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The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
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Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
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Aire and T cell development.

Mark S Anderson1, Maureen A Su

  • 1Diabetes Center and Department of Medicine, University of California, San Francisco, San Francisco, CA, USA. manderson@diabetes.ucsf.edu

Current Opinion in Immunology
|December 18, 2010
PubMed
Summary
This summary is machine-generated.

The Autoimmune Regulator (Aire) gene is crucial for preventing autoimmunity by enabling the thymus to display tissue-specific antigens, thereby deleting self-reactive T cells. Advances clarify Aire

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Developing T cells undergo negative selection in the thymus to eliminate high-affinity self-reactive cells.
  • This process requires the presentation of self-antigens, including tissue-specific ones, within the thymus.
  • The Autoimmune Regulator (Aire) gene is essential for expressing these tissue-specific antigens in the thymus.

Purpose of the Study:

  • To summarize recent advances in understanding the role of Aire in central tolerance.
  • To elucidate Aire's function in the expression of tissue-specific antigens and its impact on T cell selection.
  • To clarify the mechanisms and cellular players involved in Aire-mediated negative selection.

Main Methods:

  • Review of recent research on Aire function and its regulatory mechanisms.
  • Analysis of studies investigating Aire's role in gene expression and cellular differentiation.
  • Examination of findings related to antigen presentation and T cell interactions in the thymus.

Main Results:

  • Aire orchestrates the expression of thousands of tissue-specific antigens in the thymus.
  • Aire influences chemokine and cytokine expression, impacting the thymic microenvironment.
  • Key factors for medullary thymic epithelial cell differentiation and antigen presentation have been identified.

Conclusions:

  • Aire is a master regulator of central tolerance, crucial for preventing autoimmunity.
  • Medullary thymic epithelial cells play a vital role in presenting tissue-specific antigens via Aire.
  • Recent findings provide a clearer picture of Aire's multifaceted roles in T cell development and self-tolerance.