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Conserved T cell receptor V gene usage by uveitogenic T cells
D S Gregerson1, S P Fling, C F Merryman
1Department of Ophthalmology, University of Minnesota, Minneapolis 55455.
Clinical Immunology and Immunopathology
|January 1, 1991
Summary
Pathogenic T cells in experimental autoimmune uveoretinitis (EAU) use specific T cell receptor V genes (V alpha 510 and V beta 510). This finding links these genes to disease severity in the S-antigen rat model.
Area of Science:
- Immunology
- Ophthalmology
- Autoimmune Diseases
Background:
- Retinal S-antigen is a key factor in studying experimental autoimmune uveoretinitis (EAU) in LEW rats.
- Understanding T cell receptor (TCR) V gene usage is crucial for elucidating autoimmune disease mechanisms.
Purpose of the Study:
- To investigate the T cell receptor V gene usage in T cell lines recognizing pathogenic and nonpathogenic sites of S-antigen.
- To determine if rat V alpha 510 and V beta 510 homologues are utilized by uveitogenic T cells in EAU.
Main Methods:
- Analysis of T cell lines derived from the LEW rat model of EAU.
- Utilized cDNA probes for a LEW rat TCR specific to myelin basic protein's encephalitogenic determinant.
- Examined V alpha 510 and V beta 510 gene expression in pathogenic versus nonpathogenic T cell lines.
Main Results:
- Pathogenicity in the S-antigen/EAU model directly correlates with the usage of specific rat V genes.
- All pathogenic T cell lines expressed TCRs from the V beta 510 and V alpha 510 families.
- Nonpathogenic T cell lines did not show detectable usage of the V beta 510 gene.
Conclusions:
- The V alpha 510 and V beta 510 gene families are associated with pathogenicity in S-antigen-induced EAU.
- This finding extends the known association of these V gene regions with pathogenicity in experimental autoimmune encephalomyelitis models.
- TCR V gene usage provides insights into the mechanisms driving autoimmune responses in the eye.