CD8+ Treg cells suppress CD8+ T cell-responses by IL-10-dependent mechanism during H5N1 influenza virus infection.
CD8+ Treg cells suppress CD8+ T cell-responses by IL-10-dependent mechanism during H5N1 influenza virus infection.
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H5N1 流感病毒感染期间 CD8 Treg 细胞通过 IL-10 依赖性机制抑制 CD8 T 细胞反应
DOI:
10.1002/eji.201343583
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发表时间:
2014-01
影响因子:
5.4
通讯作者:
Wang, Bin
中科院分区:
文献类型:
--
作者:
Zou, Qiang;Wu, Bing;Xue, Jia;Fan, Xiaoxu;Feng, Congcong;Geng, Shuang;Wang, Ming;Wang, Bin
Although Treg-cell-mediated suppression during infection or autoimmunity has been described, functions of Treg cells during highly pathogenic avian influenza virus infection remain poorly characterized. Here we found that in Foxp3-GFP transgenic mice, CD8+ Foxp3+ Treg cells, but not CD4+ Foxp3+ Treg cells, were remarkably induced during H5N1 infection. In addition to expressing CD25, the CD8+ Foxp3+ Treg cells showed a high level of GITR and produced IL-10. In an adoptive transfer model, CD8+ Treg cells suppressed CD8+ T-cell responses and promoted H5N1 virus infection, resulting in enhanced mortality and increased virus load in the lung. Furthermore, in vitro neutralization of IL-10 and studies with IL-10R-deficient mice in vitro and in vivo demonstrated an important role for IL-10 production in the capacity of CD8+ Treg cells to inhibit CD8+ T-cell responses. Our findings identify a previously unrecognized role of CD8+ Treg cells in the negative regulation of CD8+ T-cell responses and suggest that modulation of CD8+ Treg cells may be a therapeutic strategy to control H5N1 viral infection.
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