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Related Experiment Video

Updated: Nov 11, 2025

Isolation of Human Endometrial Stromal Cells for In Vitro Decidualization
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TORC2/3-mediated DUSP1 upregulation is essential for human decidualization.

Chunfang Xu1, Weijie Zhao1,2, Xixi Huang1

  • 1Laboratory for Reproductive Immunology, NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, People's Republic of China.

Reproduction (Cambridge, England)
|March 29, 2021
PubMed
Summary

Dual specificity phosphatase 1 (DUSP1) is crucial for endometrial decidualization by regulating mitogen-activated protein kinase (MAPK) signaling. Reduced DUSP1 in recurrent miscarriage (RM) patients suggests its role in pregnancy complications.

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Area of Science:

  • Reproductive Biology
  • Molecular Endocrinology
  • Cell Signaling

Background:

  • Decidualization is essential for embryo development, and its defects are linked to recurrent miscarriage (RM).
  • Dual specificity MAPK phosphatases (MKPs) regulate MAPK signaling, a key pathway in cellular processes.
  • DUSP1, an MKP, is investigated for its role in human endometrial stromal cell (ESC) decidualization.

Purpose of the Study:

  • To investigate the role of DUSP1 in ESC decidualization.
  • To elucidate the signaling pathways regulating DUSP1 expression.
  • To examine DUSP1's involvement in the pathogenesis of RM.

Main Methods:

  • RNA sequencing (RNA-seq) to identify differentially expressed MKPs.
  • db-cAMP treatment of ESCs to induce decidualization.
  • Inhibitor studies (H-89, ESI-09) and siRNA knock-down (DUSP1, TORC2/3, CREB).
  • Western blot analysis of DUSP1, phospho-JNK, and IGFBP1 in ESCs and patient samples.

Main Results:

  • DUSP1 expression was significantly upregulated by db-cAMP in ESCs in a dose- and time-dependent manner.
  • DUSP1 induction by db-cAMP involved the cAMP/Protein Kinase A (PKA) and TORC2/3 signaling pathways.
  • DUSP1 and TORC2/3 knock-down led to JNK overactivation and decreased IGFBP1 expression, indicating impaired decidualization.
  • Reduced DUSP1 and elevated JNK activity were observed in decidual stromal cells (DSCs) from RM patients.

Conclusions:

  • TORC2/3-mediated DUSP1 upregulation via cAMP/PKA signaling protects IGFBP1 expression by inhibiting JNK activity during ESC decidualization.
  • Aberrant DUSP1 expression in DSCs may contribute to the pathogenesis of RM.
  • DUSP1 is a critical regulator of endometrial decidualization and a potential biomarker for RM.