Cited by 691Telomeres, Telomerase, and SenescenceGenetics, Aging, and Longevity in Model OrganismsRedox biology and oxidative stress

Ras Proteins Induce Senescence by Altering the Intracellular Levels of Reactive Oxygen Species

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Lee, Andrew C., Fenster, Brett E., Ito, Hideki, Takeda, Kazuyo, Bae, Nancy S., Hirai, Tazuko, Yu, Zu-Xi, Ferrans, Victor J. +2 more·1999·Journal of Biological Chemistry

Abstract

Human diploid fibroblasts eventually lose the capacity to replicate in culture and enter a viable but nonproliferative state of senescence. Recently, it has been demonstrated that retroviral-mediated gene transfer into primary fibroblasts of an activated ras gene (V12ras) rapidly accelerates development of the senescent phenotype. Using this in vitro system, we have sought to define the mediators of Ras-induced senescence. We demonstrate that expression of V12Ras results in an increase in intracellular and in particular, mitochondrial reactive oxygen species. The ability of V12Ras to induce growth arrest and senescence is shown to be partially inhibited by coexpression of an activated rac1 gene. A more dramatic rescue of V12Ras-expressing cells is demonstrated when the cells are placed in a low oxygen environment, a condition in which reactive oxygen species production is inhibited. In addition, in a 1% oxygen environment, Ras is unable to trigger an increase in the level of the cyclin-dependent kinase inhibitor p21 or to activate the senescent program. Under normoxic (20% O2) conditions, the V12Ras senescent phenotype is demonstrated to be unaffected by scavengers of superoxide but rescued by scavengers of hydrogen peroxide. These results suggest that in normal diploid cells, Ras proteins regulate oxidant production and that a rise in intracellular H2O2 represents a critical signal mediating replicative senescence.

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Crossref · 10.1074/jbc.274.12.7936

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  • The RAS mitogenic pathway signals through reactive oxygen species, generation of which is required for both the pathway's mitogenic effects and its ability to induce cellular senescence.

    “The RAS mitogenic pathway signals through reactive oxygen species (ROS), generation of which is required for both the pathway’s mitogenic effects (Irani et al., 1997) and ability to induce cellular senescence (Lee et al., 1999).”
  • Ras-induced senescence can be inhibited by using antioxidants or growing cells in low-oxygen conditions.

    “Ras-induced senescence can be inhibited by using antioxidants or growing cells in low-oxygen conditions (8, 25, 33, 51).”
  • Production of reactive oxygen species underlies the premature senescence phenotype induced by oncogenes such as ras.

    “the production of reactive oxygen species seems to underlie the premature senescence phenotype induced by oncogenes such as ras (15).”

    From Glycolytic Enzymes Can Modulate Cellular Life Span (2005) · cites this paper as [15]

  • Oncogenic ras can stimulate reactive oxygen species production.

    “Because oncogenic ras can also stimulate reactive oxygen species production (15), we examined the effect of oncogenic ras on reactive oxygen species production in PGM or wild-type MEFs.”

    From Glycolytic Enzymes Can Modulate Cellular Life Span (2005) · cites this paper as [15]

  • Oxidative stress may amplify DNA damage signaling in oncogene-overexpressing cells because high ROS levels have been detected in these cells.

    “Oxidative stress also may amplify DNA damage signaling in oncogene-overexpressing cells because high ROS levels have been detected in these cells [120].”

    From Mechanisms and Regulation of Cellular Senescence (2021) · cites this paper as [120]

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Authors
Lee, A. C., Fenster, B. E., Ito, H., Takeda, K., Bae, N. S., Hirai, T., Yu, Z.-X., Ferrans, V. J., Howard, B. H., & Finkel, T.
Affiliations
  • National Institutes of Health (US)
  • National Heart, Lung, and Blood Institute (US)
Corresponding author
Finkel, Toren
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1999-03
Volume
274
Issue
12
Pages
7936-7940
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2102088119
Cited by
691
References
44
Citations by year
2026: 5 · 2025: 12 · 2024: 11 · 2023: 21 · 2022: 23 · 2021: 30 · 2020: 23 · 2019: 24 · 2018: 19 · 2017: 28 · 2016: 40 · 2015: 34 · 2014: 42 · 2013: 26 · 2012: 44
FWCI
11.14
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
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 › Redox biology and oxidative stress
Keywords
oncogenic Ras, replicative senescence, reactive oxygen species, hydrogen peroxide, mitochondrial superoxide, Rac1, growth arrest, p21, low oxygen environment, oxidative stress signaling, human diploid fibroblasts, retroviral gene transfer
MeSH terms
Cells, Cultured, Fibroblasts, Flow Cytometry, Humans, Oxidation-Reduction, Oxygen, Apoptosis, Reactive Oxygen Species, ras Proteins

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