In vitro digestibility and prebiotic activities of a sulfated polysaccharide from Gracilaria Lemaneiformis

By Rui Han, Daorui Pang, Lingrong Wen, Lijun You, Riming Huang, V. Kulikouskaya. 2020

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Abstract The study explored the changes of a sulfated polysaccharide (SP) from Gracilaria Lemaneiformis during simulated human digestive system. The results showed SP was scarcely degraded without significant difference. Moreover, the results of fermentation in vitro indicated 53.7% of SP were utilized by gut microbiota with the molecular weight decreasing by 59.41% at 48 h. Meanwhile, 50.07 ± 2.82 mM of short chain fatty acids were produced in culture medium. Besides, in contrast with the regulation of galacto-oligosaccharide sacrificing diversity and richness of community, SP could regulate the composition of microbiota in a mild way. What’s more, Proteobacteria and Firmicutes were the most sensitive phyla responding to changes of pH values in this study. And Sutterella, Phascolarctobacterium, Parabacteroides, Lachnospiraceae_UCG-004, Desulfovibrio and Bacteroides were dominant genera for degrading and utilizing SP. Furthermore, the metagenomic function characteristics of microbes might be changed by SP. Thus, SP could be a potential prebiotic.

Subfields: Food Science, Molecular Biology, Nutrition and Dietetics

View Paper: https://www.semanticscholar.org/paper/4692adbebcd044baed58db82ecba0ee20cb43435