IFI16 DNA sensor is required for death of lymphoid CD4 T cells abortively infected with HIV.

IFI16 DNA sensor is required for death of lymphoid CD4 T cells abortively infected with HIV.
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DOI:
10.1126/science.1243640
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发表时间:
2014-01-24
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Greene WC
Greene WC
中科院分区:
其他
文献类型:
--
作者:
Monroe KM;Yang Z;Johnson JR;Geng X;Doitsh G;Krogan NJ;Greene WC

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不允许HIV感染的静止的“旁观者”CD 4 T细胞的进行性耗竭是获得性免疫缺陷综合征(AIDS)的主要驱动因素。这些细胞经历以不完全HIV逆转录物的胞质积累为特征的流产感染。这些病毒DNA被一种未知的宿主传感器感知,触发先天免疫反应,导致caspase-1激活和细胞凋亡。使用无偏的蛋白质组学和靶向生物化学方法以及两种独立的慢病毒shRNA介导的原代CD 4 T细胞基因敲低方法,我们鉴定了干扰素γ诱导蛋白16(IFI 16)作为由于HIV感染失败导致的CD 4 T细胞死亡所需的宿主DNA传感器。这些发现提供了对关键宿主途径的深入了解,该途径在疾病进展为艾滋病期间的CD 4 T细胞耗竭中起着核心作用。
The progressive depletion of quiescent “bystander” CD4 T-cells, which are non-permissive to HIV infection, is a principal driver of the acquired immunodeficiency syndrome (AIDS). These cells undergo abortive infection characterized by the cytosolic accumulation of incomplete HIV reverse transcripts. These viral DNAs are sensed by an unidentified host sensor that triggers an innate immune response, leading to caspase-1 activation and pyroptosis. Using unbiased proteomic and targeted biochemical approaches as well as two independent methods of lentiviral shRNA-mediated gene knockdown in primary CD4 T-cells, we identify Interferon gamma Inducible protein 16 (IFI16) as a host DNA sensor required for CD4 T-cell death due to abortive HIV infection. These findings provide insights into a key host pathway that plays a central role in CD4 T-cell depletion during disease progression to AIDS.
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