Cited by 582Cancer-related Molecular PathwaysTelomeres, Telomerase, and SenescenceProtein Kinase Regulation and GTPase Signaling

Targeted disruption of the three Rb-related genes leads to loss of G 1 control and immortalization

Open access
Sage, Julien, Mulligan, George J., Attardi, Laura D., Miller, Abigail, Chen, SiQi, Williams, Bart, Theodorou, Elias, Jacks, Tyler·2000·Genes & Development

Abstract

The retinoblastoma protein, pRB, and the closely related proteins p107 and p130 are important regulators of the mammalian cell cycle. Biochemical and genetic studies have demonstrated overlapping as well as distinct functions for the three proteins in cell cycle control and mouse development. However, the role of the pRB family as a whole in the regulation of cell proliferation, cell death, or cell differentiation is not known. We generated embryonic stem (ES) cells and other cell types mutant for all three genes. Triple knock-out mouse embryonic fibroblasts (TKO MEFs) had a shorter cell cycle than wild-type, single, or double knock-out control cells. TKO cells were resistant to G 1 arrest following DNA damage, despite retaining functional p53 activity. They were also insensitive to G 1 arrest signals following contact inhibition or serum starvation. Finally, TKO MEFs did not undergo senescence in culture and do possess some characteristics of transformed cells. Our results confirm the essential role of the Rb family in the control of the G 1 /S transition, place the three Rb family members downstream of multiple cell cycle control pathways, and further the link between loss of cell cycle control and tumorigenesis.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1101/gad.843200

Cites

12 of 12 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Inactivation of Tp53, the genes encoding either one of the three Rb family members or Suv39h1 in already senescent cells enables cell cycle re-entry out of the terminal arrest condition.

    “Conversely, inactivation of Tp53 , the genes encoding either one of the three Rb family members or Suv39h1 in already senescent cells enables cell cycle re- entry out of the terminal arrest condition 5,125,126 .”

    From Senescence and cancer — role and therapeutic opportunities (2022) · cites this paper as [126]

    The Abstract and “Convergence of growth arrest signals on the Rb family” (page not provided) report that mouse embryonic fibroblasts lacking all three Rb-family genes fail to undergo senescence or arrest in G1. They do not show that inactivating any one Rb-family gene in already senescent cells causes cell-cycle re-entry. The cited passages also do not establish that result for Tp53 or Suv39h1. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Genetic interference with senescence-essential factors, especially using inducible systems, underscored that, similar to other biological states, senescence is not necessarily irreversible.

    “Of note, genetic interference with senescence- essential factors, especially using inducible systems, underscored that, similar to other biological states, senescence is not necessarily irreversible 125,126,149 .”

    From Senescence and cancer — role and therapeutic opportunities (2022) · cites this paper as [126]

    The “TKO MEFs are immortal” section reports that genetic loss of all three pRB-family genes allowed mouse embryonic fibroblasts to bypass senescence. It does not describe an inducible system or show that cells already in senescence resumed proliferation; bypassing senescence does not establish its reversibility. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Mouse embryonic fibroblasts lacking p53 but not Ink4a (p16) or RB escape Ras-induced senescence.

    “For example, mouse embryonic fibroblasts (MEFs) lacking p53 [72] but not Ink4a (p16) or RB [73,74,75] escape Ras-induced senescence.”

    From Mechanisms and Regulation of Cellular Senescence (2021) · cites this paper as [73]

  • RB family members have redundant activity in repressing replication genes during quiescence.

    “Conversely, RB family members have redundant activity in repressing these genes during quiescence [73].”

    From Mechanisms and Regulation of Cellular Senescence (2021) · cites this paper as [73]

  • The RB proteins have redundant and/or compensatory functions.

    “There is ample evidence that the RB proteins have redundant and/or compensatory functions (Sage et al., 2000).”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 7

  1. Demers, G.W., Foster, S.A., Halbert, C.L., and Galloway, D.A. 1994. Growth arrest by induction of p53 in DNA damaged keratinocytes is bypassed by human papillomavirus 16 E7. Proc. Natl. Acad. Sci. 91: 4382-4386.
  2. Harrington, E.A., Bruce, J.L., Harlow, E., and Dyson, N. 1998. pRB plays an essential role in cell cycle arrest induced by DNA damage. Proc. Natl. Acad. Sci. 95: 11945-11950.
  3. Medema, R.H., Herrera, R.E., Lam, E., and Weinberg, R.A. 1995. Growth suppression by p16ink4 requires functional retino- blastoma protein. Proc. Natl. Acad. Sci. 92: 6289-6293.
  4. Samuelson, A.V. and Lowe, S.W. 1997. Selective induction of p53 and chemosensitivity in RB-deficient cells by E1A mu- tants unable to bind the RB-related proteins. Proc. Natl. Acad. Sci. 94: 12094-12099.
  5. Slebos, R.J., Lee, M.H., Plunkett, B.S., Kessis, T.D., Williams, B.O., Jacks, T. Hedrick, L., Kastan, M.B., and Cho, K.R. 1994. p53-dependent G 1 arrest involves pRB-related proteins and is disrupted by the human papillomavirus 16 E7 oncoprotein. Proc. Natl. Acad. Sci. 91: 5320-5324.
  6. Smith-McCune, K., Kalman, D., Robbins, C., Shivakumar, S., Yuschenkoff, L., and Bishop, J.M. 1999. Intranuclear local- ization of human papillomavirus 16 E7 during transforma- tion and preferential binding of E7 to the Rb family member p130. Proc. Natl. Acad. Sci. 96: 6999-7004.
  7. Stein, G.H. and Dulic, V. 1998. Molecular mechanisms for the senescent cell cycle arrest. J. Investig. Dermatol. Symp. Proc. 3: 14-18.

Cited by

Sorted by citations

Authors
Sage, J., Mulligan, G. J., Attardi, L. D., Miller, A., Chen, S., Williams, B., Theodorou, E., & Jacks, T.
Affiliations
Howard Hughes Medical Institute (US)
Venue
Genes & Development
Published
2000-12-01
Volume
14
Issue
23
Pages
3037-3050
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2104775085
Cited by
582
References
12
Citations by year
2026: 4 · 2025: 5 · 2024: 7 · 2023: 8 · 2022: 12 · 2021: 12 · 2020: 11 · 2019: 7 · 2018: 15 · 2017: 12 · 2016: 11 · 2015: 15 · 2014: 13 · 2013: 22 · 2012: 26
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Cancer Institute
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 › Protein Kinase Regulation and GTPase Signaling
Keywords
retinoblastoma protein, p107, p130, G1/S transition, G1 cell cycle arrest, cell cycle regulation, cell immortalization, senescence, DNA damage resistance, contact inhibition, serum deprivation, p53, carcinogenesis, embryonic stem cells
MeSH terms
Animals, Cell Cycle, Cell Division, Cell Survival, Cell Transformation, Neoplastic, Cells, Cultured, DNA Damage, Doxorubicin, Mice, Inbred C57BL, Nuclear Proteins, Phosphoproteins, Proteins, Genes, ras, Retinoblastoma Protein, G1 Phase, Culture Media, Serum-Free, Mice, Knockout, Gene Targeting, Retinoblastoma-Like Protein p130, Retinoblastoma-Like Protein p107, Mice

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review