Journal of Microbiology

Research Support, Non-U.S. Gov't

Protection Against Helicobacter pylori Infection by a Trivalent Fusion Vaccine Based on a Fragment of Urease B-UreB414: Li Wang Wang , Xiao-Fei Liu , Shi Yun , Xiao-Peng Yuan , Xu-Hu Mao , Chao Wu , Wei-Jun Zhang , Kai-Yun Liu , Gang Guo , Dong-Shui Lu , Wen-De Tong , Ai-Dong Wen , Quan-Ming Zou; J. Microbiol. 2010;48(2):223-228. Published online May 1, 2010; DOI: https://doi.org/10.1007/s12275-009-0233-4

Abstract: A multivalent fusion vaccine is a promising option for protection against Helicobacter pylori infection. In this study, UreB414 was identified as an antigenic fragment of urease B subunit (UreB) and it induced an antibody inhibiting urease activity. Immunization with UreB414 partially protected mice from H. pylori infection. Furthermore, a trivalent fusion vaccine was constructed by genetically linking heat shock protein A (HspA), H. pylori adhesin A (HpaA), and UreB414, resulting in recombinant HspA-HpaA-UreB414 (rHHU). Its protective effect against H. pylori infection was tested in BALB/c mice. Oral administration of rHHU significantly protected mice from H. pylori infection, which was associated with H. pylori-specific antibody production and Th1/Th2-type immune responses. The results show that a trivalent fusion vaccine efficiently combats H. pylori infection, and that an antigenic fragment of the protein can be used instead of the whole protein to construct a multivalent vaccine.

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