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Updated: Jun 11, 2026
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Assessment of Cellular Bioenergetics in Mouse Hematopoietic Stem and Primitive Progenitor Cells using the Extracellular Flux Analyzer
Published on: September 24, 2021
Aging hematopoietic stem cells decline in function and exhibit epigenetic dysregulation
Stuart M Chambers1, Chad A Shaw, Catherine Gatza
1Program for Cell and Molecular Biology, Baylor College of Medicine, Houston, Texas, United States of America.
Plos Biology
|August 7, 2007
Summary
Stem cell aging impairs tissue repair and shortens lifespan. Loss of epigenetic regulation in hematopoietic stem cells drives functional decline and increases cancer risk.
Area of Science:
- Gerontology
- Stem Cell Biology
- Epigenetics
Background:
- Stem cell aging contributes to organismal aging and disease.
- Hematopoietic stem cells (HSCs) are crucial for blood and immune system maintenance.
- Age-related functional decline in HSCs impacts tissue homeostasis.
Purpose of the Study:
- To investigate age-related changes in HSC function and gene expression.
- To identify molecular mechanisms underlying HSC aging.
- To explore the relationship between HSC aging and organismal aging.
Main Methods:
- Purification and functional assessment of HSCs from aged mice.
- Genome-wide gene expression analysis (microarray).
- Analysis of epigenetic regulation and chromatin structure.
Main Results:
- HSCs increase in number but show functional deficits with age.
- Significant age-induced and age-repressed gene expression profiles were identified.
- Genes related to stress, inflammation, and protein aggregation were upregulated; genomic integrity genes were downregulated.
- Loss of transcriptional regulation and epigenetic control was observed.
- HSC aging can be dissociated from organismal aging.
Conclusions:
- HSCs are susceptible to aging, driven by epigenetic dysregulation.
- Epigenetic alterations in HSCs contribute to functional decline and increased neoplastic transformation risk.
- Targeting epigenetic mechanisms may offer therapeutic strategies for age-related stem cell dysfunction.
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