Cited by 538Cancer-related Molecular PathwaysTelomeres, Telomerase, and SenescenceOcular Oncology and Treatments

Acute mutation of retinoblastoma gene function is sufficient for cell cycle re-entry

Sage, Julien, Miller, Abigail L., Pérez-Mancera, Pedro A., Wysocki, Julianne M., Jacks, Tyler·2003·Nature

Abstract

Cancer cells arise from normal cells through the acquisition of a series of mutations in oncogenes and tumour suppressor genes. Mouse models of human cancer often rely on germline alterations that activate or inactivate genes of interest. One limitation of this approach is that germline mutations might have effects other than somatic mutations, owing to developmental compensation. To model sporadic cancers associated with inactivation of the retinoblastoma (RB) tumour suppressor gene in humans, we have produced a conditional allele of the mouse Rb gene. We show here that acute loss of Rb in primary quiescent cells is sufficient for cell cycle entry and has phenotypic consequences different from germline loss of Rb function. This difference is explained in part by functional compensation by the Rb-related gene p107. We also show that acute loss of Rb in senescent cells leads to reversal of the cellular senescence programme. Thus, the use of conditional knockout strategies might refine our understanding of gene function and help to model human cancer more accurately.

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Crossref · 10.1038/nature01764

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  • In contrast to the senescence arrest of human fibroblasts, the senescence arrest of murine fibroblasts can be reversed by inactivating pRB.

    “These mechanisms may explain another difference between rodent and human cells: in contrast to the senescence arrest of human fibroblasts (Beausejour et al., 2003), the senescence arrest of murine fibroblasts can be reversed by inactivating pRB (Sage et al., 2003).”
  • RAS-induced senescent cells can resume cell proliferation upon acute inactivation of all three Rb family proteins.

    “Indeed, a previous report showed that RAS-induced senescent cells can resume cell proliferation upon acute inactivation of all three Rb family proteins [40].”
  • Cellular senescence can be reversible upon abrogation of the Rb or p53 pathways.

    “As noted, cellular senescence can be reversible upon abrogation of the Rb or p53 pathways [40,41];”
  • Acute inactivation of RB is sufficient to promote proliferation in senescent mouse embryo fibroblasts.

    “acute inactivation of RB is sufficient to promote proliferation in senescent mouse embryo fibroblasts (MEFs) (Sage et al., 2003)”
  • Mouse embryo fibroblast studies show that acute Rb ablation in quiescent cells leads to S phase entry and proliferation (Sage et al., 2003).

    “In contrast, studies using mouse embryo fibroblasts show that acute ablation of Rb in quiescent cells leads to S phase entry and proliferation (Sage et al., 2003).”

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Authors
Sage, J., Miller, A. L., Pérez-Mancera, P. A., Wysocki, J. M., & Jacks, T.
Affiliations
  • Universidad de Salamanca (ES)
  • Massachusetts Institute of Technology (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Jacks, Tyler
Venue
Nature
Published
2003-07
Volume
424
Issue
6945
Pages
223-228
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2034962229
Cited by
538
References
7
Citations by year
2026: 6 · 2025: 7 · 2024: 8 · 2023: 11 · 2022: 12 · 2021: 16 · 2020: 14 · 2019: 14 · 2018: 19 · 2017: 11 · 2016: 19 · 2015: 23 · 2014: 18 · 2013: 18 · 2012: 30
FWCI
22.57
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
Funders
National Institutes of Health
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Ophthalmology › Ocular Oncology and Treatments
Keywords
retinoblastoma gene, Rb, conditional knockout, cell cycle re-entry, quiescent cells, p107, cellular senescence, senescence reversal, tumor suppressor inactivation, developmental compensation, mouse tumor model
MeSH terms
Animals, Cell Cycle, Cell Line, Disease Models, Animal, Humans, Mice, Inbred C57BL, Nuclear Proteins, Genes, Retinoblastoma, Cyclins, Cellular Senescence, Gene Deletion, Germ-Line Mutation, Gene Targeting, Cyclin-Dependent Kinase Inhibitor p16, Retinoblastoma-Like Protein p107, Cyclin-Dependent Kinase Inhibitor p21, Mice

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