Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (10): 4571-4578.doi: 10.11843/j.issn.0366-6964.2024.10.028

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Expression and Identification of Porcine Encephalomyocarditis Virus-like Particles Based on Baculovirus-insect Cell Expression System

Yunhang WANG1,2(), Wei JING1(), Suyu MU1, Shiqi SUN1, Huichen GUO1, Manyuan BAI1,*()   

  1. 1. State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
    2. School of Life Science, Yulin University, Yulin 719000, China
  • Received:2023-11-20 Online:2024-10-23 Published:2024-11-04
  • Contact: Manyuan BAI E-mail:1127707200@qq.com;2635378262@qq.com;baimanyuan@cass.cn

Abstract:

Porcine encephalomyocarditis is a viral zoonotic disease caused by encephalomyocarditis virus and characterized by porcine encephalitis and myocarditis, which can infect a variety of mammals. Currently, there is no effective vaccine in China, so developing a safe and effective vaccine is an effective measure to prevent and control this disease. In this study, virus-like particals of porcine encephalomyocarditis virus were assembled by using the baculovirus-insect cell expression system with P1 and 3CD co-expression strategy, and the immune response effect of the virus in mice was preliminatively evaluated. The results showed that the specific antibody titer of mice in the immune group reached more than 1∶192, the neutralizing antibody titer reached more than 1∶64, and the combination with ISA206 adjuvant can induce higher antibody levels. The levels of IL-4, IFN-γ, IL-5 and TNF-α cytokines all reached 20 pg·mL-1, and were significantly higher than those in PBS group. Therefore, the EMCV virus-like particle vaccine obtained in this study can induce the body to produce good cellular and humoral immune responses, and can also induce the production of inflammatory cytokines, which helps to stimulate the body's immune response, enhance the protective effect of the vaccine, and provide theoretical basis and technical reserve for the prevention and control of EMCV.

Key words: baculovirus-insect cell expression system, encephalomyocarditis virus, virus-like particles

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