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Related Experiment Videos

Cyclooxygenase-2 expression in endometrial polyps during menopause.

Hugo Maia1, Tânia Correia, Luis Antônio Freitas

  • 1Centro de Pesquisa e Assistência em Reprodução Humana (CEPARH), Salvador, Bahia, Brazil. ceparh@uol.com.br

Gynecological Endocrinology : the Official Journal of the International Society of Gynecological Endocrinology
|January 5, 2006
PubMed
Summary

Cyclooxygenase-2 (COX-2) is expressed in menopausal endometrial polyps. Hormone therapy did not significantly alter COX-2 levels, but affected cell proliferation markers.

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Area of Science:

  • Reproductive endocrinology
  • Gynecologic pathology
  • Molecular biology

Background:

  • Endometrial polyps are common in postmenopausal women.
  • The role of cyclooxygenase-2 (COX-2) in polyp development is not fully understood.
  • Previous hormone use may influence polyp characteristics.

Purpose of the Study:

  • To investigate COX-2 expression in menopausal endometrial polyps.
  • To assess the impact of prior hormone therapy on COX-2 expression.
  • To correlate COX-2 expression with cell proliferation marker Ki-67.

Main Methods:

  • Immunohistochemistry was used to measure COX-2 and Ki-67 expression in polyp tissues.
  • Fifty-two postmenopausal women with endometrial polyps were studied.
  • Patients were categorized based on hormone therapy history: no use, short-term vaginal estrogens, or long-term tibolone/tamoxifen.

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Main Results:

  • COX-2 was expressed in the glandular epithelium of endometrial polyps.
  • No significant difference in COX-2 expression was observed across hormone use groups.
  • Ki-67 expression was higher in vaginal estrogen users compared to non-users.

Conclusions:

  • COX-2 is present in menopausal endometrial polyps.
  • COX-2 may be involved in the growth regulation of endometrial polyps.
  • Hormone therapy's effect on polyp growth may involve pathways other than COX-2 expression.