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Effect of bacterial, urine and substratum surface tension properties on bacterial adhesion to biomaterials
Authors
S. Hekmat
P. V. Kirjavainen
M. Lorea Baroja
G. Reid
Publication date
1 September 2007
Publisher
Scholarship@Western
Abstract
Our aim was to assess anti-inflammatory effects on the peripheral blood of subjects with inflammatory bowel disease (IBD) who consumed probiotic yogurt for 1 month. We studied 20 healthy controls and 20 subjects with IBD, 15 of whom had Crohn\u27s disease and five with ulcerative colitis. All the subjects consumed Lactobacillus rhamnosus GR-1 and L. reuteri RC-14 supplemented yogurt for 30 days. The presence of putative regulatory T (T ) cells (CD4 CD25 ) and cytokines in T cells, monocytes and dendritic cells (DC) was determined by flow cytometry from peripheral blood before and after treatment, with or without ex vivo stimulation. Serum and faecal cytokine concentrations were determined by enzyme-linked immunosorbent assays. The proportion of CD4 CD25 T cells increased significantly (P = 0.007) in IBD patients, mean (95% confidence interval: CI) 0.84% (95% CI 0.55-1.12) before and 1.25% (95% CI 0.97-1.54) after treatment, but non-significantly in controls. The basal proportion of tumour necrosis factor (TNF)-α /interleukin (IL)-12 monocytes and myeloid DC decreased in both subject groups, but of stimulated cells only in IBD patients. Also serum IL-12 concentrations and proportions of IL-2 and CD69 T cells from stimulated cells decreased in IBD patients. The increase in CD4 CD25 T cells correlated with the decrease in the percentage of TNF-α- or IL-12-producing monocytes and DC. The effect of the probiotic yogurt was confirmed by a follow-up study in which subjects consumed the yogurt without the probiotic organisms. Probiotic yogurt intake was associated with significant anti-inflammatory effects that paralleled the expansion of peripheral pool of putative T cells in IBD patients and with few effects in controls. © 2007 British Society for Immunology. reg reg + high + high + + + + + hig
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Last time updated on 12/04/2021