Altered thymic differentiation and modulation of arthritis by invariant NKT cells expressing mutant ZAP70.

Altered thymic differentiation and modulation of arthritis by invariant NKT cells expressing mutant ZAP70.
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DOI:
10.1038/s41467-018-05095-7
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发表时间:
2018-07-06
影响因子:
16.6
通讯作者:
Kronenberg M
Kronenberg M
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhao M;Svensson MND;Venken K;Chawla A;Liang S;Engel I;Mydel P;Day J;Elewaut D;Bottini N;Kronenberg M

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Various subsets of invariant natural killer T (iNKT) cells with different cytokine productions develop in the mouse thymus, but the factors driving their differentiation remain unclear. Here we show that hypomorphic alleles of Zap70 or chemical inhibition of Zap70 catalysis leads to an increase of IFN-γ-producing iNKT cells (NKT1 cells), suggesting that NKT1 cells may require a lower TCR signal threshold. Zap70 mutant mice develop IL-17-dependent arthritis. In a mouse experimental arthritis model, NKT17 cells are increased as the disease progresses, while NKT1 numbers negatively correlates with disease severity, with this protective effect of NKT1 linked to their IFN-γ expression. NKT1 cells are also present in the synovial fluid of arthritis patients. Our data therefore suggest that TCR signal strength during thymic differentiation may influence not only IFN-γ production, but also the protective function of iNKT cells in arthritis. Invariant natural killer T (iNKT) cells can be subsetted based on their cytokine productions. Here the authors show, using Zap70 mutant mice, that interferon-γ secreting (IFN-γ) iNKT cells may be induced by hampered T cell receptor signallings to help ameliorate interleukin-17-mediated joint inflammation.
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