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Related Experiment Videos

Multiple levels of peripheral tolerance

B Arnold1, G Schönrich, G J Hämmerling

  • 1Division of Somatic Genetics, Tumor Immunology Program, German Cancer Research Center, Heidelberg.

Immunology Today
|January 1, 1993
PubMed
Summary
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Self tolerance in T cells involves multiple steps. Peripheral T cells can achieve varying tolerance levels and deepen their tolerance with further signals, indicating a multistep mechanism.

Area of Science:

  • Immunology
  • T cell biology
  • Self tolerance mechanisms

Background:

  • Self tolerance is crucial for preventing autoimmune diseases.
  • T cell tolerance is established through deletion or nonresponsiveness in the thymus and periphery.
  • Existing models may not fully capture the dynamic nature of peripheral T cell tolerance.

Purpose of the Study:

  • To investigate the varying levels of tolerance achievable by peripheral T cells.
  • To explore the susceptibility of tolerant T cells to further tolerogenic signals.
  • To propose a refined model for T cell tolerance induction.

Main Methods:

  • Analysis of T cell populations in thymus and periphery.
  • Assessment of T cell reactivation capacity following tolerogenic signals.

Related Experiment Videos

  • Experimental manipulation of tolerogenic signals to induce deeper tolerance states.

    • Main Results:

    • Peripheral T cells can attain distinct levels of tolerance based on tolerogenic signals.
    • Tolerant T cells remain responsive to additional tolerogenic signals.
    • These findings suggest a progressive deepening of T cell tolerance.

    Conclusions:

    • T cell tolerance induction is a dynamic and multistep process.
    • Peripheral T cells can exist in graded states of tolerance.
    • Further tolerogenic signals can enhance the nonresponsive state of T cells, contributing to robust self-tolerance.