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Alters Gut Microbiota and Metabolites Composition to Improve High Starch Metabolism in

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Journal Animals (Basel)
Date 2025 Feb 26
PMID 40003065
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Abstract

The aim of this study was to explore the effects of adding (LAB) to a high-starch diet on glucose and lipid metabolism, gut microbiota, and the composition of metabolites in . This experiment was equipped with three isonitrogenous and isoenergetic feeds as control group (LW), high starch group (HW), and high starch with LAB group (HP). A total of 180 experimental fish (13.5 ± 0.5 g) were randomly divided into three treatments, and three floating cages (1 m × 1 m × 1 m) were set up for each treatment. A total of 20 fish per net were kept in an outdoor pond for 8 weeks. The results showed that both the HW and HP groups had an altered structure and a reduced diversity of gut microbiota. LAB increased the abundance of and the ratio of Firmicutes/Bacteroidota and decreased PC (16:1/20:5) and taurochenodeoxycholic acid levels. LAB promoted the expression of genes related to the intestinal bile acid cycle (, , , and ) and inhibited the expression of and ( < 0.05). LAB reduced the expression of genes related to transported cholesterol ( and ) ( < 0.05) in the liver. In conclusion, LAB addition could regulate the gut microbiota disorders caused by high starch levels, promote cholesterol metabolism, produce bile acids, and reduce lipid deposition.

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