文献类型： 外文期刊

作者： Hu, Xi-Dan ² ; Chen, Su-Ting ¹ ; Li, Jia-Yun ¹ ; Yu, Da-Hai ¹ ; Yi-zhang ¹ ; Cai, Hong ¹ ;

作者机构： 1.Peking Univ, Coll Life Sci, Natl Lab Prot Engn & Plant Genet Engn, Beijing 100871, Peoples R China

2.Xinjiang Acad Anim Sci, Inst Vet Med, Urumqi 830000, Peoples R China

关键词： Infection;Immune System: Chemical Coordination and Homeostasis;Blood and Lymphatics: Transport and Circulation;Molecular Genetics: Biochemistry and Molecular Biophysics

期刊名称：VACCINE （ 影响因子：3.641； 五年影响因子：3.816 ）

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收录情况： SCI

摘要： We investigated whether a combined DNA vaccine delivered together with the IL-15 gene (DNA-IL-15(+)) enhanced the immune response against Brucella abortus in mice. Mice vaccinated with DNA-IL-15(+) developed a robust humoral response; Brucella-specific antibodies exhibited a dominance of immunoglobulin G2a (IgG2a) over IgG1. Splenocytes from DNA-IL-15(+)-vaccinated mice induced significantly higher levels of IFN-gamma (P < 0.01) and CD8(+) T cell response (P < 0.01), suggesting induction of a T-helper-l-dominated immune response. In a specific cytotoxic-T-lymphocyte activity assay, DNA-IL-15(+) immunization elicited mainly CD8(+) T cells, which mediate cytotoxicity, but also CD4(+) T cells. In vivo depletion of T cell subsets showed that the DNA-IL-15(+)-induced protection against Brucella infection is mediated predominantly by CD8(+) T cells, although CD4(+) T cells also contribute. These data indicate that plasmid-delivered IL-15 increases the efficacy of the Brucella DNA vaccine.