title: Characterization of a Salmonella typhimurium aro vaccine strain expressing the P.69 antigen of Bordetella pertussis.
abstract: The P.69 Bordetella pertussis protective antigen was expressed by use of the trc promoter from the chromosome of a Salmonella typhimurium aro vaccine strain, BRD509, by integrating the prn gene, encoding the 93-kDa precursor of this protein, into the aroC locus. P.69 was detected on the cell surface of the S. typhimurium strain (BRD640) by agglutination and immunoelectron microscopy. BALB/c mice immunized orally or intravenously with BRD640 showed a significant level of protection against an aerosol challenge with virulent B. pertussis, compared with control animals. No anti-P.69 antibodies in the serum or anti-P.69 antibody-secreting cells in the lungs were detected in BRD640-vaccinated animals, although cells isolated from spleens showed a P.69-dependent cell proliferative response. In contrast, low levels of anti-P.69 antibodies in the serum and anti-P.69 antibody-secreting cells in the lungs were detected in immunized mice following a B. pertussis challenge.
authors.affiliation: Department of Cell Biology, Wellcome Research Laboratories, Langley Court, Beckenham, Kent, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: Strugnell
authors.forename: G
authors.initials: G
authors.lastname: Dougan
authors.forename: S
authors.initials: S
authors.lastname: Chatfield
authors.forename: I
authors.initials: I
authors.lastname: Charles
authors.forename: N
authors.initials: N
authors.lastname: Fairweather
authors.forename: J
authors.initials: J
authors.lastname: Tite
authors.forename: J L
authors.initials: JL
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Beesley
authors.forename: M
authors.initials: M
authors.lastname: Roberts
mesh_terms: D018829:Adhesins, Bacterial; D000284:Administration, Oral; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis; D000942:Antigens, Bacterial / Q000276:immunology*; D001886:Bordetella pertussis / Q000276:immunology*; D005260:Female; D006388:Hemagglutinins / Q000235:genetics / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D010567:Pertussis Vaccine / Q000276:immunology*; D012486:Salmonella typhimurium / Q000235:genetics / Q000276:immunology*; D014611:Vaccination; D010566:Virulence Factors, Bordetella / Q000096:biosynthesis / Q000276:immunology*
chemical_list: D018829:Adhesins, Bacterial; D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D006388:Hemagglutinins; D010567:Pertussis Vaccine; D010566:Virulence Factors, Bordetella; C065273:filamentous hemagglutinin adhesin, Bordetella pertussis