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
Wang, Bin
中科院分区:
医学3区
文献类型:
--
作者:
Zou, Qiang;Wu, Bing;Xue, Jia;Fan, Xiaoxu;Feng, Congcong;Geng, Shuang;Wang, Ming;Wang, Bin

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尽管已经描述了感染或自身免疫过程中Treg细胞介导的抑制,但高致病性禽流感病毒感染过程中Treg细胞的功能仍然缺乏表征。我们发现在Foxp 3-GFP转基因小鼠中,在H5 N1感染期间,CD 8 + Foxp 3 + Treg细胞而不是CD 4 + Foxp 3 + Treg细胞被显著诱导。除了表达⑶ 25之外,⑶ 8 + Foxp 3 + Treg细胞显示高水平的GITR并产生IL-10。在过继转移模型中,CD 8 + Treg细胞抑制CD 8 + T细胞应答并促进H5 N1病毒感染,导致死亡率增加和肺中病毒载量增加。此外,IL-10的体外中和以及IL-10 R缺陷小鼠的体外和体内研究证明了IL-10产生在CD 8 + Treg细胞抑制CD 8 + T细胞应答的能力中的重要作用。我们的研究结果确定了CD 8 + Treg细胞在CD 8 + T细胞应答的负调节中的先前未被认识的作用,并表明CD 8 + Treg细胞的调节可能是控制H5 N1病毒感染的治疗策略。
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.
在B淋巴细胞缺陷小鼠中对致命流感病毒感染的抗性和恢复。
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