Cited by 27Neurogenesis and neuroplasticity mechanismsGenomics and Chromatin DynamicsDevelopmental Biology and Gene Regulation

Changing and stable chromatin accessibility supports transcriptional overhaul during neural stem cell activation and is altered with age

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Maybury‐Lewis, Sun Y., Brown, Abigail K., Yeary, Mitchell, Sloutskin, Anna, Dhakal, Shleshma, Juven‐Gershon, Tamar, Webb, Ashley E.·2021·Aging Cell

Abstract

Neural stem cells (NSCs) in the adult and aged brain are largely quiescent, and require transcriptional reprogramming to re‐enter the cell cycle. However, the mechanisms underlying these changes and how they are altered with age remain undefined. Here, we identify the chromatin accessibility differences between primary neural stem/progenitor cells in quiescent and activated states. These distinct cellular states exhibit shared and unique chromatin profiles, both associated with gene regulation. Accessible chromatin states specific to activation or quiescence are active enhancers bound by key pro‐neurogenic and quiescence factors. In contrast, shared sites are enriched for core promoter elements associated with translation and metabolism. Unexpectedly, through integrated analysis, we find that many sites that become accessible during NSC activation are linked to gene repression and associated with pro‐quiescence factors, revealing a novel mechanism that may preserve quiescence re‐entry. Furthermore, we report that in aged NSCs, chromatin regions associated with metabolic and transcriptional functions bound by key pro‐quiescence transcription factors lose accessibility, suggesting a novel mechanism of age‐associated NSC dysfunction. Together, our findings reveal how accessible chromatin states regulate the transcriptional switch between NSC quiescence and activation, and how this switch is affected with age.

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  • Primary cultures of old quiescent NSCs exhibit increased chromatin accessibility at genes involved in quiescence, a potential mechanism underlying deep quiescence during ageing.

    “Primary cultures of old quiescent NSCs also exhibit increased chromatin accessibility at genes involved in quiescence, a potential mechanism underlying deep quiescence during ageing98.”

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Authors
Maybury‐Lewis, S. Y., Brown, A. K., Yeary, M., Sloutskin, A., Dhakal, S., Juven‐Gershon, T., & Webb, A. E.
Affiliations
  • Brown University (US)
  • Bar-Ilan University (IL)
Corresponding author
Webb, Ashley E.
Venue
Aging Cell
Publisher
Wiley
Published
2021-10-23
Volume
20
Issue
11
Pages
e13499-e13499
ISSN
  • 1474-9718 (ISSN-L)
  • 1474-9726
OpenAlex
W3205245111
Cited by
27
References
77
Citations by year
2026: 5 · 2025: 4 · 2024: 5 · 2023: 7 · 2022: 4 · 2021: 1 · 2020: 1
FWCI
1.55
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Office of Extramural Research, National Institutes of Health (AG053288)
  • National Institute on Aging (5T32AG041688)
  • American Federation for Aging Research (Scholarship for Research on the Biology of Aging)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
neural stem cells, chromatin accessibility, stem cell quiescence, stem cell activation, transcriptional reprogramming, aging, enhancers, core promoter, gene repression, neurogenesis, stem cell metabolism
MeSH terms
Chromatin Immunoprecipitation Sequencing, RNA-Seq, Aging, Animals, Brain, Cell Cycle, Cell Differentiation, Cells, Cultured, Chromatin, Gene Expression Regulation, Histones, Promoter Regions, Genetic, Transcriptional Activation, Cellular Senescence, Cell Proliferation, Mice, Gene Regulatory Networks, Neurogenesis, Neural Stem Cells

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