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[Natural estrogens and the cardiovascular system]

A Bader1, J Sacrez, B Langer

  • 1Service de Gynécologie-Obstétrique II, Hôpital de Hautepierre, Hôpitaux Universitaires, Strasbourg.

Journal De Gynecologie, Obstetrique Et Biologie De La Reproduction
|January 1, 1996
PubMed
Summary

Hormone therapy during menopause significantly reduces cardiovascular risk by improving vascular function and reducing atherosclerosis. Natural estrogens offer vascular benefits beyond lipid modification, making them suitable for patients with hypertension or atheromatosis.

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Area of Science:

  • Endocrinology and Cardiovascular Medicine
  • Estrogen receptor signaling pathways
  • Vascular biology and atherosclerosis

Context:

  • Menopause is associated with increased cardiovascular risk.
  • Hormone substitution therapy (HST) has shown cardiovascular benefits.
  • The precise mechanisms of estrogen's vascular effects are complex and multifactorial.

Purpose:

  • To elucidate the multifaceted mechanisms by which natural estrogens exert protective effects on the vasculature.
  • To explore the direct and indirect vascular actions of estrogens beyond their impact on plasma lipids.
  • To reassess the indications for hormone substitution therapy in light of new mechanistic insights.

Summary:

  • Natural estrogens improve vascular function through endothelium-dependent mechanisms, including enhanced potassium influx, stimulation of prostacyclin and prostaglandin synthesis, and increased nitric oxide production (endothelium-derived relaxing factor).

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  • Endothelium-independent mechanisms, such as anti-calcium effects and endothelin antagonism, further contribute to improved vascular flow and reduced resistance.
  • Estrogens also exhibit anti-atherogenic properties by modulating gene expression via specific receptors on vascular cells, impacting atherosclerosis development.

    • Impact:

    • Provides a comprehensive understanding of estrogen's vascular protective effects, extending beyond lipid modification.
    • Supports the expanded use of hormone substitution therapy in postmenopausal women, particularly those with existing cardiovascular risk factors like hypertension and atheromatosis.
    • Highlights the therapeutic potential of targeting estrogen pathways for cardiovascular disease prevention and management.