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Related Concept Videos

Formation of the Platelet Plug01:22

Formation of the Platelet Plug

10.4K
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...
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Structure and Function of Platelets01:18

Structure and Function of Platelets

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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...
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Inflammation01:38

Inflammation

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Overview
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Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

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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.
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Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

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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...
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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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...
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Related Experiment Video

Updated: Mar 18, 2026

An In Vitro Assay to Study Platelet Migration Using RGD-Functionalized Avidin-Biotin Tethers
05:43

An In Vitro Assay to Study Platelet Migration Using RGD-Functionalized Avidin-Biotin Tethers

Published on: November 8, 2024

889

Platelets in inflammation and atherogenesis.

Meinrad Gawaz1, Harald Langer, Andreas E May

  • 1Medizinische Klinik III, Eberhard Karls Universität Tübingen, Tübingen, Germany. meinrad.gawaz@med.uni-tuebingen.de

The Journal of Clinical Investigation
|December 3, 2005
PubMed
Summary

Platelets link inflammation and thrombosis, driving atherosclerosis. This review details how platelets

Area of Science:

  • Cardiovascular biology
  • Immunology
  • Hematology

Background:

  • Platelets are key mediators connecting inflammation, thrombosis, and the development of atherosclerosis.
  • Inflammation involves complex interactions between platelets, leukocytes, and endothelial cells (ECs).
  • These interactions promote leukocyte recruitment into the vascular wall, a critical step in atherogenesis.

Purpose of the Study:

  • To review the molecular mechanisms and inflammatory pathways by which platelets initiate and accelerate atherothrombosis.
  • To highlight the central role of platelets in the pathogenesis of atherosclerosis and thrombosis.

Main Methods:

  • This is a review article, synthesizing existing research.
  • Focuses on molecular machinery and inflammatory pathways involving platelets.

More Related Videos

Live-cell Imaging of Platelet Degranulation and Secretion Under Flow
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Live-cell Imaging of Platelet Degranulation and Secretion Under Flow

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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice

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Related Experiment Videos

Last Updated: Mar 18, 2026

An In Vitro Assay to Study Platelet Migration Using RGD-Functionalized Avidin-Biotin Tethers
05:43

An In Vitro Assay to Study Platelet Migration Using RGD-Functionalized Avidin-Biotin Tethers

Published on: November 8, 2024

889
Live-cell Imaging of Platelet Degranulation and Secretion Under Flow
11:42

Live-cell Imaging of Platelet Degranulation and Secretion Under Flow

Published on: July 10, 2017

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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice

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  • Integrates findings on platelet interactions with leukocytes and ECs.

    • Main Results:

    • Platelet activation, triggered by inflammatory stimuli, leads to autocrine and paracrine signaling.
    • Platelet-leukocyte-EC interactions facilitate chronic inflammation within the vascular wall.
    • This chronic inflammation is a direct driver for the formation of atherosclerotic lesions and atherothrombosis.

    Conclusions:

    • Platelets are pivotal in linking inflammation to thrombosis and atherosclerosis.
    • Understanding platelet-driven inflammatory pathways is crucial for targeting atherothrombosis.
    • Platelets' molecular machinery plays a significant role in accelerating cardiovascular disease progression.