Cited by 298Telomeres, Telomerase, and SenescenceMicrotubule and mitosis dynamicsCancer-related Molecular Pathways

Persistent Telomere Damage Induces Bypass of Mitosis and Tetraploidy

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Davoli, Teresa, Denchi, Eros Lazzerini, de Lange, Titia·2010·Cell

Abstract

Tetraploidization has been proposed as an intermediate step toward aneuploidy in human cancer but a general mechanism for the induction of tetraploidy during tumorigenesis is lacking. We report that tetraploidization occurs in p53-deficient cells experiencing a prolonged DNA damage signal due to persistent telomere dysfunction. Live-cell imaging revealed that these cells have an extended G2 due to ATM/ATR- and Chk1/Chk2-mediated inhibition of Cdk1/CyclinB and eventually bypass mitosis. Despite their lack of mitosis, the cells showed APC/Cdh1-dependent degradation of the replication inhibitor geminin, followed by accumulation of Cdt1, which is required for origin licensing. Cells then entered a second S phase resulting in whole-genome reduplication and tetraploidy. Upon restoration of telomere protection, these tetraploid cells resumed cell division cycles and proliferated. These observations suggest a general mechanism for the induction of tetraploidization in the early stages of tumorigenesis when telomere dysfunction can result from excessive telomere shortening.

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Crossref · 10.1016/j.cell.2010.01.031

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  • The repertoire of genomic alterations attributable to telomere crisis is more extensive and includes whole-genome reduplication, chromothripsis, and kataegis.

    “However, it has recently become clear that the repertoire of genomic alterations that can be ascribed to telomere crisis is more extensive and includes whole-genome reduplication, chromothripsis and kataegis3,8,9.”
  • Telomere crisis can induce tetraploidization.

    “Finally, telomere crisis can induce tetraploidization (doubling the set of chromosomes)8,9, which is inferred to be a frequent event during the development of human cancers125.”
  • Tetraploidization can be induced in cells lacking p53 and RB pathways that have a high load of dysfunctional telomeres.

    “Tetraploidization can be induced in cells that lack the p53 and RB pathways, which have a high load of dysfunctional telomeres8,9 (FIG. 6).”
  • In p53/pRb-deficient MEFs, persistent telomere dysfunction causes prolonged G2 arrest and genome reduplication/tetraploidy because the p53/p21-dependent G1/S checkpoint is absent.

    “Conversely, in p53/pRb-deficient MEFs, DNA damage generated by persistent telomere dysfunction induces prolonged G2 arrest that leads to genome reduplication and tetraploidy due to the absence of the p53/p21-dependent G1/S checkpoint (Fig. 3; 88 ).”

    From Senescence from G2 arrest, revisited (2015) · cites this paper as [88]

  • Strong persistent DNA damage signaling from POT1a/b double knockdown likely causes sustained Chk1/2 activation that prevents Cdk1 activation and mitosis, producing prolonged G2 arrest that enables mitotic bypass and a new replication round.

    “The most likely explanation is that the strong and persistent DNA damage signaling induced by POT1a/b double knockdown 88 causes sustained Chk1/2 activation that prevents Cdk1 activation (and mitosis), resulting in prolonged G2 arrest.This would enable the mitotic bypass and the onset of a new round of replication (Fig. 3).”

    From Senescence from G2 arrest, revisited (2015) · cites this paper as [88]

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  1. Peters JM The anaphase-promoting complex: proteolysis in mitosis and beyond Mol Cell 2002 9 931 943 12049731

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Authors
Davoli, T., Denchi, E. L., & de Lange, T.
Affiliations
Rockefeller University (US)
Venue
Cell
Publisher
Elsevier BV
Published
2010-04
Volume
141
Issue
1
Pages
81-93
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2025088179
Cited by
298
References
53
Citations by year
2026: 7 · 2025: 9 · 2024: 19 · 2023: 16 · 2022: 9 · 2021: 14 · 2020: 17 · 2019: 8 · 2018: 23 · 2017: 20 · 2016: 24 · 2015: 25 · 2014: 17 · 2013: 28 · 2012: 33
FWCI
19.50
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (DP1OD000379)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
tetraploidization, telomere dysfunction, telomere shortening, p53 deficiency, aneuploidy, carcinogenesis, G2 cell cycle arrest, ATM/ATR signaling, APC/Cdh1, Cdt1, telomere protection
MeSH terms
Aneuploidy, Animals, Cell Line, DNA Damage, Embryo, Mammalian, Humans, Mitosis, Neoplasms, Ploidies, Cadherins, Telomere, Cell Cycle Proteins, Ubiquitin-Protein Ligase Complexes, Mice, Anaphase-Promoting Complex-Cyclosome

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