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Related Concept Videos

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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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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Related Experiment Video

Updated: Apr 16, 2026

Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
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Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells

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New frontiers for platelet CD154.

Antoine Dewitte1, Annabelle Tanga2, Julien Villeneuve3

  • 1INSERM U1026, and Université de Bordeaux, F-33000 Bordeaux, France ; Service d'Anesthésie-Réanimation II, CHU de Bordeaux, F-33600 Pessac, France.

Experimental Hematology & Oncology
|March 13, 2015
PubMed
Summary
This summary is machine-generated.

Platelets are key immune cells beyond blood clotting. Their mediator CD154 is crucial for inflammation, immunity, and cancer, opening new research avenues.

Keywords:
CD154Platelets

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Area of Science:

  • Immunology
  • Hematology
  • Oncology

Background:

  • Platelets are recognized for their role in hemostasis.
  • Emerging evidence highlights platelet involvement in inflammation, immune responses, and cancer.
  • Platelet-derived mediators are crucial for these diverse functions.

Purpose of the Study:

  • To explore the multifaceted roles of platelets beyond hemostasis.
  • To investigate the significance of CD154 (platelet-derived growth factor receptor alpha) in platelet functions.
  • To provide an overview of novel research frontiers concerning platelet CD154.

Main Methods:

  • Literature review and synthesis of current research on platelet biology.
  • Analysis of the role of CD154 in various physiological and pathological processes.
  • Identification of key platelet-derived mediators and their functions.

Main Results:

  • Platelets significantly contribute to inflammation and tissue homeostasis.
  • Platelets play an unanticipated role in adaptive immunity, impacting autoimmune diseases.
  • Platelets are implicated in cancer progression and metastasis.
  • CD154 is a major platelet-derived mediator essential for these functions.

Conclusions:

  • Platelet CD154 is central to understanding platelet roles in inflammation, immunity, hematopoiesis, and cancer.
  • Further research into platelet CD154 promises new therapeutic strategies for various diseases.
  • Platelets represent a critical link between hemostasis, immunity, and disease pathogenesis.