Journal
IMMUNOBIOLOGY
Volume 209, Issue 9, Pages 681-687Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.imbio.2004.09.009
Keywords
calprotectin; probiotics; inflammatory bowel disease
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Calprotectin levels were measured by ELISA in plasma, terminal small bowel lavage and bronchoalveolar lavage from 8-day-old germ-free piglets or gnotobiotic piglets 24 h after colonization with one of the following Escherichia coli strains: non-pathogenic O86, probiotic Nissle 1917 or enteropathogenic O55. The concentration of calprotectin in plasma was about 30 ng/ml only in germ-free piglets and piglets associated with non-pathogenic E. coli. Piglets infected with 055 showed a significant increase of plasma calprotectin and the highest mean level of calprotectin in the bronchoalveolar lavage, which was coincident with septicaemia. However, in the lumen of the small intestine, E. coli Nissle 1917 alone elicited a significant increase of the calprotectin level which was confirmed by immunofluorescence and APAAP immunohistochemistry on cryostat sections through the small bowel. The relevance of this finding to the therapeutic effect of E. coli Nissle 1917 in inflammatory bowel disease is discussed. (c) 2005 Elsevier GmbH. All rights reserved.
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