Cross-feeding between bifidobacteria and butyrate-producing colon bacteria explains bifdobacterial competitiveness, butyrate production, and gas production.

摘要: Inulin-type fructans are not digested and reach the human colon intact, where they selectively fermented by microbiota, in particular bifidobacteria. As a result, converted, directly or indirectly, to short-chain fatty acids other organic acids, as well gases, lead both bifidogenic butyrogenic health-promoting effects. Bifidobacteria display phenotypic variation on strain level their capacity degrade inulin-type fructans. Also, different chain lengths of may stimulate subgroups within bifidobacterial population. The end-metabolites fructan degradation bifidobacteria reflect growth rates these polymers. Other bacteria also able fructans, is case for lactobacilli, Bacteroides, certain enterobacteria, butyrate producers. Bacterial cross-feeding mechanisms lay at basis overall production, functional characteristic several that always accompanied gas production. Finally, specificity polysaccharide use microbiota determine diet-induced alterations consequent metabolic