Abstract
Combined respiratory chain deficiency accounts for about 30% of mitochondrial respiratory chain deficiencies and is frequently associated with mtDNA depletion, deletions or point mutations. However combined respiratory chain deficiency may also be caused by mutations in nuclear genes affecting mitochondrial translation. Here we describe a 2-year-old girl, who developed an acute, isolated, severe liver failure with mitochondrial pathology and decreased respiratory chain enzyme activities both in liver and skeletal muscle at 4 months of age. Her liver function improved significantly within a month, liver function tests returned to normal. Liver cirrhosis remained without any further complications so far. Pathogenic compound heterozygous mutations were identified in the TRMU gene. This condition is one of the few mitochondrial disorders with a life-threatening onset showing recovery later in life, therefore a prompt diagnosis and treatment of these patients has great importance in clinical practice. We suggest that TRMU deficiency should be considered in infants with acute liver disease.
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Antonicka H, Sasarman F, Kennaway NG, Shoubridge EA (2006) The molecular basis for tissue specificity of the oxidative phosphorylation deficiencies in patients with mutations in the mitochondrial translation factor EFG1. Hum Mol Genet 15:1835–1846
Bykhovskaya Y, Casas K, Mengesha E, Inbal A, Fischel-Ghodsian N (2004) Missense mutation in pseudouridine synthase 1 (PUS1) causes mitochondrial myopathy and sideroblastic anemia (MLASA). Am J Hum Genet 74:1303–1308
Coenen MJ, Antonicka H, Ugalde C et al. (2004) Mutant mitochondrial elongation factor G1 and combined oxidative phosphorylation deficiency. N Engl J Med 351:2080–2086
Fernandez-Vizarra E, Berardinelli A, Valente L, Tiranti V, Zeviani M (2007) Nonsense mutation in pseudouridylate synthase 1 (PUS1) in two brothers affected by myopathy, lactic acidosis and sideroblastic anaemia (MLASA). J Med Genet 44:173–180
Guan MX, Yan Q, Li X et al. (2006) Mutation in TRMU related to transfer RNA modification modulates the phenotypic expression of the deafness-associated mitochondrial 12S ribosomal RNA mutations. Am J Hum Genet 79:291–302
Horvath R, Kemp JP, Tuppen HA et al. (2009) Molecular basis of infantile reversible cytochrome c oxidase deficiency myopathy. Brain 132:3165–3174
Jacobs HT, Turnbull DM (2005) Nuclear genes and mitochondrial translation: a new class of genetic disease. Trends Genet 21:312–314
Levinger L, Mörl M, Florentz C (2004) Mitochondrial tRNA 3′end metabolism and human disease. Nucl Acids Res 32:5430–5441
Miller C, Saada A, Shaul N et al. (2004) Defective mitochondrial translation caused by a ribosomal protein (MRPS16) mutation. Ann Neurol 56:734–738
Montero R, Sánchez-Alcázar JA, Briones P et al. (2009) Coenzyme Q10 deficiency associated with a mitochondrial DNA depletion syndrome: a case report. Clin Biochem 42:742–745
Riley LG, Cooper S, Hickey P et al. (2010) Mutation of the mitochondrial tyrosyl-tRNA synthetase gene, YARS2, causes myopathy, lactic acidosis, and sideroblastic anemia–MLASA syndrome. Am J Hum Genet 87:52–59
Saada A, Shaag A, Arnon S et al. (2007) Antenatal mitochondrial disease caused by mitochondrial ribosomal protein (MRPS22) mutation. J Med Genet 44:784–786
Sacconi S, Trevisson E, Salviati L et al. (2010) Coenzyme Q10 is frequently reduced in muscle of patients with mitochondrial myopathy. Neuromuscul Disord 20:44–48
Sarzi E, Bourdon A, Chrétien D et al. (2007) Mitochondrial DNA depletion is a prevalent cause of multiple respiratory chain deficiency in childhood. J Pediatr 150:531–534
Smeitink JA, Elpeleg O, Antonicka H et al. (2006) Distinct clinical phenotypes associated with a mutation in the mitochondrial translation elongation factor EFTs. Am J Hum Genet 79:869–877
Smits P, Mattijssen S, Morava E et al. (2010a) Functional consequences of mitochondrial tRNA Trp and tRNA Arg mutations causing combined OXPHOS defects. Eur J Hum Genet 18:324–329
Smits P, Smeitink J, van den Heuvel L (2010b) Mitochondrial translation and beyond: processes implicated in combined oxidative phosphorylation deficiencies. J Biomed Biotechnol 2010:737385
Spinazzola A, Invernizzi F, Carrara F et al. (2009) Clinical and molecular features of mitochondrial DNA depletion syndromes. J Inherit Metab Dis 32:143–158
Tuppen HA, Blakely EL, Turnbull DM, Taylor RW (2010) Mitochondrial DNA mutations and human disease. Biochim Biophys Acta 1797:113–128
Valente L, Tiranti V, Marsano RM et al. (2007) Infantile encephalopathy and defective mitochondrial DNA translation in patients with mutations of mitochondrial elongation factors EFG1 and EFTu. Am J Hum Genet 80:44–58
Yan Q, Bykhovskaya Y, Li R et al. (2006) Human TRMU encoding the mitochondrial 5-methylaminomethyl-2-thiouridylate-methyltransferase is a putative nuclear modifier gene for the phenotypic expression of the deafness-associated 12S rRNA mutations. Biochem Biophys Res Commun 342:1130–1136
Zeharia A, Shaag A, Pappo O et al. (2009) Acute infantile liver failure due to mutations in the TRMU gene. Am J Hum Genet 85:401–407
Acknowledgements
We thank the patient and her family for contributing to this study. We want to thank S. Hertel and I. Kaus for excellent technical assistance, B. Leiendecker for critical reading the manuscript, Professor H. Baba (Dept. of Pathology, University of Essen) for the liver histology and Dr. P. Schneiderat and Professor T. Klopstock (Friedrich-Baur Institute, LMU, Munich) for the biochemical analysis.
RH is supported by the Newcastle upon Tyne Hospitals NHS Charity (RES0211/7262) and the Academy of Medical Sciences (UK, BH090164) and by the MRC (UK) as part of the MRC Centre for Neuromuscular Diseases. US and HL are part of the German network on muscular dystrophies (MD-NET) and JCvKR of the German network on mitochondrial disorders (mitoNET), respectively, both funded by the German ministry of education and research (BMBF, Bonn, Germany).
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Communicated by: Shamima Rahman
Competing interest: None declared.
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Schara, U., von Kleist-Retzow, JC., Lainka, E. et al. Acute liver failure with subsequent cirrhosis as the primary manifestation of TRMU mutations. J Inherit Metab Dis 34, 197–201 (2011). https://doi.org/10.1007/s10545-010-9250-z
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DOI: https://doi.org/10.1007/s10545-010-9250-z