新孢子虫与弓形虫交叉抗原AMA1基因重组腺病毒的构建及免疫应答分析

doi:10.16431/j.cnki.1671-7236.2016.12.037

Abstract

Abstract:

In order to establish AMA1 recombinant adenovirus of Neospora caninum (N.caninum) and Toxoplasma gondii (T.gondii), and analyze the immunogenicity of it, cross universal primers were designed according to the open reading frame of N. caninum and T. gondii AMA1 gene sequences. Based on pMD18T-NcAMA1 and pMD18T-TgAMA1 cloning plasmid, recombinant adenovirus shuttle plasmid ADV4-Nc/TgAMA1 was constructed. Then, ADV4-Nc/TgAMA1 and pacAd5 backbone plasmid were linearized and co-transfected 293T cells. After packaging recombinant adenovirus and measuring the virus titer, collected virus was inoculated into BALB/c mice, confirmed the IgG antibody levels by indirect ELISA method. The results showed that Nc/TgAMA1 was expressed in Ad5-Nc/TgAMA1 recombinant adenovirus, Ad5-Nc/TgAMA1 recombinant adenovirus titer was 10⁹ PFU/mL. IgG antibody levels in the Ad5-Nc/TgAMA1 vaccinated group were significantly higher than pVAX1-Nc/TgAMA1 plasmid group and PBS control group. This result indicated that the constructed Ad5-Nc/TgAMA1 recombinant adenovirus could induce specific humoral immune response in mice, this research laid a solid foundation for the development of a recombinant adenovirus vaccine against N. caninum and T. gondii.

Key words: Neospora caninum; Toxoplasma gondii; AMA1 gene; recombinant adenovirus; immune response

CLC Number:

S852.7

LI Hang, JIANG Li-jian, LIU Jin-yu, LAN Lan, LING Fang-fang, SHI Tian-tian, ZHANG He-yang, JIA Li-jun. Construction and Analysis of Immune Response of Neospora caninum and Toxoplasma gondii Cross Recombinant Adenovirus Antigen AMA1 Gene[J]. , 2016, 43(12): 3336-3342.

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Construction and Analysis of Immune Response of Neospora caninum and Toxoplasma gondii Cross Recombinant Adenovirus Antigen AMA1 Gene

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