中国畜牧兽医

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串联表达猪繁殖与呼吸综合征病毒GP5表位蛋白间接ELISA方法的建立

陈如敬,吴学敏,车勇良,王隆柏,刘玉涛,严山,魏宏,庄向生,周伦江   

  1. (福建省农业科学院畜牧兽医研究所/福建省畜禽疫病防治工程技术研究中心,福建福州 350013)
  • 收稿日期:2013-10-14 出版日期:2014-04-20 发布日期:2014-05-27
  • 通讯作者: 周伦江(1973—),男,福建人,研究员,博士,研究方向:动物传染病。E-mail:lunjiang@163.com
  • 作者简介:陈如敬(1984—),男,福建人,硕士生,助理研究员,研究方向:动物传染病。
  • 基金资助:

    福建省财政专项——福建省农业科学院创新团队建设项目(STIF-Y02);福建省农科院青年人才科技创新基金(2012DQB-6)。

Development of an Indirect ELISA Assay for Detecting Antibody to Porcine Reproductive and Respiratory Syndrome Virus with Recombinant GP5-encoding-epitopes Protein

CHEN Ru-jing, WU Xue-min, CHE Yong-liang, WANG Long-bai, LIU Yu-tao, YAN Shan, WEI Hong, ZHUANG Xiang-sheng,ZHOU Lun-jiang   

  1. Institute of Animal Husbandry and Veterinary Medicine/Fujian Animal Disease Control Technology Development Center, Fujian Academy of Agricultural Sciences, Fuzhou 350013,China)
  • Received:2013-10-14 Online:2014-04-20 Published:2014-05-27

摘要: 利用猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)GP5抗原表位串联表达重组蛋白作为包被抗原,建立检测PPRSV抗体的间接ELISA方法。重组蛋白最佳包被浓度为7.5 μg/mL,最佳封闭液为5%脱脂奶粉,37 ℃封闭2 h;血清最适稀释度为1∶100,37 ℃作用2 h;兔抗猪IgG/辣根酶(HRP)(1∶3000),37 ℃作用2 h;37 ℃避光显色15 min读取D450 nm值。结果经统计学分析得出,S/P值≥0.254为阳性,S/P值≤0.212为阴性。所建立的ELISA方法检测其他5种猪常见病原阳性血清,其D450 nm值均小于0.212。利用建立的ELISA方法对临床免疫勃林格殷格翰猪繁殖与呼吸综合征活疫苗4周后的猪血清70份进行检测,其D450 nm值均大于0.85,表明本研究建立的重组GP5表位蛋白间接ELISA方法可用于临床样品的监测。

关键词: 猪繁殖与呼吸综合征病毒; 重组GP5表位蛋白; 间接ELISA

Abstract: An indirect ELISA assay was constructed to detect porcine reproductive and respiratory syndrome virus (PRRSV) antibodies with recombinant GP5-encoding-epitopes protein.The optimal concentration of antigen was 7.5 μg/mL; The blocking buffer was 5% defatted milk powder with the blocking time 2 h,at 37 ℃;The serum sample was diluted in 1∶100 with incubated for 2 h at 37 ℃;The dilution of rabbit-anti-porcine IgG labeled by HRP was diluted in 1∶3000 with incubated for 2 h at 37 ℃;The TMB substrate was added and incubated at 37 ℃ for 15 min and then terminated with stopping solution. The standard of judgment was that the serum sample D450 nm value with S/P≥0.254 was positive, and the sample D450 nm value with S/P≤0.212 was negative. The recombinant antigen had no cross-reaction with antibodies of other five porcine diseases. 70 serum samples collected from pigs which were vaccinated with Ingelvac PRRS MLV were detected by this assay, the D450 nm value of which were higher than 0.85. The results demonstrated that the establishment indirect ELISA method could be used for monitoring PRRSV antibody.

Key words: porcine reproductive and respiratory syndrome virus (PRRSV); recombinant GP5-encoding-epitopes protein; indirect ELISA