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Wang J, Yan H, Bei L, Jiang S, Zhang R. 2A2 protein of DHAV-1 induces duck embryo fibroblasts gasdermin E-mediated pyroptosis. Vet Microbiol 2024; 290:109987. [PMID: 38246107 DOI: 10.1016/j.vetmic.2024.109987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/31/2023] [Accepted: 01/06/2024] [Indexed: 01/23/2024]
Abstract
The duck hepatitis A virus type 1 (DHAV-1) causes rapid death in ducklings by triggering a severe cytokine storm. Pyroptosis is an inflammatory form of programmed cell death that is directly related to an increase in pro-inflammatory cytokine levels. Only a few studies have explored the mechanisms underlying pyroptosis in virus-infected avian cells. In this study, we established an avian infection model in vitro by infecting duck embryo fibroblasts (DEFs) with the virulent DHAV-1 LY0801 strain. DHAV-1 infection induced pyroptosis in the DEFs by activating gasdermin E (GSDME) protein via caspase-3-mediated cleavage. The genes encoding the different structural and non-structural DHAV-1 proteins were cloned into eukaryotic expression plasmids, and the 2A2 protein was identified as the key protein involved in pyroptosis. The HPLC-tandem mass spectrometry (HPLC-MS/MS) and co-immunoprecipitation (Co-IP) analysis established that DHAV-1 2A2 directly interacted with the mitochondrial anti-viral signaling protein (MAVS) both intracellularly and in vitro. Furthermore, we got the results that N-terminal 1-130 aa of 2A2 was involved in the interaction with MAVS and the C-terminal TM domain of MAVS is necessary for the interaction with 2A2 by Co-IP analysis. To our knowledge, this is the first study to reveal that DHAV-1 protein interacts with host proteins to induce pyroptosis. Our findings provide new insights into the molecular pathogenesis of DHAV-1 infection, and a scientific basis for the prevention and treatment of duck viral hepatitis.
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Affiliation(s)
- Jingyu Wang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Tai'an 271018, China
| | - Hui Yan
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Tai'an 271018, China
| | - Lei Bei
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Tai'an 271018, China
| | - Shijin Jiang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Tai'an 271018, China.
| | - Ruihua Zhang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Tai'an 271018, China.
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