畜牧兽医学报

• 预防兽医 • 上一篇    下一篇

基于狂犬病病毒重组蛋白的ELISA检测方法比较研究

程朝飞1#,宫苗苗1#,田康乐1,王勇1,2,赵占中1,史利军1,李刚1*   

  1. (1. 中国农业科学院北京畜牧兽医研究所 动物营养学国家重点实验室,北京 100193;2. 中国农业大学动物医学院,北京 100193)
  • 收稿日期:2012-07-02 出版日期:2012-12-26 发布日期:2012-12-26
  • 通讯作者: 李刚,教授,E-mail:gli358@ Gmail.com
  • 作者简介:程朝飞(1987-),男,河南登封人,硕士,主要从事动物重大疫病的防控与诊断,E-mail: donwuyixue217@163.com,Tel:010-62813876;宫苗苗(1985-),女,山东泰安人,硕士,主要从事预防兽医学研究。二人共同为第一作者
  • 基金资助:

    国家高技术研究发展计划 (863 计划) (2008AA10Z411);北京市科委项目 (Z07010501780701);国家公益行业项目 (20083014;200903037-2)

Comparative Study on the Indirect ELISA Methods Based on the Different Recombinant Proteins of Rabies Virus

CHENG Chao-fei1#,GONG Miao-miao1#,TIAN Kang-le1,WANG Yong1,2,ZHAO Zhan-zhong1,SHI Li-jun1,LI Gang1*   

  1. (1. State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; 2. College of Veterinary Medicine, China Agricultural University, Beijing 100193, China)
  • Received:2012-07-02 Online:2012-12-26 Published:2012-12-26

摘要:

原核表达狂犬病病毒的基质蛋白(M),并以此作为包被抗原建立间接ELISA检测方法,与以狂犬病病毒磷蛋白(P)作为包被抗原建立的间接ELISA方法进行比较。根据GenBank中公布的狂犬病病毒LEP-Flury株M基因序列设计特异性引物并引入SmaⅠ和NotⅠ酶切位点,经RT-PCR扩增得到目的基因,连接pCR®2.1载体,构建重组质粒pCR-RV-M,重组质粒用SmaⅠ和NotⅠ进行双酶切,酶切产物定向克隆至原核表达载体pGEX-6P-1中,构建重组表达载体pGEX-RV-M。将重组表达载体转化E.coli BL21(DE3)感受态细胞,使用IPTG诱导表达目的蛋白,SDS-PAGE分析表明蛋白表达量较大,且主要以可溶性的形式表达。亲和层析纯化目的蛋白,Western blot表明融合蛋白具有良好的反应原性,使用纯化的融合蛋白作为包被抗原建立了间接ELISA方法并检测了95份血清,同时使用带有His标签的重组狂犬病病毒磷蛋白P(RV-His-P)建立的ELISA方法和商品化的ELISA试剂盒检测该血清。结果表明:与商品化的以全病毒作为包被抗原的ELISA检测试剂盒相比,使用重组P蛋白作为包被抗原建立的间接ELISA检测方法具有更高的符合率,能够代替全病毒作为诊断抗原建立检测方法。

Abstract:

This study was designed to compare the indirect ELISA methods for detection of dog antibodies against rabies virus based on the recombinant matrix protein (M) and phosphoprotein (P). The M gene of rabies virus LEP-Flury strain was amplified by PCR and cloned into prokaryotic expression vector pGEX-6P-1. The resultant constructed pGEX-RV-M plasmid was transformed into BL21 (DE3) and protein expression was analyzed by SDS-PAGE and Western blot. The results of SDS-PAGE showed that the M protein was efficiently expressed, which were mainly soluble, and purified with the affinity chromatography. The results of Western blot indicated that the recombinant protein M showed good immunogenicity. The indirect ELISA method was established with the purified recombinant protein M, and a total of 95 serum samples were detected by the method and the indirect ELISA method based on the recombinant protein P respectively. The results showed that compared with the commercially available ELISA kit coating RV as antigen, the indirect ELISA method based on recombinant protein P had a higher coincidence rate, and it can replace the ELISA method based on RV.

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