Cited by 72Telomeres, Telomerase, and SenescenceHematopoietic Stem Cell TransplantationGenetics, Aging, and Longevity in Model Organisms

Hematopoietic stem cell ageing is uncoupled from p16INK4A-mediated senescence

Attema, J L, Pronk, C J H, Norddahl, G L, Nygren, J M, Bryder, D·2009·Oncogene

Abstract

Somatic stem cells are ultimately responsible for mediating appropriate organ homeostasis and have therefore been proposed to represent a cellular origin of the ageing process-a state often characterized by inappropriate homeostasis. Specifically, it has been suggested that ageing stem cells might succumb to replicative senescence by a mechanism involving the cyclin-dependent kinase inhibitor p16(INK4A). Here, we tested multiple functional and molecular parameters indicative of p16(INK4A) activity in primary aged murine hematopoietic stem cells (HSCs). We found no evidence that replicative senescence accompanies stem cell ageing in vivo, and in line with p16(INK4A) being a critical determinant of such processes, most aged HSCs (>99%) failed to express p16(INK4A) at the mRNA level. Moreover, whereas loss of epigenetically guided repression of the INK4A/ARF locus accompanied replicative senescent murine embryonic fibroblasts, such repression was maintained in aged stem cells. Taken together, these studies indicate that increased senescence as mediated by the p16(INK4A) tumor suppressor has only a minor function as an intrinsic regulator of steady-state HSC ageing in vivo.

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Crossref · 10.1038/onc.2009.94

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  • Certain laboratories could not find p16INK4a expression in freshly isolated HSCs from young or old mice.

    “Whether the impact of p16INK4a deficiency reflects a direct role in HSCs themselves remains somewhat controversial, however, as some groups have failed to detect p16INK4a expression in HSCs freshly isolated from young or aged mice129.”

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Authors
Attema, J. L., Pronk, C. J. H., Norddahl, G. L., Nygren, J. M., & Bryder, D.
Affiliations
Lund University (SE)
Corresponding author
Bryder, D
Venue
Oncogene
Published
2009-04-27
Volume
28
Issue
22
Pages
2238-2243
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W2001407037
Cited by
72
References
26
Citations by year
2025: 3 · 2023: 4 · 2022: 5 · 2021: 2 · 2020: 3 · 2019: 1 · 2018: 3 · 2017: 3 · 2016: 5 · 2015: 6 · 2014: 12 · 2013: 7 · 2012: 6
FWCI
3.98
Type
journal article
Language
en
Open access
closed
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
  • Fondation pour la Recherche Médicale
  • Crafoordska Stiftelsen
  • Vetenskapsrådet
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
hematopoietic stem cells, stem cell aging, replicative senescence, p16INK4a, INK4a/ARF locus, epigenetic repression, tumour suppressor, embryonic fibroblasts
MeSH terms
Animals, Cell Line, DNA, Hematopoietic Stem Cells, Histones, Methylation, Promoter Regions, Genetic, Up-Regulation, Cellular Senescence, Cyclin-Dependent Kinase Inhibitor p16, Epigenesis, Genetic, Cell Proliferation, Mice

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