畜牧兽医学报 ›› 2008, Vol. 39 ›› Issue (11): 1548-1553.doi:

• 预防兽医 • 上一篇    下一篇

非洲马瘟病毒VP7基因拼接、表达及重组ELISA方法的建立与初步应用

高志强,张鹤晓*,赖平安,谷强,蒲静,汪琳,乔彩霞,吴丹,柏亚铎,张伟   

  1. 北京出入境检验检疫局动物检疫中心,北京101113
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-11-24 发布日期:2008-11-24
  • 通讯作者: 张鹤晓

Development and Application of the Recombinant ELISA Based on the Assembling and Expression of VP7 Gene of African Sickness Virus

GAO Zhi-qiang,ZHANG He-xiao*,LAI Ping-an,GU Qiang,PU Jing,
WANG Lin,QIAO Cai-xia,WU Dan,BAI Ya-duo,ZHANG Wei
  

  1. Animal Quarantine Center of Beijing EntryExit Inspection and Quarantine Bureau, Beijing 101113, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-11-24 Published:2008-11-24

摘要: 采用人工拼接的方式拼接了非洲马瘟病毒(AHSV)含有绝大多数线性抗原表位的VP7编码基因片段,克隆于pET-30a构建重组质粒pET-30a-VP7,将pET-30a-VP7转化BL21(DE3),经1.0 mmol/L IPTG 诱导,外源基因以包涵体的形式获得高效表达。通过Dot-ELISA以及ELISA试验证明表达产物具有良好的反应原性。以纯化后表达产物作为诊断抗原包被酶标板建立了检测AHSV抗体的间接ELISA 方法。结果表明,抗原的最佳包被浓度为0.25 μg/mL,血清的最佳稀释度为1∶40,待检血清阳性临界值初步定为0.25。用此方法和商品化ELISA试剂盒检测了184份血清样品,结果完全符合。

Abstract: A DNA fragment, which encodes the most linear epitopes of VP7 of African sickness virus(AHSV), was assembled artificially, then cloned into pET-30a. Target protein expressed at very high level as inclusion body after the recombinant pET-30a-VP7 plasmid was transformed into BL21(DE3), and induced with 1.0 mmol/L IPTG. The indirect ELISA for detecting AHSV VP7 protein antibody was established after the reaction activity of the recombinant protein was determined by Dot-ELISA and ELISA. The results obtained indicated that the optimum antigen concentration was 0.25 μg/mL, and optimum serum dilution was 1∶40. The cut-off value was determined as 0.25. 184 serum samples were detected by this method and commercial ELISA kit and the results were all negative.