%0 Journal Article %A Vajdy, Michael %A Selby, Mark %A Medina-Selby, Angelica %A Coit, Doris %A Hall, John %A Tandeske, Laura %A Chien, David %A Hu, Celine %A Rosa, Domenico %A Singh, Manmohan %A Kazzaz, Jina %A Nguyen, Steve %A Coates, Steve %A Ng, Philip %A Abrignani, Sergio %A Lin, Yin-Ling %A Houghton, Michael %A O'Hagan, Derek T. %T Hepatitis C virus polyprotein vaccine formulations capable of inducing broad antibody and cellular immune responses %D 2006 %J Journal of General Virology, %V 87 %N 8 %P 2253-2262 %@ 1465-2099 %R https://doi.org/10.1099/vir.0.81849-0 %I Microbiology Society, %X Although approximately 3 % of the world's population is infected with Hepatitis C virus (HCV), there is no prophylactic vaccine available. This study reports the design, cloning and purification of a single polyprotein comprising the HCV core protein and non-structural proteins NS3, NS4a, NS4b, NS5a and NS5b. The immunogenicity of this polyprotein, which was formulated in alum, oil-in-water emulsion MF59 or poly(dl-lactide co-glycolide) in the presence or absence of CpG adjuvant, was then determined in a murine model for induction of B- and T-cell responses. The addition of adjuvants or a delivery system to the HCV polyprotein enhanced serum antibody and T-cell proliferative responses, as well as IFN-γ responses, by CD4+ T cells. The antibody responses were mainly against the NS3 and NS5 components of the polyprotein and relatively poor responses were elicited against NS4 and the core components. IFN-γ responses, however, were induced against all of the individual components of the polyprotein. These data suggest that the HCV polyprotein delivered with adjuvants induces broad B- and T-cell responses and could be a vaccine candidate against HCV. %U https://www.microbiologyresearch.org/content/journal/jgv/10.1099/vir.0.81849-0