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Erschienen in: Diabetologia 6/2015

01.06.2015 | Article

PD-1-dependent restoration of self-tolerance in the NOD mouse model of diabetes after transient anti-TCRβ mAb therapy

verfasst von: Paul M. Schroder, Mithun Khattar, Caitlin E. Baum, Yoshihiro Miyahara, Wenhao Chen, Rohit Vyas, Shravan Muralidharan, Beata Mierzejewska, Stanislaw M. Stepkowski

Erschienen in: Diabetologia | Ausgabe 6/2015

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Abstract

Aims/hypothesis

T cells play a major role in the pathogenesis of type 1 diabetes, and there is great interest in developing curative immunotherapies targeting these cells. In this study, a monoclonal antibody (mAb) targeting the T cell receptor β-chain (TCRβ) was investigated for its ability to prevent and reverse disease in mouse models of diabetes.

Methods

RIP-OVAhi (C57BL/6-Tg(Ins2-OVA)59Wehi/WehiJ) mice adoptively transferred with ovalbumin-specific T cells (an induced model of diabetes) and NOD mice (a spontaneous model of diabetes) were used to test anti-TCRβ mAb therapy as a means of preventing and reversing type 1 diabetes.

Results

A single dose of anti-TCRβ completely prevented disease in RIP-OVAhi mice without inducing the release of inflammatory cytokines. Transient anti-TCRβ therapy prevented diabetes in 90% of NOD mice and reversed the disease after its onset in 73% of NOD mice. Long after the remission of type 1 diabetes, the anti-TCRβ treated mice were able to reject BALB/c skin allografts with normal kinetics while maintaining normoglycaemia. Treatment did not cause significant reductions in lymphocyte numbers in the spleen or pancreatic lymph nodes, but did result in a decreased percentage of chemokine receptor 9 (CCR9) positive, CD8+ T cells. Notably, anti-TCRβ therapy increased the expression of programmed death 1 (PD-1) on the surface of the T cells; PD-1 expression is important for maintaining anti-TCRβ-induced self-tolerance, as type 1 diabetes recurs in mice following a blockade of PD-1 signalling.

Conclusions/interpretation

Anti-TCRβ mAb is a safe and effective immunotherapy that results in reduced numbers of CCR9+ T cells, an increased expression of PD-1 on T cells and the restoration of self-tolerance in NOD mice.
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Metadaten
Titel
PD-1-dependent restoration of self-tolerance in the NOD mouse model of diabetes after transient anti-TCRβ mAb therapy
verfasst von
Paul M. Schroder
Mithun Khattar
Caitlin E. Baum
Yoshihiro Miyahara
Wenhao Chen
Rohit Vyas
Shravan Muralidharan
Beata Mierzejewska
Stanislaw M. Stepkowski
Publikationsdatum
01.06.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Diabetologia / Ausgabe 6/2015
Print ISSN: 0012-186X
Elektronische ISSN: 1432-0428
DOI
https://doi.org/10.1007/s00125-015-3564-1

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