Cited by 413Cancer-related Molecular PathwaysTelomeres, Telomerase, and SenescenceRetinal Development and Disorders

Ablation of the Retinoblastoma gene family deregulates G1 control causing immortalization and increased cell turnover under growth-restricting conditions

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Dannenberg, Jan-Hermen, van Rossum, Agnes, Schuijff, Leontine, te Riele, Hein·2000·Genes & Development

Abstract

The retinoblastoma suppressor pRB belongs to the family of so-called pocket proteins, which also includes p107 and p130. These proteins may functionally overlap in cell cycle control and tumor suppression. We have generated an isogenic set of embryonic stem (ES) cell lines carrying single or compound loss-of-function mutations in the Rb gene family, including a cell line completely devoid of all three pocket proteins. None of the knockout combinations affected the growth characteristics of ES cells; however, concomitant ablation of all three pocket proteins strongly impaired their differentiation capacity. For the generated genotypes, primary mouse embryonic fibroblasts (MEFs) also were obtained. While inactivation of Rb alone did not alleviate the senescence response of MEFs, pRB/p107-deficient MEFs, after having adapted to in vitro culturing, continued to proliferate at modest rate. Additional ablation of p130 rendered MEFs completely insensitive to senescence-inducing signals and strongly increased their proliferation rate. Although triple-knockout MEFs retained anchorage dependence, they lacked proper G 1 control and showed increased cell turnover under growth-inhibiting conditions.

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  • In ES cells, ablation of RB, p107, and p130 impairs differentiation and increases cell turnover under growth arrest.

    “In ES cells, ablation of all three RB family members (RB, p107 and p130) results in impaired differentiation and an increase in cell turnover under growth arrest conditions69.”

    From Molecular regulation of stem cell quiescence (2013) · cites this paper as [69]

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Authors
Dannenberg, J.-H., van Rossum, A., Schuijff, L., & te Riele, H.
Affiliations
The Netherlands Cancer Institute (NL)
Venue
Genes & Development
Published
2000-12-01
Volume
14
Issue
23
Pages
3051-3064
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2001004678
Cited by
413
References
96
Citations by year
2026: 1 · 2025: 1 · 2024: 5 · 2023: 8 · 2022: 6 · 2021: 8 · 2020: 12 · 2019: 3 · 2018: 12 · 2017: 8 · 2016: 9 · 2015: 10 · 2014: 11 · 2013: 21 · 2012: 17
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
Keywords
retinoblastoma protein, p107, p130, pocket proteins, cellular senescence, cell immortalization, cell turnover, embryonic stem cells, mouse embryonic fibroblasts, differentiation capacity, loss-of-function mutations, tumor suppression
MeSH terms
Animals, Cell Adhesion, Cell Differentiation, Cell Division, Cell Line, Mice, Inbred C57BL, Mice, Nude, Nuclear Proteins, Phosphoproteins, Proteins, Stem Cells, Tumor Suppressor Protein p53, Retinoblastoma Protein, G1 Phase, Teratocarcinoma, Mice, Knockout, Tumor Suppressor Protein p14ARF, Retinoblastoma-Like Protein p130, Retinoblastoma-Like Protein p107, Mice

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