On electron microscopy, the abnormal mitochondria present on the first biopsy specimen had disappeared both in muscle fibers and blood vessels; nearly all mitochondria were morphologically normal at the second biopsy. [ncbi.nlm.nih.gov]

She remained welluntil the age of 34 years when she re-presented with symptoms ofmuscle weakness. [docslide.com.br]

The abnormal muscle and mitochondrial morphology in a variety of clinical presentations from isolated ophthalmoplegia to severe encephalopathy are also elaborated. [books.google.com]

Dimauro}, journal={Archives of Disease in Childhood}, year={1992}, volume={67}, pages={1033 - 1035} } Two siblings, a boy and a girl born in a nonconsanguineous marriage, presented with a similar clinical course. [semanticscholar.org]

[…] in adult life Clinical features: May present in adulthood Optic atrophy Growth retardation Spasticity Pulmonary edema KSS like presentation Coenzyme Q10 (CoQ) Deficiency Onset may present in midlife: Encoded by nuclear genome Transfers electron from [neurodiffdx.com]

• Muscle Hypotonia

  Clinically, patients had severe generalized muscle hypotonia and weakness from birth to 3 months of age. Two patients had facial muscle involvement and high-arched palate. [pediatricneurologybriefs.com]

  At age 7 months neurological examination revealed marked generalized muscle weakness and wasting, diffuse muscle hypotonia and no deep tendon reflexes. [docslide.net]

  Affected children uniformly present with severe muscle weakness and hypotonia in the first days or weeks of life and often require assisted ventilation. [mafiadoc.com]

• Hyporeflexia

  Richard Koenigsberger and Darryl C Devivo}, journal={Annals of neurology}, year={1981}, volume={14 2}, pages={ 226-34 } } Published in Annals of neurology 1981 DOI: 10.1002/ana.410140209 A 2-week-old boy had profound generalized weakness, hypotonia, hyporeflexia [semanticscholar.org]

  Pediatric Neurology, Columbia University College of Physicians and Surgeons, New York, NY 10032 Search for more papers by this author First published: August 1983 Citations: 151 Abstract A 2-week-old boy had profound generalized weakness, hypotonia, hyporeflexia [onlinelibrary.wiley.com]

  Abstract A 2‐week‐old boy had profound generalized weakness, hypotonia, hyporeflexia, macroglossia, and severe lactic acidosis. The infant improved spontaneously: he held his head at 4 1/2 months, rolled over at 7 months, and walked by 16 months. [doi.org]

• Areflexia

  At age 4 1/2 months, she had generalized weakness, hypotonia, areflexia, and macroglossia. She developed cyanosis and respiratory failure, and marked cardiomegaly was noted. She died at age 8 1/2 months of cardiac arrest. [unboundmedicine.com]

  At age 41/2 months, she had generalized weakness, hypotonia, areflexia, and macroglossia. She developed cyanosis and respiratory failure, and marked cardiomegaly was noted. She died at age 81/2 months of cardiac arrest. [jamanetwork.com]

  […] thiamine pyrophosphokinase 230 deficiency/Thiamine Metabolism Dysfunction Syndrome-5 (THMD5), Spinocerebellar ataxia-28 (SCA28), autosomal dominant cerebellar ataxia, deafness, and narcolepsy (ADCA-DN), Dominant Optic Atrophy (DOA), cerebellar ataxia, areflexia [brevets-patents.ic.gc.ca]

Early diagnosis is crucial to provide intensive treatment until spontaneous clinical improvement appears. [herbal-organic.com]

Olfactory cell lines may provide a cell model forthe future assessment of pharmacological agents that are developedfor the treatment of MNGIE syndrome.doi:10.1016/j.jocn.2010.07.05757. [docslide.com.br]

Other treatment is symptomatic and supportive. [rarediseases.org]

Treatment with dichloroacetate lowered the serum lactic acid level but did not affect his clinical condition. At 13 months of age, cardiomyopathy was diagnosed and he died at the age of 29 months of circulatory failure. [pedneur.com]

Current investigations cannot distinguish those with a good prognosis from those with terminal disease, making it very difficult to decide when to continue intensive supportive care. [nemoursresearch.org]

This study provides the rationale for a simple genetic test to identify infants with mitochondrial myopathy and good prognosis. [f1000.com]

Neonatal cardiomyopathies commonly are associated with poor prognosis, and the underlying etiology of this disorder differs considerably from cardiomyopathies in older children, adolescents, and adults with similar phenotypes. [journals.lww.com]

Mitochondrial myopathies generally have a bad prognosis. But recently Horvath et al., 20 have described the genetics of a rare but strangely, relatively benign form of mitochondrial myopathy.” [medcraveonline.com]

Neonatal cardiomyopathies commonly are associated with poor prognosis, and the underlying etiology of this disorder differs considerably from cardiomyopathies in older children, adolescents, and adults with similar phenotypes. [journals.lww.com]

Mitochondrial disease--its impact, etiology, and pathology. Curr Top Dev Biol 77:113-55 Phoenix C; Schaefer AM; Elson JL; Morava E; Bugiani M; Uziel G; Smeitink JA; Turnbull DM; McFarland R, 2006. [newcastle-mitochondria.com]

Is the tRNALeu(UUR) gene an etiologic hot spot?". The Journal of Clinical Investigation 92(6):2906-2915. 156. Moraes, C. T., Ciacci, F., Silverstri, G., Shanske, S., Sciacco, M., Hirano, M., Schon, E. A., Bonilla, E. and DiMauro, S. (1993). [mitomap.org]

[…] deficiency - Reversible infantile cytochrome c oxidase deficiency - Reversible infantile respiratory chain deficiency Classification (Orphanet): - Inborn errors of metabolism - Rare genetic disease Classification (ICD10): - Diseases of the nervous system - Epidemiological [csbg.cnb.csic.es]

"Molecular epidemiology of childhood mitochondrial encephalomyopathies in a Finnish population: sequence analysis of entire mtDNA of 17 children reveals heteroplasmic mutations in tRNAArg, tRNAGlu, and tRNALeu(UUR) genes". [mitomap.org]

Sepsis–induced cardiomyopathy: a review of pathophysiologic mechanisms. Heart Fail Rev. 2010;15(6):605–611. Parker MM, Shelhamer JH, Bacharach SL, et al. Profound but Reversible myocardial depression in patients with septic shock. [medcraveonline.com]

Schon and Salvatore DiMauro, Primary Disorders of Mitochondrial DNA and the Pathophysiology of mtDNA-Related Disorders, Mitochondria in Pathogenesis, 10.1007/0-306-46835-2_3, (53-80), (2002). Rachel A. Nardin and Donald R. [doi.org]

"Familial mitochondrial encephalomyopathy (MERRF): Genetic, pathophysiological, and biochemical characterization of a mitochondrial DNA disease". Cell 55(4):601-610. [mitomap.org]

Pathophysiology of exercise in a novel human muscle oxidative defect. J. Clin. Investig. 1991, 88, 1197–1206. [mdpi.com]

A method for treating or preventing a mitochondrial disease or disorder in a subject in need thereof, comprising administering to the subject a therapeutically effective amount of a catechol derivative or a pharmaceutically acceptable salt thereof, in [brevets-patents.ic.gc.ca]

View Article PubMed Google Scholar Dasgupta S, Hoque MO, Upadhyay S, Sidransky D: Forced cytochrome B gene mutation expression induces mitochondrial proliferation and prevents apoptosis in human uroepithelial SV-HUC-1 cells. [cancerandmetabolism.biomedcentral.com]

Addition of catalase prevents contamination from endogenous peroxidase activity. [mdpi.com]