In:
The Journal of Immunology, The American Association of Immunologists, Vol. 166, No. 12 ( 2001-06-15), p. 7588-7599
Kurzfassung:
We dissected the requirements for disease induction of myelin oligodendrocyte glycoprotein (MOG)-induced experimental autoimmune encephalomyelitis in MHC (RT1 in rat) congenic rats with overlapping MOG peptides. Immunodominance with regard to peptide-specific T cell responses was purely MHC class II dependent, varied between different MHC haplotypes, and was linked to encephalitogenicity only in RT1.Ba/Da rats. Peptides derived from the MOG sequence 91–114 were able to induce overt clinical signs of disease accompanied by demyelinated CNS lesions in the RT1.Ba/Da and RT1n haplotypes. Notably, there was no detectable T cell response against this encephalitogenic MOG sequence in the RT1n haplotype in peripheral lymphoid tissue. However, CNS-infiltrating lymphoid cells displayed high IFN-γ, TNF-α, and IL-4 mRNA expression suggesting a localization of peptide-specific reactivated T cells in this compartment. Despite the presence of MOG-specific T and B cell responses, no disease could be induced in resistant RT1l and RT1u haplotypes. Comparison of the number of different MOG peptides binding to MHC class II molecules from the different RT1 haplotypes suggested that susceptibility to MOG-experimental autoimmune encephalomyelitis correlated with promiscuous peptide binding to RT1.B and RT1.D molecules. This may suggest possibilities for a broader repertoire of peptide-specific T cells to participate in disease induction. We demonstrate a powerful MHC class II regulation of autoaggression in which MHC class II peptide binding and peripheral T cell immunodominance fail to predict autoantigenic peptides relevant for an autoaggressive response. Instead, target organ responses may be decisive and should be further explored.
Materialart:
Online-Ressource
ISSN:
0022-1767
,
1550-6606
DOI:
10.4049/jimmunol.166.12.7588
Sprache:
Englisch
Verlag:
The American Association of Immunologists
Publikationsdatum:
2001
ZDB Id:
1475085-5
