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Related Concept Videos

Immunodeficiency Diseases01:25

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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Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...
Type I Diabetes I: Introduction01:12

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Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...

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Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity
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Primary immunodeficiency and autoimmunity: lessons from human diseases.

G J Arason1, G H Jorgensen, B R Ludviksson

  • 1Department of Immunology, Landspitali University Hospital, Hringbraut, Reykjavik, Iceland.

Scandinavian Journal of Immunology
|May 27, 2010
PubMed
Summary

Primary immunodeficiency diseases (PIDs) involve defects in immune cells and complement. Certain PIDs strongly link to autoimmune diseases, suggesting shared mechanisms and highlighting the role of immune regulation in maintaining self-tolerance.

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Area of Science:

  • Immunology
  • Genetics
  • Autoimmunity

Background:

  • Primary immunodeficiency diseases (PIDs) are a diverse group of over 150 genetic disorders affecting the immune system.
  • PIDs are frequently associated with the development of autoimmune diseases.
  • Understanding the interplay between PIDs and autoimmunity is crucial for disease management.

Purpose of the Study:

  • To explore the relationship between primary immunodeficiency diseases affecting T-regulatory cells, complement, and B cells, and their associated autoimmune conditions.
  • To investigate potential cause-effect relationships between specific PIDs and autoimmune manifestations.
  • To discuss the immunological mechanisms underlying these associations.

Main Methods:

  • Review and description of primary immunodeficiency diseases affecting T-regulatory cells, complement, and B cells.
  • Analysis of the association between specific PIDs and autoimmune diseases, such as systemic lupus erythematosus.
  • Discussion of laboratory evidence and immunological principles.

Main Results:

  • Defects in T-regulatory cells show a high concordance with organ-specific autoimmune diseases, indicating their critical role in maintaining tolerance.
  • Congenital defects in early complement components (C1q, C1r/s, C4) are strongly linked to systemic lupus erythematosus, emphasizing the importance of the classical pathway in preventing immune complex disease.
  • The link between primary antibody deficiencies and autoimmunity is less clear, possibly involving shared genetic factors or intense antigen load.

Conclusions:

  • T-regulatory cell defects are essential for tolerance to epithelial and endocrine tissues.
  • Classical complement pathway activity is vital for the safe elimination of immune complexes and prevention of immune complex disease.
  • While direct causation is debated for some PIDs, shared immunological mechanisms may underlie many autoimmune diseases.