Differences in immunogenicity and protection in mice and guinea pigs following intranasal immunization with Helicobacter pylori outer membrane antigens.
Mice and guinea pigs were intranasally immunized with either recombinant lipoprotein 20 or Helicobacter pylori outer membrane vesicles (OMV). Cholera toxin was used as mucosal adjuvant. In mice, both vaccines elicited systemic and local IgG responses, which correlated with significantly lower levels of H. pylori colonization. In contrast, only OMV proved immunogenic in guinea pigs, with the development of both systemic and local immune responses. These antibodies did not, however, correlate with protection in these animals, which suggests that vaccine formulation is as important as choice of antigen in the development of an H. pylori vaccine.
Department of Surgery, Christchurch School of Medicine and Health Sciences, P.O. Box 4345, Christchurch, New Zealand. jacqui.keenan@chmeds.ac.nz
Jacqueline I
JI
Keenan
Sjoerd G
SG
Rijpkema
Zarmina
Z
Durrani
Justin A
JA
Roake
D000276:Adjuvants, Immunologic; D000281:Administration, Intranasal; D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood*; D000942:Antigens, Bacterial / Q000008:administration & dosage* / Q000235:genetics / Q000276:immunology; D001425:Bacterial Outer Membrane Proteins / Q000008:administration & dosage* / Q000276:immunology; D001428:Bacterial Vaccines / Q000008:administration & dosage* / Q000276:immunology; D002772:Cholera Toxin / Q000008:administration & dosage / Q000276:immunology; D004195:Disease Models, Animal; D006168:Guinea Pigs; D016481:Helicobacter Infections / Q000276:immunology* / Q000517:prevention & control*; D016480:Helicobacter pylori / Q000254:growth & development / Q000276:immunology* / Q000472:pathogenicity; D006801:Humans; D018928:Immunity, Mucosal; D008074:Lipoproteins / Q000235:genetics / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D011994:Recombinant Proteins / Q000276:immunology; D014611:Vaccination
D000276:Adjuvants, Immunologic; D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins; D001428:Bacterial Vaccines; D008074:Lipoproteins; C089630:Lpp20 protein, Helicobacter pylori; D011994:Recombinant Proteins; D002772:Cholera Toxin