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Related Experiment Videos

Invariant V(alpha)19i T cells regulate autoimmune inflammation.

J Ludovic Croxford1, Sachiko Miyake, Yi-Ying Huang

  • 1Department of Immunology, National Institute of Neuroscience, National Centre of Neurology and Psychiatry, Tokyo 187-8502, Japan.

Nature Immunology
|August 1, 2006
PubMed
Summary
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Invariant V(alpha)19-J(alpha)33 T cell receptor alpha-chain (V(alpha)19i TCR) T cells regulate experimental autoimmune encephalomyelitis (EAE). These cells, restricted by MR1, suppress EAE by reducing inflammation and increasing interleukin 10, suggesting an immunoregulatory role.

Area of Science:

  • Immunology
  • Neuroimmunology
  • Autoimmunity

Background:

  • T cells expressing invariant V(alpha)19-J(alpha)33 T cell receptor alpha-chain (V(alpha)19i TCR) are restricted by the MR1 molecule.
  • The role of V(alpha)19i T cells in autoimmune diseases remains unclear.

Purpose of the Study:

  • To investigate the involvement of V(alpha)19i T cells in autoimmunity, specifically in experimental autoimmune encephalomyelitis (EAE).

Main Methods:

  • Utilized a transgenic mouse model expressing V(alpha)19i TCR.
  • Employed MR1-deficient mice lacking V(alpha)19i T cells.
  • Assessed EAE induction and progression.
  • Measured inflammatory mediators and cytokine production, including interleukin 10.

Main Results:

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  • V(alpha)19i T cells inhibited the induction and progression of EAE.
  • EAE was exacerbated in MR1-deficient mice, confirming the protective role of V(alpha)19i T cells.
  • EAE suppression correlated with reduced inflammatory mediators and increased interleukin 10 secretion.
  • Interleukin 10 production involved interactions between B cells and V(alpha)19i T cells via the ICOS costimulatory molecule.

Conclusions:

  • V(alpha)19i T cells play a significant immunoregulatory role in experimental autoimmune encephalomyelitis.
  • These findings suggest a potential therapeutic target for multiple sclerosis and other autoimmune conditions.