A combined DNA vaccine encoding BCSP31, SOD, and L7/L12 confers high protection against brucella abortus 2308 by inducing specific CTL responses

作者：Yu Da Hai; Hu Xi Dan; Cai Hong^*

来源：DNA and Cell Biology, 2007, 26(6): 435-443.

DOI：10.1089/dna.2006.0552

We constructed a combined DNA vaccine comprising genes encoding the antigens BCSP31, superoxide dismutase (SOD), and L7/L12 and evaluated its immunogenicity and protective efficacy. Immunization of mice with the combined DNA vaccine offered high protection against Brucella abortus (B. abortus) infection. The vaccine induced a vigorous specific immunoglobulin G (IgG) response, with higher IgG2a than IgG1 titers. Cytokine profiling performed at the same time showed a biased Th1-type immune response with significantly increased interferon-gamma and tumor necrosis factor-a stimulation. CD8(+), but not CD4(+), T cells accumulated at significantly higher levels after administration of the vaccine. Granzyme B-producing CD8(+) T cells were significantly higher in number in samples prepared from combined DNA-vaccinated mice compared with S19-vaccinated mice, demonstrating that the cytotoxicity lysis pathway is involved in the response to Brucella infection. The success of our combined DNA vaccine in a mouse model suggests its potential efficacy against brucellosis infection in large animals.

• 出版日期2007-6
• 单位北京大学; 新疆畜牧科学院