alexa Saccharomyces boulardii enhances rat intestinal enzyme expression by endoluminal release of polyamines.
Food & Nutrition

Food & Nutrition

Journal of Probiotics & Health

Author(s): Buts JP, De Keyser N, De Raedemaeker L

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Abstract Saccharomyces boulardii is a yeast widely used in humans for the prevention and treatment of infectious enteritis and Clostridium difficile-associated enterocolopathies. After oral administration to human volunteers or growing rats, S. boulardii enhances markedly the expression of intestinal enzymes as well as the production of the polymeric immunoglobulin receptor by mechanisms that remain unknown. We have analyzed the role of the yeast polyamines as potential mediators in the intestinal trophic response. In weanling rats (d 20 to d 30), a daily dose of 100 mg of lyophilized S. boulardii produced significant (p < 0.025) increases in sucrase (157\%) and maltase (47\%) activities. This dose corresponded to a total oral load of 678 nmol of polyamines per day (spermidine; 376 +/- 32, spermine: 293 +/- 26, putrescine: 9.5 +/- 1.4 nmol/100 mg). Spermine, given orally to growing rats at doses nearly equivalent (500 nmol) to the load of polyamines provided by the yeast (678 nmol), reproduced similar enzymatic changes, including a 2.5-fold induction of sucrase, and enhanced maltase activity (+24\%). Spermidine and spermine concentrations measured in the jejunal mucosa of treated rats were increased over matched controls by 21.4\% (p < 0.005) and 21.9\%, respectively (p < 0.002). After being centrifuged and filtered to discard residual yeast cells, 2-mL samples of jejunal and ileal fluid collected from S. boulardii-treated rats by intestinal flushing contained higher levels of spermidine (48 and 60\%) and spermine (150 and 316\%) than did control rats. Our data indicate that lyophilized S. boulardii exerts trophic effects on the small intestine that are likely mediated by the endoluminal release of spermine and spermidine. This article was published in Pediatr Res and referenced in Journal of Probiotics & Health

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