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Use of Single Chain MHC Technology to Investigate Co-agonism in Human CD8+ T Cell Activation
Published on: February 28, 2019
Recombinant heat shock protein 65 carrying PADRE and HBV epitopes activates dendritic cells and elicits HBV-specific
Hua Wang1, Xuejin Su, Peiyin Zhang
1Department of Molecular Biology, Norman Bethune Medical College, Jilin University, Changchun 130021, PR China.
Abstract:
BCG Hsp65 and PADRE have been shown to be potent to enhance antigen specific immunity. In order to explore the possibility to utilize them for the development of HBV therapeutic vaccine, a chimeric protein, Hsp65-HBV, was created by fusing PADRE and epitopes from HBV to the carboxyl-terminus of BCG Hsp65 and expressed in E. coli. We evaluated its effects on human dendritic cell maturation and specific CTL induction in vitro. Results showed that Hsp65-HBV could activate human dendritic cells by up-regulating the expressions of HLA-A2, HLA-DR and CD86, companioning with high level of IL-12 secretion. Furthermore, Hsp65-HBV matured DCs could significantly stimulate human autologous CD8(+) T cell proliferation and induce HBV-specific CTLs. Hsp65-HBV was also shown to generate HBsAg-specific CTLs in vivo in mice. These results indicated that Hsp65-HBV might be a candidate for the treatment of chronic HBV infection.
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