A self-adjuvanting lipopeptide-based vaccine candidate for the treatment of hepatitis C virus infection
Date
2008
Authors
Chua, B.
Eriksson, E.
Brown, L.
Zeng, W.
Gowans, E.
Torresi, J.
Jackson, D.
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Journal article
Citation
Vaccine, 2008; 26(37):4866-4875
Statement of Responsibility
Brendon Y. Chua, Emily M. Eriksson, Lorena E. Brown,Weiguang Zeng, Eric J. Gowans, Joseph Torresi and David C. Jackson
Conference Name
Abstract
Effective CD8(+) T cell responses have been induced using totally synthetic self-adjuvanting lipopeptides containing the dipalmitoyl-S-glyceryl cysteine lipid moiety, which is a ligand for Toll-like receptor 2 (TLR2) on dendritic cells (DC). In this study, we evaluated the use of lipopeptide vaccine candidates containing HLA-A2-restricted epitopes for DC-based immunotherapy of HCV infection. Lipopeptides were able to induce specific CD8(+) T cell responses in HLA-A2 transgenic mice and consistently activated human monocyte-derived DC from both healthy individuals and HCV infected patients. Lipopeptide-pulsed human DC were also found to secrete the pro-inflammatory cytokine IL-12p70 and were able to activate antigen-specific IFN-gamma production by autologous CD8(+) T cells obtained from a hepatitis C patient. These results show that DC from HCV patients can be matured and antigen loaded with TLR2-targeting lipopeptides for effective presentation of CD8(+) T cell epitopes; the use of autologous lipopeptide-pulsed DC or direct lipopeptide vaccination may be successful approaches for the priming or boosting of anti-HCV CD8(+) T cell responses to aid in the clearance of the virus in chronically infected individuals.
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© 2008 Elsevier Ltd. All rights reserved.