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Enhanced immunogenicity induced by an alphavirus replicon-based pseudotyped baculovirus vaccine against porcine reproductive and respiratory syndrome virus

文献类型： 外文期刊

作者： Wu, Qunfeng 1 ; Xu, Fengqin 1 ; Fang, Liurong 1 ; Xu, Jinfang 1 ; Li, Bin 1 ; Jiang, Yunbo 1 ; Chen, Huanchun 1 ; Xiao, S 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Vet Med, Div Anim Infect Dis, State Key Lab Agr Microbiol, Wuhan 430070, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Vet Med, Nanjing 210014, Peoples R China

关键词： Pseudotyped baculovirus;Alphavirus replicon;Apoptosis;PRRSV;Immune response

期刊名称：JOURNAL OF VIROLOGICAL METHODS （ 影响因子：2.014； 五年影响因子：2.001 ）

ISSN： 0166-0934

年卷期： 2013 年 187 卷 2 期

页码：

收录情况： SCI

摘要： Pseudotyped baculovirus has emerged as a promising vector for vaccine development and gene therapy. Alphaviruses, such as Semliki Forest virus (SFV), have also received considerable attention for use as expression vectors because of their self-replicating properties. In this study, pseudotyped baculovirus containing the hybrid cytomegalovirus (CMV) promoter/SFV replicon was used as a vector to co-express the GP5 and M proteins of porcine reproductive and respiratory syndrome virus (PRRSV). The immunogenicity of the resulting recombinant baculovirus (BV-SFV-5m6) was compared with the pseudotyped baculovirus vaccine (BV-CMV-5m6), in which the expression of GP5 and M were driven by the CMV promoter only. In vitro, BV-SFV-5m6 exhibited enhanced expression of foreign proteins and also caused apoptosis in transduced cells. After immunization in BALB/c mice, BV-SFV-5m6 induced strong GP5-specific ELISA antibodies and neutralizing antibodies against homologous and heterologous viruses, along with dose sparing. Further analysis of the cell-mediated immune response showed that BV-SFV-5m6 elicited a Th1-dominant immune response that was greater than that elicited by BV-CMV-5m6. Taken together, the results of this study indicate that a baculovirus containing the hybrid CMV promoter/alphavirus replicon can be utilized as an alternative strategy to develop an efficacious vaccine against PRRSV infection. (c) 2012 Elsevier B.V. All rights reserved.

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