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Cutting Edge |
Department of Pathology, University of Cambridge, Cambridge, United Kingdom
BDC2.5/nonobese diabetic (NOD) transgenic mice express a TCR
from a diabetogenic T cell clone yet do not spontaneously develop
diabetes at high incidence. Evidence exists showing that in the absence
of endogenous TCR
-chain rearrangements this transgenic mouse
spontaneously develops diabetes and that CTLA-4 negatively regulates
diabetes onset. This strongly suggests that onset of diabetes in
BDC2.5/NOD mice is governed by T cell regulation. We addressed the
mechanism of immune regulation in BDC2.5/NOD mice. We find that
activated spleen cells from young, but not old, BDC2.5/NOD mice are
able to transfer diabetes to NOD-scid recipients. We
have used anti-IL-10R to show that the failure of splenocytes from
older mice to transfer diabetes is due to dominant regulation. We
furthermore found that diabetes developed following anti-IL-10R
treatment of 6-wk old BDC2.5/NOD mice indicating that endogenous IL-10
plays a key role in the regulation of diabetes onset in this transgenic
mouse.
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