Platelet Tissue Factor
Platelet Tissue Factor - Related Videos
10:08
Flow Cytometry Analysis of Tissue Factor Expression in Human Platelets
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Cited by 3 •
2024
This article outlines the protocol for quantifying the percentage of Tissue Factor (TF)-positive platelets using whole blood flow cytometry, assessing the protein: (1) intracellularly in resting conditions, and (2) on the cell surface, in both resting and activated conditions. Guidance is also provided for evaluating TF-positive platelets in platelet-rich plasma.
08:30
Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation
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Cited by 6 •
2017
In this paper, we describe a method to assess endothelial von Willebrand factor release and the subsequent platelet capture under fluid shear stress in response to inflammatory stimuli using an in vitro flow chamber system.
09:13
Turbidimetry on Human Washed Platelets: The Effect of the Pannexin1-inhibitor Brilliant Blue FCF on Collagen-induced Aggregation
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Cited by 5 •
2017
We describe a straightforward method for the isolation of washed platelets from human blood followed by agonist-induced platelet aggregation measurements by turbidimetry. As an example we apply this method for studying the aggregation response of human platelets to collagen after a pre-incubation with the Pannexin1 channel inhibitor Brilliant Blue FCF.
09:38
A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
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Cited by 16 •
2017
This paper describes an experimental model of hemostasis that simultaneously measures platelet function and coagulation. Platelet and fibrin fluorescence is measured in real-time, and platelet adhesion rate, coagulation rate, and onset of coagulation are determined. The model is used to determine platelet procoagulant properties under flow in concentrates for transfusion.
11:42
Live-cell Imaging of Platelet Degranulation and Secretion Under Flow
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Cited by 11 •
2017
This work describes a fluorescence microscopy-based method for the study of platelet adhesion, spreading, and secretion under flow. This versatile platform enables the investigation of platelet function for mechanistic research on thrombosis and hemostasis.
FAQs
When tissue factor becomes exposed or is transferred to a platelet surface, it binds factor VIIa and initiates activation of factor X. This leads to thrombin generation, which converts fibrinogen into fibrin. The resulting coagulation activity also reinforces platelet activation, linking cellular responses with formation of a more organized thrombus.
Association with platelets or platelet-derived microparticles places tissue factor on cellular surfaces involved in hemostasis. This positioning connects tissue factor activity with platelet biology rather than treating coagulation as an isolated plasma reaction. Studying where the factor is exposed or transferred can therefore clarify how platelet surfaces participate in thrombus formation.
Primary hemostasis depends on platelet participation, whereas the coagulation cascade generates fibrin through sequential factor activation. Platelet tissue factor provides a point of connection between these processes: its interaction with factor VIIa activates factor X, and subsequent thrombin production converts fibrinogen to fibrin. This coordination helps explain how cellular adhesion and coagulation cooperate after vascular injury.
Platelet-derived microparticles are one form in which tissue factor may be associated with platelet biology. Their inclusion broadens investigation beyond intact platelets and allows researchers to examine tissue factor that has been transferred through platelet-derived material. This perspective is relevant when analyzing how platelet-associated activity contributes to coagulation and thrombus formation.
Research examines how tissue factor associated with platelets or platelet-derived microparticles contributes to thrombin generation, fibrin formation, and platelet activation. These studies help connect platelet behavior with coagulation during vascular injury and inflammation. The resulting biological context can improve understanding of why clot formation becomes relevant to both thrombosis and bleeding disorders.
The topic is relevant to investigations of thrombosis, vascular injury, inflammation, and bleeding disorders. It may also support identification of biomarkers that reflect pathological clot formation or development of therapies designed to modulate such clotting selectively. The central challenge is to reduce harmful thrombosis while preserving the normal hemostatic response needed to limit bleeding.