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Related Concept Videos

Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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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

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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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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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Introduction to Hemostasis01:05

Introduction to Hemostasis

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Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
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Related Experiment Video

Updated: Apr 15, 2026

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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Platelets in inflammation and atherogenesis.

Henry M Nording1, Peter Seizer2, Harald F Langer1

  • 1University Clinic for Cardiology and Cardiovascular Medicine, Eberhard Karls-University Tübingen , Tübingen , Germany ; Section for Cardioimmunology, Eberhard Karls-University Tübingen , Tübingen , Germany.

Frontiers in Immunology
|March 24, 2015
PubMed
Summary
This summary is machine-generated.

Platelets are immune cells involved in host defense and infectious diseases. This review explores their role in inflammation, atherosclerosis, and vascular remodeling.

Keywords:
atherosclerosisinflammationplatelets

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Area of Science:

  • Immunology
  • Hematology
  • Vascular Biology

Background:

  • Platelets are primarily known for thrombosis.
  • Emerging evidence suggests significant immune functions for platelets.
  • Their role in inflammation and disease beyond clotting is increasingly recognized.

Purpose of the Study:

  • To review the immune functions of platelets.
  • To examine platelet involvement in host defense and infectious diseases.
  • To highlight platelet interactions in atherosclerosis and vascular remodeling.

Main Methods:

  • Literature review of platelet immune functions.
  • Analysis of platelet interactions with other immune cells.
  • Examination of platelet roles in inflammatory vascular diseases.

Main Results:

  • Platelets act as immune cells in host defense and infectious diseases.
  • Platelet crosstalk with immune cells is crucial.
  • Platelets significantly contribute to atheroprogression and vascular remodeling.

Conclusions:

  • Platelets possess critical immune functions beyond hemostasis.
  • Platelet-mediated inflammation plays a key role in atherosclerosis.
  • Understanding platelet roles offers translational insights for vascular diseases.