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Siniperca chuatsi rhabdovirus (SCRV) induces autophagy via PI3K/Akt-mTOR pathway in CPB cells

文献类型： 外文期刊

作者： Fu, Xiaozhe 1 ; Ming, Yue 1 ; Li, Chen 1 ; Niu, Yinjie 1 ; Lin, Qiang 1 ; Liu, Lihui 1 ; Liang, Hongru 1 ; Huang, Zhibin; 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Fishery Drug Dev, Minist Agr & Rural Affairs,Key Lab Aquat Anim Imm, Guangzhou 510380, Guangdong, Peoples R China

2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China

关键词： Siniperca chuatsi; SCRV; Autophagy; PI3K/Akt-mTOR

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）

ISSN： 1050-4648

年卷期： 2020 年 102 卷

页码：

收录情况： SCI

摘要： Autophagy is an important mechanism for organisms to eliminate viruses and other intracellular pathogens. Siniperca chuatsi rhabdovirus (SCRV) is an agent that has caused devastating losses in Chinese perch (Siniperca chuatsi) industry. But the role of autophagy in Siniperca chuatsi rhabdovirus (SCRV) infection is not clearly understood. In this study, we identified that SCRV infection triggered autophagy in CPB cells, which was demonstrated by the appearance of the membrane vesicles, GFP-LC3 punctuate pattern, conversion of LC3-I to LC3-II, and the co-localization of autophagosomes and lysosomes. The changes of autophagy flux in SCRV infection indicated that autophagy was inhibited at the early stage of SCRV infection, but was promoted at the late stage. UV-inactivated SCRV can induce autophagy, suggesting that SCRV replication is not essential for the induction of autophagy. Furthermore, we found inducing autophagy with Rapa inhibited SCRV proliferation, but inhibiting autophagy with 3-MA or CQ increased SCRV production in CPB cells. Then we assessed the effects of PI3K/AktmTOR signaling pathway on SCRV induced autophagy. We found that SCRV infection activated PI3K/AKT signaling pathway at 4 hpi, but inhibited it at 8 hpi. SCRV-N mRNA and protein level were decreased by inhibiting PI3K with LY294002, but increased by activating PI3K with 740Y-P. Those results indicated that SCRV infection induced autophagy via the PI3K/Akt-mTOR signal pathway, which will provide new insights into SCRV pathogenesis and antiviral treatment strategies.

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