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Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells
Published on: May 6, 2013
Implication of the CD47 pathway in autoimmune diabetes
Véronique Dugas1, Claudine Beauchamp, Geneviève Chabot-Roy
1Immunology-oncology Section, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4 Canada.
Journal of Autoimmunity
|February 9, 2010
Summary
CD47 deficiency breaks immune tolerance, leading to autoimmune diabetes in mice. Restoring specific T cells prevents disease, highlighting CD47
Area of Science:
- Immunology
- Autoimmune Diseases
- Molecular Biology
Background:
- CD47 and SIRP interactions are implicated in autoimmune disease susceptibility.
- A genome-wide association study linked the SIRP gene cluster to type 1 diabetes.
- SIRP proteins are functional ligands for CD47.
Purpose of the Study:
- To investigate the role of CD47 in autoimmune diabetes using a mouse model.
- To determine if CD47 deficiency impacts immune tolerance and disease onset.
Main Methods:
- Utilized a TCR transgenic mouse model predisposed to autoimmune disease.
- Generated CD47-deficient mice to assess disease development.
- Analyzed T cell populations, specifically CD4(-)CD8(-) T cells.
- Performed passive transfer of CD4(-)CD8(-) T cells to evaluate immune tolerance restoration.
Main Results:
- CD47 deficiency was sufficient to break immune tolerance and trigger autoimmune diabetes.
- CD47-deficient mice exhibited a significant reduction in mature CD4(-)CD8(-) T cells.
- Passive transfer of CD4(-)CD8(-) T cells from CD47-deficient mice restored immune tolerance and prevented diabetes progression.
Conclusions:
- CD47 plays a critical role in maintaining immune tolerance and preventing autoimmune diabetes.
- CD47 influences the homeostatic regulation of CD4(-)CD8(-) T cells.
- These findings provide in vivo evidence for CD47's involvement in diabetes susceptibility.
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