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Many cellular signals are hydrophilic and cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind intracellular receptors that reside within the cell cytoplasm or nucleus. Many mammalian steroid hormones and nitric oxide (NO) gas use this cell signaling mechanism.
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[Endogenous and exogenous estrogens].

Theodora Bejan-Angoulvant1, Jean-Francois Arnal2

  • 1CHRU de Tours, hôpital Bretonneau, université de Tours, service de pharmacologie médicale, équipe pharmacologie des anticorps thérapeutiques chez l'homme, EA 7501, GICC, 2, boulevard Tonnellé, 37000 Tours, France.

Presse Medicale (Paris, France : 1983)
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Summary
This summary is machine-generated.

Endogenous estrogens protect premenopausal women from hypertension and atherosclerosis. Menopausal treatments with exogenous estrogens and synthetic progestins have varied vascular effects, requiring individual drug evaluation.

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Area of Science:

  • Cardiovascular Science
  • Endocrinology
  • Pharmacology

Background:

  • Endogenous estrogens offer cardiovascular protection against hypertension and atherosclerosis in premenopausal women.
  • Estrogens exhibit a vasoprotective role, while progesterone appears to have a neutral effect on vascular health.

Purpose of the Study:

  • To evaluate the vascular effects of exogenous estrogens and synthetic progestins used in menopausal hormone therapy.
  • To understand how drug type, dosage, and administration influence these vascular effects.
  • To determine the impact of patient age and atherosclerosis stage on treatment outcomes.

Main Methods:

  • Review of existing literature on hormone therapy and vascular effects.
  • Analysis of clinical data on exogenous estrogen and synthetic progestin efficacy.
  • Comparative evaluation of different drug formulations and administration routes.

Main Results:

  • Exogenous estrogens demonstrate notable vascular effects in menopausal treatments.
  • The impact of these therapies is contingent upon specific drug characteristics, dosage, and delivery method.
  • Patient-specific factors like age and the progression of atherosclerosis significantly modulate treatment outcomes.
  • Synthetic progestins exhibit diverse clinical effects, necessitating distinct assessments for each agent.

Conclusions:

  • The vascular effects of hormone therapy for menopause are complex and drug-specific.
  • Individualized assessment of exogenous estrogens and synthetic progestins is crucial for safe and effective menopausal treatment.
  • Further research is needed to fully elucidate the long-term vascular implications of various hormone therapy regimens.