1
|
Gardeitchik T, Mohamed M, Ruzzenente B, Karall D, Guerrero-Castillo S, Dalloyaux D, van den Brand M, van Kraaij S, van Asbeck E, Assouline Z, Rio M, de Lonlay P, Scholl-Buergi S, Wolthuis DFGJ, Hoischen A, Rodenburg RJ, Sperl W, Urban Z, Brandt U, Mayr JA, Wong S, de Brouwer APM, Nijtmans L, Munnich A, Rötig A, Wevers RA, Metodiev MD, Morava E. Bi-allelic Mutations in the Mitochondrial Ribosomal Protein MRPS2 Cause Sensorineural Hearing Loss, Hypoglycemia, and Multiple OXPHOS Complex Deficiencies. Am J Hum Genet 2018; 102:685-695. [PMID: 29576219 DOI: 10.1016/j.ajhg.2018.1002.1012] [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] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/19/2018] [Indexed: 05/26/2023] Open
Abstract
Biogenesis of the mitochondrial oxidative phosphorylation system, which produces the bulk of ATP for almost all eukaryotic cells, depends on the translation of 13 mtDNA-encoded polypeptides by mitochondria-specific ribosomes in the mitochondrial matrix. These mitoribosomes are dual-origin ribonucleoprotein complexes, which contain mtDNA-encoded rRNAs and tRNAs and ∼80 nucleus-encoded proteins. An increasing number of gene mutations that impair mitoribosomal function and result in multiple OXPHOS deficiencies are being linked to human mitochondrial diseases. Using exome sequencing in two unrelated subjects presenting with sensorineural hearing impairment, mild developmental delay, hypoglycemia, and a combined OXPHOS deficiency, we identified mutations in the gene encoding the mitochondrial ribosomal protein S2, which has not previously been implicated in disease. Characterization of subjects' fibroblasts revealed a decrease in the steady-state amounts of mutant MRPS2, and this decrease was shown by complexome profiling to prevent the assembly of the small mitoribosomal subunit. In turn, mitochondrial translation was inhibited, resulting in a combined OXPHOS deficiency detectable in subjects' muscle and liver biopsies as well as in cultured skin fibroblasts. Reintroduction of wild-type MRPS2 restored mitochondrial translation and OXPHOS assembly. The combination of lactic acidemia, hypoglycemia, and sensorineural hearing loss, especially in the presence of a combined OXPHOS deficiency, should raise suspicion for a ribosomal-subunit-related mitochondrial defect, and clinical recognition could allow for a targeted diagnostic approach. The identification of MRPS2 as an additional gene related to mitochondrial disease further expands the genetic and phenotypic spectra of OXPHOS deficiencies caused by impaired mitochondrial translation.
Collapse
Affiliation(s)
- Thatjana Gardeitchik
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Department of Human Genetics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Miski Mohamed
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Benedetta Ruzzenente
- INSERM U1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France
| | - Daniela Karall
- Clinic for Pediatrics, Inherited Metabolic Disorders, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Sergio Guerrero-Castillo
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Medical Center, 6500 HB Nijmegen, the Netherlands; Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Daisy Dalloyaux
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Mariël van den Brand
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Sanne van Kraaij
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Ellyze van Asbeck
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Zahra Assouline
- Departments of Pediatrics, Neurology, and Genetics, Hôpital Necker-Enfants-Malades, 75015 Paris, France
| | - Marlene Rio
- Departments of Pediatrics, Neurology, and Genetics, Hôpital Necker-Enfants-Malades, 75015 Paris, France
| | - Pascale de Lonlay
- Reference Center for Inherited Metabolic Diseases, Hôpital Necker-Enfants-Malades, Assistance Publique - Hôpitaux de Paris, Université Paris Descartes, Institut Imagine, 75015 Paris, France
| | - Sabine Scholl-Buergi
- Clinic for Pediatrics, Inherited Metabolic Disorders, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - David F G J Wolthuis
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Alexander Hoischen
- Department of Human Genetics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Richard J Rodenburg
- Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Medical Center, 6500 HB Nijmegen, the Netherlands; Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Wolfgang Sperl
- Clinic for Pediatrics, Inherited Metabolic Disorders, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Zsolt Urban
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15261, USA
| | - Ulrich Brandt
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Medical Center, 6500 HB Nijmegen, the Netherlands; Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Johannes A Mayr
- Department of Pediatrics, Paracelsus Medical University, Salzburg, Austria
| | - Sunnie Wong
- Hayward Genetics Center, Tulane University, LA 70112, USA
| | - Arjan P M de Brouwer
- Department of Human Genetics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Donders Institute for Brain, Cognition and Behaviour, Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Leo Nijtmans
- Department of Pediatrics, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands; Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Arnold Munnich
- INSERM U1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France; Departments of Pediatrics, Neurology, and Genetics, Hôpital Necker-Enfants-Malades, 75015 Paris, France
| | - Agnès Rötig
- INSERM U1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France
| | - Ron A Wevers
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud University Medical Center, 6500 HB Nijmegen, the Netherlands
| | - Metodi D Metodiev
- INSERM U1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France.
| | - Eva Morava
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA.
| |
Collapse
|
2
|
Nouws J, Wibrand F, van den Brand M, Venselaar H, Duno M, Lund AM, Trautner S, Nijtmans L, Ostergard E. A Patient with Complex I Deficiency Caused by a Novel ACAD9 Mutation Not Responding to Riboflavin Treatment. JIMD Rep 2013; 12:37-45. [PMID: 23996478 DOI: 10.1007/8904_2013_242] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [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: 03/12/2013] [Revised: 05/14/2013] [Accepted: 05/16/2013] [Indexed: 12/31/2022] Open
Abstract
Here we report a patient with a new pathogenic mutation in ACAD9. Shortly after birth she presented with respiratory insufficiency and a high lactate level. At age 7 weeks, she was diagnosed with severe hypertrophic cardiomyopathy and she suffered from muscle weakness and hypotonia. Her condition deteriorated during intercurrent illnesses and she died at 6 months of age in cardiogenic shock. Analysis of respiratory chain activities in muscle and fibroblasts revealed an isolated complex I deficiency. A genome-wide screen for homozygosity revealed several homozygous regions. Four candidate genes were found and sequencing revealed a homozygous missense mutation in ACAD9. The mutation results in an Ala220Val amino acid substitution located near the catalytic core of ACAD9. SDS and BN-PAGE analysis showed severely decreased ACAD9 and complex I protein levels, and lentiviral complementation of patient fibroblasts partially rescued the complex I deficiency. Riboflavin supplementation did not ameliorate the complex I deficiency in patient fibroblasts. More than a dozen ACAD9 patients with complex I deficiency have been identified in the last 3 years, indicating that ACAD9 is important for complex I assembly, and that ACAD9 mutations are a relatively frequent cause of complex I deficiency.
Collapse
Affiliation(s)
- Jessica Nouws
- Nijmegen Centre for Mitochondrial Disorders at the Department of Pediatrics, Radboud University Medical Centre, 6500 HB, Nijmegen, The Netherlands
| | | | | | | | | | | | | | | | | |
Collapse
|
4
|
Ostergaard E, Rodenburg RJ, van den Brand M, Thomsen LL, Duno M, Batbayli M, Wibrand F, Nijtmans L. Respiratory chain complex I deficiency due to NDUFA12 mutations as a new cause of Leigh syndrome. J Med Genet 2011; 48:737-40. [PMID: 21617257 DOI: 10.1136/jmg.2011.088856] [Citation(s) in RCA: 46] [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: 11/04/2022]
Abstract
BACKGROUND This study investigated a girl with Leigh syndrome born to first-cousin parents of Pakistani descent with an isolated respiratory chain complex I deficiency in muscle and fibroblasts. Her early development was delayed, and from age 2 years she started losing motor abilities. Cerebral MRI showed basal ganglia lesions typical of Leigh syndrome. METHODS AND RESULTS A genome-wide search for homozygosity was performed with the Affymetrix GeneChip 50K Xba array. The analysis revealed several homozygous regions. Three candidate genes were identified, and in one of the genes, NDUFA12, a homozygous c.178C→T mutation leading to a premature stop codon (p.Arg60X) was found. Western blot analysis showed absence of NDUFA12 protein in patient fibroblasts and functional complementation by a baculovirus system showed restoration of complex I activity. CONCLUSION NDUFA12 mutations are apparently not a frequent cause of complex I deficiency, since mutations were not found by screening altogether 122 complex I deficient patients in two different studies. NDUFA12 encodes an accessory subunit of complex I and is a paralogue of NDUFAF2. Despite the complete absence of NDUFA12 protein, a fully assembled and enzymatically active complex I could be found, albeit in reduced amounts. This suggests that NDUFA12 is required either at a late step in the assembly of complex I, or in the stability of complex I.
Collapse
Affiliation(s)
- Elsebet Ostergaard
- Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
| | | | | | | | | | | | | | | |
Collapse
|
5
|
Kolanczyk M, Pech M, Zemojtel T, Yamamoto H, Mikula I, Calvaruso MA, van den Brand M, Richter R, Fischer B, Ritz A, Kossler N, Thurisch B, Spoerle R, Smeitink J, Kornak U, Chan D, Vingron M, Martasek P, Lightowlers RN, Nijtmans L, Schuelke M, Nierhaus KH, Mundlos S. NOA1 is an essential GTPase required for mitochondrial protein synthesis. Mol Biol Cell 2010; 22:1-11. [PMID: 21118999 PMCID: PMC3016967 DOI: 10.1091/mbc.e10-07-0643] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [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: 01/17/2023] Open
Abstract
Nitric oxide associated-1 (NOA1) is an evolutionarily conserved guanosine triphosphate binding protein that localizes predominantly to mitochondria in mammalian cells. Here we determine NOA1 function through generation of knock-out mice and in vitro assays. Nitric oxide associated-1 (NOA1) is an evolutionarily conserved guanosine triphosphate (GTP) binding protein that localizes predominantly to mitochondria in mammalian cells. On the basis of bioinformatic analysis, we predicted its possible involvement in ribosomal biogenesis, although this had not been supported by any experimental evidence. Here we determine NOA1 function through generation of knockout mice and in vitro assays. NOA1-deficient mice exhibit midgestation lethality associated with a severe developmental defect of the embryo and trophoblast. Primary embryonic fibroblasts isolated from NOA1 knockout embryos show deficient mitochondrial protein synthesis and a global defect of oxidative phosphorylation (OXPHOS). Additionally, Noa1–/– cells are impaired in staurosporine-induced apoptosis. The analysis of mitochondrial ribosomal subunits from Noa1–/– cells by sucrose gradient centrifugation and Western blotting showed anomalous sedimentation, consistent with a defect in mitochondrial ribosome assembly. Furthermore, in vitro experiments revealed that intrinsic NOA1 GTPase activity was stimulated by bacterial ribosomal constituents. Taken together, our data show that NOA1 is required for mitochondrial protein synthesis, likely due to its yet unidentified role in mitoribosomal biogenesis. Thus, NOA1 is required for such basal mitochondrial functions as adenosine triphosphate (ATP) synthesis and apoptosis.
Collapse
Affiliation(s)
- Mateusz Kolanczyk
- Development & Disease Group, Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Smits P, Mattijssen S, Morava E, van den Brand M, van den Brandt F, Wijburg F, Pruijn G, Smeitink J, Nijtmans L, Rodenburg R, van den Heuvel L. Functional consequences of mitochondrial tRNA Trp and tRNA Arg mutations causing combined OXPHOS defects. Eur J Hum Genet 2010; 18:324-9. [PMID: 19809478 PMCID: PMC2987211 DOI: 10.1038/ejhg.2009.169] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 07/16/2009] [Accepted: 08/11/2009] [Indexed: 11/09/2022] Open
Abstract
Combined oxidative phosphorylation (OXPHOS) system deficiencies are a group of mitochondrial disorders that are associated with a range of clinical phenotypes and genetic defects. They occur in approximately 30% of all OXPHOS disorders and around 4% are combined complex I, III and IV deficiencies. In this study we present two mutations in the mitochondrial tRNA(Trp) (MT-TW) and tRNA(Arg) (MT-TR) genes, m.5556G>A and m.10450A>G, respectively, which were detected in two unrelated patients showing combined OXPHOS complex I, III and IV deficiencies and progressive multisystemic diseases. Both mitochondrial tRNA mutations were almost homoplasmic in fibroblasts and muscle tissue of the two patients and not present in controls. Patient fibroblasts showed a general mitochondrial translation defect. The mutations resulted in lowered steady-state levels and altered conformations of the tRNAs. Cybrid cell lines showed similar tRNA defects and impairment of OXPHOS complex assembly as patient fibroblasts. Our results show that these tRNA(Trp) and tRNA(Arg) mutations cause the combined OXPHOS deficiencies in the patients, adding to the still expanding group of pathogenic mitochondrial tRNA mutations.
Collapse
MESH Headings
- Base Sequence
- Blotting, Northern
- Child, Preschool
- DNA Mutational Analysis
- DNA, Mitochondrial/genetics
- Electron Transport Complex I/metabolism
- Electrophoresis, Polyacrylamide Gel
- Fatal Outcome
- Female
- Fibroblasts/enzymology
- Fibroblasts/pathology
- Humans
- Infant
- Infant, Newborn
- Male
- Mitochondria/enzymology
- Mitochondria/genetics
- Mitochondrial Diseases/genetics
- Molecular Sequence Data
- Muscle, Skeletal/enzymology
- Muscle, Skeletal/pathology
- Mutation/genetics
- Nucleic Acid Conformation
- Pregnancy
- Protein Biosynthesis
- RNA, Transfer, Amino Acyl/chemistry
- RNA, Transfer, Amino Acyl/genetics
Collapse
Affiliation(s)
- Paulien Smits
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Sandy Mattijssen
- Department of Biomolecular Chemistry, Nijmegen Center for Molecular Life Sciences, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Eva Morava
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Mariël van den Brand
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Frans van den Brandt
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Frits Wijburg
- Department of Pediatrics (G8-205), Emma Children's Hospital AMC, Academic Medical Center, Amsterdam, The Netherlands
| | - Ger Pruijn
- Department of Biomolecular Chemistry, Nijmegen Center for Molecular Life Sciences, Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Jan Smeitink
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Leo Nijtmans
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Richard Rodenburg
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Lambert van den Heuvel
- Department of Pediatrics, Nijmegen Center for Mitochondrial Disorders, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| |
Collapse
|