title: Whole-cell Bordetella pertussis vaccine component modulates the mouse immune response to an unrelated soluble antigen.
abstract: Several factors are involved in the selective activation of Th1 or Th2 cells, such as different physical characteristics of antigens and the type of antigen-presenting cells involved in the immune response, among others. To study the influence of a particulate antigen on Th1/Th2 cell differentiation during the immune response to another antigen, we analysed the immune response to tetanus toxoid (soluble antigen) in BALB/c mice immunized with one of the three following vaccines: tetanus and diphtheria toxoids (DT), or DT associated with whole-cell Bordetella pertussis or its soluble antigens (DTPw and DTPa, respectively). Similar total antibody levels were observed for all vaccines. DT vaccine showed a higher IgG1/IgG2a ratio than the similar values observed for DTPw and DTPa vaccines. DT- and DTPa-primed spleen cells showed a Th2 (IL-5) profile while a Th1/Th2 (IFN gamma, IL-5) profile was observed for DTPw. IL-6 was only produced by DTPw-primed cells. Besides, IL-12 levels induced by DTPw were three times higher than the ones induced by both DT and DTPa. Our findings indicate that whole-cell B. pertussis priming modifies the tetanus immune response from Th2 to Th1/Th2 type probably via inflammatory mechanisms. In addition, in the light of conflicting reports regarding the mechanisms of protection induced by DTP vaccines, we studied the pertussis immune response. Only DTPw immunization generated memory T cells capable of proliferating with B. pertussis as an in vitro stimulus. Results might indicate that these cells may not play a key role in protecting against B. pertussis when the host is vaccinated with DTPa.
authors.affiliation: Instituto de Estudios de la Inmunidad Humoral, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, (1113) Buenos Aires, Argentina
authors.forename: María Victoria
authors.initials: MV
authors.lastname: Lavigne
authors.forename: Marisa
authors.initials: M
authors.lastname: Castro
authors.forename: Nancy
authors.initials: N
authors.lastname: Mateo
authors.forename: Silvana
authors.initials: S
authors.lastname: Deluchi
authors.forename: Carlos
authors.initials: C
authors.lastname: Atzori
authors.forename: Luciana
authors.initials: L
authors.lastname: Piudo
authors.forename: María
authors.initials: M
authors.lastname: Calcagno
authors.forename: María Luisa
authors.initials: ML
authors.lastname: Brero
authors.forename: Marcela
authors.initials: M
authors.lastname: Manghi
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000276:immunology; D000942:Antigens, Bacterial / Q000276:immunology; D001886:Bordetella pertussis / Q000276:immunology*; D003429:Cross Reactions / Q000276:immunology*; D016207:Cytokines / Q000032:analysis / Q000276:immunology; D022422:Diphtheria-Tetanus Vaccine / Q000276:immunology*; D015721:Diphtheria-Tetanus-Pertussis Vaccine / Q000276:immunology*; D022681:Diphtheria-Tetanus-acellular Pertussis Vaccines / Q000276:immunology*; D005260:Female; D051379:Mice; D008807:Mice, Inbred BALB C; D012995:Solubility; D013745:Tetanus Toxoid / Q000276:immunology*; D018417:Th1 Cells / Q000276:immunology; D018418:Th2 Cells / Q000276:immunology; D014611:Vaccination; D014917:Whooping Cough / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D016207:Cytokines; D022422:Diphtheria-Tetanus Vaccine; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D022681:Diphtheria-Tetanus-acellular Pertussis Vaccines; D013745:Tetanus Toxoid