中国寄生虫学与寄生虫病杂志 ›› 2014, Vol. 32 ›› Issue (4): 19-322-323.

• 研究简报 • 上一篇    下一篇

抗弓形虫β微管蛋白小分子抗原肽多克隆抗体的制备及鉴定

毛小勇1,华倩倩2,李相志2,姚丽丽2,谭峰2 *   

  1. 1 温州医科大学附属诸暨医院,诸暨 311800;
    2 温州医科大学基础医学院,温州 325035
  • 出版日期:2014-08-30 发布日期:2014-10-31

Preparation and Identification of Polyclonal Antibody against Small Peptides of β-tubulin of Toxoplasma gondii

MAO Xiao-yong1,HUA Qian-qian2,LI Xiang-zhi2,YAO Li-li2,TAN Feng2 *   

  1. 1 The Affiliated Zhuji Hospital of Wenzhou Medical University,Zhuji 311800,China;2 School of Basic Medical Sciences,Wenzhou Medical University,Wenzhou 325035,China
  • Online:2014-08-30 Published:2014-10-31

摘要:  对弓形虫GT1株、ME49株和人的β微管蛋白的氨基酸序列进行生物信息学分析。根据生物信息学分析结果,人工合成弓形虫β微管蛋白氨基酸序列C端小分子抗原肽。用合成的抗原肽免疫日本大耳兔,每2周免疫1次,0.5 mg/(只·次),共5次。末次免疫后2周,收集兔血清,ELISA检测血清中特异性抗体效价,蛋白质印迹(Western blotting)检测该多克隆抗体与弓形虫RH株、ME49株和PRU株速殖子蛋白的免疫反应。生物信息学分析结果表明,弓形虫GT1株与ME49株的β微管蛋白的氨基酸序列完全一致,与人的β微管蛋白氨基酸序列同源性为98%,差异氨基酸主要集中在C端。经5次免疫后,ELISA证实兔血清中抗体效价为1 ∶ 52 800。Western blotting分析结果显示,该多克隆抗体可分别与弓形虫RH株、ME49株和PRU株的β微管蛋白特异性结合。

关键词: 刚地弓形虫, &beta, -微管蛋白, 多克隆抗体

Abstract: The amino acid sequences of β-tubulin from Toxoplasma gondii stains (GT1 and ME49) and human were aligned by ClustalW2 software. Based on the alignment result, the C-terminal peptides of β-tubulin of T. gondii were artificially synthesized. Rabbits were immunized with 0.5 mg synthesized peptides for five times at 2-week intervals. Serum samples were collected at the second week after the final immunization, and were analyzed for specific antibodies by ELISA. Finally, the specific-β-tubulin polyclonal antibody was evaluated by Western blotting with the total protein of RH strain, ME49 strain, and PRU strain of T. gondii, respectively. The results showed that β-tubulin of T. gondii stains(GT1 and ME49) shared 100% amino-acid sequence identity, and there was 98% amino acid homology between T. gondii and human. The main variable region was the C-terminus. After the fifth immunization, the titers of polyclonal antibody reached 1 ∶ 52 800. Western blotting result indicated that the specific-β-tubulin polyclonal antibody reacted with β-tubulin in all the three strains (RH, ME49, and PRU), respectively.

Key words: Toxoplasma gondii;&beta, -tubulin;Polyclone antibody