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Homocysteine and essential hypertension

Ramón Rodrigo1, Walter Passalacqua, Julia Araya

  • 1Instituto de Ciencias Biomédicas, Programa de Farmacología Molecular y Clínica, Facultad de Medicina, Universidad de Chile, Santiago, Chile.

Journal of Clinical Pharmacology
|November 15, 2003
PubMed

Insights

High homocysteine levels may contribute to essential hypertension by impairing blood vessel function. Supplementing with B vitamins and folic acid might help manage blood pressure, but more research is needed.

Area of Science:

  • Cardiovascular Research
  • Hypertension Pathogenesis
  • Vascular Biology

Background:

  • Essential hypertension mechanisms remain unclear, potentially involving vascular endothelial and smooth muscle cell dysfunction.
  • Endothelial dysfunction can disrupt normal endothelium-dependent vasomotor regulation.
  • Homocysteine is an emerging risk factor for cardiovascular disease.

Purpose of the Study:

  • To review clinical and experimental data on homocysteine's role in essential hypertension pathogenesis.
  • To explore the mechanisms by which homocysteine may influence blood pressure regulation.

Main Methods:

  • Review of existing clinical and experimental data.
  • Analysis of homocysteine's effects on vascular function, nitric oxide bioavailability, oxidative stress, and vascular wall properties.

Main Results:

  • Elevated homocysteine diminishes nitric oxide-mediated vasodilation.
  • High homocysteine levels increase oxidative stress and vascular smooth muscle cell proliferation.
  • Homocysteine alters vascular wall elasticity, contributing to elevated blood pressure and endothelial oxidant injury.

Conclusions:

  • Homocysteine is implicated in the pathogenesis of essential hypertension through vascular dysfunction.
  • Vitamin B12, B6, and folic acid supplementation may offer an adjunctive therapy for hypertension.
  • Further randomized controlled trials are required to confirm the efficacy and safety of vitamin therapy for hypertension.

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