title: Immunity conferred by an experimental vaccine based on the recombinant PCV2 Cap protein expressed in Trichoplusia ni-larvae.
abstract: Porcine circovirus type 2 (PCV2) vaccination has been recently included as a measure to control postweaning multisystemic wasting syndrome (PMWS) in the field. Aiming to obtain a more affordable vaccine to be extensively implemented in the field, a highly efficient non-fermentative expression platform based on Trichoplusia ni (T. ni) larvae was used to produce a baculovirus-derived recombinant PCV2 Cap protein (rCap) for vaccine purposes. Vaccination of pigs with rCap induced solid protection against PCV2 experimental infection, inhibiting both the viremia and the viral shedding very efficiently. The protection afforded by the rCap vaccine strongly correlated with the induction of specific humoral immune responses, even in the presence of PCV2-specific maternal immunity, although cellular responses also seemed to play a partial role. In summary, we have shown that rCap expressed in T. ni larvae could be a cost-effective PCV2 vaccine candidate to be tested under field conditions.
authors.affiliation: Centre de Recerca en Sanitat Animal, UAB-IRTA, Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
authors.forename: Eva
authors.initials: E
authors.lastname: Pérez-Martín
authors.forename: Silvia
authors.initials: S
authors.lastname: Gómez-Sebastián
authors.forename: Jordi M
authors.initials: JM
authors.lastname: Argilaguet
authors.forename: Marina
authors.initials: M
authors.lastname: Sibila
authors.forename: María
authors.initials: M
authors.lastname: Fort
authors.forename: Miquel
authors.initials: M
authors.lastname: Nofrarías
authors.forename: Sherry
authors.initials: S
authors.lastname: Kurtz
authors.forename: José M
authors.initials: JM
authors.lastname: Escribano
authors.forename: Joaquim
authors.initials: J
authors.lastname: Segalés
authors.forename: Fernando
authors.initials: F
authors.lastname: Rodríguez
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D016367:Baculoviridae / Q000235:genetics; D017925:Circovirus / Q000276:immunology*; D005260:Female; D005822:Genetic Vectors; D007814:Larva; D007915:Lepidoptera; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D053570:Porcine Postweaning Multisystemic Wasting Syndrome / Q000517:prevention & control*; D013552:Swine; D022223:Vaccines, Subunit / Q000276:immunology; D014764:Viral Proteins / Q000276:immunology*; D014765:Viral Vaccines / Q000276:immunology*; D014766:Viremia / Q000517:prevention & control; D017201:Virus Shedding / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; D022223:Vaccines, Subunit; D014764:Viral Proteins; D014765:Viral Vaccines