Cited by 46Neuroinflammation and Neurodegeneration MechanismsGenetics, Aging, and Longevity in Model OrganismsSingle-cell and spatial transcriptomics

Identification of distinct and age‐dependent p16High microglia subtypes

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Talma, Nynke, Gerrits, Emma, Wang, Boshi, Eggen, Bart J.L., Demaria, Marco·2021·Aging Cell

Abstract

Abstract Cells expressing high levels of the cyclin‐dependent kinase (CDK)4/6 inhibitor p16 (p16High) accumulate in aging tissues and promote multiple age‐related pathologies, including neurodegeneration. Here, we show that the number of p16High cells is significantly increased in the central nervous system (CNS) of 2‐year‐old mice. Bulk RNAseq indicated that genes expressed by p16High cells were associated with inflammation and phagocytosis. Single‐cell RNAseq of brain cells indicated p16High cells were primarily microglia, and their accumulation was confirmed in brains of aged humans. Interestingly, we identified two distinct subpopulations of p16High microglia in the mouse brain, with one being age‐associated and one present in young animals. Both p16High clusters significantly differed from previously described disease‐associated microglia and expressed only a partial senescence signature. Taken together, our study provides evidence for the existence of two p16‐expressing microglia populations, one accumulating with age and another already present in youth that could positively and negatively contribute to brain homeostasis, function, and disease.

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Authors
Talma, N., Gerrits, E., Wang, B., Eggen, B. J. L., & Demaria, M.
Affiliations
University Medical Center Groningen (NL)
Corresponding author
  • Eggen, Bart J.L.
  • Demaria, Marco
Venue
Aging Cell
Publisher
Wiley
Published
2021-10
Volume
20
Issue
10
Pages
e13450-e13450
ISSN
  • 1474-9718 (ISSN-L)
  • 1474-9726
OpenAlex
W3204566092
Cited by
46
References
68
Citations by year
2026: 8 · 2025: 12 · 2024: 14 · 2023: 7 · 2022: 3 · 2021: 1 · 2012: 1
FWCI
2.50
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (publishedVersion, cc-by)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, cc-by)
Funders
Universitair Medisch Centrum Groningen
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 › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Single-cell and spatial transcriptomics
Keywords
p16, microglia, cellular senescence, aging, microglial subpopulations, neuroinflammation, phagocytosis, disease-associated microglia, brain homeostasis, single-cell transcriptomics, bulk RNA-seq
MeSH terms
Aging, Animals, Disease Models, Animal, Humans, Cellular Senescence, Microglia, Cyclin-Dependent Kinase Inhibitor p16, Mice

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