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Natural regulatory T cells and self-tolerance
1Ronald H. Schwartz is with the National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA. rschwartz@niaid.nih.gov
Nature Immunology
|March 24, 2005
Summary
The adaptive immune system uses regulatory T cells to prevent self-attack, a mechanism crucial for distinguishing foreign pathogens from the body's own components.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- The adaptive immune system generates diverse receptors to fight pathogens.
- Random receptor generation poses a risk of self-recognition and autoimmunity.
- Current self-tolerance strategies primarily involve intrinsic cell deletion or inactivation.
Purpose of the Study:
- To explore the evolutionary basis of extrinsic dominant tolerance mediated by CD4(+) regulatory T cells.
- To discuss the challenges regulatory T cells present for self-non-self discrimination.
Main Methods:
- This is a perspective piece, relying on existing literature and theoretical frameworks.
- It synthesizes current understanding of immune regulation and self-tolerance.
Main Results:
- Extrinsic dominant tolerance, exemplified by regulatory T cells, is a key mechanism for maintaining self-tolerance.
- Regulatory T cells offer a complementary or alternative strategy to intrinsic cell-based tolerance.
Conclusions:
- The evolution of regulatory T cells suggests a sophisticated mechanism for managing self-reactivity.
- Understanding regulatory T cell function is critical for addressing autoimmune diseases and improving immune tolerance.