中国寄生虫学与寄生虫病杂志 ›› 2006, Vol. 24 ›› Issue (1): 18-69.

• 研究简报 • 上一篇    下一篇

弓形弓形虫抗原检测方法的研究

李辉;许汴利;邓艳;赵旭东;蔺西萌;闫旭霞   

  1. 河南省疾病预防控制中心,郑州450003
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-02-28 发布日期:2006-02-28

Study on the Methods for Detection of Toxoplasma Antigen

LI Hui;XU Bian-li;DENG Yan;ZHAO Xu-dong;LIN Xi-meng;YAN Xu-xia   

  1. Henan Provincial Center for Disease Control and Prevention,Zhengzhou 450003,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-02-28 Published:2006-02-28

摘要: 本研究制备了与多种寄生虫抗原无交叉反应的抗弓形虫单抗B6C3和兔抗弓形虫多抗,多抗为捕获抗体,单抗为检测抗体,建立单-多抗夹心ELISA方法。用亲和素连接分别标记生物素的抗体和酶,建立ABC(avidin-biotin-peroxidase complex)-ELISA[D1]方法。同样用亲和素连接标记生物素的抗体和DNA片段,利用PCR反应对DNA片段巨大的扩增能力,提高检测灵敏度,发展单-多抗夹心ELISA为免疫-PCR(I-PCR)检测弓形虫抗原。单-多抗夹心ELISA检测弓形虫抗原最低浓度为0.6μg/ml,ABC-ELISA检测最低浓度为0.075μg/ml。I-PCR检测最低浓度为0.1ng/ml,检测弓形虫抗原灵敏度高于传统ELISA法6000倍,高于ABC-ELISA法750倍。

关键词: 弓形虫, 抗原, 免疫测定

Abstract: A sandwich ELISA was established with monoclonal antibody as detecting antibody and rabbit anti- Toxoplasma polyclonal antibody as capturing antibody. ABC(avidin-biotin-peroxidase complex)-ELISA and immuno-PCR were also used to detect different concentrations of Toxoplasma antigen. The lowest concentration of antigen to be detected by sandwich ELISA, ABC-ELISA and immuno-PCR was 0.6 μg/ml, 0.075 μg/ml and 0.1 ng/ml respectively. The immuno-PCR shows a much higher sensitivity than the other two methods.

Key words: Toxoplasma, Antigen, Immunoassay