High-resolution kinetic characterization of the RIG-I-signaling pathway and the antiviral response.

High-resolution kinetic characterization of the RIG-I-signaling pathway and the antiviral response.
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RIG-I信号通路和抗病毒反应的高分辨率动力学表征。

DOI:
10.26508/lsa.202302059
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发表时间:
2023-10
影响因子:
4.4
通讯作者:
Binder, Marco
Binder, Marco
中科院分区:
生物学2区
文献类型:
--
作者:
Burkart, Sandy S.;Schweinoch, Darius;Frankish, Jamie;Sparn, Carola;Wuest, Sandra;Urban, Christian;Merlo, Marta;Magalhaes, Vladimir G.;Piras, Antonio;Pichlmair, Andreas;Willemsen, Joschka;Kaderali, Lars;Binder, Marco

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这项研究采用综合方法来了解细胞对病毒感染的内在反应的动态以及病毒如何主动调节这种反应。 RIG-I 识别病毒 dsRNA 并激活细胞自主抗病毒反应。受到刺激后,它会触发信号级联反应,从而产生 I 型和 III 型干扰素。 IFN 被分泌并发出信号以引发 IFN 刺激基因的表达,从而建立细胞的抗病毒状态。该通路的拓扑结构已被深入研究,然而,其确切的动力学却知之甚少。在这里,我们采用电穿孔同步激活 RIG-I,使我们能够以高时间分辨率表征细胞固有的先天免疫信号。利用 IFNAR1/IFNLR 缺陷细胞,我们可以区分 IFN 受体下游的初级 RIG-I 信号传导和次级信号传导。基于这些数据,我们开发了一个全面的数学模型,能够模拟 RIG-I 识别 dsRNA 的下游信号以及 IFN 的反馈和信号放大。我们进一步研究了病毒拮抗剂对信号动力学的影响。我们的工作提供了对病毒感染早期发生的信号事件的全面了解,并为研究和理清宿主-病毒界面的复杂性开辟了新途径。
This study takes a comprehensive approach to understand the dynamics of the cell-intrinsic response towards virus infection and how viruses actively modulate this. RIG-I recognizes viral dsRNA and activates a cell-autonomous antiviral response. Upon stimulation, it triggers a signaling cascade leading to the production of type I and III IFNs. IFNs are secreted and signal to elicit the expression of IFN-stimulated genes, establishing an antiviral state of the cell. The topology of this pathway has been studied intensively, however, its exact dynamics are less understood. Here, we employed electroporation to synchronously activate RIG-I, enabling us to characterize cell-intrinsic innate immune signaling at a high temporal resolution. Employing IFNAR1/IFNLR-deficient cells, we could differentiate primary RIG-I signaling from secondary signaling downstream of the IFN receptors. Based on these data, we developed a comprehensive mathematical model capable of simulating signaling downstream of dsRNA recognition by RIG-I and the feedback and signal amplification by IFN. We further investigated the impact of viral antagonists on signaling dynamics. Our work provides a comprehensive insight into the signaling events that occur early upon virus infection and opens new avenues to study and disentangle the complexity of the host–virus interface.
DOI: 10.1038/ng1097
发表时间: 2003-03-01
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影响因子: 30.8
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发表时间: 2018-01
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影响因子: 11.1
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