Related Experiment Video
Updated: May 9, 2026
10:37
Ferric Chloride-induced Murine Thrombosis Models
Published on: September 5, 2016
Superactivated platelets: thrombus regulators, thrombin generators, and potential clinical targets.
Marshall Mazepa1, Maureane Hoffman, Dougald Monroe
1Department of Pathology, University of North Carolina Hospitals, Chapel Hill, NC 27599, USA. mmazepa@unch.unc.edu
Arteriosclerosis, Thrombosis, and Vascular Biology
|July 19, 2013
Summary
Platelets form plugs and aid clotting. Superactivated platelets, a distinct subpopulation, show enhanced procoagulant activity and may regulate thrombus formation, offering potential therapeutic targets.
Area of Science:
- Hematology
- Biochemistry
- Cell Biology
Background:
- Platelets are crucial for hemostasis, forming plugs and promoting coagulation.
- Platelet procoagulant response is a complex process involving thrombin generation.
- Platelets possess catalytic surfaces essential for efficient thrombin production.
Purpose of the Study:
- To review the nuanced platelet procoagulant response.
- To examine platelet behavior under strong stimuli.
- To understand the properties and roles of superactivated platelets.
Main Methods:
- Literature review of platelet function and activation.
- Analysis of platelet subpopulations.
- Examination of platelet procoagulant activity and thrombus formation.
Main Results:
- Strong stimuli generate superactivated platelets, a unique subpopulation.
- Superactivated platelets exhibit enhanced procoagulant activity.
- These platelets influence thrombus architecture and regulation.
Conclusions:
- Superactivated platelets have distinct properties and roles in thrombosis.
- Their contribution to hemostatic and thrombotic diseases is currently unknown.
- Superactivated platelets represent a potential pharmacological target.
More Related Videos
Related Concept Videos
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
01:20Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
01:16Clot Retraction and Fibrinolysis
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
01:22Formation 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...
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...
01:18Structure 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...
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...
01:09Coagulation
The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...