Cited by 851Telomeres, Telomerase, and SenescenceDNA Repair MechanismsGenetics, Aging, and Longevity in Model Organisms

Telomeric DNA damage is irreparable and causes persistent DNA-damage-response activation

Open access
Fumagalli, Marzia, Rossiello, Francesca, Clerici, Michela, Barozzi, Sara, Cittaro, Davide, Kaplunov, Jessica M., Bucci, Gabriele, Dobreva, Miryana +5 more·2012·Nature Cell Biology

Abstract

The DNA-damage response (DDR) arrests cell-cycle progression until damage is removed. DNA-damage-induced cellular senescence is associated with persistent DDR. The molecular bases that distinguish transient from persistent DDR are unknown. Here we show that a large fraction of exogenously induced persistent DDR markers is associated with telomeric DNA in cultured cells and mammalian tissues. In yeast, a chromosomal DNA double-strand break next to a telomeric sequence resists repair and impairs DNA ligase 4 recruitment. In mammalian cells, ectopic localization of telomeric factor TRF2 next to a double-strand break induces persistent DNA damage and DDR. Linear, but not circular, telomeric DNA or scrambled DNA induces a prolonged checkpoint in normal cells. In terminally differentiated tissues of old primates, DDR markers accumulate at telomeres that are not critically short. We propose that linear genomes are not uniformly reparable and that telomeric DNA tracts, if damaged, are irreparable and trigger persistent DDR and cellular senescence.

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Crossref · 10.1038/ncb2466

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  • Ageing is consistently associated with increased DNA damage response in proliferating and non-proliferating cells, contributing to senescent cell accumulation with age.

    “Ageing is one of the factors that is consistently associated with an increase in DDR in proliferating and non-proliferating cells, thus contributing significantly to the accumulation of senescent cells with age35,89”

    From Cellular senescence in ageing: from mechanisms to therapeutic opportunities (2021) · cites this paper as [35]

    The Abstract reports more DDR-positive cells with age across tissues and cell types, and the Results section on physiological ageing in primates reports persistent DDR foci in non-dividing neurons and hepatocytes. The Discussion proposes that persistent telomeric DDR leads to senescence, but does not establish that increased DDR contributes significantly to the accumulation of senescent cells with age. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Aged mouse hepatocytes show senescence-associated markers including SA-β-gal activity, TAF, karyomegaly, SADS, LINE-1 expression and SASP factors.

    “Studies on aged mouse hepatocytes have shown the presence of senescence-associated markers such as SA-β-gal activity157, TAF54,158, karyomegaly and SADS159, LINE-1 expression23 and expression of SASP factors141.”

    From SenNet recommendations for detecting senescent cells in different tissues (2024) · cites this paper as [158]

    The Results section on physiological ageing in primates reports telomere-associated DNA-damage foci in liver hepatocytes from old baboons, supporting the TAF portion of the citation. It does not establish TAF in aged mouse hepatocytes; its mouse experiment examined irradiated hippocampal neurons. The other listed markers have separate citations and are not attributed to this source. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Dysfunctional telomeres trigger a DNA damage response but block attempted DNA repair.

    “Dysfunctional telomeres elicit a DNA damage response (DDR) but suppress attempted DNA repair (22–25).”

    From Aging, Cellular Senescence, and Cancer (2013) · cites this paper as [24]

  • Dysfunctional telomeres appear irreparable, so cells with them have persistent DDR signaling and p53 activation that enforce senescence arrest.

    “Dysfunctional telomeres appear to be irreparable; consequently, cells with such telomeres experience persistent DDR signaling and p53 activation (24, 26), which enforce the senescence growth arrest (Figure 2).”

    From Aging, Cellular Senescence, and Cancer (2013) · cites this paper as [24]

  • Telomere-binding proteins inhibit DNA repair in cis to maintain linear chromosome structure and prevent fusions.

    “These observations can be explained by an evolutionary perspective by which telomere-binding proteins inhibit DNA repair in cis18,19 to maintain the linear structure of chromosomes and to prevent fusions.”

    From Telomere dysfunction in ageing and age-related diseases (2022) · cites this paper as [19]

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Authors
Fumagalli, M., Rossiello, F., Clerici, M., Barozzi, S., Cittaro, D., Kaplunov, J. M., Bucci, G., Dobreva, M., Matti, V., Beausejour, C. M., Herbig, U., Longhese, M. P., & d’Adda di Fagagna, F.
Affiliations
  • IFOM (IT)
  • University of Milano-Bicocca (IT)
  • European Institute of Oncology (IT)
  • Italian Institute of Technology (IT)
  • Rutgers New Jersey Medical School (US)
  • Centre Hospitalier Universitaire Sainte-Justine (CA)
Venue
Nature Cell Biology
Published
2012-03-18
Volume
14
Issue
4
Pages
355-365
ISSN
  • 1465-7392 (ISSN-L)
  • 1476-4679
OpenAlex
W2046466087
Cited by
851
References
55
Citations by year
2026: 44 · 2025: 51 · 2024: 57 · 2023: 66 · 2022: 80 · 2021: 85 · 2020: 68 · 2019: 56 · 2018: 49 · 2017: 55 · 2016: 51 · 2015: 64 · 2014: 51 · 2013: 50 · 2012: 24
FWCI
40.53
Type
journal article
Language
en
Update notices
erratum (2012-05-02)
Open access
Locations
  • Nature Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • BOA (University of Milano-Bicocca) (submittedVersion)
Funders
  • Canadian Institutes of Health Research (IAO-79317)
  • National Cancer Institute (R01CA136533)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
telomeric DNA, DNA damage response, cellular senescence, TRF2, DNA double-strand break repair, DNA damage foci, telomere length, aging
MeSH terms
Animals, Cell Cycle, Cells, Cultured, DNA Damage, Fibroblasts, HeLa Cells, Humans, Neurons, Telomere, Telomeric Repeat Binding Protein 2, Mice

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