A dRASSF-STRIPAK-Imd-JAK/STAT axis controls antiviral immune response in Drosophila.

A dRASSF-STRIPAK-Imd-JAK/STAT axis controls antiviral immune response in Drosophila.
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dRASSF-STRIPAK-Imd-JAK/STAT 轴控制果蝇的抗病毒免疫反应。

DOI:
10.1016/j.celrep.2022.111143
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发表时间:
2022
期刊:
影响因子:
8.8
通讯作者:
Bo Liu
Bo Liu
中科院分区:
生物学1区
文献类型:
--
作者:
Rui Shen;Kewei Zheng;Yu Zhou;Xiaofeng Chi;Huimin Pan;Chengfang Wu;Yinan Yang;Yonggang Zheng;D. Pan;Bo Liu

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宿主的抗病毒免疫受到快速进化的病毒的强大压力。识别宿主抗病毒免疫机制对于开发抗病毒策略具有深远的意义。在这里,我们发现了一个重要的作用,肿瘤抑制Ras相关结构域家族(RASSF)在果蝇抗病毒反应。dRassfin脂肪体的缺失导致对病毒感染的易感性增加和Imd途径活化受损,伴随有害的JAK/STAT信号转导过度活化。从机制上讲,dRASSF保护TAK 1(Imd途径的关键激酶)免受STRIPAK PP 2A磷酸酶复合物的抑制。活化的Imd信号传导然后利用效应物Relish干扰JAK/STAT跨膜受体Domeless的二聚化,从而防止过度的JAK/STAT信号传导。此外,我们发现RASSF和STRIPAK PP 2A复合物也参与人细胞系的抗病毒反应。我们的研究确定了RASSF在抗病毒免疫中的重要作用,并阐明了dRASSF-STRIPAK-Imd-JAK/STAT信号轴,以确保果蝇适当的抗病毒反应。
Host antiviral immunity suffers strong pressure from rapidly evolving viruses. Identifying host antiviral immune mechanisms has profound implications for developing antiviral strategies. Here, we uncover an essential role for the tumor suppressor Ras-association domain family (RASSF) inDrosophilaantiviral response. Loss ofdRassfin fat body leads to increased vulnerability to viral infection and impaired Imd pathway activation accompanied by detrimental JAK/STAT signaling overactivation. Mechanistically, dRASSF protects TAK1, a key kinase of Imd pathway, from inhibition by the STRIPAK PP2A phosphatase complex. Activated Imd signaling then employs the effector Relish to interfere with the dimerization of JAK/STAT transmembrane receptor Domeless, therefore preventing excessive JAK/STAT signaling. Moreover, we find that RASSF and STRIPAK PP2A complex are also involved in antiviral response in human cell lines. Our study identifies an important role for RASSF in antiviral immunity and elucidates a dRASSF-STRIPAK-Imd-JAK/STAT signaling axis that ensures proper antiviral responses inDrosophila.
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