Christine, Golbe, Lawrence I., Mark, Margery H., Growdon, John H., Wooten, G. Fredrick, Watts, Ray, Guttman, Mark, Racette, Brad A., Perlmutter, Joel S., Marlor, Lynn, Shill, Holly A., Singer, Carlos, Goldwurm, Stefano, Pezzoli, Gianni, Saint-Hilaire, Marie H., Hendricks, Audrey E., Gower, Adam, Williamson, Sally, Nagle, Michael W., Wilk, Jemma B., Massood, Tiffany, Huskey, Karen W., Baker, Kenneth B., Itin, Ilia, Litvan, Irene, Nicholson, Garth, Corbett, Alastair, Nance, Martha, Drasby, Edward, Isaacson, Stuart, Burn, David J., Chinnery, Patrick F., Pramstaller, Peter P., Al-hinti, Jomana, Moller, Anette T., Ostergaard, Karen, Sherman, Scott J., Roxburgh, Richard, Snow, Barry, Slevin, John T., Cambi, Franca, Gusella, James F., and Myers, Richard H.

Published
2008
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209. Treatabolome: a rare diseases treatment awareness project

Author

Atalaia, A, Thompson, R, Corvo, A, Carmody, L, Piscia, D, Matalonga, L, Macaya, A, Lochmuller, A, Fontaine, B, Zurek, B, Hernandez-Ferrer, C, Rheinard, C, Gómez-Andrés, D, Schon, K, Lohmann, K, Jennings, M, Riess, O, Ben Yaou, R, Evangelista, T, Ratnaike, T, Bros-Facer, V, Gumus, G, Horvath, R, Chinnery, P, Laurie, S, Graessner, H, Robinson, P, Lochmuller, H, Beltran, S, Bonne, Gisèle, Centre de recherche en Myologie – U974 SU-INSERM, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), University of North Carolina [Chapel Hill] (UNC), University of North Carolina System (UNC), Institut de Myologie, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Sorbonne Université - Faculté de Médecine (SU FM), Sorbonne Université (SU), Centre for Energy Research [Budapest] (MTAE), Hungarian Academy of Sciences (MTA), and Newcastle University [Newcastle]

Subjects
[SDV.GEN]Life Sciences [q-bio]/Genetics, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, [SDV]Life Sciences [q-bio], rare diseases
Abstract

International audience

Published
2020

210. Correction to: A nonsynonymous mutation in PLCG2 reduces the risk of Alzheimer’s disease, dementia with Lewy bodies and frontotemporal dementia, and increases the likelihood of longevity (Acta Neuropathologica, (2019), 138, 2, (237-250), 10.1007/s00401-019-02026-8)

Author

van der Lee, S. J., Conway, O. J., Jansen, I., Carrasquillo, M. M., Kleineidam, L., van den Akker, E., Hernandez, I., van Eijk, K. R., Stringa, N., Chen, J. A., Zettergren, A., Andlauer, T. F. M., Diez-Fairen, M., Simon-Sanchez, J., Lleo, A., Zetterberg, H., Nygaard, M., Blauwendraat, C., Savage, J. E., Mengel-From, J., Moreno-Grau, S., Wagner, M., Fortea, J., Keogh, M. J., Blennow, K., Skoog, I., Friese, M. A., Pletnikova, O., Zulaica, M., Lage, C., de Rojas, I., Riedel-Heller, S., Illan-Gala, I., Wei, W., Jeune, B., Orellana, A., Then Bergh, F., Wang, X., Hulsman, M., Beker, N., Tesi, N., Morris, C. M., Indakoetxea, B., Collij, L. E., Scherer, M., Morenas-Rodriguez, E., Ironside, J. W., van Berckel, B. N. M., Alcolea, D., Wiendl, H., Strickland, S. L., Pastor, P., Rodriguez Rodriguez, E., Mead, S., Synofzik, M., van Swieten, J. C., Leber, I., Ferrari, R., Hernandez, D. G., Nalls, M. A., Rohrer, J. D., Ramasamy, A., Kwok, J. B. J., Dobson-Stone, C., Schofield, P. R., Halliday, G. M., Hodges, J. R., Piguet, O., Bartley, L., Thompson, E., Borroni, B., Padovani, A., Cruchaga, C., Cairns, N. J., Benussi, L., Binetti, G., Ghidoni, R., Forloni, G., Albani, D., Galimberti, D., Fenoglio, C., Serpente, M., Scarpini, E., Blesa, R., Landqvist Waldo, M., Nilsson, K., Nilsson, C., Mackenzie, I. R. A., Hsiung, G. -Y. R., Mann, D. M. A., Grafman, J., Attems, J., Griffiths, T. D., Mckeith, I. G., Thomas, A. J., Pietrini, P., Huey, E. D., Wassermann, E. M., Baborie, A., Jaros, E., Tierney, M. C., Razquin, C., Ortega-Cubero, S., Alonso, E., Perneczky, R., Diehl-Schmid, J., Alexopoulos, P., Kurz, A., Rainero, I., Rubino, E., Pinessi, L., Rogaeva, E., St George-Hyslop, P., Rossi, G., Tagliavini, F., Giaccone, G., Rowe, J. B., Schlachetzki, J. C. M., Uphill, J., Collinge, J., Danek, A., Van Deerlin, V. M., Grossman, M., Trojanowski, J. Q., van der Zee, J., Van Broeckhoven, C., Cappa, S. F., Hannequin, D., Golfier, V., Vercelletto, M., Brice, A., Nacmias, B., Sorbi, S., Bagnoli, S., Piaceri, I., Nielsen, J. E., Hjermind, L. E., Riemenschneider, M., Mayhaus, M., Ibach, B., Gasparoni, G., Pichler, S., Gu, W., Rossor, M. N., Fox, N. C., Warren, J. D., Spillantini, M. G., Morris, H. R., Rizzu, P., Snowden, J. S., Rollinson, S., Richardson, A., Gerhard, A., Bruni, A. C., Maletta, R., Frangipane, F., Cupidi, C., Bernardi, L., Anfossi, M., Gallo, M., Conidi, M. E., Smirne, N., Baker, M., Josephs, K. A., Parisi, J. E., Seeley, W. W., Miller, B. L., Karydas, A. M., Rosen, H., Dopper, E. G. P., Seelaar, H., Logroscino, G., Capozzo, R., Novelli, V., Puca, A. A., Franceschi, M., Postiglione, A., Milan, G., Sorrentino, P., Kristiansen, M., Chiang, H. -H., Graff, C., Pasquier, F., Rollin, A., Deramecourt, V., Lebouvier, T., Kapogiannis, D., Ferrucci, L., Pickering-Brown, S., Singleton, A. B., Hardy, J., Momeni, P., Boeve, B. F., Petersen, R. C., Ferman, T. J., van Gerpen, J. A., Reinders, M. J. T., Uitti, R. J., Tarraga, L., Maier, W., Dols-Icardo, O., Kawalia, A., Dalmasso, M. C., Boada, M., Zettl, U. K., van Schoor, N. M., Beekman, M., Allen, M., Masliah, E., de Munain, A. L., Pantelyat, A., Wszolek, Z. K., Ross, O. A., Dickson, D. W., Graff-Radford, N. R., Knopman, D., Rademakers, R., Lemstra, A. W., Pijnenburg, Y. A. L., Scheltens, P., Gasser, T., Chinnery, P. F., Hemmer, B., Huisman, M. A., Troncoso, J., Moreno, F., Nohr, E. A., Sorensen, T. I. A., Heutink, P., Sanchez-Juan, P., Posthuma, D., Coppola, G., Varpetian, A., Foroud, T. M., Levey, A. I., Kukull, W. A., Mendez, M. F., Ringman, J., Chui, H., Cotman, C., Decarli, C., Geschwind, D. H., Clarimon, J., Christensen, K., Ertekin-Taner, N., Scholz, S. W., Ramirez, A., Ruiz, A., Slagboom, E., van der Flier, W. M., Holstege, H., Neurology, Epidemiology and Data Science, Human genetics, APH - Societal Participation & Health, APH - Aging & Later Life, Amsterdam Neuroscience - Complex Trait Genetics, APH - Personalized Medicine, and APH - Methodology

Subjects
education
Abstract

The IPDGC (The International Parkinson Disease Genomics Consortium) and EADB (Alzheimer Disease European DNA biobank) are listed correctly as an author to the article, however, they were incorrectly listed more than once.

Published
2020

211. Non-random mtDNA segregation patterns indicate a metastable heteroplasmic segregation unit in m.3243A>G cybrid cells.

Author

Anton K Raap, Roshan S Jahangir Tafrechi, Frans M van de Rijke, Angela Pyle, Carolina Wählby, Karoly Szuhai, Raimond B G Ravelli, René F M de Coo, Harsha K Rajasimha, Mats Nilsson, Patrick F Chinnery, David C Samuels, and George M C Janssen

Subjects
Medicine, Science
Abstract

Many pathogenic mitochondrial DNA mutations are heteroplasmic, with a mixture of mutated and wild-type mtDNA present within individual cells. The severity and extent of the clinical phenotype is largely due to the distribution of mutated molecules between cells in different tissues, but mechanisms underpinning segregation are not fully understood. To facilitate mtDNA segregation studies we developed assays that measure m.3243A>G point mutation loads directly in hundreds of individual cells to determine the mechanisms of segregation over time. In the first study of this size, we observed a number of discrete shifts in cellular heteroplasmy between periods of stable heteroplasmy. The observed patterns could not be parsimoniously explained by random mitotic drift of individual mtDNAs. Instead, a genetically metastable, heteroplasmic mtDNA segregation unit provides the likely explanation, where stable heteroplasmy is maintained through the faithful replication of segregating units with a fixed wild-type/m.3243A>G mutant ratio, and shifts occur through the temporary disruption and re-organization of the segregation units. While the nature of the physical equivalent of the segregation unit remains uncertain, the factors regulating its organization are of major importance for the pathogenesis of mtDNA diseases.

Published
2012
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212. Metabolic shift underlies recovery in reversible infantile respiratory chain deficiency

Author

Hathazi, D. (Denisa), Griffin, H. (Helen), Jennings, M. J. (Matthew J.), Giunta, M. (Michele), Powell, C. (Christopher), Pearce, S. F. (Sarah F.), Munro, B. (Benjamin), Wei, W. (Wei), Boczonadi, V. (Veronika), Poulton, J. (Joanna), Pyle, A. (Angela), Calabrese, C. (Claudia), Gomez‐Duran, A. (Aurora), Schara, U. (Ulrike), Pitceathly, R. D. (Robert D. S.), Hanna, M. G. (Michael G.), Joost, K. (Kairit), Cotta, A. (Ana), Paim, J. F. (Julia Filardi), Navarro, M. M. (Monica Machado), Duff, J. (Jennifer), Mattman, A. (Andre), Chapman, K. (Kristine), Servidei, S. (Serenella), Marina, A. D. (Adela Della), Uusimaa, J. (Johanna), Roos, A. (Andreas), Mootha, V. (Vamsi), Hirano, M. (Michio), Tulinius, M. (Mar), Giri, M. (Mamta), Hoffmann, E. P. (Eric P.), Lochmüller, H. (Hanns), DiMauro, S. (Salvatore), Minczuk, M. (Michal), Chinnery, P. F. (Patrick F.), Müller, J. S. (Juliane S.), Horvath, R. (Rita), Hathazi, D. (Denisa), Griffin, H. (Helen), Jennings, M. J. (Matthew J.), Giunta, M. (Michele), Powell, C. (Christopher), Pearce, S. F. (Sarah F.), Munro, B. (Benjamin), Wei, W. (Wei), Boczonadi, V. (Veronika), Poulton, J. (Joanna), Pyle, A. (Angela), Calabrese, C. (Claudia), Gomez‐Duran, A. (Aurora), Schara, U. (Ulrike), Pitceathly, R. D. (Robert D. S.), Hanna, M. G. (Michael G.), Joost, K. (Kairit), Cotta, A. (Ana), Paim, J. F. (Julia Filardi), Navarro, M. M. (Monica Machado), Duff, J. (Jennifer), Mattman, A. (Andre), Chapman, K. (Kristine), Servidei, S. (Serenella), Marina, A. D. (Adela Della), Uusimaa, J. (Johanna), Roos, A. (Andreas), Mootha, V. (Vamsi), Hirano, M. (Michio), Tulinius, M. (Mar), Giri, M. (Mamta), Hoffmann, E. P. (Eric P.), Lochmüller, H. (Hanns), DiMauro, S. (Salvatore), Minczuk, M. (Michal), Chinnery, P. F. (Patrick F.), Müller, J. S. (Juliane S.), and Horvath, R. (Rita)

Abstract

Reversible infantile respiratory chain deficiency (RIRCD) is a rare mitochondrial myopathy leading to severe metabolic disturbances in infants, which recover spontaneously after 6‐months of age. RIRCD is associated with the homoplasmic m.14674T>C mitochondrial DNA mutation; however, only ~ 1/100 carriers develop the disease. We studied 27 affected and 15 unaffected individuals from 19 families and found additional heterozygous mutations in nuclear genes interacting with mt‐tRNAGlu including EARS2 and TRMU in the majority of affected individuals, but not in healthy carriers of m.14674T>C, supporting a digenic inheritance. Our transcriptomic and proteomic analysis of patient muscle suggests a stepwise mechanism where first, the integrated stress response associated with increased FGF21 and GDF15 expression enhances the metabolism modulated by serine biosynthesis, one carbon metabolism, TCA lipid oxidation and amino acid availability, while in the second step mTOR activation leads to increased mitochondrial biogenesis. Our data suggest that the spontaneous recovery in infants with digenic mutations may be modulated by the above described changes. Similar mechanisms may explain the variable penetrance and tissue specificity of other mtDNA mutations and highlight the potential role of amino acids in improving mitochondrial disease.

Published
2020

214. Science and Shakespeare.

Author

Mah, Steven and Chinnery, Charlene

Abstract

Describes an assignment in which the preservice teacher must find a connection between science and Shakespeare. Connects the science of the witches in Shakespeare's "Macbeth" to the holistic approach of education. (SG)

Published
2003

219. Heterozygous UCHL1loss-of-function variants cause a neurodegenerative disorder with spasticity, ataxia, neuropathy, and optic atrophy

Author

Park, Joohyun, Tucci, Arianna, Cipriani, Valentina, Demidov, German, Rocca, Clarissa, Senderek, Jan, Butryn, Michaela, Velic, Ana, Lam, Tanya, Galanaki, Evangelia, Cali, Elisa, Vestito, Letizia, Maroofian, Reza, Deininger, Natalie, Rautenberg, Maren, Admard, Jakob, Hahn, Gesa-Astrid, Bartels, Claudius, van Os, Nienke J.H., Horvath, Rita, Chinnery, Patrick F., Tiet, May Yung, Hewamadduma, Channa, Hadjivassiliou, Marios, Tofaris, George K., Ambrose, J.C., Arumugam, P., Baple, E.L., Bleda, M., Boardman-Pretty, F., Boissiere, J.M., Boustred, C.R., Brittain, H., Caulfield, M.J., Chan, G.C., Craig, C.E.H., Daugherty, L.C., de Burca, A., Devereau, A., Elgar, G., Foulger, R.E., Fowler, T., Furió-Tarí, P., Hackett, J.M., Halai, D., Hamblin, A., Henderson, S., Holman, J.E., Hubbard, T.J.P., Ibáñez, K., Jackson, R., Jones, L.J., Kasperaviciute, D., Kayikci, M., Lahnstein, L., Lawson, K., Leigh, S.E.A., Leong, I.U.S., Lopez, F.J., Maleady-Crowe, F., Mason, J., McDonagh, E.M., Moutsianas, L., Mueller, M., Murugaesu, N., Need, A.C., Odhams, C.A., Patch, C., Perez-Gil, D., Polychronopoulos, D., Pullinger, J., Rahim, T., Rendon, A., Riesgo-Ferreiro, P., Rogers, T., Ryten, M., Savage, K., Sawant, K., Scott, R.H., Siddiq, A., Sieghart, A., Smedley, D., Smith, K.R., Sosinsky, A., Spooner, W., Stevens, H.E., Stuckey, A., Sultana, R., Thomas, E.R.A., Thompson, S.R., Tregidgo, C., Tucci, A., Walsh, E., Watters, S.A., Welland, M.J., Williams, E., Witkowska, K., Wood, S.M., Zarowiecki, M., Wood, Nicholas W., Hayer, Stefanie N., Bender, Friedemann, Menden, Benita, Cordts, Isabell, Klein, Katrin, Nguyen, Huu Phuc, Krauss, Joachim K., Blahak, Christian, Strom, Tim M., Sturm, Marc, van de Warrenburg, Bart, Lerche, Holger, Maček, Boris, Synofzik, Matthis, Ossowski, Stephan, Timmann, Dagmar, Wolf, Marc E., Smedley, Damian, Riess, Olaf, Schöls, Ludger, Houlden, Henry, Haack, Tobias B., and Hengel, Holger

Abstract

Biallelic variants in UCHL1have been associated with a progressive early-onset neurodegenerative disorder, autosomal recessive spastic paraplegia type 79. In this study, we investigated heterozygous UCHL1variants on the basis of results from cohort-based burden analyses.

Published
2022
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220. Investigation of the role of mitochondrial DNA in multiple sclerosis susceptibility.

Author

Maria Ban, Joanna Elson, Amie Walton, Douglas Turnbull, Alastair Compston, Patrick Chinnery, and Stephen Sawcer

Subjects
Medicine, Science
Abstract

Several lines of evidence suggest that mitochondrial genetic factors may influence susceptibility to multiple sclerosis. To explore this hypothesis further, we re-sequenced the mitochondrial genome (mtDNA) from 159 patients with multiple sclerosis and completed a haplogroup analysis including a further 835 patients and 1,506 controls. A trend towards over-representation of super-haplogroup U was the only evidence for association with mtDNA that we identified in these samples. In a parallel analysis of nuclear encoded mitochondrial genes, we also found a trend towards association with the complex I gene, NDUFS2. These results add to the evidence suggesting that variation in mtDNA and nuclear encoded mitochondrial genes may contribute to disease susceptibility in multiple sclerosis.

Published
2008
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221. Fatty Acid Mitochondrial Disorders

Author

Angelini, C., primary, Federico, A., additional, Reichmann, H., additional, Lombes, A., additional, Verney Saban, C., additional, Chinnery, P., additional, and Vissing, J., additional

Published
2010
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228. Allogeneic HSCT for mitochondrial neurogastrointestinal encephalomyopathy: the first promising effective treatment option in an otherwise unrelenting progressive disease?: O398

Author

Halter, J., Schüpbach, W. M.M., Casali, C., Elhasid, R., Keith, F., Savage, D., Valcarcel, D., Collin, M., Rovelli, A., Pintos, G., Marotta, G., Sobreira, C., Nachbaur, D., Accarino, A., Beguin, Y., Dotti, M. T., Hammans, S., Illa, I., Mandel, H., Marti, R., Sue, C., Bakker, J., Zoller, H., Chinnery, P., Gratwohl, A., Hirano, M., and Orchard, K.

Published
2011

236. Biallelic C1QBP Mutations Cause Severe Neonatal-, Childhood-, or Later-Onset Cardiomyopathy Associated with Combined Respiratory-Chain Deficiencies

Author

Feichtinger R. G., Olahova M., Kishita Y., Garone C., Kremer L. S., Yagi M., Uchiumi T., Jourdain A. A., Thompson K., D'Souza A. R., Kopajtich R., Alston C. L., Koch J., Sperl W., Mastantuono E., Strom T. M., Wortmann S. B., Meitinger T., Pierre G., Chinnery P. F., Chrzanowska-Lightowlers Z. M., Lightowlers R. N., DiMauro S., Calvo S. E., Mootha V. K., Moggio M., Sciacco M., Comi G. P., Ronchi D., Murayama K., Ohtake A., Rebelo-Guiomar P., Kohda M., Kang D., Mayr J. A., Taylor R. W., Okazaki Y., Minczuk M., Prokisch H., Garone, Caterina [0000-0003-4928-1037], Chinnery, Patrick [0000-0002-7065-6617], Minczuk, Michal [0000-0001-8242-1420], Apollo - University of Cambridge Repository, Feichtinger R.G., Olahova M., Kishita Y., Garone C., Kremer L.S., Yagi M., Uchiumi T., Jourdain A.A., Thompson K., D'Souza A.R., Kopajtich R., Alston C.L., Koch J., Sperl W., Mastantuono E., Strom T.M., Wortmann S.B., Meitinger T., Pierre G., Chinnery P.F., Chrzanowska-Lightowlers Z.M., Lightowlers R.N., DiMauro S., Calvo S.E., Mootha V.K., Moggio M., Sciacco M., Comi G.P., Ronchi D., Murayama K., Ohtake A., Rebelo-Guiomar P., Kohda M., Kang D., Mayr J.A., Taylor R.W., Okazaki Y., Minczuk M., and Prokisch H.

Subjects
Male, Mitochondrial Diseases, Protein Conformation, Sequence Homology, Severity of Illness Index, Cohort Studies, Mice, Mitochondrial Disease, Age of Onset, Cells, Cultured, Allele, multiple mtDNA deletions, Middle Aged, Pedigree, mitochondria, Child, Preschool, Adult, Aged, Alleles, Amino Acid Sequence, Animals, Cardiomyopathies/complications, Cardiomyopathies/genetics, Cardiomyopathies/pathology, Carrier Proteins/chemistry, Carrier Proteins/genetics, Carrier Proteins/metabolism, DNA, Mitochondrial, Electron Transport/physiology, Embryo, Mammalian/metabolism, Embryo, Mammalian/pathology, Female, Fibroblasts/metabolism, Fibroblasts/pathology, Humans, Infant, Newborn, Mitochondrial Diseases/complications, Mitochondrial Diseases/genetics, Mitochondrial Diseases/pathology, Mitochondrial Proteins/chemistry, Mitochondrial Proteins/genetics, Mitochondrial Proteins/metabolism, Mutation, Oxidative Phosphorylation, Young Adult, MAM33, PEO, lactate, myopathy, oxidative phosphorylation, p32, progressive external ophthalmoplegia, multiple mtDNA deletion, Fibroblast, Cardiomyopathies, Human, Article, Electron Transport, Mitochondrial Proteins, Mitochondrial Protein, Cardiomyopathie, Animal, Fibroblasts, Embryo, Mammalian, Cohort Studie, Carrier Protein, Carrier Proteins
Abstract

Complement component 1 Q subcomponent-binding protein (C1QBP; also known as p32) is a multi-compartmental protein whose precise function remains unknown. It is an evolutionary conserved multifunctional protein localized primarily in the mitochondrial matrix and has roles in inflammation and infection processes, mitochondrial ribosome biogenesis, and regulation of apoptosis and nuclear transcription. It has an N-terminal mitochondrial targeting peptide that is proteolytically processed after import into the mitochondrial matrix, where it forms a homotrimeric complex organized in a doughnut-shaped structure. Although C1QBP has been reported to exert pleiotropic effects on many cellular processes, we report here four individuals from unrelated families where biallelic mutations in C1QBP cause a defect in mitochondrial energy metabolism. Infants presented with cardiomyopathy accompanied by multisystemic involvement (liver, kidney, and brain), and children and adults presented with myopathy and progressive external ophthalmoplegia. Multiple mitochondrial respiratory-chain defects, associated with the accumulation of multiple deletions of mitochondrial DNA in the later-onset myopathic cases, were identified in all affected individuals. Steady-state C1QBP levels were decreased in all individuals' samples, leading to combined respiratory-chain enzyme deficiency of complexes I, III, and IV. C1qbp -/- mouse embryonic fibroblasts (MEFs) resembled the human disease phenotype by showing multiple defects in oxidative phosphorylation (OXPHOS). Complementation with wild-type, but not mutagenized, C1qbp restored OXPHOS protein levels and mitochondrial enzyme activities in C1qbp -/- MEFs. C1QBP deficiency represents an important mitochondrial disorder associated with a clinical spectrum ranging from infantile lactic acidosis to childhood (cardio)myopathy and late-onset progressive external ophthalmoplegia.

Published
2017

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