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Vitamin E and leukocyte-endothelial cell interactions.

T Yoshikawa1, N Yoshida

  • 1First Department of Internal Medicine, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.

Antioxidants & Redox Signaling
|February 24, 2001
PubMed
Summary

Vitamin E, an antioxidant, prevents leukocyte-endothelial cell adhesion by inhibiting key signaling pathways. This suggests vitamin E may protect against inflammation and atherosclerosis progression.

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Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Leukocyte-endothelial cell interactions are crucial in inflammatory and immunologic reactions, including atherosclerosis.
  • These interactions involve adhesion molecules, modulated by cytokines and chemical mediators.
  • Vitamin E, a lipid-soluble antioxidant, is known for its anti-atherogenic properties.

Purpose of the Study:

  • To investigate the mechanism by which vitamin E affects leukocyte-endothelial cell adhesion.
  • To determine if vitamin E influences the signaling pathways regulating adhesion molecule expression.

Main Methods:

  • The study examined the effect of vitamin E on signal transduction pathways.
  • Assessed the impact of vitamin E on the surface expression of adhesion molecules on leukocytes and endothelial cells.

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Main Results:

  • Vitamin E was shown to inhibit protein kinase C and nuclear factor-kappa B (NF-kappa B) activation.
  • Vitamin E effectively prevented leukocyte-endothelial cell adhesion.
  • The mechanism involves inhibiting signal transduction pathways controlling adhesion molecule expression.

Conclusions:

  • Vitamin E demonstrates a protective effect against leukocyte-endothelial cell adhesion.
  • Inhibition of key signaling pathways by vitamin E contributes to its anti-atherogenic effects.
  • Vitamin E may play a role in mitigating inflammation and the progression of atherosclerosis.