Priming of Autoreactive CD8+ T Cells Is Inhibited by Immunogenic Peptides Which Are Competitive for Major Histocompatibility Complex Class I Binding
Immune Network
;
: 86-93, 2013.
Article
in English
| WPRIM
| ID: wpr-67402
ABSTRACT
In the present study, we investigated if priming of autoreactive CD8+ T cells would be inhibited by competitive peptides for major histocompatibility complex (MHC) class I binding. We used a mouse model of vitiligo which is induced by immunization of Kb-binding tyrosinase-related protein 2 (TRP2)-180 peptide. Competitive peptides for Kb binding inhibited IFN-gamma production and proliferation of TRP2-180-specific CD8+ T cells upon ex vivo peptide restimulation, while other MHC class I-binding peptides did not. In mice, the capability of inhibition was influenced by T-cell immunogenicity of the competitive peptides. The competitive peptide with a high T-cell immunogenicity efficiently inhibited priming of TRP2-180-specific CD8+ T cells in vivo, whereas the competitive peptide with a low T-cell immunogenicity did not. Taken together, the inhibition of priming of autoreactive CD8+ T cells depends on not only competition of peptides for MHC class I binding but also competitive peptide-specific CD8+ T cells, suggesting that clonal expansion of autoreactive T cells would be affected by expansion of competitive peptide-specific T cells. This result provides new insights into the development of competitive peptides-based therapy for the treatment of autoimmune diseases.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Peptides
/
Autoimmune Diseases
/
Vitiligo
/
T-Lymphocytes
/
Immunization
/
Major Histocompatibility Complex
Limits:
Animals
Language:
English
Journal:
Immune Network
Year:
2013
Type:
Article
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