Cited by 107Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressNeutrophil, Myeloperoxidase and Oxidative Mechanisms

Oxidative Stress and Increased eNOS and NADPH Oxidase Expression in Mouse Microvessel Endothelial Cells

Ding, Hong, Aljofan, Mohamad, Triggle, Chris R.·2007·Journal of Cellular Physiology

Abstract

Elevated oxidative stress plays a key role in diabetes-associated vascular disease. In this study, we tested the hypothesis that high glucose-induced oxidative stress was associated with changes in the expression of NADPH oxidase, superoxide dismutase (SOD) and endothelial nitric oxide synthase (eNOS). Oxidative stress was assessed in cell cultures of mouse microvessel endothelial cells (MMECs) by fluorescence labelling with dihydroethidium, lucigenin-enhanced chemiluminescence and determining NADPH oxidase subunit and eNOS expression with real-time polymerase chain reaction protocol and Western blotting. Oxidative stress and expression of the NADPH oxidase subunit, p22phox, were both increased, SOD1 and 3 expression lowered and eNOS significantly elevated in MMECs treated with 40 mM glucose for 72 h compared to low glucose medium. Oxidative stress, p22phox mRNA, eNOS mRNA, and protein were lowered by concurrent incubation with sepiapterin. When eNOS protein expression in endothelial cells was significantly decreased by eNOS siRNA treatment, superoxide generation was significantly higher in the MMECs grown in low glucose, but reduced in those grown in high glucose for 72 h. Thus, exposure of MMECs to high glucose results in increased oxidative stress that is associated with increased eNOS and NADPH oxidase subunit expression, notably p22phox, and decreased expression of SOD1 and 3.

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Crossref · 10.1002/jcp.21063

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  • Metformin and other drugs used for T2DM, like SGLT2 inhibitors, may also reduce hyperglycemia-induced elevated endothelial ROS, independent of negative effects on complex 1, such as via inhibition of NADPH oxidase or blocking entry of glucose into the endothelium.

    “Metformin and other drugs used for T2DM, like the SGLT2 inhibitors, may also reduce hyperglycemia-induced elevated endothelial ROS, independent of negative effects on complex 1, such as via inhibition of NADPH oxidase or blocking the entry of glucose into the endothelium (32, 107–109, 187, 188)”

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Authors
Ding, H., Aljofan, M., & Triggle, C. R.
Affiliations
RMIT University (AU)
Corresponding author
Ding, Hong
Venue
Journal of Cellular Physiology
Publisher
Wiley
Published
2007-04-18
Volume
212
Issue
3
Pages
682-689
ISSN
  • 0021-9541 (ISSN-L)
  • 1097-4652
OpenAlex
W2041427283
Cited by
107
References
41
Citations by year
2026: 1 · 2024: 2 · 2023: 5 · 2022: 2 · 2021: 8 · 2020: 7 · 2019: 10 · 2018: 8 · 2017: 7 · 2016: 2 · 2015: 5 · 2014: 9 · 2013: 8 · 2012: 10
FWCI
3.12
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cellular Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • RMIT Research Repository (RMIT University Library) (submittedVersion)
  • Figshare (submittedVersion)
Funders
National Institutes of Health
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
Keywords
oxidative stress, endothelial nitric oxide synthase, NADPH oxidase, p22phox, superoxide dismutase, high glucose, microvascular endothelial cells, sepiapterin, superoxide production
MeSH terms
Superoxide Dismutase-1, NADPH Oxidase 4, Acetophenones, Superoxide Dismutase 2, Alkaloids, Animals, Cells, Cultured, Cytochrome b Group, Dose-Response Relationship, Drug, Enzyme Inhibitors, Glucose, Microcirculation, Nitric Oxide, Protein Kinase C, Pterins, RNA, Messenger, Superoxides, Superoxide Dismutase, Transfection, Gene Expression Regulation, Enzymologic, Oxidative Stress, NADPH Oxidases, NG-Nitroarginine Methyl Ester, RNA Interference, RNA, Small Interfering, Endothelial Cells, Mice, Nitric Oxide Synthase Type II, Nitric Oxide Synthase Type III, Benzophenanthridines

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