Abstract
Alzheimer's disease (AD) is a neurodegenerative disease that remarkably imposes a huge global public health burden. Yeast β-glucans have been incorporated in functional foods and used in prophylactic applications owing to their biological effects. However, few studies had investigated the effects of yeast β-glucans on neurodegenerative diseases. Here, gut microbiota and metabolites SCFAs were analyzed through high-throughput 16S rRNA gene sequencing and GC-MS, respectively. Results indicated that yeast β-glucans could prominently shape the intestinal flora and produce SCFAs. Aβ1-42-induced AD mice treated with small-molecular yeast β-glucan (S-β-Glu) or macro-molecular yeast β-glucan (M-β-Glu) exhibited evident alterations of the composition of the gut microbiota, especially in some beneficial bacteria and inflammatory-related bacteria such as Lactobacillus, Bifidobacterium, Desulfovibrio, Oscillibacter, Mucispirillum, Alistipes, Anaerotruncus, and Rikenella. M-β-Glu regulated gut microbiota act as prebiotics better than S-β-Glu. Correlation analysis demonstrated the key microbiota closely associated with AD-related pathologies and cognition. Moreover, M-β-Glu and S-β-Glu ameliorated neuroinflammation and brain insulin resistan...Continue Reading
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