1. Academic Validation
  2. PI3K/AKT/p53 pathway inhibits infectious spleen and kidney necrosis virus infection by regulating autophagy and immune responses

PI3K/AKT/p53 pathway inhibits infectious spleen and kidney necrosis virus infection by regulating autophagy and immune responses

  • Fish Shellfish Immunol. 2022 Jan;120:648-657. doi: 10.1016/j.fsi.2021.12.046.
Xiaoting Zhang 1 Yue Ming 1 Xiaozhe Fu 1 Yinjie Niu 1 Qiang Lin 1 Hongru Liang 1 Xia Luo 1 Lihui Liu 1 Ningqiu Li 2
Affiliations

Affiliations

  • 1 Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Guangdong Province Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, China.
  • 2 Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Guangdong Province Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, China. Electronic address: liningq@126.com.
Abstract

The PI3K/Akt/p53 signaling pathway is activated by various types of cellular stimuli or pathogenic Infection, and then regulates fundamental cellular functions to combat these stimulations. Here, we studied the meaningful roles of PI3K/Akt/p53 in regulating cellular machine such as Autophagy, immune responses, as well as Antiviral activity in Chinese perch brain (CPB) cells infected by infectious spleen and kidney necrosis virus (ISKNV), which is an agent caused devastating losses in mandarin fish (Siniperca chuatsi) industry. We found that ISKNV Infection induced up-regulation of host PI3K/Akt/p53 axis, but inhibited Autophagy in CPB cells. Interestingly, activation of PI3K/Akt/p53 axis factors trough agonists or overexpression dramatically decreased host Autophagy level, inhibited ISKNV replication, and elevated the expression of immune-related genes in CPB cells. In contrast, suppression of PI3K/Akt/p53 pathway by inhibitors or small interfering RNA (siRNA)-mediated gene silence increased the Autophagy and ISKNV replication, but down-regulated immune responses in CPB cells. All these results indicate that PI3K/Akt/p53 pathway plays an important role in anti-ISKNV Infection and can be used as a new target for controlling ISKNV disease.

Keywords

Antiviral target; Autophagy; ISKNV; PI3K/AKT/p53; Siniperca chuatsi.

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