Newcastle disease virus activates the PI3K/AKT signaling pathway by targeting PHLPP2 degradation to delay cell apoptosis and promote viral replication

文献类型： 外文期刊

第一作者： Fan, Lei

作者： Fan, Lei;Liang, Zhaoping;Rena, Jinlian;Chen, Yichun;Zhu, He;Chen, Yanan;Lin, Qiuyan;Chen, Libin;Ren, Tao;Fan, Lei;Liang, Zhaoping;Rena, Jinlian;Chen, Yichun;Zhu, He;Chen, Yanan;Lin, Qiuyan;Chen, Libin;Ren, Tao;Fan, Lei;Liang, Zhaoping;Rena, Jinlian;Chen, Yichun;Zhu, He;Chen, Yanan;Lin, Qiuyan;Chen, Libin;Ren, Tao;Fan, Lei;Liang, Zhaoping;Rena, Jinlian;Chen, Yichun;Zhu, He;Chen, Yanan;Lin, Qiuyan;Chen, Libin;Ren, Tao;Xiang, Bin;Ding, Chan

作者机构：

关键词： Newcastle disease virus; PI3K/AKT signaling pathway; Apoptosis; PHLPP2

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN： 0378-1135

年卷期： 2024 年 289 卷

页码：

收录情况： SCI

摘要： Newcastle disease (ND) is a highly pathogenic, contagious, and fatal infectious disease in poultry caused by the Newcastle disease virus (NDV). The PI3K/AKT signaling pathway is a phosphorylation cascade that participates in regulating several cellular functions. Viruses reportedly regulate the course of infection through the PI3K/AKT axis. Here, we aimed to analyze the pathogenesis of NDV infection mediated by the PI3K/AKT signaling pathway activation. We found that NDV infection can phosphorylate AKT to activate the PI3K/AKT axis both in vitro and in vivo. Flow cytometry and Caspase-3 activity assay showed that NDV infection could inhibit cell apoptosis. The activation or inhibition of the PI3K/AKT signaling pathway activity significantly inhibited or promoted NDVmediated apoptosis. Furthermore, inhibition of cell apoptosis significantly promoted NDV replication. Overall, our results showed that NDV infection activates the PI3K/AKT signaling pathway and inhibits cell apoptosis, thus promoting viral replication. In this context, the reduced expression of PHLPP2 protein mediated by NDV infection could be inhibited by MG132. PHLPP2 expression reversely and positively regulated NDV replication and cell apoptosis, respectively. These results indicated that NDV infection-mediated activation of the PI3K/AKT signaling pathway and the inhibition of apoptosis depend on the ubiquitin-proteasome degradation of the PHLPP2 protein. Co-IP and indirect immunofluorescence results showed that NDV V protein could interact with PHLPP2 protein, indicating that NDV targeted PHLPP2 protein degradation through V protein to activate the PI3K/AKT signaling pathway. This study deepens our understanding of the molecular mechanisms of NDV infection, providing a theoretical basis for ND prevention and control.

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