Journal
VACCINE
Volume 26, Issue 37, Pages 4866-4875Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2008.03.032
Keywords
dendritic cell; immunotherapy; Toll-like receptor 2; transgenic mice; CD8(+) T cells
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Funding
- NIAID NIH HHS [R01 AI054459] Funding Source: Medline
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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. (C) 2008 Elsevier Ltd. All rights reserved.
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