›› 2010, Vol. 37 ›› Issue (3): 71-74.

• 生物技术 • 上一篇    下一篇

单增李斯特菌ActA的表达、免疫原性研究及单克隆抗体的制备

张辉, 崔焕忠   

  1. (吉林农业大学动物科技学院, 长春 130118)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-03-20 发布日期:2010-03-20

Research on the Expression, Immunogenicity of ActA and Preparationof Monoclonal Antibodies to Listeria monocytogenes

ZHANG Hui, CUI Huan-zhong

  

  1. (College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-03-20 Published:2010-03-20

摘要: 原核表达单增李斯特菌(Lm)ActA蛋白并进行亲合层析纯化,检测ActA的免疫原性,以表达蛋白为检测抗原制备Lm单克隆抗体,并对单抗的亚型、效价、亲合力及特异性进行测定。结果表明,成功表达了ActA蛋白;表达蛋白诱导了特异性的细胞免疫和体液免疫,具有良好的免疫原性;共获得4株抗Lm ActA单克隆抗体。其中3G6、4E10和2B9为IgG1亚类;腹水抗体效价,3G6和4E10为1∶64000,2B9为1∶32000;3G6、4E10和2B9的亲和常数分别为6.62×107 M-1、5.67×107 M-1和7.15×106 M-1;3G6、2B4和4E10为Lm特异性单抗,2B9为致病性李斯特菌特异性单抗。所制备的单抗可用于Lm检测方法的建立。

关键词: 单增李斯特菌; ActA; 表达; 免疫原性; 单克隆抗体

Abstract: The ActA of Lm was expressed in E.coli and the immunogenicity of ActA was evaluated. The monoclonal antibodies(McAbs) were prepared using the purified ActA as detection antigen. The subclasses, titers, affinity constants and specificities of the McAbs were detected. The GST-ActA was expressed in E.coli and the ActA inducted specific humoral immunity and cellular immunity. Four hybridoma cell lines against Lm were obtained, three of which were IgG1. The antibody titers of ascitic fluid of 3G6, 4E10, 2B9 were 1∶64000, 1∶64000, 1∶32000 and the affinity qualities were 6.62×107 M-1, 5.67×107 M-1, 7.15×106 M-1 respectively. The specificity analysis showed that 3G6, 2B4, 4E10 were specific McAbs against Lm and 2B9 was specific McAbs against Lm and L.ivanovii. The McAbs can be used to establish detection method of Lm.

Key words: Listeria monocytogenes; ActA; expression; immunogenicity; monoclonal antibodies

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