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Related Experiment Videos

Vaginal-cervical epithelial permeability decreases after menopause.

G I Gorodeski1

  • 1Department of Obstetrics and Gynecology, University MacDonald Women's Hospital, Cleveland, Ohio 44106, USA. gig@po.cwru.edu

Fertility and Sterility
|October 10, 2001
PubMed
Summary

Aging and estrogen deficiency independently reduce vaginal-cervical epithelial barrier function. Estrogen replacement therapy can increase permeability, but this effect is counteracted by age-related changes in tight junctions.

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Area of Science:

  • Gynecology and Reproductive Biology
  • Epithelial Biology
  • Pharmacology

Background:

  • Menopause is associated with significant physiological changes, including alterations in vaginal-cervical epithelial barrier function.
  • Estrogen (E) plays a crucial role in maintaining epithelial integrity and permeability.

Purpose of the Study:

  • To investigate the independent and combined effects of aging and estrogen levels on vaginal-cervical epithelial paracellular permeability.

Main Methods:

  • Utilized primary and tertiary cultures of human ectocervical epithelial cells from premenopausal, perimenopausal, and postmenopausal women.
  • Assessed paracellular permeability by measuring transepithelial electrical conductance and pyranine permeability.

Main Results:

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  • Paracellular permeability decreased with advancing age, indicating increased epithelial barrier function.
  • Estrogen removal reduced permeability, while estrogen (17beta-estradiol) treatment increased it, though effects were age-dependent.
  • Tamoxifen blocked estrogen's effect on permeability, suggesting a receptor-mediated mechanism.

Conclusions:

  • Both aging and estrogen deficiency independently decrease vaginal-cervical epithelial paracellular permeability.
  • Estrogen increases permeability in postmenopausal women via estrogen receptors, but this is masked by age-related increases in tight junction resistance.