Cited by 87Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsCancer-related Molecular Pathways

Mdm2–p53 signaling regulates epidermal stem cell senescence and premature aging phenotypes in mouse skin

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Gannon, Hugh S., Donehower, Lawrence A., Lyle, Stephen, Jones, Stephen N.·2011·Developmental Biology

Abstract

The p53 transcription factor is activated by various types of cell stress or DNA damage and induces the expression of genes that control cell growth and inhibit tumor formation. Analysis of mice that express mutant forms of p53 suggest that inappropriate p53 activation can alter tissue homeostasis and life span, connecting p53 tumor suppressor functions with accelerated aging. However, other mouse models that display increased levels of wildtype p53 in various tissues fail to corroborate a link between p53 and aging phenotypes, possibly due to the retention of signaling pathways that negatively regulate p53 activity in these models. In this present study, we have generated mice lacking Mdm2 in the epidermis. Deletion of Mdm2, the chief negative regulator of p53, induced an aging phenotype in the skin of mice, including thinning of the epidermis, reduced wound healing, and a progressive loss of fur. These phenotypes arise due to an induction of p53-mediated senescence in epidermal stem cells and a gradual loss of epidermal stem cell function. These results reveal that activation of endogenous p53 by ablation of Mdm2 can induce accelerated aging phenotypes in mice.

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Crossref · 10.1016/j.ydbio.2011.02.007

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Authors
Gannon, H. S., Donehower, L. A., Lyle, S., & Jones, S. N.
Affiliations
  • University of Massachusetts Chan Medical School (US)
  • Baylor College of Medicine (US)
Corresponding author
Jones, Stephen N.
Venue
Developmental Biology
Publisher
Elsevier BV
Published
2011-05
Volume
353
Issue
1
Pages
1-9
ISSN
0012-1606 (ISSN-L)
OpenAlex
W1996846864
Cited by
87
References
44
Citations by year
2026: 4 · 2025: 6 · 2024: 5 · 2023: 4 · 2022: 7 · 2021: 5 · 2020: 2 · 2019: 7 · 2018: 3 · 2017: 7 · 2016: 8 · 2015: 3 · 2014: 8 · 2013: 8 · 2012: 8
FWCI
5.68
Type
journal article
Language
en
Open access
Locations
  • Developmental Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship@UMassChan (submittedVersion)
Funders
  • NIDDK (DK32520)
  • National Cancer Institute (CA077735)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
MDM2, p53, epidermal stem cells, cellular senescence, premature aging, skin aging, epidermal thinning, wound healing, p53 tumor suppressor, tissue homeostasis
MeSH terms
Epidermal Cells, Animals, Phenotype, Stem Cells, Signal Transduction, Skin Aging, Tumor Suppressor Protein p53, Cellular Senescence, Cyclin-Dependent Kinase Inhibitor p16, Mice, Proto-Oncogene Proteins c-mdm2

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