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Related Concept Videos

Non-Canonical Wnt Signaling Pathways01:41

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Non-Canonical Wnt Signaling Pathways01:41

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
Structure and Function of Platelets01:18

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...

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Updated: Jun 18, 2026

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
04:37

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

Published on: May 23, 2025

Canonical Wnt signaling negatively regulates platelet function.

Brian M Steele1, Matthew T Harper, Iain C Macaulay

  • 1Conway Institute, School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland.

Proceedings of the National Academy of Sciences of the United States of America
|November 11, 2009
PubMed
Summary
This summary is machine-generated.

Wnt signaling, previously unknown in platelets, inhibits platelet activation and aggregation. This discovery reveals a new role for Wnt pathways in blood and suggests potential antiplatelet therapies.

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Last Updated: Jun 18, 2026

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
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Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation

Published on: August 14, 2017

Area of Science:

  • Molecular Biology
  • Hematology
  • Cell Signaling

Background:

  • Wnt signaling pathways regulate crucial intracellular events.
  • Dysregulation of the Wnt pathway is implicated in various human diseases.
  • The role of Wnt signaling in platelets has not been previously explored.

Purpose of the Study:

  • To investigate the presence and function of Wnt signaling components in human platelets.
  • To determine the effect of Wnt3a ligand on platelet function.
  • To explore the Wnt-beta-catenin pathway's role in platelets.

Main Methods:

  • Detection of Wnt pathway components in human platelets.
  • Functional assays measuring platelet adhesion, activation, secretion, and aggregation.
  • Assessment of Wnt3a effects on platelet shape change and RhoA activation.
  • Analysis of platelet function in mice with disrupted Frizzled 6 receptor.

Main Results:

  • Wnt3a ligand was found to inhibit platelet adhesion, activation, dense granule secretion, and aggregation.
  • Wnt3a altered platelet shape change and inhibited RhoA activation.
  • The Wnt-beta-catenin signaling pathway is functional in platelets.
  • Disruption of the Frizzled 6 receptor in mice led to hyperactive platelets and reduced Wnt3a sensitivity.

Conclusions:

  • Wnt signaling plays a novel functional role in regulating anucleate platelet function.
  • Wnt pathway components are present and active in human platelets.
  • This research may offer a new target for antiplatelet therapies.