首页|基于杆状病毒-昆虫细胞表达系统的猪脑心肌炎病毒样颗粒的表达及鉴定

基于杆状病毒-昆虫细胞表达系统的猪脑心肌炎病毒样颗粒的表达及鉴定

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脑心肌炎(encephalomyocarditis)是由脑心肌炎病毒(encephalomyocarditis virus,EMCV)引起的以猪的脑炎、心肌炎为主要特征的病毒性人畜共患病,可感染多种哺乳动物,目前国内尚无有效疫苗.本研究旨在开发一款安全有效的疫苗以防控该病.采用P1、3CD共表达的构建策略,利用杆状病毒-昆虫细胞表达系统获得EMCV病毒样颗粒(virus-like particals,VLPs)并将其免疫小鼠,初步评价其在小鼠体内的免疫应答效果.结果显示,免疫组小鼠特异性抗体滴度达到1:192以上,中和抗体滴度达到1:64以上,且与ISA206佐剂混合使用可诱导机体产生更高的抗体水平.IL-4、IFN-γ、IL-5、TNF-α细胞因子水平均可达到20 pg·mL-1,且明显高于PBS组.综上,本研究获得的EMCV病毒样颗粒疫苗可以诱导机体产生良好的细胞免疫和体液免疫应答,还能诱导炎症细胞因子的产生,有助于激发机体的免疫反应,增强疫苗的保护效果,为EMCV的防控提供了理论依据和技术储备.
Expression and Identification of Porcine Encephalomyocarditis Virus-like Particles Based on Baculovirus-insect Cell Expression System
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 parti-cals of porcine encephalomyocarditis virus were assembled by using the baculovirus-insect cell ex-pression 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 lev-els 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 re-sponse,enhance the protective effect of the vaccine,and provide theoretical basis and technical reserve for the prevention and control of EMCV.

baculovirus-insect cell expression systemencephalomyocarditis virusvirus-like par-ticles

王运航、景伟、穆素雨、孙世琪、郭慧琛、白满元

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中国农业科学院兰州兽医研究所兰州大学动物医学与生物安全学院动物疫病防控全国重点实验室,兰州 730000

榆林学院生命科学学院,榆林 719000

杆状病毒-昆虫细胞表达系统 脑心肌炎病毒 病毒样颗粒

国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金科技人才与平台计划所长基金

2022YFD18006032021YFD1800300320728593207284732002272202205AF150007LVRI-SZJJ-202107

2024

10.11843/j.issn.0366-6964.2024.10.028

畜牧兽医学报
中国畜牧兽医学会

畜牧兽医学报

CSTPCD北大核心
影响因子：0.729
ISSN：0366-6964
年,卷(期)：2024.55(10)