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Updated: Dec 18, 2025

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Platelet CLEC-2 and lung development.

Katsue Suzuki-Inoue1, Nagaharu Tsukiji1

  • 1Department of Clinical and Laboratory Medicine Faculty of Medicine University of Yamanashi Chuo Japan.

Research and Practice in Thrombosis and Haemostasis
|June 18, 2020
PubMed
Summary
This summary is machine-generated.

Platelets actively influence embryonic development by releasing growth factors that are crucial for lung formation and blood/lymphatic vessel separation. This highlights platelets

Keywords:
CLEC‐2lung developmentlymphatic endothelial cellsplateletspodoplanin

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Area of Science:

  • Developmental Biology
  • Hematology
  • Cell Biology

Background:

  • Blood cells, particularly platelets, are increasingly recognized for their active roles beyond transport during embryonic development.
  • Platelet CLEC-2 (C-type lectin-like receptor 2) interacts with podoplanin (PDPN) on lymphatic endothelial cells (LECs).
  • This interaction is critical for proper lung development and vascular system separation.

Purpose of the Study:

  • To review the role of platelet CLEC-2 in embryonic lung development and vascular morphogenesis.
  • To elucidate the mechanism by which platelets influence cell differentiation and tissue formation.
  • To highlight the function of platelet-derived transforming growth factor-beta (TGF-β) in developmental processes.

Main Methods:

  • Review of the State of the Art lecture presented at the ISTH congress 2019.
  • Analysis of findings from mouse models with deleted platelet CLEC-2.
  • Examination of receptor-ligand interactions (CLEC-2/PDPN) and downstream signaling (TGF-β).

Main Results:

  • Deletion of platelet CLEC-2 in mice leads to lung malformation and impaired blood/lymphatic vessel separation, resulting in perinatal death.
  • Platelet activation via CLEC-2/PDPN binding on LECs releases TGF-β, inhibiting LEC migration and promoting vascular separation.
  • TGF-β also drives lung mesothelial cell differentiation into myofibroblasts, essential for lung elasticity and inflation.

Conclusions:

  • Platelets are essential regulators of embryonic lung development, acting as a natural drug delivery system.
  • The CLEC-2/PDPN interaction is a key pathway for platelet-mediated TGF-β release during development.
  • This mechanism ensures proper lung structure and vascular network formation, critical for postnatal survival.