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Elevated insulin levels compromise endometrial decidualization in mice with decrease in uterine apoptosis in

Chen Zhang1,2,3, Chengshun Yang1,2, Na Li1,2

  • 1Laboratory of Reproductive Biology, School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, China.

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Summary
This summary is machine-generated.

High insulin levels impair early pregnancy decidualization in mice by affecting endometrial markers and increasing apoptosis. The PI3K/Akt pathway is crucial, offering insights into hyperinsulinemia-related infertility.

Keywords:
ApoptosisDecidualizationEmbryo implantationEndometriumHyperinsulinemia

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Area of Science:

  • Reproductive biology
  • Endocrinology
  • Cellular and molecular biology

Background:

  • Hyperinsulinism and insulin resistance are linked to reduced female fertility.
  • The mechanisms behind compromised decidualization in early pregnancy remain unclear.
  • Aberrant endometrial decidualization is associated with pregnancy complications.

Purpose of the Study:

  • To investigate whether elevated insulin levels compromise endometrial decidualization in early pregnancy.
  • To elucidate the cellular and molecular mechanisms involved in insulin-induced decidualization defects.

Main Methods:

  • High-dose insulin administration to C57BL/6J mice and primary cell cultures.
  • Analysis of serum hormone levels, embryo implantation, and endometrial markers (BMP2, ER, PR).
  • Assessment of apoptosis, mitochondrial potential, and PI3K/Akt pathway activation via flow cytometry, electron microscopy, and Western blotting.

Main Results:

  • Elevated insulin levels significantly altered reproductive hormones and decreased implantation sites and decidual markers.
  • Insulin compromised decidualization in both mouse and human endometrial stromal cells.
  • Insulin treatment led to decreased decidual cell apoptosis and increased mitochondrial potential, mediated by the PI3K/Akt pathway.

Conclusions:

  • Elevated insulin levels compromise early pregnancy decidualization in mice.
  • The PI3K/Akt-regulated apoptosis pathway is essential for this effect.
  • Findings provide a basis for understanding and potentially treating infertility associated with hyperinsulinemia.