Cited by 374Telomeres, Telomerase, and SenescenceCancer-related Molecular PathwaysGenetics, Aging, and Longevity in Model Organisms

Inhibition of p21‐mediated ROS accumulation can rescue p21‐induced senescence

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Macip, Salvador, Igarashi, Makoto, Fang, Li, Chen, Angus, Pan, Zhen‐Qiang, Lee, Sam W., Aaronson, Stuart A.·2002·The EMBO Journal

Abstract

The cyclin-dependent kinase (CDK) inhibitor p21(Waf1/Cip1/Sdi1) was identified initially as a gene induced in senescent cells and itself has been shown to cause permanent growth arrest/senescence. Reactive oxygen species (ROS), a byproduct of oxidative processes, can also induce an irreversible growth arrest similar to senescence. Here we show that p21 increased intracellular levels of ROS both in normal fibroblasts and in p53-negative cancer cells. N-acetyl-L-cysteine, an ROS inhibitor, rescued p21-induced senescence, showing that ROS elevation is necessary for induction of the permanent growth arrest phenotype. p16(Ink4a), a CDK4- and CDK6-specific inhibitor, failed to increase ROS levels, and cell cycle arrest induced by p16 was reversible following its down-regulation, demonstrating the specificity of this p21 effect. A p21 mutant that lacked the ability to bind proliferating cell nuclear antigen (PCNA) retained the ability to induce both ROS and permanent growth arrest. All of these findings establish that p21 mediates senescence by a mechanism involving ROS accumulation which does not require either its PCNA binding or the CDK inhibitory functions shared with p16.

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  1. [13]13. Dolphin,D., Poulson,R. and Avramovic,O. (1989) Glutathione: Chemical, Bochemical and Medical Aspects, Volumes A&B. John Wiley and Sons.
  2. [45]45. Staal,F.J., Roederer,M. and Herzenberg,L.A. (1990) Intracellular thiols regulate activation of nuclear factor kB and transcription of human immunode®ciency virus. Proc. Natl Acad. Sci. USA, 87, 9943±9947.

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Authors
Macip, S., Igarashi, M., Fang, L., Chen, A., Pan, Z., Lee, S. W., & Aaronson, S. A.
Affiliations
  • Icahn School of Medicine at Mount Sinai (US)
  • Beth Israel Deaconess Medical Center (US)
Corresponding author
Aaronson, Stuart A.
Venue
The EMBO Journal
Published
2002-05-01
Volume
21
Issue
9
Pages
2180-2188
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2133468132
Cited by
374
References
57
Citations by year
2026: 15 · 2025: 12 · 2024: 18 · 2023: 20 · 2022: 24 · 2021: 19 · 2020: 13 · 2019: 20 · 2018: 23 · 2017: 19 · 2016: 14 · 2015: 20 · 2014: 20 · 2013: 14 · 2012: 14
FWCI
6.80
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Leicester Research Archive (University of Leicester) (submittedVersion)
Funders
  • National Institutes of Health (5r01ca082211-04, 1r29gm055059-01a1, CA80058)
  • National Cancer Institute (R01CA078356, CA 80058, CA82211, CA85214, R01CA085214, P01CA080058, CA78356)
  • National Institute of General Medical Sciences (GM 55059)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
p21, reactive oxygen species, cellular senescence, growth arrest, cyclin-dependent kinase inhibitors, N-acetylcysteine, p16, proliferating cell nuclear antigen, fibroblasts, oxidative stress
MeSH terms
Acetylcysteine, Fibroblasts, Humans, Tumor Cells, Cultured, Free Radical Scavengers, Cyclins, Cellular Senescence, Reactive Oxygen Species, Proliferating Cell Nuclear Antigen, Cyclin-Dependent Kinase Inhibitor p16, Cyclin-Dependent Kinase Inhibitor p21

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