4.7 Article

Identification and Selection of Prospective Probiotics for Enhancing Gastrointestinal Digestion: Application in Pharmaceutical Preparations and Dietary Supplements

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NUTRIENTS
卷 15, 期 6, 页码 -

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MDPI
DOI: 10.3390/nu15061306

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lactic acid bacteria; digestibility; food functionality; anti-nutritional compounds; scoring approach

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Our study investigated the effectiveness of 446 strains of lactic acid bacteria (LAB) from different sources as potential probiotic candidates for enhancing gastrointestinal digestion. Only 44 high-resistant strains were selected for further food digestibility investigations. After in vitro digestion, fermented matrices by these strains showed additional functional properties by releasing peptides and increasing the release of highly bio-accessible free phenolic compounds.
Our study investigated the effectiveness of 446 strains of lactic acid bacteria (LAB) belonging to different species and isolated from diverse sources (food, human, and animal) as potential probiotic candidates, with the perspective of producing dietary supplements or pharmacological formulations suitable for enhancing gastrointestinal digestion. The survival capability of all the isolates under harsh gastrointestinal tract conditions was evaluated, in which only 44 strains, named high-resistant, were selected for further food digestibility investigations. All 44 strains hydrolyzed raffinose and exhibited amino and iminopeptidase activities but at various extents, confirming species- and strain-specificity. After partial in vitro digestion mimicking oral and gastric digestive phases, food matrices were incubated with single strains for 24 h. Fermented partially digested matrices provided additional functional properties for some investigated strains by releasing peptides and increasing the release of highly bio-accessible free phenolic compounds. A scoring procedure was proposed as an effective tool to reduce data complexity and quantitively characterize the probiotic potential of each LAB strain, which could be more useful in the selection procedure of powerful probiotics.

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