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- W2079168295 abstract "Chronic hepatitis C virus (HCV) infection cases resistant to conventional therapies might be treated by immunotherapy as cytotoxic T lymphocytes (CTL) are the main mechanism through which viral infections are cleared. The HCV core gene, with the highest homology between HCV types, deleted of its autoimmune-stimulating regions (pseudo-GOR and pseudo-p450), may be an appropriate antigen for targeting HCV-infected cells. Two recombinant adeno-associated virus (rAAV) vectors, carrying either the full length (aa 1–190) or truncated (aa 49–180, deleted of the pseudo-GOR and pseudo-p450 sequences) versions of core, were generated. Both AAV/core (l–190) and AAV/core (49–180) were used to transduce/load dendritic cells (DC) at high levels (88–95%). These two genetically altered DC types then stimulated anti-core CTL. The DC and CTL were analyzed by FACS and for killing efficiency (percent target killing). The rAAV-altered DC displayed higher levels of CD80, CD83, CD86, and CD 1a than control DC. The truncated core (aa 49–180) gene stimulated equivalent and strong killing of synthetic core-positive autologous peripheral blood lymphocyte (PBL) targets to that stimulated by the full length core gene. However, the smaller core (49–180) antigen gene stimulated lower levels of killing of core-negative “self” PBL targets (GOR- and p450-positive) (p = 0.002). These AAV/core: DC-stimulated CTL displayed higher IFN-γ expression, higher CD8:CD4 ratios, and lower CD56:CD8 ratios than controls. The rAAV-loading derived CD8+ T cells had more CD69+ cells and the CD4+ T populations had fewer CD25+ cells than controls. We conclude that the core (49–180) gene is an effect antigen, but has the advantage of stimulating less self-recognition. Thus, core (49–180) may be useful for further translational immunotherapy studies against HCV." @default.
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- W2079168295 date "2006-03-06" @default.
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- W2079168295 title "An autoimmune domain-reduced HCV core gene remains effective in stimulating anti-core cytotoxic T lymphocyte activity" @default.
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- W2079168295 doi "https://doi.org/10.1016/j.vaccine.2005.09.055" @default.
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