alexa In vitro study of prebiotic properties of levan-type exopolysaccharides from Lactobacilli and non-digestible carbohydrates using denaturing gradient gel electrophoresis.

Author(s): Bello FD, Walter J, Hertel C, Hammes WP

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Abstract Batch cultures inoculated with human faeces were used to study the prebiotic properties of levan-type exopolysaccharides (EPS) from Lactobacillus sanfranciscensis as well as levan, inulin, and fructooligosaccharide (FOS). Denaturing gradient gel electrophoresis of 16S rDNA fragments generated by PCR with universal primers was used to analyse the cultures. Characteristic changes were revealed in the composition of the gut bacteria during fermentation of the carbohydrates. An enrichment of Bifidobacterium spp. was found for the EPS and inulin but not for levan and FOS. The bifidogenic effect of the EPS was confirmed by culturing on selective medium. In addition, the use of EPS and FOS resulted in enhanced growth of Eubacterium biforme and Clostridium perfringens, respectively. This article was published in Syst Appl Microbiol and referenced in

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