A suicidal DNA vaccine expressing the fusion protein of peste des petits ruminants virus induces both humoral and cell-mediated immune responses in mice
文献类型: 外文期刊
第一作者: Wang, Yong
作者: Wang, Yong;Yue, Xiaolin;Pan, Ling;Wang, Guijun;Guo, Hao;Jin, Hongyan;Li, Gang;Liu, Guangqing;Li, Yongdong;Wang, Yong
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关键词: Fusion protein;Immune response;Peste des petits ruminants virus;Suicidal DNA vaccine
期刊名称:JOURNAL OF VIROLOGICAL METHODS ( 影响因子:2.014; 五年影响因子:2.001 )
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收录情况: SCI
摘要: Peste des petits ruminants (PPR), a highly contagious disease induced by PPR virus (PPRV), affects sheep and goats. PPRV fusion (F) protein is important for the induction of immune responses against PPRV. We constructed a Semliki Forest virus (SFV) replicon-vectored DNA vaccine ("suicidal DNA vaccine") and evaluated its immunogenicity in BALB/c mice. The F gene of PPRV was cloned and inserted into the SFV replicon-based vector pSCA1. The antigenicity of the resultant plasmid pSCA1/F was identified by indirect immunofluorescence and western blotting. BALB/c mice were then intramuscularly injected with pSCA1/F three times at 14-d intervals. Specific antibodies and virus-neutralizing antibodies against PPRV were quantified by indirect ELISA and microneutralization tests, respectively. Cell-mediated immune responses were examined by cytokine and lymphocyte proliferation assays. The pSCA1/F expressed F protein in vitro and induced specific and neutralizing antibody production, and lymphocyte proliferation in mice. Mice vaccinated with pSCA1/F had increased IL-2 and IL-10 levels after 24-h post first immunization. IFN-gamma and TNF-alpha levels increased from that time point and gradually decreased thereafter. Thus, the Semliki Forest virus replicon-vectored DNA vaccine expressing the F protein of PPRV induced both humoral and cell-mediated immune responses in mice. This could be considered as a novel strategy for vaccine development against PPR. (C) 2015 Elsevier B.V. All rights reserved.
分类号: R37
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