期刊
VACCINE
卷 22, 期 27-28, 页码 3622-3627出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2004.03.029
关键词
DNA prime-protein boost; Mycobacterium tuberculosis; ESAT6 antigen; DNA vaccine
The study evaluated the immune response elicited by a DNA vaccine encoding ESAT6 protein of Mycobacterium tuberculosis by DNA prime-protein boost protocol. BALB/c mice were respectively vaccinated with plasmid DNA encoding ESAT6 protein, with ESAT6 protein in IFA adjuvant, or a combined DNA prime-protein boost regimen. While DNA immunization induced Th-1-polarized immune response, protein-in-adjuvant vaccination elicited a Th-2-dominant response. When animals were primed with DNA and boost with protein, both antibodies and Th-cell proliferative response were significantly enhanced. Moreover, production of Th-1-type cytokine (IFN-gamma) was increased significantly by DNA priming-protein boosting. This protocol also resulted in an increased relative ratio of IgG(2a) to IgG(1) and the cytotoxicity of T cells. Thus, this study demonstrated that the formation of ESAT6 DNA prime-protein boost inoculation could improved antigen-specific cellular immune responses, which are important for protection against TB infection. (C) 2004 Elsevier Ltd. All rights reserved.
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