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Genetically engineered Bifidobacterium animalis expressing the Salmonella flagellin gene for the mucosal immunization in a mouse model
Author(s) -
Takata Tetsuo,
Shirakawa Toshiro,
Kawasaki Yoshiko,
Kinoshita Shohiro,
Gotoh Akinobu,
Kano Yasunobu,
Kawabata Masato
Publication year - 2006
Publication title -
the journal of gene medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.689
H-Index - 91
eISSN - 1521-2254
pISSN - 1099-498X
DOI - 10.1002/jgm.963
Subject(s) - flagellin , microbiology and biotechnology , bifidobacterium animalis , salmonella , recombinant dna , biology , immunology , virology , gene , bifidobacterium , bacteria , lactobacillus , biochemistry , genetics
Background A critical component of the host defense against enteric infections is the immunological response of the mucosal membrane, a major starting point of infectious disease, such as typhoid fever. The mucosal immune system consists of an integrated network of lymphoid tissues, mucous membrane‐associated cells, and effector molecules. In the present study, we developed a recombinant Bifidobacterium animalis ( B. animalis ) genetically modified with the Salmonella flagellin gene for mucosal immunization as an oral typhoid vaccine. Methods We constructed an oral vaccine against Salmonella typhimurium , consisting of recombinant B. animalis containing the flagellin gene of Salmonella. The recombinant B. animalis was administered orally to mice every other day for 6 weeks. Anti‐flagellin antibodies in the serum and stools were measured by enzyme‐linked immunosorbent assay (ELISA). Results We detected significantly higher levels of flagellin‐specific IgA in the serum and stools of the mice treated with the recombinant B. animalis containing the flagellin gene than was seen in those treated with parental B. animalis . Conclusions Our findings suggest that an oral vaccination using recombinant B. animalis genetically modified with the flagellin gene of Salmonella may be effective against Salmonella infections. Copyright © 2006 John Wiley & Sons, Ltd.