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Related Concept Videos

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant 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...
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Disorders of Hemostasis

Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
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Structure and Function of Platelets01:18

Structure and Function of Platelets

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Extrinsic and Intrinsic Pathways of Hemostasis

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The Extrinsic Pathway
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Introduction to Hemostasis01:05

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Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...

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Updated: May 20, 2026

Ferric Chloride-induced Murine Thrombosis Models
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Published on: September 5, 2016

Immune thrombocytopenia: pathophysiologic and clinical update.

Roberto Stasi1

  • 1Department of Haematology, St George's Hospital, London, UK. roberto.stasi@stgeorges.nhs.uk

Seminars in Thrombosis and Hemostasis
|July 4, 2012
PubMed
Summary

Immune thrombocytopenia (ITP) is an autoimmune disease affecting platelet production and survival. Advances in treatment include rituximab and thrombopoietin-receptor agonists, offering options beyond splenectomy.

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Area of Science:

  • Immunology
  • Hematology

Background:

  • Immune thrombocytopenia (ITP) is an autoimmune disorder impacting platelet count and production.
  • It involves autoantibodies against platelet glycoproteins, leading to platelet destruction and suppressed megakaryopoiesis.
  • ITP can be primary or secondary to various conditions, including infections and other autoimmune diseases.

Purpose of the Study:

  • To summarize the pathophysiology of Immune thrombocytopenia (ITP).
  • To highlight recent therapeutic advancements in managing chronic ITP.

Main Methods:

  • Review of existing literature on ITP pathophysiology.
  • Analysis of recent clinical trial data for ITP treatments.

Main Results:

  • ITP involves autoantibodies, T-cell dysfunction (Th1 bias, reduced Treg activity), and potentially dysfunctional mesenchymal stem cells.
  • Newer treatments like rituximab and thrombopoietin-receptor agonists show significant efficacy in chronic ITP.

Conclusions:

  • Understanding the complex immune mechanisms in ITP is crucial for developing targeted therapies.
  • Effective medical treatments are now available for chronic ITP, providing alternatives to splenectomy.