title: Anti-cancer activity of plant-produced HPV16 E7 vaccine.
abstract: The E7 oncoprotein from Human Papilloma Virus (HPV) is an attractive candidate for anti-cancer vaccine development. In this study, we engineered HPV16 E7 coding sequence (wild type or mutagenized sequence, E7GGG) as fusions to beta-1,3-1,4-glucanase (LicKM) of Clostridium thermocellum and produced in Nicotiana benthamiana plants using a transient expression system. Target antigens were purified and evaluated in mice for their potential as prophylactic and therapeutic vaccine candidates. Both fusion proteins induced E7-specific IgG and cytotoxic T-cell responses and protected mice against challenge with E7-expressing tumor cells. Furthermore, when administered after challenge, these plant-produced antigens prevented tumor development.
authors.affiliation: ENEA, Italian National Agency for New Technologies, Energy and the Environment, BAS BIOTEC GEN, C.R. Casaccia, Via Anguillarese 301, 00123 Rome, Italy.
authors.forename: Silvia
authors.initials: S
authors.lastname: Massa
authors.forename: Rosella
authors.initials: R
authors.lastname: Franconi
authors.forename: Rossella
authors.initials: R
authors.lastname: Brandi
authors.forename: Antonio
authors.initials: A
authors.lastname: Muller
authors.forename: Vadim
authors.initials: V
authors.lastname: Mett
authors.forename: Vidadi
authors.initials: V
authors.lastname: Yusibov
authors.forename: Aldo
authors.initials: A
authors.lastname: Venuti
mesh_terms: D000818:Animals; D019496:Cancer Vaccines / Q000008:administration & dosage* / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D009374:Neoplasms, Experimental / Q000517:prevention & control*; D009856:Oncogene Proteins, Viral / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D027383:Papillomaviridae / Q000235:genetics / Q000276:immunology*; D050725:Papillomavirus E7 Proteins; D011993:Recombinant Fusion Proteins / Q000276:immunology / Q000378:metabolism; D014026:Nicotiana / Q000737:chemistry / Q000378:metabolism*; D014765:Viral Vaccines / Q000008:administration & dosage* / Q000276:immunology
chemical_list: D019496:Cancer Vaccines; D009856:Oncogene Proteins, Viral; D050725:Papillomavirus E7 Proteins; D011993:Recombinant Fusion Proteins; D014765:Viral Vaccines; C059731:oncogene protein E7, Human papillomavirus type 16