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T-cell tolerance

B J Fowlkes1, F Ramsdell

  • 1Laboratory of Cellular and Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892.

Current Opinion in Immunology
|December 1, 1993
PubMed
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T-cell tolerance, crucial for preventing autoimmunity, involves both deletion and non-deletion mechanisms in the thymus and periphery. Ongoing research clarifies the cellular and molecular interactions balancing immune responses and self-tolerance.

Area of Science:

  • Immunology
  • Cellular Biology
  • Autoimmunity

Background:

  • Autoimmunity causes significant individual harm.
  • T-cell tolerance, encompassing deletional and non-deletional forms, operates in both the thymus and periphery.
  • The precise relationship between these tolerance mechanisms remains incompletely understood.

Purpose of the Study:

  • To elucidate the cellular and molecular interactions governing T-cell tolerance.
  • To investigate the balance between effector function and activation-induced tolerance in peripheral T-cell responses.

Main Methods:

  • In vivo studies
  • In vitro assays
  • Analysis of thymic development (positive and negative selection)
  • Examination of peripheral T-cell activation and tolerance induction

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Main Results:

  • Recent studies have begun identifying key cellular and molecular players in T-cell tolerance.
  • Thymic development requires managing both positive and negative selection processes.
  • Peripheral T-cell responses necessitate a balance between effector cell generation and induced tolerance.

Conclusions:

  • Understanding T-cell tolerance is vital for managing autoimmune diseases.
  • Both central (thymic) and peripheral tolerance mechanisms are essential for immune homeostasis.
  • Future research will further define the complex interplay of factors regulating T-cell responses and preventing self-reactivity.