Cited by 1,577Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressNeutrophil, Myeloperoxidase and Oxidative Mechanisms

High glucose level and free fatty acid stimulate reactive oxygen species production through protein kinase C--dependent activation of NAD(P)H oxidase in cultured vascular cells

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Inoguchi, T, Li, P, Umeda, F, Yu, H Y, Kakimoto, M, Imamura, M, Aoki, T, Etoh, T +5 more·2000·Diabetes

Abstract

Recent studies have revealed that vascular cells can produce reactive oxygen species (ROS) through NAD(P)H oxidase, which may be involved in vascular injury. However, the pathological role of vascular NAD(P)H oxidase in diabetes or in the insulin-resistant state remains unknown. In this study, we examined the effect of high glucose level and free fatty acid (FFA) (palmitate) on ROS production in cultured aortic smooth muscle cells (SMCs) and endothelial cells (ECs) using electron spin resonance spectroscopy. Exposure of cultured SMCs or ECs to a high glucose level (400 mg/dl) for 72 h significantly increased the free radical production compared with low glucose level exposure (100 mg/dl). Treatment of the cells for 3 h with phorbol myristic acid (PMA), a protein kinase C (PKC) activator, also increased free radical production. This increase was restored to the control value by diphenylene iodonium, a NAD(P)H oxidase inhibitor, suggesting ROS production through PKC-dependent activation of NAD(P)H oxidase. The increase in free radical production by high glucose level exposure was completely restored by both diphenylene iodonium and GF109203X, a PKC-specific inhibitor. Exposure to palmitate (200 micromol/l) also increased free radical production, which was concomitant with increases in diacylglycerol level and PKC activity. Again, this increase was restored to the control value by both diphenylene iodonium and GF109203X. The present results suggest that both high glucose level and palmitate may stimulate ROS production through PKC-dependent activation of NAD(P)H oxidase in both vascular SMCs and ECs. This finding may be involved in the excessive acceleration of atherosclerosis in patients with diabetes and insulin resistance syndrome.

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Crossref · 10.2337/diabetes.49.11.1939

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  • FFAs also contribute to a higher production of ROS and inflammation in endothelial cells.

    “FFAs also contribute to a higher production of ROS and inflammation in ECs [260].”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [260]

  • Activated PKC promotes oxidative stress by activating NADPH oxidase.

    “Activated PKC in turn promotes oxidative stress by activating NADPH oxidase.”

    From The Vasculature in Prediabetes (2018) · cites this paper as [66]

  • FFAs activate NADPH oxidase via PKC to generate ROS.

    “FFAs activate NADPH oxidase via PKC to generate ROS.”

    From The Vasculature in Prediabetes (2018) · cites this paper as [66]

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Research works printed but not linked: 1

  1. King GL, Johnson S, Wu G: Possible growth modulators involved in the patho- genesis of diabetic proliferative retinopathy. In Growth Factors in Health and Disease. Westermark B, Betscholtz C, Hokfelt B, Eds. Amsterdam, Elsevier Science, 1990, p. 303-317

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Authors
Inoguchi, T., Li, P., Umeda, F., Yu, H. Y., Kakimoto, M., Imamura, M., Aoki, T., Etoh, T., Hashimoto, T., Naruse, M., Sano, H., Utsumi, H., & Nawata, H.
Affiliations
Kyushu University (JP)
Venue
Diabetes
Published
2000-11-01
Volume
49
Issue
11
Pages
1939-1945
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2109168147
Cited by
1,577
References
57
Citations by year
2026: 23 · 2025: 35 · 2024: 40 · 2023: 50 · 2022: 61 · 2021: 63 · 2020: 61 · 2019: 59 · 2018: 63 · 2017: 55 · 2016: 70 · 2015: 77 · 2014: 86 · 2013: 74 · 2012: 80
FWCI
23.45
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (11671126)
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
reactive oxygen species, NADPH oxidase, protein kinase C, high glucose, free fatty acids, palmitate, aortic smooth muscle cells, endothelial cells, diacylglycerol, oxidative stress, insulin resistance, atherosclerosis
MeSH terms
Animals, Aorta, Blood Vessels, Cattle, Cells, Cultured, Electron Spin Resonance Spectroscopy, Endothelium, Vascular, Enzyme Activation, Enzyme Inhibitors, Fatty Acids, Nonesterified, Glucose, Indoles, Maleimides, Muscle, Smooth, Vascular, Onium Compounds, Protein Kinase C, Tetradecanoylphorbol Acetate, Reactive Oxygen Species, NADPH Oxidases, Palmitic Acid

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