Cited by 100Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsTGF-β signaling in diseases

Smurf2 up-regulation activates telomere-dependent senescence

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Zhang, Hong, Cohen, Stanley N.·2004·Genes & Development

Abstract

Progressive telomere shortening activates replicative senescence, which prevents somatic cells from being propagated indefinitely in culture. The limitation of proliferative capacity imposed by replicative senescence is thought to contribute to both organismal aging and the prevention of tumor development. Here we report that up-regulation of Smurf2, an E3 ubiquitin ligase previously implicated in TGF-β signaling, is a specific consequence of telomere attrition in human fibroblasts and that such up-regulation is sufficient to produce the senescence phenotype. Adventitious production of the Smurf2 protein in early passage fibroblasts at the same physiological level observed during telomere-mediated senescence resulted in proliferative arrest in a viable state, morphological and biochemical alterations characteristic of senescence, acquisition of senescence-specific alterations in gene expression, and reversal of cellular immortalization by telomerase. We show that the senescence-inducing actions of Smurf2 occur in the absence of detectable DNA damage or stress response, that Smurf2's effects require a novel function distinct from its E3 activity, that Smurf2 recruits the Rb and p53 pathways for senescence induction, and that while p21 is elevated by Smurf2, Smurf2-mediated senescence is independent of p21. Smurf2 is the first gene found to be both up-regulated by telomere attrition and sufficient to induce senescence.

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  • Chronic signaling by anti-proliferative cytokines increases cellular oxidative stress and potentiates senescence.

    “This includes chronic signaling by anti-proliferative cytokines that increase cellular oxidative stress and potentiate senescence”

    From Redox control of senescence and age-related disease. (2017) · cites this paper as [59]

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  1. Chang, B.D., Watanabe, K., Broude, E.V., Fang, J., Poole, J.C., Kalinichenko, T.V., and Roninson, I.B. 2000. Effects of p21Waf1/Cip1/Sdi1 on cellular gene expression: Implica- tions for carcinogenesis, senescence, and age-related dis- eases. Proc. Natl. Acad. Sci. 97: 4291-4296.

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Authors
Zhang, H., & Cohen, S. N.
Affiliations
Stanford Medicine (US)
Venue
Genes & Development
Published
2004-12-01
Volume
18
Issue
24
Pages
3028-3040
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2147934454
Cited by
100
References
66
Citations by year
2024: 1 · 2023: 4 · 2022: 1 · 2021: 3 · 2020: 3 · 2019: 5 · 2018: 5 · 2017: 4 · 2016: 2 · 2015: 3 · 2014: 14 · 2013: 7 · 2012: 7
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship@UMassChan (submittedVersion)
Funders
  • Ellison Medical Foundation
  • National Foundation for Cancer Research
  • California Breast Cancer Research Program
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 › TGF-β signaling in diseases
Keywords
Smurf2, telomere shortening, replicative senescence, E3 ubiquitin ligase, human fibroblasts, telomerase, cell immortalization, p53 pathway, Rb pathway, p21, senescence-associated gene expression, aging, tumor suppression
MeSH terms
Cell Line, Fibroblasts, Fluorescent Antibody Technique, Genetic Vectors, Humans, Plasmids, Blotting, Northern, Blotting, Western, Up-Regulation, Tumor Suppressor Protein p53, Retinoblastoma Protein, Telomere, Cellular Senescence, Reverse Transcriptase Polymerase Chain Reaction, Oligonucleotide Array Sequence Analysis, Ubiquitin-Protein Ligases

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