生物技术通报 ›› 2013, Vol. 0 ›› Issue (4): 194-200.

• 研究报告 • 上一篇    下一篇

草鱼IgM 的纯化、标记及检测方法的建立

田园园 叶星 张莉莉   

  1. 中国水产科学研究院珠江水产研究所 农业部热带亚热带水产资源利用与养殖重点实验室,广州 510380
  • 收稿日期:2012-08-27 修回日期:2013-04-22 出版日期:2013-04-22 发布日期:2013-04-22
  • 作者简介:田园园,女,助理研究员,硕士,研究方向:水产病毒学;E-mail :tianyuan320@163.com
  • 基金资助:
    广东省重点科技项目(2008A020100016),广东省海洋渔业科技项目(A200899F01,A201101G01),广州市和荔湾区科技项目 (2009J1-C021,20084411115)

Purification,Tag and Method for Detection of Grass Carp Serum IgM

Tian Yuanyuan, Ye Xing, Zhang Lili   

  1. Key Lab of Tropical & Subtropical Fishery Resource Application & Cultivation,Ministry of Agriculture ;Pearl River Fisheries Research Institute of Chinese Academy of Fishery Sciences,Guangzhou 510380
  • Received:2012-08-27 Revised:2013-04-22 Published:2013-04-22 Online:2013-04-22

摘要: 通过Protein A 亲和层析法分离纯化草鱼血清中的免疫球蛋白IgM,SDS-PAGE 检测产物的纯度及分子量,用纯化 产物免疫兔制备多克隆抗体,并用辣根过氧化物酶标记此兔抗草鱼IgM 抗体,用于检测经草鱼出血病病毒广东株(GCRV-GD108) 衣壳蛋白VP4 及VP5 免疫草鱼后产生的抗体水平。结果表明,纯化后的草鱼IgM 轻链及重链分子量分别在25 kD 和75 kD 左右, 所制备的草鱼标记抗体可应用于草鱼血清IgM 水平的快速检测。建立了标记抗体检测草鱼抗血清的方法,为进一步研究病原体入 侵感染机制、草鱼的免疫防御机理和疫苗效果评价等提供便捷的血清学检测方法。

关键词: 免疫球蛋白, 多克隆抗体, ELISA, 辣根过氧化物酶, GCRV-GD108, 株, 疫苗效果评价

Abstract: Protein A affinity chromatography was used to purify immunoglobulin IgM from grass carp serum, and the purity and molecular weight of the product was analyzed by SDS-PAGE. Rabbit polyclonal antibodies of the purified grass carp IgM were prepared and detected by ELISA. The results showed that molecular weights of the light chain and heavy chain of the purified grass carp IgM were about 25 kD and 75 kD, respectively, and high titers of rabbit anti-grass carp IgM antiserum was obtained. Horseradish peroxidase was used to label the rabbit anti-grass carp IgM antibody. The labeled antibody was used to detect the antibody levels in serum of grass carp after immunizing by capsid protein VP4 and VP5 of grass carp hemorrhage virus isolated from Guangdong province(GCRV-GD108). The results revealed that the labeled anti-grass carp IgM antibody could be used for the rapid detection of the IgM levels in grass carp serum. In this study, method to detect IgM levels in grass carp serum was established, which would provide a convenient method of serological testing for further study of pathogen invasion mechanism, grass carp immune defense mechanism and evaluation of grass carp vaccine effectiveness.

Key words: Immunoglobulin, Polyclonal antibodies ELISA, Horseradish peroxidase, GCRV-GD108 strain, Evaluation of vaccine effectiveness