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Related Experiment Video

Updated: Jun 14, 2026

Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting

Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting

Published on: May 1, 2015

Platelets regulate lymphatic vascular development through CLEC-2-SLP-76 signaling.

Cara C Bertozzi¹, Alec A Schmaier, Patricia Mericko

¹Department of Medicine and Cardiovascular Institute, University of Pennsylvania, 421 Curie Blvd., Philadelphia, PA 19104, USA.

|April 6, 2010

Summary

Platelets regulate embryonic lymphatic vascular development by binding to lymphatic endothelial cells via CLEC-2 receptors. This interaction activates SLP-76 signaling in platelets, crucial for blood-lymphatic vessel separation.

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Published on: April 9, 2018

Area of Science:

Developmental Biology
Hematology
Vascular Biology

Background:

Platelets emerge by embryonic day 10.5 in mice, but their embryonic role remains unclear.
The SYK-SLP-76 signaling pathway is essential for embryonic blood-lymphatic vascular separation, yet the specific cell type and mechanism are unknown.

Purpose of the Study:

To elucidate the role of platelets in embryonic lymphatic vascular development.
To identify the molecular mechanism by which platelets regulate blood-lymphatic vascular separation.

Main Methods:

Investigated platelet interaction with lymphatic endothelial cells using C-type lectin-like receptor 2 (CLEC-2) and Podoplanin (PDPN).
Utilized genetic manipulation (Platelet factor 4-Cre-mediated deletion of Slp-76) to assess the role of SLP-76 signaling in platelets.
Observed platelet aggregation on lymphatic endothelial cells in vivo and ex vivo.

Main Results:

Platelets directly interact with lymphatic endothelial cells through CLEC-2 receptors, binding to PDPN.
Loss of CLEC-2 function in platelets phenocopies defects seen in PDPN or SLP-76 deficient models.
SLP-76 signaling in platelets is essential for regulating lymphatic vascular development, evidenced by defects upon its genetic deletion.

Conclusions:

Platelets play a critical role in embryonic lymphatic vascular development.
Platelet CLEC-2 receptors binding to lymphatic endothelial PDPN activates SLP-76 signaling, mediating blood-lymphatic vascular separation.
This study reveals a novel non-hemostatic function of platelets in regulating embryonic vascular development.