title: Evaluation of the immune response to Anaplasma marginale MSP5 protein using a HSV-1 amplicon vector system or recombinant protein.
abstract: Anaplasma marginale is an intraerythrocytic vector-borne infectious agent of cattle. Immunization with the current vaccine, based on parasitized erythrocytes with live Anaplasma centrale, shows some constraints and confers partial protection, suggesting the feasibility for the development of new generation of vaccines. The aim of the present study was to assess the effect of sequential immunization of BALB/c mice, with herpesvirus amplicon vector-based vaccines combined with protein-based vaccines, on the quality of the immune response against the major surface protein 5 of A. marginale. The highest antibody titers against MSP5 were elicited in mice that received two doses of adjuvanted recombinant protein (p < 0.0001). Mice treated with a heterologous prime-boost strategy generated sustained antibody titers at least up to 200 days, and a higher specific cellular response. The results presented here showed that sequential immunization with HSV-based vectors and purified antigen enhances the quality of the immune response against A. marginale.
authors.affiliation: Centro de Virología Animal, Instituto de Ciencia y Tecnología Dr. Cesar Milstein, CONICET, Saladillo 2468, C1440FFX, Ciudad de Buenos Aires, Argentina.
authors.forename: Carlos
authors.initials: C
authors.lastname: Palacios
authors.affiliation: Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, CP 2300, Rafaela, Santa Fe, Argentina.
authors.forename: Susana
authors.initials: S
authors.lastname: Torioni de Echaide
authors.affiliation: Centro de Virología Animal, Instituto de Ciencia y Tecnología Dr. Cesar Milstein, CONICET, Saladillo 2468, C1440FFX, Ciudad de Buenos Aires, Argentina. Electronic address: nmattioncevan@centromilstein.org.ar.
authors.forename: Nora
authors.initials: N
authors.lastname: Mattion
mesh_terms: D042322:Anaplasma marginale / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D000712:Anaplasmosis / Q000517:prevention & control; D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D001428:Bacterial Vaccines / Q000276:immunology* / Q000821:virology; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control; D045744:Cell Line, Tumor; D002522:Chlorocebus aethiops; D005822:Genetic Vectors / Q000235:genetics; D018259:Herpesvirus 1, Human / Q000235:genetics; D007113:Immunity, Innate; D051379:Mice; D008807:Mice, Inbred BALB C; D011994:Recombinant Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D014709:Vero Cells
chemical_list: D001425:Bacterial Outer Membrane Proteins; D001428:Bacterial Vaccines; D011994:Recombinant Proteins; C111578:major surface protein 5, Anaplasma
keywords: Anaplasma marginale; Herpesvirus amplicon vectors; MSP5; Prime-boost vaccination