Platelet Attachment
Platelet Attachment - Related Videos
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.
01:20
Attachment
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2025
Attachment is vital for infant development, as warm social interactions support growth and well-being. In a classic 1958 study by Harry Harlow, the significance of warmth and comfort in forming attachments was examined. Harlow separated newborn monkeys from their mothers and provided two artificial "mothers": one made of cold wire and the other covered in soft cloth. Despite the wire mother offering food, the infant monkeys preferred the comfort of the cloth mother, demonstrating that physical...
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 13 •
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.
08:14
Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial
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Cited by 38 •
2015
Leucocyte-Platelet Rich Fibrin (L-PRF) represents an FDA cleared preparation of autologous platelet concentrates that possesses unique fibrin architecture, enriched platelets and abundant growth factors. Here, we present a protocol for chair-side generation of L-PRF as well as evaluate its mechanical properties including uniaxial testing and suture retention strength testing.
03:58
Purification and Activation of Platelets from Murine Whole Blood
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2025
In this video, we describe a protocol for purifying platelets from murine whole blood and their subsequent activation with the platelet agonist thrombin. When analyzed with flow cytometry, the purified resting platelets are characterized based on the expression of their cell-surface marker CD41, whereas purified activated platelets co-express both the surface markers CD41 and CD62P.
FAQs
Surface injury changes the molecular interactions available to circulating platelets. Exposed collagen allows von Willebrand factor, or vWF, to act as a tether by connecting platelets through the GPIb-IX-V receptor. This initial binding is reinforced when collagen receptors GPVI and integrin α2β1 engage the damaged surface, converting contact into stronger attachment and initiating platelet signaling.
The receptors contribute different stages of the response. GPIb-IX-V supports initial tethering through vWF, whereas GPVI and integrin α2β1 strengthen interactions with collagen and promote intracellular signaling. Their combined activity helps platelets remain associated with the altered vascular surface while preparing them for activation, shape change, and participation in clot growth.
Attachment initiates intracellular signaling that activates the platelets. They change shape, release granule contents, and engage integrin αIIbβ3. This integrin supports interactions with additional platelets, so the initial attached cells can promote recruitment and contribute to progressive thrombus formation rather than remaining isolated at the injury site.
Investigating platelet attachment reveals how the early stages of hemostasis develop after vascular damage. It connects receptor engagement with signaling, granule release, platelet recruitment, and clot growth. These observations help researchers examine normal bleeding control as well as the mechanisms that contribute to thrombosis and cardiovascular disease.
The same receptor-driven interactions that help control bleeding can also support excessive thrombus formation when platelet recruitment and clot growth become clinically problematic. Examining attachment therefore provides a biological link between protective hemostasis and disease-related thrombosis, helping researchers distinguish useful platelet responses from processes associated with cardiovascular disease.
Receptor engagement identifies stages at which platelet responses can be examined or modified. Studying vWF-mediated tethering, collagen receptor signaling, and αIIbβ3 engagement clarifies how attachment progresses toward recruitment and clot growth. This mechanistic information supports the development of antiplatelet therapies designed to influence platelet participation in thrombus formation.
Blood-contacting biomaterials can be studied in relation to the platelet responses that follow surface contact. Measuring or interpreting attachment is relevant because platelet binding can lead to activation, granule release, recruitment, and clot growth. This biological context helps connect material-surface interactions with the potential for thrombus formation and informs biomaterial research.