title: Evaluation of the protective immune response induced in mice by immunization with Schistosoma mansoni schistosomula tegument (Smteg) in association with CpG-ODN.
abstract: In schistosomiasis, the current control strategy does not prevent reinfection, therefore, vaccine strategies are essential to combat the Schistosoma mansoni. The efficacy vaccine depends on parasite stage and effective adjuvant. We have recently demonstrated that S. mansoni schistosomula tegument (Smteg) is able to activate dendritic cells up regulate CD40 and CD86 molecules and induce a partial protection in mice (43-48%) when formulated with Freund's adjuvant. In this study we evaluated the ability of Smteg + alum or Smteg + alum + CpG-ODN to induce protection in mice. Our results demonstrate that Smteg + alum + CpG-ODN induced a partial reduction in worm burden (43.1%), reduction in the number of eggs eliminated in the feces. The protective response was associated with a predominant Th1 type of immune response, with increased production of specific IgG2c, IFN-γ and TNF-α, B cells proliferation and CD4 cells and macrophages activation.
authors.affiliation: Centro de Pesquisas René Rachou, Fiocruz-MG, Belo Horizonte, Minas Gerais, Brazil.
authors.forename: Tatiane
authors.initials: T
authors.lastname: Teixeira de Melo
authors.forename: Juliano Michel
authors.initials: JM
authors.lastname: Araujo
authors.forename: Isabela
authors.initials: I
authors.lastname: Campos de Sena
authors.forename: Clarice
authors.initials: C
authors.lastname: Carvalho Alves
authors.forename: Neusa
authors.initials: N
authors.lastname: Araujo
authors.forename: Cristina
authors.initials: C
authors.lastname: Toscano Fonseca
mesh_terms: D000276:Adjuvants, Immunologic / Q000008:administration & dosage; D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood / Q000276:immunology*; D015703:Antigens, CD / Q000276:immunology; D016207:Cytokines / Q000276:immunology; D003593:Cytoplasm / Q000737:chemistry / Q000276:immunology / Q000378:metabolism; D005243:Feces / Q000469:parasitology; D005260:Female; D007114:Immunization; D008264:Macrophages / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D009838:Oligodeoxyribonucleotides / Q000008:administration & dosage / Q000276:immunology*; D010270:Parasite Egg Count; D012550:Schistosoma mansoni / Q000737:chemistry / Q000276:immunology*; D012555:Schistosomiasis mansoni / Q000276:immunology* / Q000517:prevention & control*; D014612:Vaccines / Q000008:administration & dosage / Q000276:immunology*
chemical_list: D000276:Adjuvants, Immunologic; D000909:Antibodies, Helminth; D015703:Antigens, CD; C408982:CPG-oligonucleotide; D016207:Cytokines; D009838:Oligodeoxyribonucleotides; D014612:Vaccines