Generation and Immunogenicity of a Recombinant Adenovirus Co-Expressing the E2 Protein of Classical Swine Fever Virus and the GP5 Protein of Porcine Reproduction and Respiratory Syndrome Virus

文献类型： 外文期刊

第一作者： Li Hong-yu

作者： Li Hong-yu;Sun Yuan;Zhang Xing-juan;Chang Tian-ming;Wang Xiang-peng;He Fan;Huang Jun-hua;Qiu Hua-ji

作者机构：

关键词： porcine reproductive and respiratory syndrome virus;classical swine fever virus;recombinant adenovirus;immunogenicity

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2011 年 10 卷 11 期

页码：

收录情况： SCI

摘要： Classical swine fever (CSF) and porcine reproduction and respiratory syndrome (PRRS) are both economically important, highly contagious diseases of swine worldwide. To develop an effective vaccine to control these two diseases, we constructed a recombinant adenovirus rAdV-GP52AE2, using a replication-defective human adenovirus serotype 5 as a delivery vector, to co-express the GP5 protein of highly pathogenic porcine reproduction and respiratory syndrome virus (PRRSV) and the E2 protein of classical swine fever virus (CSFV). Foot-and-mouth disease virus (FMDV) 2A peptide was used as a linker between the GP5 and E2 proteins to allow automatic self-cleavage of the polyprotein. The GP5 and E2 genes were expressed as demonstrated by immunofluorescence assay and Western blotting. Immunization of mice resulted in a CSFV-neutralizing antibody titer of 1:128 and a PRRSV-neutralizing antibody titer of 1:16. The lymphoproliferative responses were detected by Cell Counting Kit-8 assay and the stimulation index of CFSV-specific and PRRSV-specific lymphocytes in the rAdV-GP52AE2 group was significantly higher than that in the negative control group. The results show that rAdV-GP52AE2 can induce both effective humoral and cell-mediated immune responses in mice. The protective efficacy of the recombinant virus against CSF was evaluated in immunized rabbits, which were protected from fever induced by challenge with C-strain. Our study provides supporting evidence for the use of FMDV 2A to develop a bivalent genetically-engineered vaccine.

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