畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (2): 279-287.doi: 10.11843/j.issn.0366-6964.2015.02.015

• 预防兽医 • 上一篇    下一篇

三株递呈猪流行性腹泻病毒S基因的减毒鼠伤寒沙门菌的生物学特性研究

梁恩涛1,陈杰1,黄小波1,2*,文心田1,2,曹三杰1,2,吴学婧1,朱书权1   

  1. (1.四川农业大学动物医学院,动物传染病与基因芯片实验室,雅安 625014;2.四川农业大学人兽共患病研究室与猪病防治研究中心,成都 611130)
  • 收稿日期:2014-06-07 出版日期:2015-02-23 发布日期:2015-02-25
  • 通讯作者: 黄小波,教授,E-mail:rsghb110@126.com
  • 作者简介:梁恩涛(1989-),男,河南平顶山人,硕士生,主要从事猪流行性腹泻新型口服疫苗的研究,E-mail:pdsliangentao@sina.com;陈杰(1992-),男,四川绵竹人,硕士生,主要从事猪流行性腹泻疫苗的研究,E-mail:chenjie1992@sina.com。二人并列第一作者
  • 基金资助:

    国家自然科学基金(31072144;30901084);国家公益性行业(农业)科研专项(20123056)

Study on the Biological Characteristics of Three Attenuated Salmonella typhimurium Strains Harboring Porcine Epidemic Diarrhea Virus S Gene

LIANG En-tao1,CHEN Jie1,HUANG Xiao-bo1,2*,WEN Xin-tian1,2,CAO San-jie1,2,WU Xue-jing1,ZHU Shu-quan1   

  1. (1.Key Laboratory of Animal Disease and Human Health of Sichuan Province,College of Veterinary Medicine,Sichuan Agricultural University,Ya’an 625014,China;2.Laboratory of Zoonosis and Pig Disease Prevention Research Center,Sichuan Agricultural University,Chengdu 611130,China)
  • Received:2014-06-07 Online:2015-02-23 Published:2015-02-25

摘要:

为了探究减毒沙门菌递呈不同长度猪流行性腹泻病毒(PEDV)S基因的可行性,本研究对3株携带不同长度S基因片段的减毒鼠伤寒沙门菌进行了生物学特性评估。主要进行了对所构建的重组减毒沙门菌菌株SL7207(pVAX-S499-650)(长456 bp,编码 S蛋白N末端499—650位氨基酸)、SL7207(pVAX-S499-789)(长873 bp,编码S蛋白N末端499—789位氨基酸)和前期构建的菌株SL7207(pVAXD-S1-789)(长2 367 bp,编码S蛋白N末端1—789位氨基酸)的生物学特性研究,包括生长曲线测定、携带质粒的体内/外稳定性、回肠组织内的转录、在小鼠体内动态增殖规律、小鼠口服的安全性等。结果表明:SL7207(pVAX-S499-650)、SL7207(pVAX-S499-789)、SL7207(pVAXD-S1-789)3种口服菌株均具有较高的稳定性;携带的目的基因可在肠道组织内转录;菌株在小鼠肝、脾中增殖约5周后逐渐被机体清除;小鼠口服具有良好的安全性。本研究结果表明减毒鼠伤寒沙门菌SL7207可递呈不同长度的S基因抗原片段,为后续开展3种菌株的实际口服免疫效果比较研究奠定了基础。

关键词: 猪流行性腹泻病毒, S基因, 减毒鼠伤寒沙门菌, 口服, 生物学特性

Abstract:

To explore the feasibility of attenuated Salmonella typhimurium as the carrier of porcine epidemic diarrhea virus (PEDV) S gene,the biological characteristics of three recombinant attenuated Salmonella strains harboring varying length of PEDV S gene were researched.The biological characteristics research of SL7207(pVAX-S499-650) (456 bp,encoding 499-650 amino acid of N-termanal S protein,SL7207(pVAX- S499-789) (873 bp,encoding 499-789 amino acid of N-termanal S protein),SL7207(pVAXD-S1-789) (2 367 bp,encoding 1-789 amino acid of N-termanal S protein) which harboring PEDV S genes in varying length plasmid DNA showed:SL7207(pVAX-S499-650),SL7207(pVAX-S499-789) and SL7207(pVAXD-S1-789) were steady in vivo/vitro;the target genes could be transcribed in the ileum tissue of mouse;recombinant strains could colonize in liver and spleen of mice and gradually eliminated by host;safety to BALB/c mouse at the dosage of 1×109 CFU by oral administration.All of this,demonstrating the attenuated S.typhimurium could be the carrier of PEDV S gene and laying the foundation for evaluating the immunogenicity of recombinant attenuated Salmonella strains in piglet.

Key words: porcine epidemic diarrhea virus, S gene, attenuated Salmonella typhimurium, oral administration, biological characteristics

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