Journal
VACCINE
Volume 24, Issue 20, Pages 4285-4289Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2006.02.054
Keywords
gnotobiotic pig; aroA; cytokine; inflammation; vaccine; Salmonella
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Cytokine and inflammatory response against virulent LT2 strain and its attenuated aroA deletion mutant of Salmonella enterica serovar Typhimurium were compared in gnotobiotic pigs. Contrary to the parental strain, the auxotrofic mutant did not induce IL-1 beta, IL-18, TNF-alpha, and IFN-gamma in the ileum and plasma 24 h after the infection, did not cause pathological changes in ileal epithelium and mesenteric lymph nodes or immumoreactivity of gp91 phox and peroxynitrite and was not immunostained for GroEL stress protein. The absence of induction of proinflammatory cytokines may be a reason why aroA mutant was unable to elicit any inflammatory response and protect pigs against challenge with virulent LT2 strain administered 24 h later. (c) 2006 Elsevier Ltd. All rights reserved.
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