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Phenotypic and Functional Analysis of Activated Regulatory T Cells Isolated from Chronic Lymphocytic Choriomeningitis Virus-infected Mice
Published on: June 22, 2016
Glutamic acid decarboxylase-specific CD4+ regulatory T cells.
1Beckman Research Institute, City of Hope, Division of Immunology, 1450 E. Duarte, Duarte CA 91010, USA. cliu@coh.org
Annals of the New York Academy of Sciences
|November 30, 2006
Summary
Regulatory T (Tr) cells are crucial for immune tolerance. This study shows that T cells specific for glutamic acid decarboxylase (GAD) peptides in NOD mice are predominantly Tr cells that inhibit type 1 diabetes development.
Area of Science:
- Immunology
- Endocrinology
- Autoimmunity
Background:
- CD4(+) regulatory T (Tr) cells are vital for immune tolerance.
- Autoantigen-specific Tr cells offer greater therapeutic potential than polyclonal Tr cells.
- Understanding Tr cells in type 1 diabetes is key for developing antigen-specific therapies.
Purpose of the Study:
- Determine the antigen specificity of Tr cells in type 1 diabetes.
- Investigate the in vivo behavior and interactions of antigen-specific Tr cells.
- Elucidate the mechanisms by which Tr cells regulate type 1 diabetes.
- Focus on glutamic acid decarboxylase (GAD)-specific T cells due to their known role in type 1 diabetes.
Main Methods:
- Utilized antigen-specific I-Ag7 tetramers to isolate GAD peptide-specific T cells.
- Studied T cell populations from diabetes-prone NOD and diabetes-resistant NOR mice.
- Analyzed the function and specificity of isolated T cell populations.
Main Results:
- Identified several populations of GAD peptide-specific T cells.
- Evidence suggests a bias towards Tr cells that inhibit rather than induce diabetes.
- GAD peptide treatment in NOD mice prevents diabetes, potentially via Tr cell induction.
Conclusions:
- The repertoire of GAD peptide-specific T cells in NOD mice is skewed towards regulatory, diabetes-inhibiting cells.
- These findings support the development of GAD-based antigen-specific immunotherapy for type 1 diabetes.
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