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Related Experiment Video

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Isolation of Primary Human Decidual Cells from the Fetal Membranes of Term Placentae
07:37

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Published on: April 30, 2018

Pericellular-acting proteases in human first trimester decidua.

Margreet Plaisier1, Pieter Koolwijk, Florian Willems

  • 1Division of Reproductive Medicine, Department of Gynaecology, Leiden University Medical Centre, PO Box 9600, 2300 RC, Leiden, The Netherlands. M.Plaisier@lumc.nl

Molecular Human Reproduction
|January 8, 2008
PubMed
Summary

This study investigated proteases like membrane-type matrix metalloproteinases (MT-MMPs) and urokinase-type plasminogen activator (uPA) in early pregnancy decidua. Findings reveal their differential expression, crucial for decidual development and implantation.

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Area of Science:

  • Reproductive Biology
  • Cell Biology
  • Biochemistry

Background:

  • Proteolysis is vital for embryonic implantation and decidual development.
  • Limited knowledge exists on membrane-type matrix metalloproteinases (MT-MMPs) and urokinase-type plasminogen activator (uPA)/uPAR in the decidua.

Purpose of the Study:

  • To analyze the expression and levels of MT-MMPs and uPA/uPAR in first-trimester human decidual tissues.
  • To correlate protease expression with immune cell presence (uNK cells, macrophages) and extravillous trophoblasts (EVT).

Main Methods:

  • RT-PCR and immunohistochemistry were used to detect mRNA and protein levels of uPA, uPAR, and MT1/2/3/5-MMP.
  • Quantification of CD56-positive uNK cells and CD68-positive macrophages in serial decidual sections.
  • Analysis of three distinct first-trimester decidual tissues: decidual secretory endometrium (DSE), decidua parietalis (DP), and decidua basalis (DB).

Main Results:

  • All studied proteases and uPAR were detected in decidual tissues and EVT.
  • mRNA levels of most proteases and uPAR were higher in DB and DP compared to DSE, with significant increases for MT1-MMP and uPAR in DP.
  • Protein levels of uPA and uPAR were notably elevated in DB, while pro-angiogenic MT1- and MT3-MMPs were increased in DB and DP. MT2-MMP was abundant across all tissues.

Conclusions:

  • Decidual protease expression, including MT-MMPs and uPA/uPAR, is differentially regulated during early pregnancy.
  • Pregnancy hormones, immune cells (uNK cells), and EVT likely influence this regulation.
  • These findings provide insights into the role of pericellular proteases in decidual development and successful implantation.