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Antioxidants, diabetes and endothelial dysfunction.

D W Laight1, M J Carrier, E E Anggård

  • 1The William Harvey Research Institute, St. Bartholomew's and the Royal London School of Medicine and Dentistry, Charterhouse Square, EC1 6BQ, London, UK. d.w.laight@mds.qmw.ac.uk

Cardiovascular Research
|August 30, 2000
PubMed
Summary
This summary is machine-generated.

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Oxidative stress in diabetes impairs blood vessel function and insulin sensitivity. Antioxidant supplements like vitamin E show promise in normalizing these effects, but more clinical trials are needed.

Area of Science:

  • Cardiovascular Science
  • Endocrinology
  • Metabolic Syndrome

Background:

  • Endothelial dysfunction is linked to diabetic macroangiopathy and other diabetes complications.
  • Oxidative stress and reduced antioxidant defenses are observed in diabetes and insulin resistance syndrome.
  • Impaired nitric oxide (NO)-dependent microvascular function contributes to diabetes comorbidities.

Purpose of the Study:

  • To investigate the role of oxidative stress in endothelial dysfunction in diabetes.
  • To explore the potential of antioxidant supplementation in improving vascular function and insulin sensitivity.

Main Methods:

  • Review of experimental and clinical data on oxidant stress markers and antioxidant levels in diabetes.
  • Analysis of studies investigating antioxidant supplementation (e.g., vitamin E) in insulin-resistant and diabetic states.

Related Experiment Videos

Main Results:

  • Diabetes is associated with increased oxidant stress markers and decreased antioxidant capacity.
  • Antioxidant supplementation has shown potential to normalize oxidant stress.
  • Improvements in endothelium-dependent vasodilation and insulin sensitivity have been observed with antioxidant therapy.

Conclusions:

  • Oxidative stress in diabetes negatively impacts endothelial function by inactivating nitric oxide (NO).
  • Antioxidant therapy, such as vitamin E, may offer a therapeutic strategy for cardiovascular disease and diabetes.
  • Definitive clinical evidence is required to confirm the efficacy of antioxidant therapy in preventing or treating these conditions.