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Galera-Monge T, Zurita-Díaz F, Canals I, Grønning Hansen M, Rufián-Vázquez L, Ehinger JK, Elmér E, Martin MA, Garesse R, Ahlenius H, Gallardo ME. Mitochondrial Dysfunction and Calcium Dysregulation in Leigh Syndrome Induced Pluripotent Stem Cell Derived Neurons. Int J Mol Sci 2020; 21:ijms21093191. [PMID: 32366037 PMCID: PMC7247580 DOI: 10.3390/ijms21093191] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 04/28/2020] [Accepted: 04/28/2020] [Indexed: 12/28/2022] Open
Abstract
Leigh syndrome (LS) is the most frequent infantile mitochondrial disorder (MD) and is characterized by neurodegeneration and astrogliosis in the basal ganglia or the brain stem. At present, there is no cure or treatment for this disease, partly due to scarcity of LS models. Current models generally fail to recapitulate important traits of the disease. Therefore, there is an urgent need to develop new human in vitro models. Establishment of induced pluripotent stem cells (iPSCs) followed by differentiation into neurons is a powerful tool to obtain an in vitro model for LS. Here, we describe the generation and characterization of iPSCs, neural stem cells (NSCs) and iPSC-derived neurons harboring the mtDNA mutation m.13513G>A in heteroplasmy. We have performed mitochondrial characterization, analysis of electrophysiological properties and calcium imaging of LS neurons. Here, we show a clearly compromised oxidative phosphorylation (OXPHOS) function in LS patient neurons. This is also the first report of electrophysiological studies performed on iPSC-derived neurons harboring an mtDNA mutation, which revealed that, in spite of having identical electrical properties, diseased neurons manifested mitochondrial dysfunction together with a diminished calcium buffering capacity. This could lead to an overload of cytoplasmic calcium concentration and the consequent cell death observed in patients. Importantly, our results highlight the importance of calcium homeostasis in LS pathology.
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Affiliation(s)
- Teresa Galera-Monge
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain; (T.G.-M.); (F.Z.-D.); (R.G.)
- Departamento de Modelos Experimentales de Enfermedades Humanas, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red (CIBERER), 28029 Madrid, Spain; (L.R.-V.); (M.A.M.)
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i + 12), 28041 Madrid, Spain
| | - Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain; (T.G.-M.); (F.Z.-D.); (R.G.)
- Departamento de Modelos Experimentales de Enfermedades Humanas, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red (CIBERER), 28029 Madrid, Spain; (L.R.-V.); (M.A.M.)
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i + 12), 28041 Madrid, Spain
| | - Isaac Canals
- Department of Clinical Sciences, Neurology, Lund Stem Cell Center, Lund University, 221 00 Lund, Sweden; (I.C.); (M.G.H.)
| | - Marita Grønning Hansen
- Department of Clinical Sciences, Neurology, Lund Stem Cell Center, Lund University, 221 00 Lund, Sweden; (I.C.); (M.G.H.)
| | - Laura Rufián-Vázquez
- Centro de Investigación Biomédica en Red (CIBERER), 28029 Madrid, Spain; (L.R.-V.); (M.A.M.)
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i + 12), 28041 Madrid, Spain
- Laboratorio de enfermedades mitocondriales y Neurometabólicas, Hospital 12 de Octubre, 28041 Madrid, Spain
| | - Johannes K. Ehinger
- Mitochondrial Medicine, Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, BMC A13, 221 84 Lund, Sweden; (J.K.E.); (E.E.)
| | - Eskil Elmér
- Mitochondrial Medicine, Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, BMC A13, 221 84 Lund, Sweden; (J.K.E.); (E.E.)
| | - Miguel A. Martin
- Centro de Investigación Biomédica en Red (CIBERER), 28029 Madrid, Spain; (L.R.-V.); (M.A.M.)
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i + 12), 28041 Madrid, Spain
- Laboratorio de enfermedades mitocondriales y Neurometabólicas, Hospital 12 de Octubre, 28041 Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain; (T.G.-M.); (F.Z.-D.); (R.G.)
- Departamento de Modelos Experimentales de Enfermedades Humanas, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red (CIBERER), 28029 Madrid, Spain; (L.R.-V.); (M.A.M.)
| | - Henrik Ahlenius
- Department of Clinical Sciences, Neurology, Lund Stem Cell Center, Lund University, 221 00 Lund, Sweden; (I.C.); (M.G.H.)
- Correspondence: (H.A.); (M.E.G.)
| | - M. Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain; (T.G.-M.); (F.Z.-D.); (R.G.)
- Departamento de Modelos Experimentales de Enfermedades Humanas, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC, 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red (CIBERER), 28029 Madrid, Spain; (L.R.-V.); (M.A.M.)
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i + 12), 28041 Madrid, Spain
- Grupo de Investigación Traslacional con células iPS. Instituto de Investigación Sanitaria Hospital 12 de Octubre (i + 12), 28041 Madrid, Spain
- Correspondence: (H.A.); (M.E.G.)
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Galera-Monge T, Zurita-Díaz F, Garesse R, Gallardo ME. The mutation m.13513G>A impairs cardiac function, favoring a neuroectoderm commitment, in a mutant-load dependent way. J Cell Physiol 2019; 234:19511-19522. [PMID: 30950033 DOI: 10.1002/jcp.28549] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 01/01/2019] [Accepted: 01/25/2019] [Indexed: 12/31/2022]
Abstract
Mitochondrial disorders (MDs) arise as a result of a respiratory chain dysfunction. While some MDs can affect a single organ, many involve several organs, the brain being the most affected, followed by heart and/or muscle. Many of these diseases are associated with heteroplasmic mutations in the mitochondrial DNA (mtDNA). The proportion of mutated mtDNA must exceed a critical threshold to produce disease. Therefore, understanding how embryonic development determines the heteroplasmy level in each tissue could explain the organ susceptibility and the clinical heterogeneity observed in these patients. In this report, the dynamics of heteroplasmy and the influence in cardiac commitment of the mutational load of the m.13513G>A mutation has been analyzed. This mutation has been reported as a frequent cause of Leigh syndrome (LS) and is commonly associated with cardiac problems. In this report, induced pluripotent stem cell (iPSc) technology has been used to delve into the molecular mechanisms underlying cardiac disease in LS. When mutation m.13513G>A is above a threshold, iPSc-derived cardiomyocytes (iPSc-CMs) could not be obtained due to an inefficient epithelial-mesenchymal transition. Surprisingly, these cells are redirected toward neuroectodermal lineages that would give rise to the brain. However, when mutation is below that threshold, dysfunctional CM are generated in a mutant-load dependent way. We suggest that distribution of the m.13513G>A mutation during cardiac differentiation is not at random. We propose a possible explanation of why neuropathology is a frequent feature of MD, but cardiac involvement is not always present.
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Affiliation(s)
- Teresa Galera-Monge
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Bioquímica, Instituto de Investigaciones Bio médicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre, i+12. Centro de Actividades Ambulatorias. Avda. de Córdoba s/n, Madrid, Spain
| | - Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Bioquímica, Instituto de Investigaciones Bio médicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre, i+12. Centro de Actividades Ambulatorias. Avda. de Córdoba s/n, Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - María Esther Gallardo
- Instituto de Investigación Sanitaria Hospital 12 de Octubre, i+12. Centro de Actividades Ambulatorias. Avda. de Córdoba s/n, Madrid, Spain
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Ortuño-Costela MDC, Cerrada V, García-López M, Arenas J, Martínez J, Lucia A, Garesse R, Gallardo ME. Derivation of an aged mouse induced pluripotent stem cell line, IISHDOi005-A. Stem Cell Res 2019; 36:101418. [PMID: 30897488 DOI: 10.1016/j.scr.2019.101418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 03/05/2019] [Accepted: 03/11/2019] [Indexed: 12/23/2022] Open
Abstract
A mouse iPSC line, IISHDOi005-A, generated from fibroblasts obtained from a mouse C57BL/6J with an age of 1 year and a half, has been obtained. For this purpose, reprogramming factors Oct3/4, Sox2, Klf4, and c-Myc were delivered using Sendai virus.
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Affiliation(s)
- María Del Carmen Ortuño-Costela
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", UAM-CSIC, Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Victoria Cerrada
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Marta García-López
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Joaquín Arenas
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain
| | - Jesús Martínez
- Departamento de Investigación Básica, División de Biomedicina Epitelial, CIEMAT, Madrid, Spain
| | - Alejandro Lucia
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Universidad Europea de Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", UAM-CSIC, Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain
| | - M Esther Gallardo
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain.
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4
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Friederich MW, Timal S, Powell CA, Dallabona C, Kurolap A, Palacios-Zambrano S, Bratkovic D, Derks TGJ, Bick D, Bouman K, Chatfield KC, Damouny-Naoum N, Dishop MK, Falik-Zaccai TC, Fares F, Fedida A, Ferrero I, Gallagher RC, Garesse R, Gilberti M, González C, Gowan K, Habib C, Halligan RK, Kalfon L, Knight K, Lefeber D, Mamblona L, Mandel H, Mory A, Ottoson J, Paperna T, Pruijn GJM, Rebelo-Guiomar PF, Saada A, Sainz B, Salvemini H, Schoots MH, Smeitink JA, Szukszto MJ, Ter Horst HJ, van den Brandt F, van Spronsen FJ, Veltman JA, Wartchow E, Wintjes LT, Zohar Y, Fernández-Moreno MA, Baris HN, Donnini C, Minczuk M, Rodenburg RJ, Van Hove JLK. Pathogenic variants in glutamyl-tRNA Gln amidotransferase subunits cause a lethal mitochondrial cardiomyopathy disorder. Nat Commun 2018; 9:4065. [PMID: 30283131 PMCID: PMC6170436 DOI: 10.1038/s41467-018-06250-w] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 08/23/2018] [Indexed: 11/09/2022] Open
Abstract
Mitochondrial protein synthesis requires charging a mitochondrial tRNA with its amino acid. Here, the authors describe pathogenic variants in the GatCAB protein complex genes required for the generation of glutaminyl-mt-tRNAGln, that impairs mitochondrial translation and presents with cardiomyopathy. Mitochondrial protein synthesis requires charging mt-tRNAs with their cognate amino acids by mitochondrial aminoacyl-tRNA synthetases, with the exception of glutaminyl mt-tRNA (mt-tRNAGln). mt-tRNAGln is indirectly charged by a transamidation reaction involving the GatCAB aminoacyl-tRNA amidotransferase complex. Defects involving the mitochondrial protein synthesis machinery cause a broad spectrum of disorders, with often fatal outcome. Here, we describe nine patients from five families with genetic defects in a GatCAB complex subunit, including QRSL1, GATB, and GATC, each showing a lethal metabolic cardiomyopathy syndrome. Functional studies reveal combined respiratory chain enzyme deficiencies and mitochondrial dysfunction. Aminoacylation of mt-tRNAGln and mitochondrial protein translation are deficient in patients’ fibroblasts cultured in the absence of glutamine but restore in high glutamine. Lentiviral rescue experiments and modeling in S. cerevisiae homologs confirm pathogenicity. Our study completes a decade of investigations on mitochondrial aminoacylation disorders, starting with DARS2 and ending with the GatCAB complex.
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Affiliation(s)
- Marisa W Friederich
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado, Aurora, 80045, CO, USA
| | - Sharita Timal
- Radboud Center for Mitochondrial Medicine, Translational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands.,Department of Human Genetics, Radboud Institute for Molecular Life Sciences and Donders Centre for Neuroscience, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands
| | - Christopher A Powell
- Medical Research Council, Mitochondrial Biology Unit, University of Cambridge, Cambridge, CB2 OXY, United Kingdom
| | - Cristina Dallabona
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, 43124, Italy
| | - Alina Kurolap
- The Genetics Institute, Rambam Health Care Campus, Haifa, 3109601, Israel.,The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, 3109601, Israel
| | - Sara Palacios-Zambrano
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER). Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, 28041, Spain
| | - Drago Bratkovic
- SA Pathology, Women and Children's Hospital Adelaide, Adelaide, 5006, Australia
| | - Terry G J Derks
- Division of Metabolic Diseases, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, 9700 RB, The Netherlands
| | - David Bick
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, 35806, USA
| | - Katelijne Bouman
- Department of Genetics, University Medical Center of Groningen, University of Groningen, Groningen, 9700 RB, The Netherlands
| | - Kathryn C Chatfield
- Department of Pediatrics, Section of Pediatric Cardiology, Children's Hospital Colorado, University of Colorado, Aurora, CO, 80045, USA
| | - Nadine Damouny-Naoum
- The Genetics Institute, Rambam Health Care Campus, Haifa, 3109601, Israel.,Department of Human Biology, Faculty of Natural Sciences, University of Haifa, Haifa, 3498838, Israel
| | - Megan K Dishop
- Department of Pathology, Children's Hospital Colorado, University of Colorado, Aurora, 80045, CO, USA
| | - Tzipora C Falik-Zaccai
- Institute of Human Genetics, Galilee Medical Center, Nahariya, 22100, Israel.,The Azrieli Faculty of Medicine in the Galilee, Bar Ilan University, Safed, 1311502, Israel
| | - Fuad Fares
- Department of Human Biology, Faculty of Natural Sciences, University of Haifa, Haifa, 3498838, Israel
| | - Ayalla Fedida
- Institute of Human Genetics, Galilee Medical Center, Nahariya, 22100, Israel.,The Azrieli Faculty of Medicine in the Galilee, Bar Ilan University, Safed, 1311502, Israel
| | - Ileana Ferrero
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, 43124, Italy
| | - Renata C Gallagher
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado, Aurora, 80045, CO, USA
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER). Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, 28041, Spain
| | - Micol Gilberti
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, 43124, Italy
| | - Cristina González
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER). Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, 28041, Spain
| | - Katherine Gowan
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, CO, 80045, USA
| | - Clair Habib
- Department of Pediatrics, Bnai Zion Medical Center, Haifa, 3339419, Israel
| | - Rebecca K Halligan
- SA Pathology, Women and Children's Hospital Adelaide, Adelaide, 5006, Australia
| | - Limor Kalfon
- Institute of Human Genetics, Galilee Medical Center, Nahariya, 22100, Israel
| | - Kaz Knight
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado, Aurora, 80045, CO, USA
| | - Dirk Lefeber
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences and Donders Centre for Neuroscience, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands
| | - Laura Mamblona
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER). Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, 28041, Spain
| | - Hanna Mandel
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, 3109601, Israel.,Institute of Human Genetics, Galilee Medical Center, Nahariya, 22100, Israel.,Metabolic Unit, Rambam Health Care Campus, Haifa, 3109601, Israel
| | - Adi Mory
- The Genetics Institute, Rambam Health Care Campus, Haifa, 3109601, Israel
| | - John Ottoson
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado, Aurora, 80045, CO, USA
| | - Tamar Paperna
- The Genetics Institute, Rambam Health Care Campus, Haifa, 3109601, Israel
| | - Ger J M Pruijn
- Department of Biomolecular Chemistry, Institute for Molecules and Materials, Radboud University, Nijmegen, 6500 HB, The Netherlands
| | - Pedro F Rebelo-Guiomar
- Medical Research Council, Mitochondrial Biology Unit, University of Cambridge, Cambridge, CB2 OXY, United Kingdom.,Graduate Program in Areas of Basic and Applied Biology (GABBA), University of Porto, Porto, 4200-135, Portugal
| | - Ann Saada
- Monique and Jacques Roboh Department of Genetic Research and the Department of Genetic and Metabolic Diseases, Hadassah-Hebrew University Medical Center, Jerusalem, 91120, Israel
| | - Bruno Sainz
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER). Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain.,Enfermedades Crónicas y Cáncer Area, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, 28034, Spain
| | - Hayley Salvemini
- SA Pathology, Women and Children's Hospital Adelaide, Adelaide, 5006, Australia
| | - Mirthe H Schoots
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, 9700 RB, Groningen, The Netherlands
| | - Jan A Smeitink
- Radboud Center for Mitochondrial Medicine, Translational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands
| | - Maciej J Szukszto
- Medical Research Council, Mitochondrial Biology Unit, University of Cambridge, Cambridge, CB2 OXY, United Kingdom
| | - Hendrik J Ter Horst
- Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, 9700 RB, The Netherlands
| | - Frans van den Brandt
- Radboud Center for Mitochondrial Medicine, Translational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands
| | - Francjan J van Spronsen
- Division of Metabolic Diseases, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, 9700 RB, The Netherlands
| | - Joris A Veltman
- Department of Human Genetics, Radboud Institute for Molecular Life Sciences and Donders Centre for Neuroscience, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands.,Institute of Genetic Medicine, Newcastle University, Newcastle, NE1 3BZ, United Kingdom
| | - Eric Wartchow
- Department of Pathology, Children's Hospital Colorado, University of Colorado, Aurora, 80045, CO, USA
| | - Liesbeth T Wintjes
- Radboud Center for Mitochondrial Medicine, Translational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands
| | - Yaniv Zohar
- Institute of Pathology, Rambam Health Care Campus, 3109601, Haifa, Israel
| | - Miguel A Fernández-Moreno
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER). Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, 28041, Spain
| | - Hagit N Baris
- The Genetics Institute, Rambam Health Care Campus, Haifa, 3109601, Israel.,The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, 3109601, Israel
| | - Claudia Donnini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, 43124, Italy
| | - Michal Minczuk
- Medical Research Council, Mitochondrial Biology Unit, University of Cambridge, Cambridge, CB2 OXY, United Kingdom
| | - Richard J Rodenburg
- Radboud Center for Mitochondrial Medicine, Translational Metabolic Laboratory, Department of Pediatrics, Radboud University Medical Center, Nijmegen, 6500 HB, The Netherlands
| | - Johan L K Van Hove
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado, Aurora, 80045, CO, USA.
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5
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Zurita-Díaz F, Ortuño-Costela MDC, Moreno-Izquierdo A, Galbis L, Millán JM, Ayuso C, Garesse R, Gallardo ME. Establishment of a human iPSC line, IISHDOi004-A, from a patient with Usher syndrome associated with the mutation c.2276G>T; p.Cys759Phe in the USH2A gene. Stem Cell Res 2018; 31:152-156. [PMID: 30096711 DOI: 10.1016/j.scr.2018.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 07/16/2018] [Accepted: 08/01/2018] [Indexed: 12/31/2022] Open
Abstract
A human iPSC line, IISHDOi004-A, from fibroblasts obtained from a patient with Usher syndrome, harboring a homozygous mutation in the USH2A gene (c.2276G>T; p.Cys759Phe) has been generated. Reprogramming factors Oct3/4, Sox2, Klf4, and c-Myc were delivered using Sendai virus.
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Affiliation(s)
- Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - María Del Carmen Ortuño-Costela
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Ana Moreno-Izquierdo
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Servicio de Genética, Hospital 12 de Octubre, Madrid, Spain
| | - Liliana Galbis
- Departamento de Genética, Instituto de Investigación Sanitaria - Hospital Universitario Fundación Jiménez Díaz (IIS-FJD, UAM), Madrid, Spain
| | - José María Millán
- Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital La Fe, IIS-La Fe, Valencia, Spain
| | - Carmen Ayuso
- Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Departamento de Genética, Instituto de Investigación Sanitaria - Hospital Universitario Fundación Jiménez Díaz (IIS-FJD, UAM), Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain.
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6
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Zurita-Díaz F, Galera-Monge T, Moreno-Izquierdo A, Corton M, Ayuso C, Garesse R, Gallardo ME. Establishment of a human DOA 'plus' iPSC line, IISHDOi003-A, with the mutation in the OPA1 gene: c.1635C>A; p.Ser545Arg. Stem Cell Res 2017; 24:81-84. [PMID: 29034899 DOI: 10.1016/j.scr.2017.08.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 08/04/2017] [Accepted: 08/17/2017] [Indexed: 11/19/2022] Open
Abstract
We have generated a human iPSC line IISHDOi003-A from fibroblasts of a patient with a dominant optic atrophy 'plus' phenotype, harbouring a heterozygous mutation, c.1635C>A; p.Ser545Arg, in the OPA1 gene. Reprogramming factors Oct3/4, Sox2, Klf4, and c-Myc were delivered using Sendai virus.
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Affiliation(s)
- Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", UAM-CSIC, Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Teresa Galera-Monge
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", UAM-CSIC, Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Ana Moreno-Izquierdo
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Servicio de Genética, Hospital 12 de Octubre, Madrid, Spain
| | - Marta Corton
- Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Departamento de Genética, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital- Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
| | - Carmen Ayuso
- Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Departamento de Genética, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital- Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", UAM-CSIC, Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain.
| | - M Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", UAM-CSIC, Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain.
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7
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Ortuño-Costela MDC, Rodríguez-Mancera N, García-López M, Zurita-Díaz F, Moreno-Izquierdo A, Lucía A, Martín MÁ, Garesse R, Gallardo ME. Establishment of a human iPSC line (IISHDOi001-A) from a patient with McArdle disease. Stem Cell Res 2017; 23:188-192. [PMID: 28925366 DOI: 10.1016/j.scr.2017.07.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 07/20/2017] [Indexed: 11/28/2022] Open
Abstract
Human iPSC line IISHDOi001-A was generated from fibroblasts of a patient with McArdle disease harbouring the mutation, c.148C>T; p.Arg50Ter, in the PYGM gene. Reprogramming factors Oct3/4, Sox2, Klf4, and c-Myc were delivered using Sendai virus.
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Affiliation(s)
- María Del Carmen Ortuño-Costela
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | | | - Marta García-López
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
| | - Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Ana Moreno-Izquierdo
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Servicio de Genética, Hospital 12 de Octubre, Madrid, Spain
| | - Alejandro Lucía
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain; Universidad Europea de Madrid, Spain
| | - Miguel Ángel Martín
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain.
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8
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Fernández-Moreno M, Soto-Hermida A, Vázquez-Mosquera ME, Cortés-Pereira E, Relaño S, Hermida-Gómez T, Pértega S, Oreiro-Villar N, Fernández-López C, Garesse R, Blanco FJ, Rego-Pérez I. Mitochondrial DNA haplogroups influence the risk of incident knee osteoarthritis in OAI and CHECK cohorts. A meta-analysis and functional study. Ann Rheum Dis 2016; 76:1114-1122. [DOI: 10.1136/annrheumdis-2016-210131] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 09/22/2016] [Accepted: 11/05/2016] [Indexed: 11/03/2022]
Abstract
ObjectiveTo evaluate the influence of the mitochondrial DNA (mtDNA) haplogroups in the risk of incident knee osteoarthritis (OA) and to explain the functional consequences of this association to identify potential diagnostic biomarkers and therapeutic targets.MethodsTwo prospective cohorts contributed participants. The osteoarthritis initiative (OAI) included 2579 subjects of the incidence subcohort, and the cohort hip and cohort knee (CHECK) included 635, both with 8-year follow-up. The analysis included the association of mtDNA haplogroups with the rate of incident knee OA in subjects from both cohorts followed by a subsequent meta-analysis. Transmitochondrial cybrids harbouring haplogroup J or H were constructed to detect differences between them in relation to physiological features including specific mitochondrial metabolic parameters, reactive oxygen species production, oxidative stress and apoptosis.ResultsCompared with H, the haplogroup J associates with decreased risk of incident knee OA in subjects from OAI (HR=0.680; 95% CI 0.470 to 0.968; p<0.05) and CHECK (HR=0.728; 95% CI 0.469 to 0.998; p<0.05). The subsequent meta-analysis including 3214 cases showed that the haplogroup J associates with a lower risk of incident knee OA (HR=0.702; 95% CI 0.541 to 0.912; p=0.008). J cybrids show a lower free radical production, higher cell survival under oxidative stress conditions, lower grade of apoptosis as well as lower expression of the mitochondrially related pro-apoptotic gene BCL2 binding component 3 (BBC3). In addition, J cybrids also show a lower mitochondrial respiration and glycolysis leading to decreased ATP production.ConclusionsThe physiological effects of the haplogroup J are beneficial to have a lower rate of incident knee OA over time. Potential drugs to treat OA could focus on emulating the mitochondrial behaviour of this haplogroup.
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9
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Neira JL, Martínez-Rodríguez S, Hernández-Cifre JG, Cámara-Artigas A, Clemente P, Peralta S, Fernández-Moreno MÁ, Garesse R, García de la Torre J, Rizzuti B. Human COA3 Is an Oligomeric Highly Flexible Protein in Solution. Biochemistry 2016; 55:6209-6220. [PMID: 27791355 DOI: 10.1021/acs.biochem.6b00644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The assembly of the protein complex of cytochrome c oxidase (COX), which participates in the mitochondrial respiratory chain, requires a large number of accessory proteins (the so-called assembly factors). Human COX assembly factor 3 (hCOA3), also known as MITRAC12 or coiled-coil domain-containing protein 56 (CCDC56), interacts with the first subunit protein of COX to form its catalytic core and promotes its assemblage with the other units. Therefore, hCOA3 is involved in COX biogenesis in humans and can be exploited as a drug target in patients with mitochondrial dysfunctions. However, to be considered a molecular target, its structure and conformational stability must first be elucidated. We have embarked on the description of such features by using spectroscopic and hydrodynamic techniques, in aqueous solution and in the presence of detergents, together with computational methods. Our results show that hCOA3 is an oligomeric protein, forming aggregates of different molecular masses in aqueous solution. Moreover, on the basis of fluorescence and circular dichroism results, the protein has (i) its unique tryptophan partially shielded from solvent and (ii) a relatively high percentage of secondary structure. However, this structure is highly flexible and does not involve hydrogen bonding. Experiments in the presence of detergents suggest a slightly higher content of nonrigid helical structure. Theoretical results, based on studies of the primary structure of the protein, further support the idea that hCOA3 is a disordered protein. We suggest that the flexibility of hCOA3 is crucial for its interaction with other proteins to favor mitochondrial protein translocation and assembly of proteins involved in the respiratory chain.
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Affiliation(s)
- José L Neira
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández , Elche, Alicante, Spain.,Biocomputation and Complex Systems Physics Institute , Zaragoza, Spain
| | | | | | - Ana Cámara-Artigas
- Department of Chemistry and Physics, University of Almería , Agrifood Campus of International Excellence (ceiA3), Almería, Spain
| | - Paula Clemente
- Departamento de Bioquímica-Instituto de Investigaciones Biomédicas "Alberto Sols", Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER) , Madrid, Spain.,Instituto de Investigación Sanitaria, Hospital 12 de Octubre (i+12) , Madrid, Spain
| | - Susana Peralta
- Departamento de Bioquímica-Instituto de Investigaciones Biomédicas "Alberto Sols", Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER) , Madrid, Spain.,Instituto de Investigación Sanitaria, Hospital 12 de Octubre (i+12) , Madrid, Spain
| | - Miguel Ángel Fernández-Moreno
- Departamento de Bioquímica-Instituto de Investigaciones Biomédicas "Alberto Sols", Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER) , Madrid, Spain.,Instituto de Investigación Sanitaria, Hospital 12 de Octubre (i+12) , Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica-Instituto de Investigaciones Biomédicas "Alberto Sols", Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER) , Madrid, Spain.,Instituto de Investigación Sanitaria, Hospital 12 de Octubre (i+12) , Madrid, Spain
| | | | - Bruno Rizzuti
- CNR-NANOTEC, Licryl-UOS Cosenza and CEMIF.Cal, Department of Physics, University of Calabria , 87036 Rende, Italy
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10
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Rego-Pérez I, Fernández-Moreno M, Soto-Hermida A, Vázquez-Mosquera M, Cortés-Pereira E, Relaño S, Hermida-Gόmez T, Pértega S, Oreiro N, Fernández-Lόpez C, Garesse R, Blanco F. SAT0005 A Meta-Analysis and A Functional Study with Transmitochondrial Cybrids Confirm The Role of The Mtdna Haplogroups in The Development of Incident Knee Osteoarthritis. Data from Check and Oai. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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11
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Dal-Ré R, Bernad A, Garesse R. La reproducibilidad de las investigaciones biomédicas: Quo vadis? Med Clin (Barc) 2016; 146:408-12. [DOI: 10.1016/j.medcli.2015.11.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 11/13/2015] [Accepted: 11/23/2015] [Indexed: 11/16/2022]
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12
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Galera-Monge T, Zurita-Díaz F, González-Páramos C, Moreno-Izquierdo A, Fraga MF, Fernández AF, Garesse R, Gallardo ME. Generation of a human iPSC line from a patient with Leigh syndrome caused by a mutation in the MT-ATP6 gene. Stem Cell Res 2016; 16:766-9. [PMID: 27346203 DOI: 10.1016/j.scr.2016.04.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 04/13/2016] [Indexed: 10/21/2022] Open
Affiliation(s)
- Teresa Galera-Monge
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Cristina González-Páramos
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Ana Moreno-Izquierdo
- Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain; Servicio de Genética, Hospital 12 de Octubre, Madrid, Spain
| | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Spain
| | - Agustin F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols", (UAM-CSIC) Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain.
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13
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Galera-Monge T, Zurita-Díaz F, Moreno-Izquierdo A, Fraga MF, Fernández AF, Ayuso C, Garesse R, Gallardo ME. Generation of a human iPSC line from a patient with an optic atrophy 'plus' phenotype due to a mutation in the OPA1 gene. Stem Cell Res 2016; 16:673-6. [PMID: 27346197 DOI: 10.1016/j.scr.2016.03.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 03/25/2016] [Indexed: 10/21/2022] Open
Abstract
Human iPSC line Oex2054SV.4 was generated from fibroblasts of a patient with an optic atrophy 'plus' phenotype associated with a heterozygous mutation in the OPA1 gene. Reprogramming factors OCT3/4, SOX2, CMYC and KLF4 were delivered using a non-integrative methodology that involves the use of Sendai virus.
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Affiliation(s)
- Teresa Galera-Monge
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain
| | - Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain
| | - Ana Moreno-Izquierdo
- Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain; Servicio de Genética, Hospital 12 de Octubre, Madrid, Spain
| | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Spain
| | - Agustin F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - C Ayuso
- Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Department of Genetics, Instituto de Investigación Sanitaria-University Hospital Fundacion Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Spain; Instituto de Investigaciones Biomédicas "Alberto Sols" (UAM-CSIC), Madrid, Spain; Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain.
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14
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Galera T, Zurita-Díaz F, Garesse R, Gallardo ME. iPSCs, a Future Tool for Therapeutic Intervention in Mitochondrial Disorders: Pros and Cons. J Cell Physiol 2016; 231:2317-8. [PMID: 27018482 DOI: 10.1002/jcp.25386] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 03/23/2016] [Indexed: 01/19/2023]
Abstract
Mitochondrial disorders, although individually are rare, taken together constitute a big group of diseases that share a defect in the oxidative phosphorylation system. Up to now, the development of therapies for these diseases is very slow and ineffective due in part to the lack of appropriate disease models. Therefore, there is an urgent need for the discovery of new therapeutic interventions. Regarding this, the generation of induced pluripotent stem cells (iPSCs) has opened new expectations in the regenerative medicine field. However, special cares and considerations must be taken into account previous to a replacement therapy. J. Cell. Physiol. 231: 2317-2318, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Teresa Galera
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Francisco Zurita-Díaz
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
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15
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Cruz-Bermúdez A, Vicente-Blanco RJ, Hernández-Sierra R, Montero M, Alvarez J, González Manrique M, Blázquez A, Martín MA, Ayuso C, Garesse R, Fernández-Moreno MA. Functional Characterization of Three Concomitant MtDNA LHON Mutations Shows No Synergistic Effect on Mitochondrial Activity. PLoS One 2016; 11:e0146816. [PMID: 26784702 PMCID: PMC4718627 DOI: 10.1371/journal.pone.0146816] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 12/22/2015] [Indexed: 12/24/2022] Open
Abstract
The presence of more than one non-severe pathogenic mutation in the same mitochondrial DNA (mtDNA) molecule is very rare. Moreover, it is unclear whether their co-occurrence results in an additive impact on mitochondrial function relative to single mutation effects. Here we describe the first example of a mtDNA molecule harboring three Leber's hereditary optic neuropathy (LHON)-associated mutations (m.11778G>A, m.14484T>C, m.11253T>C) and the analysis of its genetic, biochemical and molecular characterization in transmitochondrial cells (cybrids). Extensive characterization of cybrid cell lines harboring either the 3 mutations or the single classic m.11778G>A and m.14484T>C mutations revealed no differences in mitochondrial function, demonstrating the absence of a synergistic effect in this model system. These molecular results are in agreement with the ophthalmological characteristics found in the triple mutant patient, which were similar to those carrying single mtDNA LHON mutations.
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Affiliation(s)
- Alberto Cruz-Bermúdez
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
| | - Ramiro J. Vicente-Blanco
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
| | - Rosana Hernández-Sierra
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
| | - Mayte Montero
- Departamento de Bioquímica, Biología Molecular y Fisiología, Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain
| | - Javier Alvarez
- Departamento de Bioquímica, Biología Molecular y Fisiología, Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain
| | | | - Alberto Blázquez
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
| | - Miguel Angel Martín
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
| | - Carmen Ayuso
- Department of Genetics, IIS-Fundacion Jimenez Diaz University Hospital (IIS-FJD, UAM), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
- * E-mail: (RG); (MAF-M)
| | - Miguel A. Fernández-Moreno
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” UAM-CSIC and Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain, and Centro de Investigacion Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain
- * E-mail: (RG); (MAF-M)
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16
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Zurita-Díaz F, Galera-Monge T, Moreno-Izquierdo A, Fraga MF, Ayuso C, Fernández AF, Garesse R, Gallardo ME. Generation of a human iPSC line from a patient with a mitochondrial encephalopathy due to mutations in the GFM1 gene. Stem Cell Res 2015; 16:124-7. [PMID: 27345796 DOI: 10.1016/j.scr.2015.12.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 11/26/2022] Open
Abstract
Human iPSC line GFM1SV.25 was generated from fibroblasts of a child with a severe mitochondrial encephalopathy associated with mutations in the GFM1 gene, encoding the mitochondrial translation elongation factor G1. Reprogramming factors OCT3/4, SOX2, CMYC and KLF4 were delivered using a non integrative methodology that involves the use of Sendai virus.
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Affiliation(s)
- Francisco Zurita-Díaz
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Teresa Galera-Monge
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Ana Moreno-Izquierdo
- Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain; Servicio de Genética, Hospital 12 de Octubre, Madrid, Spain
| | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Spain
| | - C Ayuso
- Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Department of Genetics, Instituto de Investigación Sanitaria-University Hospital Fundacion Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Agustin F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain.
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17
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Zurita F, Galera T, González-Páramos C, Moreno-Izquierdo A, Schneiderat P, Fraga MF, Fernández AF, Garesse R, Gallardo ME. Generation of a human iPSC line from a patient with a defect of intergenomic communication. Stem Cell Res 2015; 16:120-3. [PMID: 27345795 DOI: 10.1016/j.scr.2015.12.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 12/23/2015] [Indexed: 11/16/2022] Open
Abstract
Human iPSC line PG64SV.2 was generated from fibroblasts of a patient with a defect of intergenomic communication. This patient harbored a homozygous mutation (c.2243G>C; p.Trp748Ser) in the gene encoding the catalytic subunit of the mitochondrial DNA polymerase gamma gene (POLG). Reprogramming factors Oct3/4, Sox2, Klf4, and cMyc were delivered using a non integrative methodology that involves the use of Sendai virus.
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Affiliation(s)
- Francisco Zurita
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Teresa Galera
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Cristina González-Páramos
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Ana Moreno-Izquierdo
- Servicio de Genética, Hospital 12 de Octubre, Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - Peter Schneiderat
- Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Spain
| | - Agustin F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols ", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i + 12"), Madrid, Spain.
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18
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Galera T, Zurita F, González-Páramos C, Moreno-Izquierdo A, Fraga MF, Fernández AF, Garesse R, Gallardo ME. Generation of a human iPSC line from a patient with Leigh syndrome. Stem Cell Res 2015; 16:63-6. [PMID: 27345786 DOI: 10.1016/j.scr.2015.12.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 12/09/2015] [Accepted: 12/09/2015] [Indexed: 11/28/2022] Open
Abstract
Human iPSC line LND554SV.3 was generated from heteroplasmic fibroblasts of a patient with Leigh syndrome carrying a mutation in the MT-ND5 gene (m.13513GNA; p.D393N). Reprogramming factors Oct3/4, Sox2, Klf4,and cMyc were delivered using a non-integrative methodology that involves the use of Sendai virus.
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Affiliation(s)
- Teresa Galera
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain
| | - Francisco Zurita
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain
| | - Cristina González-Páramos
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain
| | | | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Spain
| | - Agustin F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain
| | - M Esther Gallardo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols", Facultad de Medicina (UAM-CSIC), Spain; Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Madrid, Spain; Instituto de Investigación Hospital 12 de Octubre ("i+12"), Madrid, Spain.
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19
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Fernández-Moreno M, Hermida-Gόmez T, Soto-Hermida A, Fernández-Tajes J, Vázquez-Mosquera M, Cortés-Pereira E, Relaño-Fernández S, Oreiro-Villar N, Fernández-Lόpez C, Gallardo-Pérez E, Garesse R, Rego-Pérez I, Blanco F. THU0017 In Vitro Studies Using Cybrids Show that Mtdna Haplogroup J and H have Different Mitochondrial Activity. A Possible Explanation to OA Pathogenesis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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20
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Martínez-Morentin L, Martínez L, Piloto S, Yang H, Schon EA, Garesse R, Bodmer R, Ocorr K, Cervera M, Arredondo JJ. Cardiac deficiency of single cytochrome oxidase assembly factor scox induces p53-dependent apoptosis in a Drosophila cardiomyopathy model. Hum Mol Genet 2015; 24:3608-22. [PMID: 25792727 DOI: 10.1093/hmg/ddv106] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 03/17/2015] [Indexed: 12/18/2022] Open
Abstract
The heart is a muscle with high energy demands. Hence, most patients with mitochondrial disease produced by defects in the oxidative phosphorylation (OXPHOS) system are susceptible to cardiac involvement. The presentation of mitochondrial cardiomyopathy includes hypertrophic, dilated and left ventricular noncompaction, but the molecular mechanisms involved in cardiac impairment are unknown. One of the most frequent OXPHOS defects in humans frequently associated with cardiomyopathy is cytochrome c oxidase (COX) deficiency caused by mutations in COX assembly factors such as Sco1 and Sco2. To investigate the molecular mechanisms that underlie the cardiomyopathy associated with Sco deficiency, we have heart specifically interfered scox expression, the single Drosophila Sco orthologue. Cardiac-specific knockdown of scox reduces fly lifespan, and it severely compromises heart function and structure, producing dilated cardiomyopathy. Cardiomyocytes with low levels of scox have a significant reduction in COX activity and they undergo a metabolic switch from OXPHOS to glycolysis, mimicking the clinical features found in patients harbouring Sco mutations. The major cardiac defects observed are produced by a significant increase in apoptosis, which is dp53-dependent. Genetic and molecular evidence strongly suggest that dp53 is directly involved in the development of the cardiomyopathy induced by scox deficiency. Remarkably, apoptosis is enhanced in the muscle and liver of Sco2 knock-out mice, clearly suggesting that cell death is a key feature of the COX deficiencies produced by mutations in Sco genes in humans.
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Affiliation(s)
- Leticia Martínez-Morentin
- Departamento de Bioquímica, Facultad de Medicina, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), c/ Arzobispo Morcillo s/n,Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Lidia Martínez
- Departamento de Bioquímica, Facultad de Medicina, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), c/ Arzobispo Morcillo s/n,Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Sarah Piloto
- Development, Aging and Regeneration Program, Sanford-Burnham Medical Research Institute, 10901 N Torrey Pine Rd, San Diego, CA 92037, USA
| | - Hua Yang
- Department of Neurology and Department of Genetics and Development, College of Physicians and Surgeons, Columbia University, 630 West 168th Street P&S 4-449, New York, NY, USA and
| | - Eric A Schon
- Department of Neurology and Department of Genetics and Development, College of Physicians and Surgeons, Columbia University, 630 West 168th Street P&S 4-449, New York, NY, USA and
| | - Rafael Garesse
- Departamento de Bioquímica, Facultad de Medicina, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), c/ Arzobispo Morcillo s/n,Universidad Autónoma de Madrid, Madrid 28029, Spain, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid 28041, Spain
| | - Rolf Bodmer
- Development, Aging and Regeneration Program, Sanford-Burnham Medical Research Institute, 10901 N Torrey Pine Rd, San Diego, CA 92037, USA
| | - Karen Ocorr
- Development, Aging and Regeneration Program, Sanford-Burnham Medical Research Institute, 10901 N Torrey Pine Rd, San Diego, CA 92037, USA,
| | - Margarita Cervera
- Departamento de Bioquímica, Facultad de Medicina, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), c/ Arzobispo Morcillo s/n,Universidad Autónoma de Madrid, Madrid 28029, Spain, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid 28041, Spain
| | - Juan J Arredondo
- Departamento de Bioquímica, Facultad de Medicina, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), c/ Arzobispo Morcillo s/n,Universidad Autónoma de Madrid, Madrid 28029, Spain, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid 28041, Spain
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21
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Zabalza R, Nurminen A, Kaguni LS, Garesse R, Gallardo ME, Bornstein B. Co-occurrence of four nucleotide changes associated with an adult mitochondrial ataxia phenotype. BMC Res Notes 2014; 7:883. [PMID: 25488682 PMCID: PMC4295309 DOI: 10.1186/1756-0500-7-883] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 11/18/2014] [Indexed: 11/19/2022] Open
Abstract
Background Mitochondrial DNA maintenance disorders are an important cause of hereditary ataxia syndrome, and the majority are associated with mutations in the gene encoding the catalytic subunit of the mitochondrial DNA polymerase (DNA polymerase gamma), POLG. Mutations resulting in the amino acid substitutions A467T and W748S are the most common genetic causes of inherited cerebellar ataxia in Europe. Methods We report here a POLG mutational screening in a family with a mitochondrial ataxia phenotype. To evaluate the likely pathogenicity of each of the identified changes, a 3D structural analysis of the PolG protein was carried out, using the Alpers mutation clustering tool reported previously. Results Three novel nucleotide changes and the p.Q1236H polymorphism have been identified in the affected members of the pedigree. Computational analysis suggests that the p.K601E mutation is likely the major contributing factor to the pathogenic phenotype. Conclusions Computational analysis of the PolG protein suggests that the p.K601E mutation is likely the most significant contributing factor to a pathogenic phenotype. However, the co-occurrence of multiple POLG alleles may be necessary in the development an adult-onset mitochondrial ataxia phenotype.
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Affiliation(s)
| | | | | | | | - M Esther Gallardo
- Departamento de Bioquímica, Facultad de Medicina, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), Madrid, Spain.
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22
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Zambrano A, García-Carpizo V, Gallardo ME, Villamuera R, Gómez-Ferrería MA, Pascual A, Buisine N, Sachs LM, Garesse R, Aranda A. The thyroid hormone receptor β induces DNA damage and premature senescence. ACTA ACUST UNITED AC 2014; 204:129-46. [PMID: 24395638 PMCID: PMC3882795 DOI: 10.1083/jcb.201305084] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
There is increasing evidence that the thyroid hormone (TH) receptors (THRs) can play a role in aging, cancer and degenerative diseases. In this paper, we demonstrate that binding of TH T3 (triiodothyronine) to THRB induces senescence and deoxyribonucleic acid (DNA) damage in cultured cells and in tissues of young hyperthyroid mice. T3 induces a rapid activation of ATM (ataxia telangiectasia mutated)/PRKAA (adenosine monophosphate-activated protein kinase) signal transduction and recruitment of the NRF1 (nuclear respiratory factor 1) and THRB to the promoters of genes with a key role on mitochondrial respiration. Increased respiration leads to production of mitochondrial reactive oxygen species, which in turn causes oxidative stress and DNA double-strand breaks and triggers a DNA damage response that ultimately leads to premature senescence of susceptible cells. Our findings provide a mechanism for integrating metabolic effects of THs with the tumor suppressor activity of THRB, the effect of thyroidal status on longevity, and the occurrence of tissue damage in hyperthyroidism.
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Affiliation(s)
- Alberto Zambrano
- Instituto de Investigaciones Biomédicas "Alberto Sols", Consejo Superior de Investigaciones Científicas and Universidad Autónoma de Madrid, 28029 Madrid, Spain
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23
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Garcia-Pavia P, Vázquez ME, Segovia J, Salas C, Avellana P, Gómez-Bueno M, Vilches C, Gallardo ME, Garesse R, Molano J, Bornstein B, Alonso-Pulpon L. Genetic basis of end-stage hypertrophic cardiomyopathy. Eur J Heart Fail 2014; 13:1193-201. [DOI: 10.1093/eurjhf/hfr110] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Pablo Garcia-Pavia
- Cardiomyopathy Unit, Heart Transplant Program, Department of Cardiology; Hospital Universitario Puerta de Hierro; Madrid Spain
- Red temática de Investigación en Insuficiencia Cardiaca, REDINSCOR; Madrid Spain
| | - Maria E. Vázquez
- Department of Biochemistry; Hospital Universitario Puerta de Hierro; Madrid Spain
| | - Javier Segovia
- Cardiomyopathy Unit, Heart Transplant Program, Department of Cardiology; Hospital Universitario Puerta de Hierro; Madrid Spain
- Red temática de Investigación en Insuficiencia Cardiaca, REDINSCOR; Madrid Spain
| | - Clara Salas
- Department of Pathology; Hospital Universitario Puerta de Hierro; Madrid Spain
| | - Patricia Avellana
- Cardiomyopathy Unit, Heart Transplant Program, Department of Cardiology; Hospital Universitario Puerta de Hierro; Madrid Spain
| | - Manuel Gómez-Bueno
- Cardiomyopathy Unit, Heart Transplant Program, Department of Cardiology; Hospital Universitario Puerta de Hierro; Madrid Spain
- Red temática de Investigación en Insuficiencia Cardiaca, REDINSCOR; Madrid Spain
| | - Carlos Vilches
- Department of Immunology; Hospital Universitario Puerta de Hierro; Madrid Spain
| | - M. Esther Gallardo
- Department of Biochemistry and Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, Instituto de Investigaciones Biomédicas ‘Alberto Sols’ CSIC-UAM, Medical School; Universidad Autónoma de Madrid; Spain
| | - Rafael Garesse
- Department of Biochemistry and Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, Instituto de Investigaciones Biomédicas ‘Alberto Sols’ CSIC-UAM, Medical School; Universidad Autónoma de Madrid; Spain
| | - Jesús Molano
- Department of Biochemistry; Hospital Universitario La Paz; Madrid Spain
| | - Belén Bornstein
- Department of Biochemistry; Hospital Universitario Puerta de Hierro; Madrid Spain
- Department of Biochemistry and Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, Instituto de Investigaciones Biomédicas ‘Alberto Sols’ CSIC-UAM, Medical School; Universidad Autónoma de Madrid; Spain
| | - Luis Alonso-Pulpon
- Cardiomyopathy Unit, Heart Transplant Program, Department of Cardiology; Hospital Universitario Puerta de Hierro; Madrid Spain
- Red temática de Investigación en Insuficiencia Cardiaca, REDINSCOR; Madrid Spain
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24
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González-Vioque E, Bornstein B, Gallardo ME, Fernández-Moreno MÁ, Garesse R. The pathogenicity scoring system for mitochondrial tRNA mutations revisited. Mol Genet Genomic Med 2013; 2:107-14. [PMID: 24689073 PMCID: PMC3960052 DOI: 10.1002/mgg3.47] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Revised: 09/27/2013] [Accepted: 10/09/2013] [Indexed: 11/14/2022] Open
Abstract
Confirming the pathogenicity of mitochondrial tRNA point mutations is one of the classical challenges in the field of mitochondrial medicine. In addition to genetic and functional studies, the evaluation of a genetic change using a pathogenicity scoring system is extremely useful to discriminate between disease-causing mutations from neutral polymorphisms. The pathogenicity scoring system is very robust for confirming pathogenicity, especially of mutations that show impaired activity in functional studies. However, mutations giving normal results using the same functional approaches are disregarded, and this compromises the power of the system to rule out pathogenicity. We propose to include a new criterion in the pathogenicity scoring systems regarding mutations which fail to show any mitochondrial defect in functional studies. To evaluate this proposal we characterized two mutations, m.8296A>G and m.8347A>G, in the mitochondrial tRNALys gene (MT-TK) using trans-mitochondrial cybrid analysis. m.8347A>G mutation severely impairs oxidative phosphorylation, suggesting that it is highly pathogenic. By contrast, the behavior of cybrids homoplasmic for the m.8296A>G mutation is similar to cybrids containing wild-type mitochondrial DNA (mtDNA). The results indicate that including not only positive but also negative outcomes of functional studies in the scoring system is critical for facilitating the diagnosis of this complex group of diseases.
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Affiliation(s)
- Emiliano González-Vioque
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Universidad Autónoma de Madrid 28029, Madrid, Spain ; Laboratorio de Enfermedades Mitocondriales, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12) Madrid, Spain
| | - Belén Bornstein
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Universidad Autónoma de Madrid 28029, Madrid, Spain ; Servicio de Bioquímica, Instituto de Investigación Sanitaria Puerta de Hierro Majadahonda Madrid, Spain
| | - María Esther Gallardo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Universidad Autónoma de Madrid 28029, Madrid, Spain ; Laboratorio de Enfermedades Mitocondriales, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12) Madrid, Spain
| | - Miguel Ángel Fernández-Moreno
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Universidad Autónoma de Madrid 28029, Madrid, Spain ; Laboratorio de Enfermedades Mitocondriales, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12) Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Universidad Autónoma de Madrid 28029, Madrid, Spain ; Laboratorio de Enfermedades Mitocondriales, Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12) Madrid, Spain
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25
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Fernández-Moreno MA, Hernández R, Adán C, Roberti M, Bruni F, Polosa PL, Cantatore P, Matsushima Y, Kaguni LS, Garesse R. Drosophila nuclear factor DREF regulates the expression of the mitochondrial DNA helicase and mitochondrial transcription factor B2 but not the mitochondrial translation factor B1. Biochim Biophys Acta 2013; 1829:1136-46. [PMID: 23916463 DOI: 10.1016/j.bbagrm.2013.07.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Revised: 07/16/2013] [Accepted: 07/19/2013] [Indexed: 11/29/2022]
Abstract
DREF [DRE (DNA replication-related element)-binding factor] controls the transcription of numerous genes in Drosophila, many involved in nuclear DNA (nDNA) replication and cell proliferation, three in mitochondrial DNA (mtDNA) replication and two in mtDNA transcription termination. In this work, we have analysed the involvement of DREF in the expression of the known remaining genes engaged in the minimal mtDNA replication (d-mtDNA helicase) and transcription (the activator d-mtTFB2) machineries and of a gene involved in mitochondrial mRNA translation (d-mtTFB1). We have identified their transcriptional initiation sites and DRE sequences in their promoter regions. Gel-shift and chromatin immunoprecipitation assays demonstrate that DREF interacts in vitro and in vivo with the d-mtDNA helicase and d-mtTFB2, but not with the d-mtTFB1 promoters. Transient transfection assays in Drosophila S2 cells with mutated DRE motifs and truncated promoter regions show that DREF controls the transcription of d-mtDNA helicase and d-mtTFB2, but not that of d-mtTFB1. RNA interference of DREF in S2 cells reinforces these results showing a decrease in the mRNA levels of d-mtDNA helicase and d-mtTFB2 and no changes in those of the d-mtTFB1. These results link the genetic regulation of nuclear DNA replication with the genetic control of mtDNA replication and transcriptional activation in Drosophila.
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Affiliation(s)
- Miguel A Fernández-Moreno
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC and Centro de Investigación Biomédica en Red (CIBERER), Facultad de Medicina, Universidad Autónoma de Madrid, Spain, c/ Arzobispo Morcillo 4, 28029 Madrid, Spain; Instituto de Investigación Sanitaria Hospital Universitario 12 de Octubre (i+12), Madrid, Spain.
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26
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Martínez-Azorín F, Calleja M, Hernández-Sierra R, Farr CL, Kaguni LS, Garesse R. Muscle-specific overexpression of the catalytic subunit of DNA polymerase γ induces pupal lethality in Drosophila melanogaster. Arch Insect Biochem Physiol 2013; 83:127-137. [PMID: 23729397 PMCID: PMC4703106 DOI: 10.1002/arch.21101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We show the physiological effects and molecular characterization of overexpression of the catalytic core of mitochondrial DNA (mtDNA) polymerase (pol γ-α) in muscle of Drosophila melanogaster. Muscle-specific overexpression of pol γ-α using the UAS/GAL4 (where UAS is upstream activation sequence) system produced more than 90% of lethality at the end of pupal stage at 25°C, and the survivor adult flies showed a significant reduction in life span. The survivor flies displayed a decreased mtDNA level that is accompanied by a corresponding decrease in the levels of the nucleoid-binding protein mitochondrial transcription factor A (mtTFA). Furthermore, an increase in apoptosis is detected in larvae and adults overexpressing pol γ-α. We suggest that the pupal lethality and reduced life span of survivor adult flies are both caused mainly by massive apoptosis of muscle cells induced by mtDNA depletion.
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Affiliation(s)
- Francisco Martínez-Azorín
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Facultad de Medicina CIBERER ISCIII, Universidad Autónoma de Madrid, Madrid, Spain.
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27
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Clemente P, Peralta S, Cruz-Bermudez A, Echevarría L, Fontanesi F, Barrientos A, Fernandez-Moreno MA, Garesse R. hCOA3 stabilizes cytochrome c oxidase 1 (COX1) and promotes cytochrome c oxidase assembly in human mitochondria. J Biol Chem 2013; 288:8321-8331. [PMID: 23362268 DOI: 10.1074/jbc.m112.422220] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cytochrome c oxidase (COX) or complex IV of the mitochondrial respiratory chain plays a fundamental role in energy production of aerobic cells. In humans, COX deficiency is the most frequent cause of mitochondrial encephalomyopathies. Human COX is composed of 13 subunits of dual genetic origin, whose assembly requires an increasing number of nuclear-encoded accessory proteins known as assembly factors. Here, we have identified and characterized human CCDC56, an 11.7-kDa mitochondrial transmembrane protein, as a new factor essential for COX biogenesis. CCDC56 shares sequence similarity with the yeast COX assembly factor Coa3 and was termed hCOA3. hCOA3-silenced cells display a severe COX functional alteration owing to a decreased stability of newly synthesized COX1 and an impairment in the holoenzyme assembly process. We show that hCOA3 physically interacts with both the mitochondrial translation machinery and COX structural subunits. We conclude that hCOA3 stabilizes COX1 co-translationally and promotes its assembly with COX partner subunits. Finally, our results identify hCOA3 as a new candidate when screening for genes responsible for mitochondrial diseases associated with COX deficiency.
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Affiliation(s)
- Paula Clemente
- Departamento de Bioquímica, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras, 28029 Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), 28029 Madrid, Spain
| | - Susana Peralta
- Departamento de Bioquímica, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras, 28029 Madrid, Spain
| | - Alberto Cruz-Bermudez
- Departamento de Bioquímica, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras, 28029 Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), 28029 Madrid, Spain
| | - Lucía Echevarría
- Departamento de Bioquímica, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras, 28029 Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), 28029 Madrid, Spain
| | - Flavia Fontanesi
- Department of Neurology, University of Miami, Miller School of Medicine, Miami, Florida 33136
| | - Antoni Barrientos
- Department of Neurology, University of Miami, Miller School of Medicine, Miami, Florida 33136; Department of Biochemistry, University of Miami, Miller School of Medicine, Miami, Florida 33136
| | - Miguel A Fernandez-Moreno
- Departamento de Bioquímica, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras, 28029 Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), 28029 Madrid, Spain; MITOLAB Consortium P2010/BMD-2402, Comunidad de Madrid, 28029 Madrid, Spain
| | - Rafael Garesse
- Departamento de Bioquímica, Universidad Autónoma de Madrid, Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras, 28029 Madrid, Spain; Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), 28029 Madrid, Spain; MITOLAB Consortium P2010/BMD-2402, Comunidad de Madrid, 28029 Madrid, Spain.
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Villar P, Bretón B, García-Pavía P, González-Páramos C, Blázquez A, Gómez-Bueno M, García-Silva T, García-Consuegra I, Martín MA, Garesse R, Bornstein B, Gallardo ME. Cardiac Dysfunction in Mitochondrial Disease. Circ J 2013; 77:2799-806. [DOI: 10.1253/circj.cj-13-0557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pedro Villar
- Biochemistry Unit, “Hospital Universitario Puerta de Hierro”
- Research Institute “Puerta de Hierro” Majadahonda (IDIPHIM)
| | - Begoña Bretón
- Biochemistry Unit, “Hospital Universitario Puerta de Hierro”
- Research Institute “Puerta de Hierro” Majadahonda (IDIPHIM)
| | - Pablo García-Pavía
- Cardiology Unit, “Hospital Universitario Puerta de Hierro”
- Net of Clinical and Basic Research in Heart Failure (REDINSCOR)
- Research Institute “Puerta de Hierro” Majadahonda (IDIPHIM)
| | | | - Alberto Blázquez
- Rare Diseases Biomedical Research Centre (CIBERER)
- Health Research Institute “Hospital 12 de Octubre (i+12)”
- Laboratory of Mitochondrial Diseases, Research Centre
| | - Manuel Gómez-Bueno
- Cardiology Unit, “Hospital Universitario Puerta de Hierro”
- Net of Clinical and Basic Research in Heart Failure (REDINSCOR)
- Research Institute “Puerta de Hierro” Majadahonda (IDIPHIM)
| | - Teresa García-Silva
- Health Research Institute “Hospital 12 de Octubre (i+12)”
- Pediatrics Unit, “Hospital Universitario 12 de Octubre”
| | - Ines García-Consuegra
- Health Research Institute “Hospital 12 de Octubre (i+12)”
- Laboratory of Mitochondrial Diseases, Research Centre
| | - Miguel Angel Martín
- Rare Diseases Biomedical Research Centre (CIBERER)
- Health Research Institute “Hospital 12 de Octubre (i+12)”
- Laboratory of Mitochondrial Diseases, Research Centre
| | - Rafael Garesse
- Biochemistry Departament, Biomedical Research Institute “Alberto Sols”, Medicine College, UAM-CSIC
- Rare Diseases Biomedical Research Centre (CIBERER)
- Health Research Institute “Hospital 12 de Octubre (i+12)”
| | - Belen Bornstein
- Biochemistry Departament, Biomedical Research Institute “Alberto Sols”, Medicine College, UAM-CSIC
- Rare Diseases Biomedical Research Centre (CIBERER)
- Health Research Institute “Hospital 12 de Octubre (i+12)”
- Biochemistry Unit, “Hospital Universitario Puerta de Hierro”
- Research Institute “Puerta de Hierro” Majadahonda (IDIPHIM)
| | - M. Esther Gallardo
- Biochemistry Departament, Biomedical Research Institute “Alberto Sols”, Medicine College, UAM-CSIC
- Rare Diseases Biomedical Research Centre (CIBERER)
- Health Research Institute “Hospital 12 de Octubre (i+12)”
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Sanchez-Martinez A, Calleja M, Peralta S, Matsushima Y, Hernandez-Sierra R, Whitworth AJ, Kaguni LS, Garesse R. Modeling pathogenic mutations of human twinkle in Drosophila suggests an apoptosis role in response to mitochondrial defects. PLoS One 2012; 7:e43954. [PMID: 22952820 PMCID: PMC3429445 DOI: 10.1371/journal.pone.0043954] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 07/27/2012] [Indexed: 01/31/2023] Open
Abstract
The human gene C10orf2 encodes the mitochondrial replicative DNA helicase Twinkle, mutations of which are responsible for a significant fraction of cases of autosomal dominant progressive external ophthalmoplegia (adPEO), a human mitochondrial disease caused by defects in intergenomic communication. We report the analysis of orthologous mutations in the Drosophila melanogaster mitochondrial DNA (mtDNA) helicase gene, d-mtDNA helicase. Increased expression of wild type d-mtDNA helicase using the UAS-GAL4 system leads to an increase in mtDNA copy number throughout adult life without any noteworthy phenotype, whereas overexpression of d-mtDNA helicase containing the K388A mutation in the helicase active site results in a severe depletion of mtDNA and a lethal phenotype. Overexpression of two d-mtDNA helicase variants equivalent to two human adPEO mutations shows differential effects. The A442P mutation exhibits a dominant negative effect similar to that of the active site mutant. In contrast, overexpression of d-mtDNA helicase containing the W441C mutation results in a slight decrease in mtDNA copy number during the third instar larval stage, and a moderate decrease in life span in the adult population. Overexpression of d-mtDNA helicase containing either the K388A or A442P mutations causes a mitochondrial oxidative phosphorylation (OXPHOS) defect that significantly reduces cell proliferation. The mitochondrial impairment caused by these mutations promotes apoptosis, arguing that mitochondria regulate programmed cell death in Drosophila. Our study of d-mtDNA helicase overexpression provides a tractable Drosophila model for understanding the cellular and molecular effects of human adPEO mutations.
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Affiliation(s)
- Alvaro Sanchez-Martinez
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, and Centro de Investigación Biomédica en Red en Enfermedades Raras, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Santitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Manuel Calleja
- Centro de Biología Molecular “Severo Ochoa” Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Susana Peralta
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, and Centro de Investigación Biomédica en Red en Enfermedades Raras, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Santitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Yuichi Matsushima
- Department of Biochemistry and Molecular Biology and Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, Michigan, United States of America
| | - Rosana Hernandez-Sierra
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, and Centro de Investigación Biomédica en Red en Enfermedades Raras, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Santitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Alexander J. Whitworth
- Department of Biomedical Sciences, MRC Centre for Developmental and Biomedical Genetics, University of Sheffield, Sheffield, United Kingdom
| | - Laurie S. Kaguni
- Department of Biochemistry and Molecular Biology and Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, Michigan, United States of America
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, and Centro de Investigación Biomédica en Red en Enfermedades Raras, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Investigación Santitaria Hospital 12 de Octubre (i+12), Madrid, Spain
- * E-mail:
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Peralta S, Clemente P, Sánchez-Martínez A, Calleja M, Hernández-Sierra R, Matsushima Y, Adán C, Ugalde C, Fernández-Moreno MÁ, Kaguni LS, Garesse R. Coiled coil domain-containing protein 56 (CCDC56) is a novel mitochondrial protein essential for cytochrome c oxidase function. J Biol Chem 2012; 287:24174-85. [PMID: 22610097 DOI: 10.1074/jbc.m112.343764] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In Drosophila melanogaster, the mitochondrial transcription factor B1 (d-mtTFB1) transcript contains in its 5'-untranslated region a conserved upstream open reading frame denoted as CG42630 in FlyBase. We demonstrate that CG42630 encodes a novel protein, the coiled coil domain-containing protein 56 (CCDC56), conserved in metazoans. We show that Drosophila CCDC56 protein localizes to mitochondria and contains 87 amino acids in flies and 106 in humans with the two proteins sharing 42% amino acid identity. We show by rapid amplification of cDNA ends and Northern blotting that Drosophila CCDC56 protein and mtTFB1 are encoded on a bona fide bicistronic transcript. We report the generation and characterization of two ccdc56 knock-out lines in Drosophila carrying the ccdc56(D6) and ccdc56(D11) alleles. Lack of the CCDC56 protein in flies induces a developmental delay and 100% lethality by arrest of larval development at the third instar. ccdc56 knock-out larvae show a significant decrease in the level of fully assembled cytochrome c oxidase (COX) and in its activity, suggesting a defect in complex assembly; the activity of the other oxidative phosphorylation complexes remained either unaffected or increased in the ccdc56 knock-out larvae. The lethal phenotype and the decrease in COX were partially rescued by reintroduction of a wild-type UAS-ccdc56 transgene. These results indicate an important role for CCDC56 in the oxidative phosphorylation system and in particular in COX function required for proper development in D. melanogaster. We propose CCDC56 as a candidate factor required for COX biogenesis/assembly.
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Affiliation(s)
- Susana Peralta
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" Universidad Autónoma de Madrid (UAM)-Consejo Superior de Investigaciones Científicas (CSIC), Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Facultad de Medicina, 28029 Madrid, Spain
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31
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González-Ramos M, Mora I, de Frutos S, Garesse R, Rodríguez-Puyol M, Olmos G, Rodríguez-Puyol D. Intracellular redox equilibrium is essential for the constitutive expression of AP-1 dependent genes in resting cells: studies on TGF-β1 regulation. Int J Biochem Cell Biol 2012; 44:963-71. [PMID: 22429882 DOI: 10.1016/j.biocel.2012.03.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 02/17/2012] [Accepted: 03/02/2012] [Indexed: 11/29/2022]
Abstract
The mechanisms involved in the continuous expression of constitutive genes are unclear. We hypothesize that steady state intracellular reactive oxygen species (ROS), which their levels are tightly maintained, could be regulating the expression of these constitutive genes in resting cells. We analyzed the regulation of an important constitutive gene, TGF-β1, after decreasing intracellular ROS concentration in human mesangial cells. Decreased intracellular hydrogen peroxide by catalase addition reduced TGF-β1 protein, mRNA expression and promoter activity. Furthermore, catalase decreased the basal activity of Activated Protein-1 (AP-1) that regulates TGF-β1 promoter activity. This effect disappeared when AP-1 binding site was removed. Similar results were observed with another protein containing AP-1 binding sites in its promoter, such as eNOS, but it was not the case in other constitutive genes without any AP-1 binding site, as COX1 or PKG1. The pharmacological inhibition of the different ROS synthesis sources by blocking NADPH oxidase, the mitochondrial respiratory chain or xanthine oxidase, or the use of human fibroblasts with genetically deficient mitochondrial activity, induced a similar, significant reduction of steady state ROS concentration as the one observed with catalase. Moreover, there was decreased TGF-β1 expression in all the cases excepting the xanthine oxidase blockade. These findings suggest a novel role for the steady state intracellular ROS concentration, where the compartmentalized, different systems involved in the intracellular ROS production, could be essential for the expression of constitutive AP1-dependent genes, as TGF-β1.
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Affiliation(s)
- Marta González-Ramos
- Department of Physiology, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
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Arredondo JJ, Gallardo ME, García-Pavía P, Domingo V, Bretón B, García-Silva MT, Sedano MJ, Martín MA, Arenas J, Cervera M, Garesse R, Bornstein B. Mitochondrial tRNA valine as a recurrent target for mutations involved in mitochondrial cardiomyopathies. Mitochondrion 2011; 12:357-62. [PMID: 21986556 DOI: 10.1016/j.mito.2011.09.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 09/15/2011] [Accepted: 09/20/2011] [Indexed: 11/28/2022]
Abstract
The aim of this study was to identify the genetic defect in two patients having cardiac dysfunction accompanied by neurological symptoms, and in one case MRI evidence of cortical and cerebellar atrophy with hyperintensities in the basal ganglia. Muscle biopsies from each patient revealed single and combined mitochondrial respiratory chain deficiency. The complete mtDNA sequencing of both patients revealed two transitions in the mitochondrial tRNA(Val) gene (MT-TV) (m.1628C>T in Patient 1, and m.1644G>A in Patient 2). The functional and molecular analyses reported here suggest that the MT-TV gene should be routinely considered in the diagnosis of mitochondrial cardiomyopathies.
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Affiliation(s)
- Juan J Arredondo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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Gallardo ME, García-Pavía P, Chamorro R, Vázquez ME, Gómez-Bueno M, Millán I, Almoguera B, Domingo V, Segovia J, Vilches C, Alonso-Pulpón L, Garesse R, Bornstein B. Mitochondrial haplogroups associated with end-stage heart failure and coronary allograft vasculopathy in heart transplant patients. Eur Heart J 2011; 33:346-53. [PMID: 21821846 DOI: 10.1093/eurheartj/ehr280] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
AIMS Mitochondrial haplogroups are known to influence individual predisposition to a wide spectrum of metabolic and degenerative diseases, including ischaemic cardiovascular diseases. We have examined the influence of the mitochondrial DNA (mtDNA) background on the development of human end-stage heart failure (HF) in patients undergoing heart transplantation. The influence of mtDNA haplogroups on the incidence of transplant-related complications, mainly cardiac allograft vasculopathy (CAV), and on post-transplant survival was also studied. METHODS AND RESULTS The most common mitochondrial haplogroups in European populations were genotyped in 450 heart transplant recipients, 248 heart transplant donors, and 206 healthy controls. Mitochondrial haplogroups were determined by PCR amplification of short mtDNA fragments, followed by restriction fragment length polymorphism analysis. After adjustment for age and sex the frequency of haplogroup H was significantly higher in heart transplant recipients than in controls [OR: 1.86 (95% confidence intervals, CI: 1.27-2.74), P= 0.014], and in heart donors [OR: 1.47 (95% CI: 0.99-2.19), P= 0.032]. Likewise, haplogroup Uk was found significantly more frequently among CAV patients than in non-CAV heart allograft recipients [OR: 4.1 (95% CI: 1.51-11.42), P= 0.042]. Finally, heart donor haplogroups had no influence on the morbidity or mortality after heart transplantation. CONCLUSIONS Mitochondrial haplogroups behave like risk factors for the progress to end-stage HF in a Spanish cardiac transplant population. Mitochondrial DNA variants may have some influence on the appearance of cardiac transplant complications.
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Affiliation(s)
- M Esther Gallardo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
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Garcia-Pavia P, Segovia J, Vazquez M, Salas C, Avellana P, Gomez-Bueno M, Gallardo E, Garcia-Cosio Carmena M, Cobo-Marcos M, Vilches C, Garesse R, Molano J, Bornstein B, Alonso Pulpón L. 392 Genetic Basis of Heart Transplanted Hypertrophic Cardiomyopathy. J Heart Lung Transplant 2011. [DOI: 10.1016/j.healun.2011.01.400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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35
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Posada IJ, Gallardo ME, Domínguez C, Rivera H, Cabello A, Arenas J, Martín MA, Garesse R, Bornstein B. Depleción del ácido desoxirribonucleico mitocondrial y mutaciones de POLG en un paciente con neuropatía sensorial atáxica, disartria y oftalmoplejía. Med Clin (Barc) 2010; 135:452-5. [DOI: 10.1016/j.medcli.2010.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Revised: 03/18/2010] [Accepted: 03/18/2010] [Indexed: 10/19/2022]
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36
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Carilla-Latorre S, Gallardo ME, Annesley SJ, Calvo-Garrido J, Graña O, Accari SL, Smith PK, Valencia A, Garesse R, Fisher PR, Escalante R. MidA is a putative methyltransferase that is required for mitochondrial complex I function. J Cell Sci 2010; 123:1674-83. [DOI: 10.1242/jcs.066076] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Dictyostelium and human MidA are homologous proteins that belong to a family of proteins of unknown function called DUF185. Using yeast two-hybrid screening and pull-down experiments, we showed that both proteins interact with the mitochondrial complex I subunit NDUFS2. Consistent with this, Dictyostelium cells lacking MidA showed a specific defect in complex I activity, and knockdown of human MidA in HEK293T cells resulted in reduced levels of assembled complex I. These results indicate a role for MidA in complex I assembly or stability. A structural bioinformatics analysis suggested the presence of a methyltransferase domain; this was further supported by site-directed mutagenesis of specific residues from the putative catalytic site. Interestingly, this complex I deficiency in a Dictyostelium midA− mutant causes a complex phenotypic outcome, which includes phototaxis and thermotaxis defects. We found that these aspects of the phenotype are mediated by a chronic activation of AMPK, revealing a possible role of AMPK signaling in complex I cytopathology.
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Affiliation(s)
- Sergio Carilla-Latorre
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Arturo Duperier 4, 28029 Madrid, Spain
| | - M. Esther Gallardo
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Arturo Duperier 4, 28029 Madrid, Spain
- CIBERER, ISCIII, Madrid, Spain
| | - Sarah J. Annesley
- Department of Microbiology, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Javier Calvo-Garrido
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Arturo Duperier 4, 28029 Madrid, Spain
| | - Osvaldo Graña
- O. G., Bioinformatics Unit, Structural Biology and Biocomputing Program, A. V., Structural Computational Biology Group, Structural Biology and Biocomputing Program, Centro Nacional de Investigaciones Oncológicas, C/ Melchor Fernández Almagro, 3, 28029 Madrid, Spain
| | - Sandra L. Accari
- Department of Microbiology, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Paige K. Smith
- Department of Microbiology, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Alfonso Valencia
- O. G., Bioinformatics Unit, Structural Biology and Biocomputing Program, A. V., Structural Computational Biology Group, Structural Biology and Biocomputing Program, Centro Nacional de Investigaciones Oncológicas, C/ Melchor Fernández Almagro, 3, 28029 Madrid, Spain
| | - Rafael Garesse
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Arturo Duperier 4, 28029 Madrid, Spain
- CIBERER, ISCIII, Madrid, Spain
| | - Paul R. Fisher
- Department of Microbiology, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Ricardo Escalante
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Arturo Duperier 4, 28029 Madrid, Spain
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37
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Rivera H, Merinero B, Martinez-Pardo M, Arroyo I, Ruiz-Sala P, Bornstein B, Serra-Suhe C, Gallardo E, Marti R, Moran MJ, Ugalde C, Perez-Jurado LA, Andreu AL, Garesse R, Ugarte M, Arenas J, Martin MA. Marked mitochondrial DNA depletion associated with a novel SUCLG1 gene mutation resulting in lethal neonatal acidosis, multi-organ failure, and interrupted aortic arch. Mitochondrion 2010; 10:362-8. [PMID: 20227526 DOI: 10.1016/j.mito.2010.03.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2009] [Revised: 01/27/2010] [Accepted: 03/04/2010] [Indexed: 11/24/2022]
Abstract
The aim of this study was to identify the causative genetic lesion in two apparently unrelated newborns having lethal lactic acidosis, multi-organ failure and congenital malformations including interrupted aortic arch, who exhibited mild methylmalonic aciduria, combined mitochondrial respiratory chain deficiency, and marked muscle mitochondrial DNA depletion. A novel mutation in the SUCLG1 gene was identified. Phenotype severity in Succinate-CoA ligase dysfunction appears to be more correlated to the muscle mtDNA content than to the tissue distribution of the heterodimer subunits. Prominent impairment of mitochondrial respiratory chain may result in deep ravages in developmental tissues leading to multiple organ failure and malformations.
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Affiliation(s)
- Henry Rivera
- Laboratorio de enfermedades mitocondriales, Centro de Investigación, Hospital Universitario 12 de Octubre, Madrid, Spain
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38
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Bornstein B, Almoguera B, Pello R, Gallardo E, Martı´n M, Arenas J, Garesse R. 9 Molecular characterization of mitochondrial diseases with cardiac dysfunction. Mitochondrion 2010. [DOI: 10.1016/j.mito.2009.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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Aragón JJ, Ferreras C, Sánchez C, Sánchez V, Hernández ED, Hermida C, Adan C, Garesse R, Martínez-Costa OH. Organization and Structural Features of Phosphofructokinase and other Glycolytic Enzymes to Meet their Role in Energy Metabolism. Biophys J 2009. [DOI: 10.1016/j.bpj.2008.12.1098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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40
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Adán C, Matsushima Y, Hernández-Sierra R, Marco-Ferreres R, Fernández-Moreno MA, González-Vioque E, Calleja M, Aragón JJ, Kaguni LS, Garesse R. Mitochondrial transcription factor B2 is essential for metabolic function in Drosophila melanogaster development. J Biol Chem 2008; 283:12333-42. [PMID: 18308726 DOI: 10.1074/jbc.m801342200] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Characterization of the basal transcription machinery of mitochondrial DNA (mtDNA) is critical to understand mitochondrial pathophysiology. In mammalian in vitro systems, mtDNA transcription requires mtRNA polymerase, transcription factor A (TFAM), and either transcription factor B1 (TFB1M) or B2 (TFB2M). We have silenced the expression of TFB2M by RNA interference in Drosophila melanogaster. RNA interference knockdown of TF2BM causes lethality by arrest of larval development. Molecular analysis demonstrates that TF2BM is essential for mtDNA transcription during Drosophila development and is not redundant with TFB1M. The impairment of mtDNA transcription causes a dramatic decrease in oxidative phosphorylation and mitochondrial ATP synthesis in the long-lived larvae, and a metabolic shift to glycolysis, which partially restores ATP levels and elicits a compensatory response at the nuclear level that increases mitochondrial mass. At the cellular level, the mitochondrial dysfunction induced by TFB2M knockdown causes a severe reduction in cell proliferation without affecting cell growth, and increases the level of apoptosis. In contrast, cell differentiation and morphogenesis are largely unaffected. Our data demonstrate the essential role of TFB2M in mtDNA transcription in a multicellular organism, and reveal the complex cellular, biochemical, and molecular responses induced by impairment of oxidative phosphorylation during Drosophila development.
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Affiliation(s)
- Cristina Adán
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, CIBERER ISCIII, Facultad de Medicina, Universidad Autónoma de Madrid, C/Arzobispo Morcillo 4, E-28029 Madrid, Spain
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41
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Amati-Bonneau P, Valentino ML, Reynier P, Gallardo ME, Bornstein B, Boissière A, Campos Y, Rivera H, de la Aleja JG, Carroccia R, Iommarini L, Labauge P, Figarella-Branger D, Marcorelles P, Furby A, Beauvais K, Letournel F, Liguori R, La Morgia C, Montagna P, Liguori M, Zanna C, Rugolo M, Cossarizza A, Wissinger B, Verny C, Schwarzenbacher R, Martín MA, Arenas J, Ayuso C, Garesse R, Lenaers G, Bonneau D, Carelli V. OPA1 mutations induce mitochondrial DNA instability and optic atrophy 'plus' phenotypes. Brain 2007; 131:338-51. [PMID: 18158317 DOI: 10.1093/brain/awm298] [Citation(s) in RCA: 371] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Mutations in OPA1, a dynamin-related GTPase involved in mitochondrial fusion, cristae organization and control of apoptosis, have been linked to non-syndromic optic neuropathy transmitted as an autosomal-dominant trait (DOA). We here report on eight patients from six independent families showing that mutations in the OPA1 gene can also be responsible for a syndromic form of DOA associated with sensorineural deafness, ataxia, axonal sensory-motor polyneuropathy, chronic progressive external ophthalmoplegia and mitochondrial myopathy with cytochrome c oxidase negative and Ragged Red Fibres. Most remarkably, we demonstrate that these patients all harboured multiple deletions of mitochondrial DNA (mtDNA) in their skeletal muscle, thus revealing an unrecognized role of the OPA1 protein in mtDNA stability. The five OPA1 mutations associated with these DOA 'plus' phenotypes were all mis-sense point mutations affecting highly conserved amino acid positions and the nuclear genes previously known to induce mtDNA multiple deletions such as POLG1, PEO1 (Twinkle) and SLC25A4 (ANT1) were ruled out. Our results show that certain OPA1 mutations exert a dominant negative effect responsible for multi-systemic disease, closely related to classical mitochondrial cytopathies, by a mechanism involving mtDNA instability.
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Affiliation(s)
- Patrizia Amati-Bonneau
- Département de Biochimie et Génétique, Centre Hospitalier Universitaire d'Angers, Angers, France
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42
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Martínez-Azorín F, Calleja M, Hernández-Sierra R, Farr CL, Kaguni LS, Garesse R. Over-expression of the catalytic core of mitochondrial DNA (mtDNA) polymerase in the nervous system of Drosophila melanogaster reduces median life span by inducing mtDNA depletion. J Neurochem 2007; 105:165-76. [PMID: 17999718 DOI: 10.1111/j.1471-4159.2007.05122.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
DNA polymerase gamma (pol gamma) is the sole DNA polymerase devoted to mitochondrial DNA (mtDNA) replication. We have characterized the molecular and physiological effects of over-expression of the catalytic subunit of pol gamma, pol gamma-alpha, in the nervous system of Drosophila melanogaster using the upstream activation sequence (UAS)/yeast transcriptional activator by binding to UAS (GAL4) system. Tissue-specific over-expression of pol gamma-alpha was confirmed by immunoblot analysis, whereas the very low levels of endogenous protein are undetectable in UAS or GAL4 control lines. The transgenic flies over-expressing pol gamma-alpha in the nervous system showed a moderate increase in pupal lethality, and a significant decrease in the median life span of adult flies. Moreover, these flies displayed a decrease in the rate of synthesis of mtDNA, which is accompanied by a significant mtDNA depletion, and a corresponding decrease in the levels of mitochondrial transcription factor A (mtTFA). Biochemical analysis showed an oxidative phosphorylation (OXPHOS) defect in transgenic flies, which were more susceptible to oxidative stress. Although we did not detect apoptosis in the nervous system of adult transgenic flies, brains of larvae over-expressing pol gamma-alpha showed evidence of increased cell death that correlates with the observed phenotypes. Our data establish an animal model that mimics some of the features of human mtDNA depletion syndromes.
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Affiliation(s)
- Francisco Martínez-Azorín
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Facultad de Medicina CIBERER ISCIII, Universidad Autónoma de Madrid, Madrid, Spain.
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43
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Rivera H, Blázquez A, Carretero J, Alvarez-Cermeño JC, Campos Y, Cabello A, Gonzalez-Vioque E, Borstein B, Garesse R, Arenas J, Martín MA. Mild ocular myopathy associated with a novel mutation in mitochondrial twinkle helicase. Neuromuscul Disord 2007; 17:677-80. [PMID: 17614277 DOI: 10.1016/j.nmd.2007.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Revised: 05/08/2007] [Accepted: 05/16/2007] [Indexed: 11/22/2022]
Abstract
Autosomal dominant PEO is associated with mutations in a number of nuclear genes affecting the intergenomic communication with mitochondrial DNA. We report a Spanish family showing a mild phenotype characterized by autosomal dominant ocular myopathy and morphological signs of mitochondrial dysfunction, that harboured a novel c.1071G>C (p.R357P) mutation in the hot-spot linker region of the twinkle protein.
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Affiliation(s)
- Henry Rivera
- Centro de Investigación, Hospital Universitario 12 de Octubre, Av. de Córdoba s/n, 28041 Madrid, Spain
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44
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Abstract
Ribonucleic acid (RNA) interference triggered by double-stranded RNA has become a powerful tool for generating loss-of-function phenotypes. It is used to inactivate genes of interest and represents an elegant approach to genome functional analysis by reverse genetics. In Drosophila, RNA interference has been used in both cell culture and animals. We have adopted this approach to reveal the physiological roles of a number of proteins involved in mitochondrial deoxyribonucleic acid metabolism, and present here experimental schemes to induce the stable expression of double-stranded RNA in Schneider cells and in transgenic Drosophila.
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45
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Sánchez-Martínez Á, Luo N, Clemente P, Adán C, Hernández-Sierra R, Ochoa P, Fernández-Moreno MÁ, Kaguni LS, Garesse R. Modeling human mitochondrial diseases in flies. Biochim Biophys Acta 2006; 1757:1190-8. [PMID: 16806050 PMCID: PMC4853902 DOI: 10.1016/j.bbabio.2006.05.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2006] [Revised: 04/24/2006] [Accepted: 05/05/2006] [Indexed: 01/16/2023]
Abstract
Human mitochondrial diseases are associated with a wide range of clinical symptoms, and those that result from mutations in mitochondrial DNA affect at least 1 in 8500 individuals. The development of animal models that reproduce the variety of symptoms associated with this group of complex human disorders is a major focus of current research. Drosophila represents an attractive model, in large part because of its short life cycle, the availability of a number of powerful techniques to alter gene structure and regulation, and the presence of orthologs of many human disease genes. We describe here Drosophila models of mitochondrial DNA depletion, deafness, encephalopathy, Freidreich's ataxia, and diseases due to mitochondrial DNA mutations. We also describe several genetic approaches for gene manipulation in flies, including the recently developed method of targeted mutagenesis by recombinational knock-in.
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Affiliation(s)
- Álvaro Sánchez-Martínez
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC-UAM. Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, E-28029 Madrid, Spain
| | - Ningguang Luo
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824-1319, USA
| | - Paula Clemente
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC-UAM. Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, E-28029 Madrid, Spain
| | - Cristina Adán
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC-UAM. Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, E-28029 Madrid, Spain
| | - Rosana Hernández-Sierra
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC-UAM. Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, E-28029 Madrid, Spain
| | - Pilar Ochoa
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC-UAM. Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, E-28029 Madrid, Spain
| | - Miguel Ángel Fernández-Moreno
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC-UAM. Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, E-28029 Madrid, Spain
| | - Laurie S. Kaguni
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824-1319, USA
| | - Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas “Alberto Sols” CSIC-UAM. Facultad de Medicina, Universidad Autónoma de Madrid, Arzobispo Morcillo 4, E-28029 Madrid, Spain
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46
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Bornstein B, Mas J, Patrono C, Fernández-Moreno M, González-Vioque E, Campos Y, Carrozzo R, Martín M, Hoyo P, Santorelli F, Arenas J, Garesse R. Comparative analysis of the pathogenic mechanisms associated with the G8363A and A8296G mutations in the mitochondrial tRNA(Lys) gene. Biochem J 2006; 387:773-8. [PMID: 15554876 PMCID: PMC1135008 DOI: 10.1042/bj20040949] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Two mutations (G8363A and A8296G) in the mtDNA (mitochondrial DNA) tRNA(Lys) gene have been associated with severe mitochondrial diseases in a number of reports. Their functional significance, however, remains unknown. We have already shown that homoplasmic cybrids harbouring the A8296G mutation display normal oxidative phosphorylation, although the possibility of a subtle change in mitochondrial respiratory capacity remains an open issue. We have now investigated the pathogenic mechanism of another mutation in the tRNA(Lys) gene (G8363A) by repopulating an mtDNA-less human osteosarcoma cell line with mitochondria harbouring either this genetic variant alone or an unusual combination of the two mutations (A8296G+G8363A). Cybrids homoplasmic for the single G8363A or the A8296G+G8363A mutations have defective respiratory-chain enzyme activities and low oxygen consumption, indicating a severe impairment of the oxidative phosphorylation system. Generation of G8363A cybrids within a wild-type or the A8296G mtDNA genetic backgrounds resulted in an important alteration in the conformation of the tRNA(Lys), not affecting tRNA steady-state levels. Moreover, mutant cybrids have an important decrease in the proportion of amino-acylated tRNA(Lys) and, consequently, mitochondrial protein synthesis is greatly decreased. Our results demonstrate that the pathogenicity of the G8363A mutation is due to a change in the conformation of the tRNA that severely impairs aminoacylation in the absence of changes in tRNA stability. The only effect detected in the A8296G mutation is a moderate decrease in the aminoacylation capacity, which does not affect mitochondrial protein biosynthesis.
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Affiliation(s)
- Belén Bornstein
- *Departamento de Bioquímica, Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
- †Servicio de Bioquímica, Hospital Severo Ochoa, Leganés, Madrid, Spain
| | - José Antonio Mas
- *Departamento de Bioquímica, Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Clarice Patrono
- *Departamento de Bioquímica, Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
- ‡Unit of Molecular Medicine, Children's Hospital ‘Bambino Gesù’, Rome, Italy
| | - Miguel Angel Fernández-Moreno
- *Departamento de Bioquímica, Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Emiliano González-Vioque
- *Departamento de Bioquímica, Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Yolanda Campos
- §Centro de Investigación, Hospital 12 de Octubre, Madrid, Spain
| | - Rosalba Carrozzo
- ‡Unit of Molecular Medicine, Children's Hospital ‘Bambino Gesù’, Rome, Italy
| | | | - Pilar del Hoyo
- §Centro de Investigación, Hospital 12 de Octubre, Madrid, Spain
| | | | - Joaquín Arenas
- §Centro de Investigación, Hospital 12 de Octubre, Madrid, Spain
| | - Rafael Garesse
- *Departamento de Bioquímica, Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
- To whom correspondence should be addressed (email )
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47
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González-Vioque E, Blázquez A, Fernández-Moreira D, Bornstein B, Bautista J, Arpa J, Navarro C, Campos Y, Fernández-Moreno MA, Garesse R, Arenas J, Martín MA. Association of novel POLG mutations and multiple mitochondrial DNA deletions with variable clinical phenotypes in a Spanish population. ACTA ACUST UNITED AC 2006; 63:107-11. [PMID: 16401742 DOI: 10.1001/archneur.63.1.107] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Both dominant and recessive mutations were reported in the gene encoding the mitochondrial (mt) DNA polymerase gamma (POLG) in patients with progressive external ophthalmoplegia (PEO). Phenotypes other than PEO were recently documented in patients with mutations in the POLG gene. OBJECTIVE To screen patients with mitochondrial disease and multiple mtDNA deletions in muscle for mutations in the coding regions of the POLG, PEO1, and SLC25A4 genes. DESIGN To identify the underlying molecular defect in a group of patients with multiple mtDNA deletions comparing their molecular genetic findings with those of healthy controls. PATIENTS Twenty-four patients (16 men and 8 women) diagnosed with mitochondrial disease and having multiple mtDNA deletions in muscle by Southern blot analysis. Thirteen patients had PEO; 2 had PEO alone, 4 had PEO and myopathy, and 5 had PEO and multisystem involvement. Four patients had multisystem disease without PEO. The remaining 9 patients had isolated myopathy. DNA from 100 healthy individuals was also studied. RESULTS No mutation was identified in the PEO1 or SLC25A4 genes. Nine POLG mutations were observed in 6 of 24 patients. Four novel mutations were detected and mapped in the linker region (M603L) and in the pol domain of the enzyme (R853W; D1184N; R1146C). Five patients with PEO had mutations: 2 were compound heterozygotes, 1 was homozygous, and another showed a mutation in a single allele. The remaining patient also showed a sole mutation and had an unusual phenotype lacking ocular involvement. CONCLUSIONS POLG molecular defects were found in 25% of our patients with multiple mtDNA deletions and mitochondrial disease. The uncommon phenotype found in 1 of these patients stresses the clinical variability of patients harboring POLG mutations. Molecular studies in the POLG gene should be addressed in patients with mitochondrial disease, particularly in those with PEO, and multiple mtDNA deletions.
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Affiliation(s)
- Emiliano González-Vioque
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Universidad Autónoma de Madrid, Hospital Universitario 12 de Octubre, Spain
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48
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Abstract
Mitochondrial biogenesis is a critical process in animal development, cellular homeostasis and aging. Mitochondrial DNA replication is an essential part of this process, and both nuclear and mitochondrial DNA mutations are found to result in mitochondrial dysfunction that leads to developmental defects and delays, aging and disease. Drosophila provides an amenable model system to study mitochondrial biogenesis in normal and disease states. This review provides an overview of current approaches to study the proteins involved in mitochondrial DNA replication, the genes that encode them and their regulation. It also presents a survey of cell and animal models under development to mimic the pathophysiology of human mitochondrial disorders.
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Affiliation(s)
- Rafael Garesse
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.
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49
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Blazquez A, Martín MA, Lara MC, Martí R, Campos Y, Cabello A, Garesse R, Bautista J, Andreu AL, Arenas J. Increased muscle nucleoside levels associated with a novel frameshift mutation in the thymidine phosphorylase gene in a Spanish patient with MNGIE. Neuromuscul Disord 2005; 15:775-8. [PMID: 16198108 DOI: 10.1016/j.nmd.2005.07.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2005] [Revised: 07/15/2005] [Accepted: 07/29/2005] [Indexed: 12/01/2022]
Abstract
We studied a patient with the cardinal features of mitochondrial gastrointestinal encephalomyopathy (MNGIE). Two of his siblings showed a similar clinical picture. Muscle histochemistry displayed ragged red fibres (RRF) which were COX negative and biochemistry revealed combined defects of complexes III and IV of the mitochondrial respiratory chain. Southern-blot analysis showed multiple mtDNA deletions. Molecular analysis of the ECGF1 gene revealed the presence of a homozygous deletion of 20 base pairs in exon 10, c.1460_1479delGACGGCCCCGCGCTCAGCGG, resulting in a frameshift and synthesis of a protein larger than the wild-type. Thymidine and deoxyuridine accumulation was detected in muscle, indicating loss-of-function of thymidine phosphorylase (TP).
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Affiliation(s)
- A Blazquez
- Centro de Investigación and Sección de Neuropatología, Hospital Universitario 12 de Octubre, Madrid, Spain
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50
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Navarro S, Del Hoyo P, Campos Y, Abitbol M, Morán-Jiménez MJ, García-Bravo M, Ochoa P, Grau M, Montagutelli X, Frank J, Garesse R, Arenas J, de Salamanca RE, Fontanellas A. Increased mitochondrial respiratory chain enzyme activities correlate with minor extent of liver damage in mice suffering from erythropoietic protoporphyria. Exp Dermatol 2005; 14:26-33. [PMID: 15660916 DOI: 10.1111/j.0906-6705.2005.00248.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mitochondrial dysfunction might play a role in the pathogenesis of liver damage in erythropoietic protoporphyria (EPP). Changes in mitochondrial respiratory chain activities were evaluated in the Fech(m1pas)/Fech(m1pas) mouse model for EPP. Mice from different strains congenic for the same ferrochelatase germline mutation manifest variable degrees of hepatobiliary injury. Protoporphyric animals bred into the C57BL/6J background showed a higher degree of hepatomegaly and liver damage as well as higher protoporphyrin (PP) accumulation than those bred into the SJL/J and BALB/cJ backgrounds. Whereas mitochondrial respiratory chain activities remained unchanged in the liver of protoporphyric mice C57BL/6J, they were increased in protoporphyric mice from both SJL/J and BALB/cJ backgrounds, when compared to wild-type animals. Mitochondrial respiratory chain activities were increased in Hep G2 cell line after accumulation of PP following addition of aminolevulinic acid. As a direct effect of these elevated mitochondrial activities, in both hepatic cells from mutant mouse strains and Hep G2 cells, adenosine 5'-triphosphate (ATP) levels significantly increased as the intracellular PP concentration was reduced. These results indicate that PP modifies intracellular ATP requirements as well as hepatic mitochondrial respiratory chain enzymatic activities and further suggest that an increase of these activities may provide a certain degree of protection against liver damage in protoporphyric mice.
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Affiliation(s)
- Susana Navarro
- Centro de Investigación, Hospital 12 de Octubre, Avda. de Andalucía, Km 5.4, 28041 Madrid, Spain
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