Cited by 71Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsDNA Repair Mechanisms

Transcriptional repression of DNA repair genes is a hallmark and a cause of cellular senescence

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Collin, Guillaume, Huna, Anda, Warnier, Marine, Flaman, Jean-Michel, Bernard, David·2018·Cell Death & Disease

Abstract

Cellular senescence response is (i) activated by numerous stresses, (ii) is characterized by a stable proliferation arrest, and (iii) by a set of specific features. Timely regulated senescence is thought to be beneficial, whereas chronic senescence such as during normal or premature aging is deleterious as it favors most, if not all, age-related diseases. In this study, using in-house or publicly available microarray analyses of transcriptomes of senescent cells, as well as analyses of the level of expression of several DNA repair genes by RT-qPCR and immunoblot, we show that repression of DNA repair gene expression is associated with cellular senescence. This repression is mediated by the RB/E2F pathway and it may play a causal role in senescence induction, as single DNA repair gene repression by siRNA induced features of premature senescence. Importantly, activating RB independently of direct DNA damage also results in repression of DNA repair genes and in the subsequent induction of DNA damage and senescence. The dogma is that DNA damage observed during cellular senescence is directly provoked by DNA lesions following genotoxic attack (UV, IR, and ROS) or by induction of replicative stress upon oncogenic activation. Our in vitro results support a largely unsuspected contribution of the loss of DNA repair gene expression in the induction and the accumulation of the DNA damage observed in most, if not all, kinds of cellular senescence, and thus in the induction of cellular senescence. Further demonstration using in vivo models will help to generalize our findings.

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Authors
Collin, G., Huna, A., Warnier, M., Flaman, J.-M., & Bernard, D.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Bernard, David
Venue
Cell Death & Disease
Published
2018-02-15
Volume
9
Issue
3
Pages
259-259
ISSN
2041-4889 (ISSN-L)
OpenAlex
W2790950086
Cited by
71
References
50
Citations by year
2026: 3 · 2025: 10 · 2024: 9 · 2023: 5 · 2022: 15 · 2021: 8 · 2020: 8 · 2019: 10 · 2018: 3
FWCI
4.99
Type
journal article
Language
en
Open access
Locations
  • Cell Death and Disease (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Agence Nationale de la Recherche (ANR-14-CE12-0003)
  • Fondation pour la Recherche Médicale
  • Fondation ARC pour la Recherche sur le Cancer
  • Ligue Contre le Cancer
  • Fondation de France
  • Institut National Du Cancer
  • National Cancer Institute
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
cellular senescence, DNA repair genes, transcriptional repression, Rb/E2F pathway, RB1, premature senescence, DNA damage, senescence-associated DNA damage, aging, age-related diseases, siRNA knockdown
MeSH terms
Cells, Cultured, DNA Repair, Epithelial Cells, Humans, Transcription, Genetic, Signal Transduction, Down-Regulation, Tumor Suppressor Protein p53, Retinoblastoma Protein, Cellular Senescence, Mammary Glands, Human, DNA Repair Enzymes, E2F Transcription Factors

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