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Related Experiment Videos

Self tolerance to T cell receptor V beta sequences

F Falcioni1, D Vidović, E S Ward

  • 1Department of Inflammation/Autoimmune Diseases, Hoffmann-La Roche Inc., Nutley, New Jersey 07110, USA.

The Journal of Experimental Medicine
|July 1, 1995
PubMed
Summary
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This study shows T cell receptors (TCRs) are subject to self tolerance, like other self proteins. Tolerance applies to processed TCR peptides, impacting immune network research.

Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • T cell tolerance prevents autoimmunity by eliminating self-reactive lymphocytes.
  • Antigen receptors, like T cell receptors (TCRs), are self-proteins, but their tolerance status is debated.
  • It's unclear if TCRs induce immunity or tolerance through network interactions.

Purpose of the Study:

  • To investigate whether T cell receptors (TCRs) are subject to self tolerance.
  • To determine if tolerance applies to TCR-derived peptides and how processing affects this.

Main Methods:

  • Synthesizing peptides from V beta 8.1 and V beta 8.2 TCR regions.
  • Assessing T cell tolerance to these synthetic peptides.
  • Comparing tolerance to processed versus unprocessed V beta peptides.

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Main Results:

  • Demonstrated self tolerance to synthetic peptides from V beta 8.1 and V beta 8.2 TCRs.
  • Showed that tolerogenic peptides result from V beta protein processing.
  • Unprocessed V beta peptides did not induce self tolerance.

Conclusions:

  • The rules of self tolerance apply to germline-encoded portions of antigen receptors, similar to other self proteins.
  • Findings have implications for understanding natural and induced immune networks.
  • Suggests a mechanism for maintaining immune homeostasis involving TCR self-tolerance.