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

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Involvement of the JAK-STAT pathway in collagen regulation of decidual NK cells

Qiang Fu1, Yufei Sun1, Yu Tao2

  • 1Department of Immunology, Binzhou Medical University, Yantai, China.

American Journal of Reproductive Immunology (New York, N.Y. : 1989)
|October 5, 2017
PubMed
Abstract

Insights

Collagen via LAIR-1 signaling regulates decidual natural killer cells (dNKs) at the maternal-fetal interface. This pathway, involving JAK-STAT signaling, influences T-bet and Helios expression, promoting immune tolerance.

Area of Science:

  • Reproductive Immunology
  • Maternal-Fetal Interface Biology
  • Innate Immune Cell Function

Background:

  • Decidual natural killer cells (dNKs) play a critical role in pregnancy success.
  • The precise molecular mechanisms regulating dNK function at the maternal-fetal interface remain incompletely understood.
  • Understanding these mechanisms is crucial for addressing pregnancy complications.

Purpose of the Study:

  • To elucidate the regulatory mechanisms of decidual natural killer cells (dNKs) at the maternal-fetal interface.
  • To investigate the role of collagen and its interaction with LAIR-1 in dNK function.
  • To identify the signaling pathways involved in dNK regulation.

Main Methods:

  • Coculture of primary trophoblasts (TROs), decidual stromal cells (DSCs), and dNKs.
  • Inhibition of LAIR-1 using LAIR-2 and collagen using P4H shRNA.
  • Analysis of Th1 cytokine production, JAK-STAT pathway activation, and transcription factor expression (T-bet, Helios).

Main Results:

  • Coculture of dNKs with TROs/DSCs downregulated Th1 cytokine production.
  • This downregulation was reversed by LAIR-1 inhibition (LAIR-2) and collagen inhibition (P4H shRNA).
  • Collagen/LAIR-1 interaction activates SHP-1, JAK1/JAK2, leading to decreased STAT1/STAT4 phosphorylation and reduced T-bet/Helios expression in dNKs.

Conclusions:

  • The JAK-STAT pathway, including T-bet and Helios, is implicated in collagen/LAIR-1-mediated regulation of dNK function.
  • This signaling pathway is a potential contributor to immune tolerance at the maternal-fetal interface.
  • Findings provide novel insights into the molecular crosstalk regulating immune cells during pregnancy.
Keywords:
JAK-STATLAIR-1collagendecidual NK cells

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