Insulin-induced remission in new-onset NOD mice is maintained by the PD-1-PD-L1 pathway.

Insulin-induced remission in new-onset NOD mice is maintained by the PD-1-PD-L1 pathway.
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DOI:
10.1084/jem.20061577
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发表时间:
2006-11-27
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Bluestone JA
Bluestone JA
中科院分区:
其他
文献类型:
--
作者:
Fife BT;Guleria I;Gubbels Bupp M;Eagar TN;Tang Q;Bour-Jordan H;Yagita H;Azuma M;Sayegh MH;Bluestone JA

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The past decade has seen a significant increase in the number of potentially tolerogenic therapies for treatment of new-onset diabetes. However, most treatments are antigen nonspecific, and the mechanism for the maintenance of long-term tolerance remains unclear. In this study, we developed an antigen-specific therapy, insulin-coupled antigen-presenting cells, to treat diabetes in nonobese diabetic mice after disease onset. Using this approach, we demonstrate disease remission, inhibition of pathogenic T cell proliferation, decreased cytokine production, and induction of anergy. Moreover, we show that robust long-term tolerance depends on the programmed death 1 (PD-1)–programmed death ligand (PD-L)1 pathway, not the distinct cytotoxic T lymphocyte–associated antigen 4 pathway. Anti–PD-1 and anti–PD-L1, but not anti–PD-L2, reversed tolerance weeks after tolerogenic therapy by promoting antigen-specific T cell proliferation and inflammatory cytokine production directly in infiltrated tissues. PD-1–PD-L1 blockade did not limit T regulatory cell activity, suggesting direct effects on pathogenic T cells. Finally, we describe a critical role for PD-1–PD-L1 in another powerful immunotherapy model using anti-CD3, suggesting that PD-1–PD-L1 interactions form part of a common pathway to selectively maintain tolerance within the target tissues.
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