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Related Experiment Videos

Oxidant stress and atherosclerosis.

Mitsuhiro Yokoyama1

  • 1Cardiovascular Division, Department of Medicine, Kobe University Graduate School of Medicine, 5-1.7-Chome, Kusunoki-Cho, Chuo-ku, Kobe, 650-0017, Japan. yokohama@med.kobe-u.ac.jp

Current Opinion in Pharmacology
|April 6, 2004
PubMed
Summary

Oxidative stress contributes to endothelial dysfunction and atherosclerosis. Dysfunctional nitric oxide synthase generates harmful reactive oxygen species, while NAD(P)H oxidase upregulation worsens plaque instability.

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Area of Science:

  • Cardiovascular Science
  • Oxidative Stress Research
  • Vascular Biology

Background:

  • Oxidative stress and reactive oxygen species (ROS) play a key role in endothelial dysfunction.
  • Endothelial dysfunction is central to atherosclerosis initiation, progression, and adverse cardiovascular events.
  • Nitric oxide (NO) from endothelial nitric oxide synthase (eNOS) is vasoprotective, while ROS from vascular NAD(P)H oxidase are signaling molecules.

Purpose of the Study:

  • To elucidate the role of ROS in endothelial dysfunction and atherosclerosis.
  • To investigate the dual role of eNOS and NAD(P)H oxidase in vascular health and disease.
  • To understand the mechanisms linking oxidative stress to atherosclerotic plaque instability.

Main Methods:

  • Analysis of reactive oxygen species production in vascular cells.

Related Experiment Videos

  • Assessment of nitric oxide synthase (NOS) and NAD(P)H oxidase activity in atherosclerotic models.
  • Evaluation of the association between enzyme activity, ROS generation, and plaque characteristics.

    • Main Results:

    • Evidence confirms the critical role of nitric oxide derived from endothelial nitric oxide synthase (eNOS) as a vasoprotective substance.
    • Vascular NAD(P)H oxidase-derived ROS are important signaling molecules in vascular cells.
    • eNOS dysfunction in atherosclerosis leads to superoxide (O(2)(-)) generation instead of NO.
    • Upregulation of vascular NAD(P)H oxidase is strongly linked to atherosclerotic progression and plaque instability.

    Conclusions:

    • Oxidative stress is a significant driver of endothelial dysfunction and atherosclerosis.
    • eNOS dysfunction and increased NAD(P)H oxidase activity contribute to atherosclerotic pathology.
    • Targeting ROS production pathways may offer therapeutic strategies for cardiovascular disease.