Open AccessOrogastric vaccination of guinea pigs with Helicobacter pylori sonicate and a high dose of cholera toxin lowers the burden of infection
Author(s) -
Durrani Zarmina,
Rijpkema Sjoerd
Publication year - 2003
Publication title -
fems immunology & medical microbiology
Language(s) - English
Resource type - Journals
eISSN - 1574-695X
pISSN - 0928-8244
DOI - 10.1016/s0928-8244(03)00027-0
Subject(s) - helicobacter pylori , cholera toxin , vaccination , immunology , immune system , antibody , cholera , biology , spirillaceae , stomach , gastritis , toxin , microbiology and biotechnology , biochemistry , genetics
Guinea pigs were vaccinated orogastrically with Helicobacter pylori cell sonicate (CS) and 10 μg or 100 μg cholera toxin (CT) or CT only. Naı¨ve animals were used as a control. In both experiments, vaccination primed the local IgG and IgA response, irrespective of the CT dose. After challenge, only the group of animals immunised with CS and 100 μg CT had a significantly lower number of H. pylori in the antral region of the stomach, but vaccination did not prevent H. pylori infection. This protective effect was not associated with a switch in IgG subclass, which remained predominantly IgG2. The levels of specific antibodies in serum and the gastric mucosa which were similar to naive unprotected animals. In conclusion, the ability of mucosal adjuvants such as CT to induce a protective immune response may be host dependent and findings in the Helicobacter ‐mouse model should be interpreted with caution.