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Residual public repertoires to self
S S Wilson1, P van den Elzen, E Maverakis
1La Jolla Institute for Allergy and Immunology, Division of Immune Regulation, 10355 Science Center Drive, San Diego, CA 92121, USA.
Journal of Neuroimmunology
|June 16, 2000
Summary
The T cell receptor repertoire includes self-directed T cells, crucial for immune regulation. Research explores "silent" self-antigens that evade T cell detection due to presentation or T cell receptor avidity.
Area of Science:
- Immunology
- Molecular Biology
- Autoimmunity
Background:
- The T cell receptor (TcR) repertoire's composition has undergone significant reevaluation.
- Autoimmunity research established the existence of a self-antigen-directed T cell repertoire, though its full extent was initially underestimated.
Purpose of the Study:
- To investigate the specific antigenic targets of the self-directed T cell repertoire.
- To understand the factors influencing the selection and deletion of T cells within the organism.
Main Methods:
- Analysis of T cell receptor repertoire.
- Investigation of antigenic determinant display hierarchy.
- Examination of T cell processing and presentation mechanisms.
- Assessment of T cell receptor avidity and target specificity.
Main Results:
- The non-tolerized, self-directed T cell repertoire arises from the hierarchy of antigenic determinant display.
- Certain antigenic determinants remain "silent" and are not recognized by T cells in the thymus or periphery.
- Factors contributing to determinant "silence" include processing/presentation issues and T cell receptor avidity.
Conclusions:
- The display of antigenic determinants significantly influences T cell repertoire selection and deletion.
- Understanding "silent" determinants is key to comprehending the self-directed T cell repertoire.
- T cell receptor-antigen interactions, including avidity, play a critical role in immune tolerance and autoimmunity.