Cited by 84Neuroinflammation and Neurodegeneration MechanismsGenetics, Aging, and Longevity in Model OrganismsNeurological Disease Mechanisms and Treatments

Senescent Microglia: The Key to the Ageing Brain?

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Greenwood, Eleanor K., Brown, David R.·2021·International Journal of Molecular Sciences

Abstract

Ageing represents the single biggest risk factor for development of neurodegenerative disease. Despite being such long-lived cells, microglia have been relatively understudied for their role in the ageing process. Reliably identifying aged microglia has proven challenging, not least due to the diversity of cell populations, and the limitations of available models, further complicated by differences between human and rodent cells. Consequently, the literature contains multiple descriptions and categorisations of microglia with neurotoxic phenotypes, including senescence, without any unifying markers. The role of microglia in brain homeostasis, particularly iron storage and metabolism, may provide a key to reliable identification.

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Crossref · 10.3390/ijms22094402

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  • The overlapping phenotypes of reactive and senescent microglia, together with heterogeneity of microglial phenotypes in aging and disease, present a challenge to defining senescent microglia and parsing their contribution to dysfunction.

    “The overlapping phenotypes of reactive and senescent microglia together with the heterogeneity of microglial phenotypes described in aging and disease [45,46] present a nuanced challenge to defining senescent microglia and parsing out their contribution to dysfunction.”

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Authors
Greenwood, E. K., & Brown, D. R.
Affiliations
University of Bath (GB)
Corresponding author
Brown, David R.
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2021-04-22
Volume
22
Issue
9
Pages
4402
ISSN
1422-0067 (ISSN-L)
OpenAlex
W3156112491
Cited by
84
References
209
Citations by year
2026: 14 · 2025: 21 · 2024: 19 · 2023: 17 · 2022: 9 · 2021: 4
FWCI
1.43
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
microglia, cellular senescence, brain aging, neurodegenerative diseases, iron metabolism, iron storage, microglial markers, brain homeostasis
MeSH terms
Aging, Animals, Humans, Cellular Senescence, Microglia, Neurodegenerative Diseases

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