PreprintCited by 293Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsCancer-related Molecular Pathways

Senescence, aging, and malignant transformation mediated by p53 in mice lacking the Brca1 full-length isoform

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Cao, Liu, Li, Wenmei, Kim, Sangsoo, Brodie, Steven G., Deng, Chu-Xia·2003·Genes & Development

Abstract

Senescence may function as a two-edged sword that brings unexpected consequences to organisms. Here we provide evidence to support this theory by showing that the absence of the Brca1 full-length isoform causes senescence in mutant embryos and cultured cells as well as aging and tumorigenesis in adult mice. Haploid loss of p53 overcame embryonic senescence but failed to prevent the adult mutant mice from prematurely aging, which included decreased life span, reduced body fat deposition, osteoporosis, skin atrophy, and decreased wound healing. We further demonstrate that mutant cells that escaped senescence had undergone clonal selection for faster proliferation and extensive genetic/molecular alterations, including overexpression of cyclin D1 and cyclin A and loss of p53. These observations provide the first in vivo evidence that links cell senescence to aging due to impaired function of Brca1 at the expense of tumorigenesis.

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  • Mice that express two copies of a hypomorphic Brca1 allele along with only one copy of the gene for p53 (Trp53+/-) survive but show marked progeroid symptoms.

    “mice that express two copies of a hypomorphic Brca1 allele along with only one copy of the gene for p53 ( Trp53 +/- ) survive but show marked progeroid symptoms 35”

    From The common biology of cancer and ageing (2007) · cites this paper as [35]

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  1. Chuttani, A. and Gilchrest, B.A. 1995. Aging. In Handbook of physiology (ed. E.J. Masoro), Section 11, pp. 309-324. Oxford Univ. Press, New York.

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Authors
Cao, L., Li, W., Kim, S., Brodie, S. G., & Deng, C.-X.
Affiliations
National Institutes of Health (US)
Venue
Genes & Development
Published
2003-01-15
Volume
17
Issue
2
Pages
201-213
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2087849372
Cited by
293
References
64
Citations by year
2026: 5 · 2025: 4 · 2024: 11 · 2023: 8 · 2022: 6 · 2021: 12 · 2020: 10 · 2019: 9 · 2018: 11 · 2017: 12 · 2016: 16 · 2015: 6 · 2014: 14 · 2013: 20 · 2012: 21
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
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
cellular senescence, aging, BRCA1, p53, malignant transformation, carcinogenesis, premature aging, clonal selection, cyclin D1, cyclin A, osteoporosis, skin atrophy, wound healing, lifespan, fat deposition, mouse model
MeSH terms
Aging, Animals, Female, Haploidy, Male, Mice, Mutant Strains, Neoplasms, Experimental, Phenotype, Genes, p53, Cellular Senescence, BRCA1 Protein, Genes, BRCA1, Aging, Premature, Protein Isoforms, Mice

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