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Related Experiment Videos

Interleukin-17 expression in the human placenta.

S Pongcharoen1, J Somran, S Sritippayawan

  • 1Department of Medicine, Naresuan University, Phitsanulok, Thailand.

Placenta
|March 22, 2006
PubMed
Summary
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Interleukin-17 (IL-17), a key inflammatory cytokine, is expressed in human placental cells. This finding suggests IL-17 plays a role in pregnancy establishment through angiogenesis and immune regulation.

Area of Science:

  • Reproductive Immunology
  • Cytokine Biology
  • Human Placental Development

Background:

  • Interleukin-17 (IL-17) is a pro-inflammatory cytokine known to induce neovascularization and proangiogenic factors.
  • Pregnancy success hinges on cytokine balance (Th1/Th2) and adequate fetoplacental blood supply.

Purpose of the Study:

  • To investigate the expression and localization of IL-17 mRNA and protein within human placental tissues.
  • To determine the potential role of IL-17 in pregnancy establishment.

Main Methods:

  • Purification of placental cells including cytokeratin-positive trophoblasts, HLA-G+ extravillous trophoblasts, and Hofbauer cells.
  • Detection of IL-17 mRNA expression.
  • Immunohistochemical localization of IL-17 protein in placental tissues from normal term pregnancy, spontaneous miscarriage, and molar pregnancy.

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Main Results:

  • IL-17 mRNA was detected in placental trophoblast cells and Hofbauer cells.
  • IL-17 protein was localized in cyto- and syncytiotrophoblasts across all pregnancy types studied.
  • Extravillous trophoblast cells consistently showed IL-17 immunoreactivity, particularly in miscarriage and molar pregnancy.

Conclusions:

  • IL-17 is expressed in various human placental cell types.
  • IL-17 expression in the placenta may be crucial for regulating angiogenesis.
  • IL-17 could play a significant role in the immunoregulation necessary for successful pregnancy establishment.