Cited by 108Neurogenesis and neuroplasticity mechanismsDNA Repair MechanismsGenetics, Aging, and Longevity in Model Organisms

DNA damage in the oligodendrocyte lineage and its role in brain aging

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Tse, Kai-Hei, Herrup, Karl·2017·Mechanisms of Ageing and Development

Abstract

Myelination is a recent evolutionary addition that significantly enhances the speed of transmission in the neural network. Even slight defects in myelin integrity impair performance and enhance the risk of neurological disorders. Indeed, myelin degeneration is an early and well-recognized neuropathology that is age associated, but appears before cognitive decline. Myelin is only formed by fully differentiated oligodendrocytes, but the entire oligodendrocyte lineage are clear targets of the altered chemistry of the aging brain. As in neurons, unrepaired DNA damage accumulates in the postmitotic oligodendrocyte genome during normal aging, and indeed may be one of the upstream causes of cellular aging - a fact well illustrated by myelin co-morbidity in premature aging syndromes arising from deficits in DNA repair enzymes. The clinical and experimental evidence from Alzheimer's disease, progeroid syndromes, ataxia-telangiectasia and other conditions strongly suggest that oligodendrocytes may in fact be uniquely vulnerable to oxidative DNA damage. If this damage remains unrepaired, as is increasingly true in the aging brain, myelin gene transcription and oligodendrocyte differentiation is impaired. Delineating the relationships between early myelin loss and DNA damage in brain aging will offer an additional dimension outside the neurocentric view of neurodegenerative disease.

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Crossref · 10.1016/j.mad.2016.05.006

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  • Ageing is often accompanied by a demyelination process, which is associated with increased levels of DNA oxidative damage in aged oligodendrocytes.

    “Ageing is often accompanied by a demyelination process, which is associated with increased levels of DNA oxidative damage in aged oligodendrocytes.147”
  • Oligodendrocytes may lose their ability to myelinate and therefore disrupt axonal health and signaling capabilities when they become senescent.

    “Other important brain cells affected by senescence are oligodendrocytes, which may lose their ability to myelinate and therefore disrupt axonal health and signaling capabilities when they become senescent [154].”

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  1. Raz N Ageing and the Brain, eLS 2001 John Wiley & Sons, Ltd.

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Authors
Tse, K.-H., & Herrup, K.
Affiliations
Hong Kong University of Science and Technology (HK)
Corresponding author
Tse, Kai-Hei
Venue
Mechanisms of Ageing and Development
Publisher
Elsevier BV
Published
2017-01
Volume
161
Issue
Pt A
Pages
37-50
ISSN
0047-6374 (ISSN-L)
OpenAlex
W2399828612
Cited by
108
References
195
Citations by year
2026: 5 · 2025: 18 · 2024: 7 · 2023: 15 · 2022: 12 · 2021: 15 · 2020: 15 · 2019: 8 · 2018: 7 · 2017: 4 · 2016: 2
FWCI
3.53
Type
journal article
Language
en
Open access
Locations
  • Mechanisms of Ageing and Development (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
  • Research Grant Council, Hong Kong SAR (GRF16101315, GRF660813)
  • National Key Basic Research Program of China (2013CB530900)
  • National Institutes of Health of the United States (NS71022)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
DNA damage, oligodendrocyte lineage, brain aging, myelination, myelin degeneration, oxidative DNA damage, DNA repair, cellular aging, premature aging syndromes, Alzheimer's disease, progeroid syndromes, ataxia telangiectasia, oligodendrocyte differentiation
MeSH terms
Aging, Alzheimer Disease, Animals, Brain, Cell Differentiation, DNA Damage, Humans, Neurons, Oligodendroglia

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