Department of Biochemistry and Biomedical Sciences, Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada.
J Virol. 2011 Oct;85(20):10926-31. doi: 10.1128/JVI.00862-11. Epub 2011 Aug 3.
We previously found that enveloped virus binding and penetration are necessary to initiate an interferon-independent, IRF3-mediated antiviral response. To investigate whether membrane perturbations that accompany membrane fusion-dependent enveloped-virus entry are necessary and sufficient for antiviral-state induction, we utilized a reovirus fusion-associated small transmembrane (FAST) protein. Membrane disturbances during FAST protein-mediated fusion, in the absence of additional innate immune response triggers, are sufficient to elicit interferon-stimulated gene induction and establishment of an antiviral state. Using sensors of membrane disruption to activate an IRF3-dependent, interferon-independent antiviral state may provide cells with a rapid, broad-spectrum innate immune response to enveloped-virus infections.
我们之前发现,包膜病毒的结合和穿透对于启动干扰素非依赖性、IRF3 介导的抗病毒反应是必要的。为了研究伴随膜融合依赖性包膜病毒进入的膜扰动是否对于诱导抗病毒状态是必要和充分的,我们利用了呼肠孤病毒融合相关的小跨膜(FAST)蛋白。在没有其他先天免疫反应触发的情况下,FAST 蛋白介导的融合过程中的膜干扰足以引发干扰素刺激基因的诱导和抗病毒状态的建立。利用膜破坏的传感器激活 IRF3 依赖性、干扰素非依赖性抗病毒状态可能为细胞提供对包膜病毒感染的快速、广谱的先天免疫反应。