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Related Experiment Videos

Alternative T cell receptor gene usage induced by self tolerance.

B Frangoulis1, M Pla, H G Rammensee

  • 1Max-Planck-Institut für Biologie, Abteilung Immungenetik, Tübingen.

European Journal of Immunology
|March 1, 1989
PubMed
Summary

Self tolerance shapes T cell receptor gene usage in response to foreign antigens. While C57BL/6 mice primarily use V beta 6 genes for H-Y antigen response, (DBA/2 x C57BL/6)F1 mice utilize different genes, demonstrating repertoire bias without impairing immunity.

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Area of Science:

  • Immunology
  • T cell receptor repertoire
  • Self-tolerance

Background:

  • T cell receptor (TCR) gene usage is crucial for adaptive immunity.
  • Mls-1a is a known self antigen that can induce T cell tolerance.
  • H-Y antigen is a male-specific antigen recognized by T cells.

Purpose of the Study:

  • To investigate the impact of self tolerance on TCR gene usage in response to foreign antigens.
  • To determine if Mls-1a expression affects the T cell response to H-Y antigen.

Main Methods:

  • Generation of Ab-restricted, H-Y-specific T cell clones from C57BL/6 mice.
  • Analysis of TCR gene usage in T cell clones.
  • Assessment of immune response in (DBA/2 x C57BL/6)F1 mice expressing Mls-1a.

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Main Results:

  • C57BL/6 mice predominantly used V beta 6 TCR genes for H-Y specificity, conferring Mls-1a reactivity.
  • Mls-1a expression in (DBA/2 x C57BL/6)F1 mice did not abolish H-Y specific responses.
  • These F1 mice utilized alternative TCR genes instead of V beta 6 for H-Y response.

Conclusions:

  • Self tolerance can bias the repertoire of TCR genes used in response to foreign antigens.
  • This repertoire bias does not necessarily impair immune responsiveness to foreign antigens.
  • The findings suggest a mechanism for maintaining immune competence despite self-antigen exposure.