GUT:HBV感染的新进展

2017-09-16 MedSci MedSci原创

HBV的感染是一项全世界的健康问题,但HBV导致的慢性持续感染的免疫机制仍然知之甚少。目前的研究已经认识到,在单核细胞和自然杀伤(NK)细胞中具有一些抑制特征的细胞亚群。近期,一项发表在杂志Gut上的研究评估了HBV对单核细胞和NK细胞的影响。此项研究使用流式细胞术纯化了来自慢性HBV感染患者和健康对照者的单核细胞和NK细胞,通过定量实时(qRT)-PCR,ELISA和蛋白质印迹法鉴定表型、基因表

HBV的感染是一项全世界的健康问题,但HBV导致的慢性持续感染免疫机制仍然知之甚少。目前的研究已经认识到,在单核细胞和自然杀伤(NK)细胞中具有一些抑制特征的细胞亚群。近期,一项发表在杂志Gut上的研究评估了HBV对单核细胞和NK细胞的影响。

此项研究使用流式细胞术纯化了来自慢性HBV感染患者和健康对照者的单核细胞和NK细胞,通过定量实时(qRT)-PCR,ELISA和蛋白质印迹法鉴定表型、基因表达和细胞因子的分泌。将单核细胞和NK细胞分别培养以及共培养,并通过细胞内细胞因子染色来确定NK细胞的活化。

此项研究结果显示:与健康人相比,在慢性HBV感染患者中,单核细胞表达较高水平的PD-L1,HLA-E,白介素(IL)-10和TGF-β,NK细胞表达较高水平的PD-1,CD94和IL-10 。 HBV使用乙型肝炎表明抗原(HBsAg)通MyD88 /NFκB信号通路诱导HLA-E,PD-L1,IL-10和TGF-β的表达抑制单核细胞。 HBV处理的单核细胞通过PD-L1和HLA-E信号诱导NK细胞产生IL-10。这种NK细胞可以抑制自体T细胞活化。

此项研究结果展示了免疫抑制级联,其中HBV产生抑制性单核细胞,其可以启动调节性NK细胞分化,导致T细胞抑制。

原始出处:
Li H, Zhai N, et al. Regulatory NK cells mediated between immunosuppressive monocytes and dysfunctional T cells in chronic HBV infection. Gut. 2017 Sep 12. pii: gutjnl-2017-314098. doi: 10.1136/gutjnl-2017-314098.

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    2018-04-27 klivis
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    2017-09-22 天涯183

    非常好的文章.学习了

    0

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    2017-09-16 清风拂面

    谢谢分享学习受益匪浅

    0

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    2017-09-16 月吟凤歌

    一起来讨论吧

    0

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    2017-09-16 为你把脉

    陈vv股海护航哈哈哈

    0

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    2017-09-16 明心见性

    学习了.谢谢分享

    0

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