Cited by 28Redox biology and oxidative stressTelomeres, Telomerase, and SenescenceProtein Kinase Regulation and GTPase Signaling

Cellular Redox Imbalance and Changes of Protein S-glutathionylation Patterns Are Associated with Senescence Induced by Oncogenic H-Ras

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Armeni, Tatiana, Ercolani, Luisa, Urbanelli, Lorena, Magini, Alessandro, Magherini, Francesca, Pugnaloni, Armanda, Piva, Francesco, Modesti, Alessandra +2 more·2012·PLoS ONE

Abstract

H-Ras oncogene requires deregulation of additional oncogenes or inactivation of tumor suppressor proteins to increase cell proliferation rate and transform cells. In fact, the expression of the constitutively activated H-RasV12 induces cell growth arrest and premature senescence, which act like barriers in pre-neoplastic lesions. In our experimental model, human fibroblasts transfected with H-RasV12 show a dramatic modification of morphology. H-RasV12 expressing cells also show premature senescence followed by cell death, induced by autophagy and apoptosis. In this context, we provide evidence that in H-RasV12 expressing cells, the premature senescence is associated with cellular redox imbalance as well as with altered post-translation protein modification. In particular, redox imbalance is due to a strong reduction of total antioxidant capacity, and significant decrease of glutathione level. As the reversible addition of glutathione to cysteinyl residues of proteins is an important post-translational regulative modification, we investigated S-glutathionylation in cells expressing active H-Ras. In this contest we observed different S-glutathionylation patterns in control and H-RasV12 expressing cells. Particularly, the GAPDH enzyme showed S-glutathionylation increase and significant enzyme activity depletion in H-Ras V12 cells. In conclusion, we proposed that antioxidant defense reduction, glutathione depletion and subsequent modification of S-glutathionylation of target proteins contribute to arrest cell growth, leading to death of fibroblasts expressing constitutively active H-Ras oncogene, thus acting as oncogenic barriers that obstacle the progression of cell transformation.

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Authors
Armeni, T., Ercolani, L., Urbanelli, L., Magini, A., Magherini, F., Pugnaloni, A., Piva, F., Modesti, A., Emiliani, C., & Principato, G.
Affiliations
  • Marche Polytechnic University (IT)
  • University of Perugia (IT)
  • University of Florence (IT)
Corresponding author
Armeni, Tatiana
Venue
PLoS ONE
Published
2012-12-20
Volume
7
Issue
12
Pages
e52151
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2040358545
Cited by
28
References
61
Citations by year
2025: 1 · 2023: 2 · 2022: 4 · 2021: 1 · 2020: 5 · 2019: 3 · 2018: 2 · 2017: 3 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 2
FWCI
0.77
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Università Politecnica delle Marche (Università Politecnica delle Marche) (submittedVersion)
Funders
Fondazione Cassa di Risparmio di Perugia (2008.021.375)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
H-Ras V12, premature senescence, S-glutathionylation, glutathione depletion, antioxidant capacity, post-translational modification, glyceraldehyde-3-phosphate dehydrogenase, human fibroblasts, autophagy, apoptosis, cell transformation
MeSH terms
Antioxidants, Autophagy, Cell Cycle, Cell Line, Humans, Oxidation-Reduction, Genes, ras, Mass Spectrometry, Immunoblotting, Electrophoresis, Gel, Two-Dimensional, Cellular Senescence, Cell Death, Apoptosis, Reactive Oxygen Species

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