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A trip through my life with an immunological theme
1Section of Immunobiology, Yale University School of Medicine and Howard Hughes Medical Institute, 310 Cedar Street, New Haven, Connecticut 06520-8011, USA. Charles.Janeway@yale.edu
Annual Review of Immunology
|February 28, 2002
Summary
The innate immune system prevents self-antigen mistaken identity, while the adaptive immune system, involving T and B lymphocytes, can err due to somatic cell selection. Regulatory T cells are key defenses against autoimmunity.
Area of Science:
- Immunology
- Cellular Biology
- Autoimmunity
Background:
- The innate immune system's regulation of CD80 and CD86 molecules prevents mistaken identity of pathogens as self-antigens.
- The adaptive immune system, comprising T lymphocytes and B lymphocytes, can exhibit self-reactivity due to selection processes in single somatic cells.
Discussion:
- Adaptive immunity is inherently referential to self, being selected on, persisting via, and often dependent on self-ligands for T cells.
- Regulatory T cells, predicted to be crucial for preventing autoimmunity, recognize antigens and secrete immunoregulatory cytokines like IL-10 and TGF-beta.
Key Insights:
- Innate immunity provides robust self-tolerance through costimulatory molecule regulation.
- Adaptive immune system's self-tolerance mechanisms are complex and susceptible to errors.
- Regulatory T cells are essential for maintaining immune homeostasis and preventing autoimmune diseases.
Outlook:
- Further research into regulatory T cell function could reveal novel therapeutic targets for autoimmune disorders.
- Understanding the interplay between innate and adaptive immunity in self-tolerance is critical for advancing immunology.