Requirements of phosphatidylinositol-3 kinase and mammalian target of rapamycin for estrogen-induced proliferation in uterine leiomyoma- and myometrium-derived cell lines

Xuejun J. Yin, Gangduo Wang, Firyal S. Khan-Dawood

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Objective: This study was undertaken to investigate the effects of 17β-estradiol (E2) on G1 cell cycle progression and proliferation in uterine fibroid and myometrial cells and the roles of phosphatidylinositol-3 kinase and mammalian target of rapamycin in mediating these estrogen effects. Study Design: The human uterine smooth muscle-derived cells (UtSM) and uterine leiomyoma-derived cells (UtLM) were treated with varying doses of E2 with or without pretreatment with LY294002, a phosphatidylinositol-3 kinase inhibitor, or rapamycin, a mammalian target of rapamycin inhibitor. The effects of E2 on cell cycle progression and proliferation and the roles of phosphatidylinositol-3 kinase and mammalian target of rapamycin in E2-induced effects were studied. Results: Compared with controls, E2 significantly induced G1 cell cycle progression and proliferation in uterine smooth muscle-derived cells and uterine leiomyoma-derived cells. These effects, however, were significantly blocked when LY294002 or rapamycin was used. Conclusion: E2 significantly induces G1 cell cycle progression and cell proliferation in uterine smooth muscle-derived cells and uterine leiomyoma-derived cells, in which phosphatidylinositol-3 kinase and mammalian target of rapamycin are essentially required.

Original languageEnglish (US)
Pages (from-to)176.e1-176.e5
JournalAmerican journal of obstetrics and gynecology
Volume196
Issue number2
DOIs
StatePublished - Feb 2007
Externally publishedYes

Keywords

  • 17β-estradiol
  • mammalian target of rapamycin
  • phosphatidylinositol-3 kinase
  • proliferation
  • uterine leiomyomas

ASJC Scopus subject areas

  • Obstetrics and Gynecology

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