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Probiotic, as well as conventional yogurt, can enhance the stimulated production of proinflammatory cytokines

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Abstract:

Abstract Background 

Lactic acid bacteria have been shown to stimulate the secretion of cytokines by lymphocytes and monocytes in a strain-dependent manner. Therefore, in this study, the effect of a daily intake of probiotic yogurt on cytokine production in young healthy women was compared with that of a conventional product. Methods 

For 2 weeks each, subjects consumed 100 g, then 200 g of either a probiotic or a conventional, commercially available yogurt, both containing Lactobacillus bulgaricus and Streptococcus thermophilus with additional Lactobacillus casei DN 114 001 in the probiotic product. Cytokine production in blood culture following stimulation with phytohaemmaglutinin and lipopolysaccharide was measured using Cytometric Bead Array and enzyme-linked immunosorbent assay. Results 

Stimulated production of tumour necrosis factor-α increased significantly following consumption of conventional or probiotic yogurt (+63% and +24% compared with baseline, respectively, P < 0.001). There was also a significantly higher production of interleukin (IL)-1β in the conventional (+40%, P = 0.006) and of interferon gamma in the probiotic group (+108%, P < 0.05). IL-10 decreased following consumption of the probiotic product, but increased significantly after intake cessation (+129%, P < 0.001). No significant differences in cytokine responses between the conventional and the probiotic yogurt were observed. Conclusion 

Both conventional and probiotic yogurt enhanced the stimulated production of pro-inflammatory cytokines.

Keywords: cytokines; immunity; probiotic; yogurt

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1365-277X.2007.00807.x

Affiliations: 1: Department of Nutritional Sciences, University of Vienna, Vienna, Austria 2: Institute for Cancer Research, University Clinic for Internal Medicine I, Medical University of Vienna, Vienna, Austria

Publication date: 2007-12-01

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