河南农业科学 ›› 2022, Vol. 51 ›› Issue (11): 127-134.DOI: 10.15933/j.cnki.1004-3268.2022.11.015

所属专题: 动物新型疫苗专题

• 畜牧·兽医 • 上一篇    下一篇

猪流行性腹泻病毒S1 蛋白的免疫原性评估

陈维聪1,刘运超2,周川杰2,杨苏珍2,魏蔷2,柴书军2,张改平1,2,3   

  1. (1.西北农林科技大学 动物医学院,陕西 杨凌 712100;2.河南省农业科学院 动物免疫学重点实验室,河南 郑州 450002;3.扬州大学江苏高校动物重要疫病与人兽共患病防控协同创新中心,江苏 扬州 225009)
  • 收稿日期:2022-03-17 出版日期:2022-11-15 发布日期:2023-01-10
  • 通讯作者: 张改平(1960-),男,河南内黄人,研究员,中国工程院院士,博士,主要从事动物病毒分子致病机制研究。E-mail:zhanggaip@126.com
  • 作者简介:陈维聪(1995-),女,陕西渭南人,在读硕士研究生,研究方向:病原微生物与分子免疫学。E-mail:625901477@qq.com
  • 基金资助:
    国家重点研发计划项目(2016YFD0500704)

Immunogenicity Evaluation of Porcine Epidemic Diarrhea Virus S1 Protein

CHEN Weicong1,LIU Yunchao2,ZHOU Chuanjie2,YANG Suzhen2,WEI Qiang2,CHAI Shujun2,ZHANG Gaiping1,2,3   

  1. (1.College of Veterinary Medicine,Northwest A&F University,Yangling 712100,China;2.Key Laboratory of Animal Immunology,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;3.Jiangsu Co‑innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses,Yangzhou University,Yangzhou 225009,China)
  • Received:2022-03-17 Published:2022-11-15 Online:2023-01-10

摘要: 为了评估猪流行性腹泻病毒(PEDV)S1蛋白的免疫原性,利用果蝇胚胎S2细胞表达重组S1蛋白,将纯化的S1蛋白免疫4周龄昆明小鼠,收集免疫血清及脾淋巴细胞,通过ELISA、病毒中和试验和流式细胞术等方法分析表达的重组S1蛋白的免疫原性。结果显示,与对照组(PBS)相比,重组PEDV S1蛋白免疫组小鼠血清中特异性IgG抗体水平显著提升;二免后14 d,果蝇细胞重组PEDV S1蛋白免疫组小鼠的中和抗体效价达到1∶320;免疫后小鼠脾脏淋巴细胞具有更强的增殖能力;外周血CD3+T细胞百分比显著增加,CD4+/CD8+T细胞比值高于对照组;小鼠血清中IL-4、IFN-γ水平显著上升。综上,成功表达了重组PEDV S1蛋白,其可以诱导小鼠产生高效价的中和抗体,促进细胞免疫应答。

关键词: 猪流行性腹泻病毒, S1蛋白, 果蝇胚胎S2细胞, 免疫原性, 中和性抗体

Abstract: In order to evaluate the immunogenicity of porcine epidemic diarrhea virus(PEDV)S1 protein,Drosophila melanogaster embryo S2 cells were used to express recombinant S1 protein.The 4‑week old Kunming mice were immunized with purified S1 protein,and the serum and spleen lymphocytes were collected.The immunogenicity of the expressed recombinant S1 protein was analyzed by ELISA,virus neutralization test and flow cytometry. The results showed that,compared with the control group(PBS),the level of specific IgG antibody in serum of mice immunized with recombinant PEDV S1 protein was significantly increased. At 14 days after the second immunization,the neutralizing antibody titers of mice immunized with recombinant PEDV S1 protein was 1∶320.The splenic lymphocytes of immunized mice had stronger proliferative ability.The percentage of peripheral blood CD3+T cells increased significantly,and the ratio of CD4+/CD8+T cells was higher than that of the control group. The content of IL‑4 and IFN‑γ in mice serum increased significantly. In summary,the recombinant PEDV S1 protein is successfully expressed,and it can induce mice to produce high titer neutralizing antibody and promote cellular immune response.

Key words: Porcine epidemic diarrhea virus, S1 protein, Drosophila embryonic S2 cell, Immunogenicity, Neutralizing antibody

中图分类号: