Cited by 89Mitochondrial Function and PathologyMetabolism and Genetic DisordersGenomics and Rare Diseases

Diagnosis of mitochondrial myopathies

Milone, Margherita, Wong, Lee-Jun·2013·Molecular Genetics and Metabolism

Abstract

Mitochondria are ubiquitous organelles and play crucial roles in vital functions, most importantly, the oxidative phosphorylation and energy metabolism. Therefore, mitochondrial dysfunction can affect multiple tissues, with muscle and nerve preferentially affected. Mitochondrial myopathy is a common clinical phenotype, which is characterized by early fatigue and/or fixed muscle weakness; rhabdomyolysis can seldom occur. Muscle biopsy often identifies signs of diseased mitochondria by morphological studies, while biochemical analysis may identify respiratory chain deficiencies. The clinical, morphological and biochemical data guide molecular analysis. Being the mitochondrial function under the control of both mitochondrial DNA and nuclear DNA, the search for mitochondrial DNA mutations and mitochondrial DNA quantitation, may not be sufficient for the molecular diagnosis of mitochondrial myopathies. Approximately 1500 nuclear genes can affect mitochondrial structure and function and the targeting of such genes may be necessary to reach the diagnosis. The identification of causative molecular defects in nuclear or mitochondrial genome leads to the definite diagnosis of mitochondrial myopathy.

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Crossref · 10.1016/j.ymgme.2013.07.007

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Authors
Milone, M., & Wong, L.-J.
Affiliations
  • Mayo Clinic (US)
  • Baylor College of Medicine (US)
Corresponding author
Wong, Lee-Jun
Venue
Molecular Genetics and Metabolism
Publisher
Elsevier BV
Published
2013-09
Volume
110
Issue
1-2
Pages
35-41
ISSN
1096-7192 (ISSN-L)
OpenAlex
W2001999839
Cited by
89
References
98
Citations by year
2026: 3 · 2025: 5 · 2024: 4 · 2023: 5 · 2022: 2 · 2021: 10 · 2020: 4 · 2019: 12 · 2018: 9 · 2017: 14 · 2016: 9 · 2015: 8 · 2014: 4
FWCI
0.66
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Genetics and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
MDA
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 › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
Keywords
mitochondrial myopathy, mitochondrial dysfunction, oxidative phosphorylation, muscle biopsy, respiratory chain deficiency, mitochondrial DNA mutations, nuclear genes, molecular diagnosis, fatigue, muscle weakness
MeSH terms
DNA, Mitochondrial, Energy Metabolism, Humans, Mitochondria, Mutation, Oxidative Phosphorylation, Mitochondrial Myopathies, Ophthalmoplegia, Chronic Progressive External, Muscle, Skeletal, Mitochondrial Diseases, Pathology, Molecular

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