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Distinct TYRO3 and PROS1 expression levels contribute to preeclampsia pathogenesis.

Esma Kirimlioglu1, Ertan Katirci2,3, Mehmet Simsek4

  • 1Departments of Histology and Embryology, School of Medicine, Faculty of Medicine, Akdeniz University, Antalya, Turkey. esmakirimlioglu@gmail.com.

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PubMed
Summary

Preeclampsia (PE) involves inflammation and immune responses. TYRO3 and PROS1 signaling disruptions may increase PE risk, with altered levels observed in preeclamptic placentae.

Keywords:
GAS6MERTKPROS1PlacentaPreeclampsiaTYRO3

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Area of Science:

  • Obstetrics and Gynecology
  • Immunology
  • Cell Biology

Background:

  • Preeclampsia (PE) is a severe pregnancy complication linked to inflammation and immune responses.
  • TYRO3 and PROS1 are proteins involved in clearing apoptotic cells and suppressing inflammation.
  • Dysregulation of TYRO3/PROS1 signaling is hypothesized to contribute to PE development.

Purpose of the Study:

  • To investigate the role of TYRO3/PROS1 signaling in preeclampsia.
  • To compare TYRO3 and PROS1 expression and localization in healthy and preeclamptic placentae.

Main Methods:

  • Analysis of placental tissue morphology (H&E staining).
  • Quantification of TYRO3, MERTK, PROS1, and GAS6 mRNA levels via qPCR.
  • Immunohistochemical (IHC) staining to determine TYRO3 and PROS1 protein localization and expression.

Main Results:

  • Increased mRNA levels of TYRO3, MERTK, PROS1, and GAS6 were found in preeclamptic placentae (PP) compared to healthy placentae (HP).
  • TYRO3 protein expression was elevated in PP, localized in extravillous trophoblast (EVT) and syncytiotrophoblast (SCT) cells.
  • PROS1 was present in HP fetal vessels but absent in PP; reduced PROS1 was noted in the PE cytotrophoblast layer.

Conclusions:

  • Altered TYRO3/PROS1 signaling is implicated in PE pathogenesis.
  • Reduced PROS1 in PE placentae may compromise the blood-placental barrier and suggest complement activation/thrombosis.
  • TYRO3, MERTK, PROS1, and GAS6 may play a role in regulating inflammation, apoptosis, thrombosis, and barrier function in PE.