Fiber consumption stimulates the activity of microbial bile salt hydrolases

Autor: András Gregor, Sandra Auernigg-Haselmaier, Manuel Malleier, Stefan Bruckberger, Joana Séneca, Petra Pjevac, Marc Pignitter, Kalina Duszka
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Functional Foods, Vol 107, Iss , Pp 105707- (2023)
Druh dokumentu: article
ISSN: 1756-4646
DOI: 10.1016/j.jff.2023.105707
Popis: Previously we reported a microbiota-dependent caloric restriction (CR)-triggered increase in the levels of taurine and taurine-conjugated bile acids (BA) in the gut. Now, we show that restrictive diets, including intermittent fasting and fasting-mimicking diet, had a similar impact to CR. The type of cage bedding that CR mice were housed with affected the levels of BAs and taurine in the ileum. Removal of cage bedding neutralized CR phenotype in terms of taurine levels, BAs deconjugation, and fecal microbiota composition. Microbiota transplant from CR mice housed with bedding increased BAs deconjugation. Inhibition of bile salt hydrolase (BSH) prevented the increase in free taurine concentration while increasing taurine-conjugated BA levels. Ad libitum consumption of diets high in fiber increased the levels of taurine conjugates but did not elevate the levels of BAs. Dietary restriction is required to stimulate BAs secretion, while ingestion of fiber stimulates the capacity of microbiota to deconjugate BAs.
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