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Related Concept Videos

Cellular Injury IlI: Cellular Death01:11

Cellular Injury IlI: Cellular Death

Cell death is the irreversible loss of cellular structure and function, representing the final stage of severe injury. It plays a key role in both normal physiology and disease.Types of Cell DeathThe two main types are necrosis and apoptosis, though others like necroptosis and pyroptosis also exist.Necrosis:Necrosis is an unregulated form of cell death caused by severe injury such as trauma, toxins, or ischemia. It is characterized by cell swelling, membrane loss, rupture, and leakage of...
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Necrosis is a form of irreversible cell death caused by severe injury such as ischemia, toxins, or trauma. Unlike programmed cell death, it is an uncontrolled, pathological process that typically provokes inflammation in surrounding tissues.Pathophysiologic ChangesNecrosis begins when cells sustain critical damage, leading to swelling of organelles, particularly mitochondria, and rapid ATP depletion. As energy levels decline, membrane ion pumps fail, leading to calcium influx and eventually,...
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Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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Cellular injury occurs when a cell cannot maintain homeostasis or adapt to stressors such as hypoxia, toxins, or trauma. Depending on severity and duration, injury may be reversible, allowing recovery, or irreversible, leading to cell death.General Mechanisms of Cell InjuryAlthough causes vary, most cellular injuries arise from a few key mechanisms that disrupt essential functions and often amplify one another. Cell survival depends on the extent and balance of these disturbances.ATP depletion...
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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.
Thromboembolic Disorders
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Updated: May 8, 2026

Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
09:46

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

Published on: December 27, 2017

Cellular immune dysfunction in immune thrombocytopenia (ITP).

Christopher G J McKenzie1, Li Guo, John Freedman

  • 1Toronto Platelet Immunobiology Group, University of Toronto, Toronto, ON, Canada; Keenan Research Centre in the Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, ON, Canada; Canadian Blood Services, University of Toronto, Toronto, ON, Canada.

British Journal of Haematology
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

This review explores immune cell roles in immune thrombocytopenia (ITP). It examines how antigen-presenting cells (APCs), T cells, and B cells interact to cause and sustain chronic ITP, including genetic factors and animal models.

Keywords:
B cellsImmune thrombocytopenia (ITP)T cellsantigen presenting cellsautoimmunity

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Published on: December 27, 2017

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Human In Vitro Suppression as Screening Tool for the Recognition of an Early State of Immune Imbalance

Published on: July 22, 2011

Area of Science:

  • Immunology
  • Hematology

Background:

  • Immune thrombocytopenia (ITP) is an autoimmune disorder characterized by low platelet counts.
  • The precise role of immune system abnormalities in ITP pathogenesis remains debated, with uncertainty regarding causative versus secondary roles.

Purpose of the Study:

  • To review recent advances in understanding the pathophysiology of ITP.
  • To elucidate the roles and interactions of antigen-presenting cells (APCs), T cells, and B cells in ITP initiation and perpetuation, particularly chronic ITP.

Main Methods:

  • Literature review of recent advances in ITP research.
  • Focus on immune cell interactions, genetics, and animal models.

Main Results:

  • Abnormalities in APCs, T cells, and B cells are implicated in ITP.
  • These immune cells interact to initiate and perpetuate the disease, especially chronic forms.

Conclusions:

  • Understanding the interplay of APCs, T cells, and B cells is crucial for ITP pathophysiology.
  • Further research into genetics and animal models may offer new insights into ITP treatment.