Cited by 187Redox biology and oxidative stressSelenium in Biological SystemsOrganoselenium and organotellurium chemistry

Glutathione Peroxidase-1 Regulates Mitochondrial Function to Modulate Redox-dependent Cellular Responses

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Handy, Diane E., Lubos, Edith, Yang, Yi, Galbraith, John D., Kelly, Neil, Zhang, Ying-Yi, Leopold, Jane A., Loscalzo, Joseph·2009·Journal of Biological Chemistry

Abstract

Glutathione peroxidase-1 (GPx-1) is a selenocysteine-containing enzyme that plays a major role in the reductive detoxification of peroxides in cells. In permanently transfected cells with approximate 2-fold overexpression of GPx-1, we found that intracellular accumulation of oxidants in response to exogenous hydrogen peroxide was diminished, as was epidermal growth factor receptor (EGFR)-mediated Akt activation in response to hydrogen peroxide or EGF stimulation. Knockdown of GPx-1 augmented EGFR-mediated Akt activation, whereas overexpression of catalase decreased Akt activation, suggesting that EGFR signaling is regulated by redox mechanisms. To determine whether mitochondrial oxidants played a role in these processes, cells were pretreated with a mitochondrial uncoupler prior to EGF stimulation. Inhibition of mitochondrial function attenuated EGF-mediated activation of Akt in control cells but had no additional effect in GPx-1-overexpressing cells, suggesting that GPx-1 overexpression decreased EGFR signaling by decreasing mitochondrial oxidants. Consistent with this finding, GPx-1 overexpression decreased global protein disulfide bond formation, which is dependent on mitochondrially produced oxidants. GPx-1 overexpression, in permanently transfected or adenovirus-treated cells, also caused overall mitochondrial dysfunction with a decrease in mitochondrial potential and a decrease in ATP production. GPx-1 overexpression also decreased EGF- and serum-mediated [(3)H]thymidine incorporation, indicating that alterations in GPx-1 can attenuate cell proliferation. Taken together, these data suggest that GPx-1 can modulate redox-dependent cellular responses by regulating mitochondrial function.

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Crossref · 10.1074/jbc.m900392200

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  • GPx-1 plays an essential role in modulating intracellular hydrogen peroxide with consequences for growth factor-mediated signaling and mitochondrial ATP production.

    “GPx-1 plays an essential role in modulating intracellular hydrogen peroxide with consequences for growth factor-mediated signaling and mitochondrial ATP production (169).”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [169]

  • GPx-1 modulates mitochondrial function as its overexpression decreases mitochondrial electrochemical potential, ROS generation, and ATP synthesis.

    “Furthermore, GPx-1 modulates mitochondrial function as its overexpression decreases mitochondrial electrochemical potential (decreases ΔΨ), ROS generation, and ATP synthesis (169).”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [169]

  • Decreasing cellular ROS through overexpression of antioxidant GPx-1 disrupts normal cellular disulfide formation with consequences for mitochondrial function.

    “Our more recent study showed that decreasing cellular ROS through the overexpression of the antioxidant GPx-1 disrupts normal cellular disulfide formation with consequences for mitochondrial function (169).”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [169]

  • Suppression of mitochondrial function by excess GPx-1 contributes to diminished growth factor-mediated Akt activation and cellular proliferation.

    “Furthermore, this suppression of mitochondrial function contributes to diminished responses in growth factor-mediated Akt activation and cellular proliferation (169).”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [169]

  • Excess GPx-1, in both cytosol and mitochondria, decreases mitochondrial potential and ATP production.

    “Thus, excess GPx-1, in both the cytosol and the mitochondria, decreases mitochondrial potential and ATP production.”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [169]

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Research works printed but not linked: 6

  1. Goossens, V., Grooten, J., De Vos, K., and Fiers, W. (1995) Proc. Natl. Acad. Sci. U. S. A. 92, 8115-8119
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Authors
Handy, D. E., Lubos, E., Yang, Y., Galbraith, J. D., Kelly, N., Zhang, Y.-Y., Leopold, J. A., & Loscalzo, J.
Affiliations
Brigham and Women's Hospital (US)
Corresponding author
Handy, Diane E.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2009-05
Volume
284
Issue
18
Pages
11913-11921
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2020272282
Cited by
187
References
64
Citations by year
2026: 12 · 2025: 10 · 2024: 5 · 2023: 6 · 2022: 18 · 2021: 8 · 2020: 17 · 2019: 11 · 2018: 14 · 2017: 16 · 2016: 9 · 2015: 11 · 2014: 7 · 2013: 13 · 2012: 8
FWCI
4.02
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Funders
National Heart, Lung, and Blood Institute (HL81587, HL61795, HL58976, R01HL058976, P01HL081587, R01HL061795)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Organoselenium and organotellurium chemistry
Keywords
glutathione peroxidase 1, redox signaling, EGFR signaling, Akt activation, hydrogen peroxide, protein disulfide bond formation, mitochondrial dysfunction, mitochondrial membrane potential, ATP production, cell proliferation, catalase, oxidative stress
MeSH terms
Glutathione Peroxidase GPX1, Adenosine Triphosphate, Adenoviridae, Catalase, Cell Line, Disulfides, Enzyme Activation, Epidermal Growth Factor, Glutathione Peroxidase, Humans, Hydrogen Peroxide, Mitochondria, Liver, Oxidation-Reduction, Transduction, Genetic, Uncoupling Agents, Signal Transduction, Oxidants, Selenocysteine, Cell Proliferation, Proto-Oncogene Proteins c-akt, Selenoproteins, Gene Knockdown Techniques, ErbB Receptors

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