beta-Glucan oligosaccharide enhances CD8(+) T cells immune response induced by a DNA vaccine encoding hepatitis B virus core antigen.

Journal of Biomedicine & Biotechnology
Jing WangDi Qu

Abstract

DNA vaccination can induce specific CD8(+) T cell immune response, but the response level is low in large mammals and human beings. Coadministration of an adjuvant can optimize protective immunity elicited by a DNA vaccine. In this study, we investigated the effect of a synthetic glucohexaose (beta-glu6), an analogue of Lentinan basic unit, on specific CD8(+) T cell response induced by a DNA vaccine encoding HBcAg (pB144) in mice. We found that beta-glu6 promoted the recruitment and maturation of dendritic cells, enhanced the activation of CD8(+) and CD4(+) T cells and increased the number of specific CD8(+)/IFN-gamma(+) T cells in lymphoid and nonlymphoid tissues in mice immunized by pB144. Immunization with pB144 and beta-glu6 increased the anti-HBc IgG and IgG2a antibody titer. These results demonstrate that beta-glu6 can enhance the virus-specific CTL and Th1 responses induced by DNA vaccine, suggesting beta-glu6 as a candidate adjuvant in DNA vaccination.

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Methods Mentioned

BETA
ELISA
density gradient centrifugation
flow cytometry
FACS

Software Mentioned

CellQuest
SPSS

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