Cited by 442Mitochondrial Function and PathologyMuscle Physiology and DisordersGenetics, Aging, and Longevity in Model Organisms

Mitochondrial DNA–Deletion Mutations Accumulate Intracellularly to Detrimental Levels in Aged Human Skeletal Muscle Fibers

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Bua, Entela, Johnson, Jody, Herbst, Allen, Delong, Bridget, McKenzie, Debbie, Salamat, Shahriar, Aiken, Judd M.·2006·The American Journal of Human Genetics

Abstract

Skeletal muscle-mass loss with age has severe health consequences, yet the molecular basis of the loss remains obscure. Although mitochondrial DNA (mtDNA)-deletion mutations have been shown to accumulate with age, for these aberrant genomes to be physiologically relevant, they must accumulate to high levels intracellularly and be present in a significant number of cells. We examined mtDNA-deletion mutations in vastus lateralis (VL) muscle of human subjects aged 49-93 years, using both histologic and polymerase-chain-reaction (PCR) analyses, to determine the physiological and genomic integrity of mitochondria in aging human muscle. The number of VL muscle fibers exhibiting mitochondrial electron-transport-system (ETS) abnormalities increased from an estimated 6% at age 49 years to 31% at age 92 years. We analyzed the mitochondrial genotype of 48 single ETS-abnormal, cytochrome c oxidase-negative/succinate dehydrogenase-hyperreactive (COX-/SDH++) fibers from normal aging human subjects and identified mtDNA-deletion mutations in all abnormal fibers. Deletion mutations were clonal within a fiber and concomitant to the COX-/SDH++ region. Quantitative PCR analysis of wild-type and deletion-containing mtDNA genomes within ETS-abnormal regions of single fibers demonstrated that these deletion mutations accumulate to detrimental levels (>90% of the total mtDNA).

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Crossref · 10.1086/507132

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  • The role of mitochondrial dysfunction in the etiology of sarcopenia has been extensively characterized.

    “The role of mitochondrial dysfunction in the etiology of sarcopenia has been extensively characterized (17, 18, 19, 20).”
  • Accumulations of mtDNA damage in the form of point mutations, deletions and depletions are correlated with aging and age-related diseases as observed in human skeletal muscle, liver, brain, heart, skin fibroblasts and colonic crypt stem cells.

    “Accumulations of mtDNA damage in the form of point mutations, deletions and depletions are correlated with aging and age-related diseases as observed in human skeletal muscle (Bua et al., 2006; Fayet et al., 2002), liver (Yen et al., 1991), brain (Corral-Debrinski et al., 1992a; Corral-Debrinski et al., 1994; Lin et al., 2002), heart (Corral-Debrinski et al., 1992b; Cortopassi and Arnheim, 1990),”
  • Most mtDNA deletions share common features: they mainly occur between the origins of replication, O_H and O_L, and are typically flanked by short direct repeats.

    “They mainly occur between the origins of replication, O H and O L , and are typically flanked by short direct repeats [94,95].”

    From Mitochondrial DNA mutations and human disease (2010) · cites this paper as [94]

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Authors
Bua, E., Johnson, J., Herbst, A., Delong, B., McKenzie, D., Salamat, S., & Aiken, J. M.
Affiliations
University of Wisconsin–Madison (US)
Corresponding author
Aiken, Judd M.
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2006-09
Volume
79
Issue
3
Pages
469-480
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2054511417
Cited by
442
References
47
Citations by year
2026: 25 · 2025: 16 · 2024: 23 · 2023: 19 · 2022: 20 · 2021: 16 · 2020: 39 · 2019: 32 · 2018: 23 · 2017: 23 · 2016: 25 · 2015: 25 · 2014: 20 · 2013: 19 · 2012: 19
FWCI
7.49
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (AG-11604, R01AG011604)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
skeletal muscle aging, cytochrome c oxidase deficiency, mitochondrial genotype, muscle mass loss, human aging
MeSH terms
Aged, Aged, 80 and over, Aging, Electron Transport Complex IV, DNA, Mitochondrial, Electron Transport, Female, Humans, Male, Middle Aged, Mitochondria, Muscle, Succinate Dehydrogenase, Sequence Deletion, Muscle, Skeletal, Muscle Fibers, Skeletal, Electron Transport Chain Complex Proteins

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