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Prevention of “Humanized” Diabetogenic CD8 T-Cell Responses in HLA-Transgenic NOD Mice by a Multipeptide Coupled-Cell Approach

OBJECTIVE: Type 1 diabetes can be inhibited in standard NOD mice by autoantigen-specific immunotherapy targeting pathogenic CD8+ T-cells. NOD.β2m(null).HHD mice expressing human HLA-A2.1 but lacking murine major histocompatibility complex class I molecules develop diabetes characterized by CD8 T-cel...

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Detalles Bibliográficos
Autores principales: Niens, Marijke, Grier, Alexandra E., Marron, Michele, Kay, Thomas W.H., Greiner, Dale L., Serreze, David V.
Formato: Texto
Lenguaje:English
Publicado: American Diabetes Association 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3064096/
https://www.ncbi.nlm.nih.gov/pubmed/21346176
http://dx.doi.org/10.2337/db10-1523
Descripción
Sumario:OBJECTIVE: Type 1 diabetes can be inhibited in standard NOD mice by autoantigen-specific immunotherapy targeting pathogenic CD8+ T-cells. NOD.β2m(null).HHD mice expressing human HLA-A2.1 but lacking murine major histocompatibility complex class I molecules develop diabetes characterized by CD8 T-cells recognizing certain autoantigenic peptides also targeted in human patients. These include peptides derived from the pancreatic β-cell proteins insulin (INS1/2 A(2–10) and INS1 B(5–14)) and islet-specific glucose-6-phosphatase catalytic subunit–related protein (IGRP(265–273) and IGRP(228–236)). Hence, NOD.β2m(null).HHD mice represent a model system for developing potentially clinically translatable interventions for suppressing diabetogenic HLA-A2.1–restricted T-cell responses. RESEARCH DESIGN AND METHODS: Starting at 4–6 weeks of age, NOD.β2m(null).HHD female mice were injected intravenously with syngeneic splenocytes to which various admixtures of the four above-mentioned peptides were bound by the cross-linking agent ethylene carbodiimide (ECDI). RESULTS: Treatment with such cells bearing the complete cocktail of INS and IGRP epitopes (designated INS/IGRP-SPs) significantly inhibited diabetes development in NOD.β2m(null).HHD recipients compared with controls receiving splenocytes coupled with an irrelevant HLA-A2.1–restricted Flu16 peptide. Subsequent analyses found syngeneic splenocytes bearing the combination of the two ECDI-coupled IGRPs but not INS peptides (IGRP-SPs or INS-SPs) effectively inhibited diabetes development in NOD.β2m(null).HHD mice. This result was supported by enzyme-linked immunospot (ELISPOT) analyses indicating combined INS/IGRP-SPs diminished HLA-A2.1–restricted IGRP but not INS autoreactive CD8+ T-cell responses in NOD.β2m(null).HHD mice. CONCLUSIONS: These data support the potential of a cell therapy approach targeting HLA-A2.1–restricted IGRP autoreactive CD8 T-cells as a diabetes intervention approach in appropriate human patients.