Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (10): 4350-4361.doi: 10.11843/j.issn.0366-6964.2023.10.031

• BASIC VETERINARY MEDICINE • Previous Articles     Next Articles

Evaluation of the Antiviral Effect of Porcine GRK2 against Foot-and-mouth Disease Virus

CHEN Wenzhe1, ZHANG Xiangle2, GU Fengxing2, ZHAO Zhenxiang2, LI Kangli2, XUE Zhaoning2, ZHENG Haixue2, ZHANG Xiaoli1*, ZHU Zixiang2*   

  1. 1. College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, China;
    2. State key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
  • Received:2023-01-10 Online:2023-10-23 Published:2023-10-26

Abstract: To investigate the effect of G protein-coupled receptor kinase 2 (GRK2) on the replication of foot-and-mouth disease virus (FMDV), the porcine cellular RNA from PK-15 cells were extracted and the complete CDS region of GRK2 was obtained by Polymerase Chain Reaction (PCR) methods. Subsequently, the eukaryotic expressing plasmid was constructed. The Western blot and indirect immunofluorescence experiments showed that GRK2 was expressed in the transfected cells and located in the cytoplasm. The infection assay suggested that the transcription level and protein level of GRK2 firstly increased and then decreased in FMDV-infected PK-15 cells. Overexpression assay indicated that GRK2 significantly inhibited FMDV replication, and siRNA assay showed that downregulation of GRK2 promoted FMDV replication, revealing the antiviral function of GRK2 against FMDV. Further studies showed that FMDV 3Cpro protein interacted with GRK2 and degraded GRK2 to promote FMDV replication. In conclusion, this study laid a foundation for analysis of the antiviral mechanism of host protein GRK2 against FMDV.

Key words: foot-and-mouth disease virus, G protein-coupled receptor kinase 2, antiviral effect

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