Cited by 40Mitochondrial Function and PathologyMetabolism and Genetic DisordersGenetic Neurodegenerative Diseases

Psychiatric symptoms in MELAS; a case report

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THOMEER, E C, VERHOEVEN, W M A, VAN DE VLASAKKER, C J W, KLOMPENHOUWER, J L·1998·Journal of Neurology, Neurosurgery & Psychiatry

Abstract

Over the past years much has been clarified about mitochondrial pathology. There are several encephalomyopathies related to mitochondrial dysfunction, of which the most important are Kearns-Sayre syndrome (KSS), myoclonus epilepsy and ragged red fibres syndrome (MERRF) as well as the mitochondrial encephalomyopathy lactic acidosis and stroke-like episodes syndrome (MELAS), about which several reviews were published recently.1-3 The clinical picture of MELAS is the result of a respiratory chain defect and involves mainly the CNS and the skeletal muscles, which are especially vulnerable to mitochondrial dysfunction because of their dependency on the oxidative metabolism.4 5 The histopathological presentation in the skeletal muscles is ragged red fibres which are caused by impaired intramitochondrial protein synthesis. The clinical expression of MELAS is highly variable, in that different mutations can lead to a similar clinical syndrome and a given mutation may be responsible for an inconstant phenotypical expression.6 7 In most cases, the enzymatic defect in MELAS is a complex I deficiency and, to a lesser degree, a complex IV deficiency. The enzyme abnormality is associated with a point mutation at np3243 in the tRNA Leu(UUR) region, which accounts for 80% of the patients with MELAS.5 The MELAS syndrome was first described in 1984 by Pavlakis et al .8 Later, Hirano and Pavakis7described the target symptoms and additional clinical manifestations, based on 110 reported patients with MELAS. The six target symptoms include clinical stroke, seizures, lactic acidosis, ragged red fibres, exercise intolerance, and onset of symptoms before the age of 40. Additional clinical manifestations comprise dementia, limb weakness, short stature, hearing loss, and recurrent migraine-like headaches. Lactic acidosis is the most common finding from laboratory investigations. …

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Crossref · 10.1136/jnnp.64.5.692

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  • Psychiatric illnesses are common in patients with mitochondrial diseases.

    “Studies have shown that psychiatric illnesses are common in patients with mitochondrial diseases. 3 , 4 , 5 , 6”

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Authors
THOMEER, E. C., VERHOEVEN, W. M. A., VAN DE VLASAKKER, C. J. W., & KLOMPENHOUWER, J. L.
Corresponding author
VERHOEVEN, W M A
Venue
Journal of Neurology, Neurosurgery & Psychiatry
Publisher
BMJ
Published
1998-05-01
Volume
64
Issue
5
Pages
692-693
ISSN
0022-3050 (ISSN-L)
OpenAlex
W2029366469
Cited by
40
References
11
Citations by year
2025: 1 · 2023: 2 · 2021: 1 · 2020: 1 · 2015: 1 · 2013: 1 · 2012: 2
FWCI
0.70
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurology Neurosurgery & Psychiatry (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Metabolism and Genetic Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
Keywords
MELAS, mitochondrial encephalomyopathy, psychiatric symptoms, mitochondrial dysfunction, complex I deficiency, lactic acidosis, ragged-red fibers, seizures, stroke-like episodes, Kearns-Sayre syndrome, MERRF
MeSH terms
Adult, Diagnosis, Differential, DNA, Mitochondrial, Female, Follow-Up Studies, Humans, MELAS Syndrome, Point Mutation, Neurocognitive Disorders

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