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Isolation of Mouse Endometrial Epithelial and Stromal Cells for In Vitro Decidualization
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MIG-6 suppresses endometrial epithelial cell proliferation by inhibiting phospho-AKT

Jung-Yoon Yoo1,2, Hee-Bum Kang3, Russell R Broaddus4

  • 1Department of Obstetrics, Gynecology and Reproductive Biology, College of Human Medicine, Michigan State University, Grand Rapids, MI, 49503, USA.

BMC Cancer
|May 31, 2018
PubMed
Abstract

Insights

Progesterone (P4) inhibits endometrial cell proliferation by regulating Mitogen-inducible gene 6 (Mig-6) and AKT signaling. This discovery offers new insights into P4"s mechanisms, potentially improving non-surgical treatments for endometrial cancer.

Area of Science:

  • Reproductive biology
  • Molecular endocrinology
  • Cancer research

Background:

  • Endometrial cancer is often linked to overactive epithelial proliferation and AKT signaling, frequently associated with unopposed estrogen (E2) exposure.
  • Progesterone (P4) normally inhibits uterine proliferation via stromal-epithelial cross-talk, a process mediated by Mitogen-inducible gene 6 (Mig-6).
  • Non-surgical therapies using progesterone alone have limitations due to incomplete understanding of its effects on endometrial cells.

Purpose of the Study:

  • To elucidate the roles of Mig-6 and P4 in regulating uterine epithelial cell proliferation.
  • To investigate the mechanisms by which P4 influences AKT signaling in the endometrium.

Main Methods:

  • Development of a conditional knockout mouse model (Sprr2f-cre Mig-6 f/f) to specifically ablate Mig-6 in uterine epithelial cells.
  • Administration of P4 to mutant mice to assess its effects on endometrial hyperplasia and AKT signaling.
  • In vitro experiments to analyze the interaction between MIG-6 and AKT phosphorylation.

Main Results:

  • Mice lacking epithelial Mig-6 developed endometrial hyperplasia, which was reversed by P4 treatment.
  • P4 treatment reduced cell proliferation, decreased AKT signaling, and restored stromal progesterone receptor (PGR) and estrogen receptor 1 (ESR1) expression.
  • In vitro studies confirmed that MIG-6 inhibits AKT phosphorylation and interacts with AKT.

Conclusions:

  • Endometrial epithelial cell proliferation is regulated by P4 through Mig-6-mediated inhibition of AKT phosphorylation.
  • This study uncovers novel mechanisms of P4 action in the endometrium.
  • Findings may inform the development of more effective non-surgical interventions for endometrial disorders.
Keywords:
AKTEndometrial hyperplasiaMIG-6Progesterone resistance

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