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A mix of functional amino acids and grape polyphenols promotes the growth of piglets, modulates the gut microbiota in vivo and regulates epithelial homeostasis in intestinal organoids

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Abstract

Weaning is a challenging period for gut health in piglets. Previous studies showed that dietary supplementations with either amino acids or polyphenols promote piglet growth and intestinal functions, when administered separately. Thus, we hypothesized that a combination of amino acids and polyphenols could facilitate the weaning transition. Piglets received during the first two weeks after weaning a diet supplemented or not with a mix of a low dose (0.1%) of functional amino acids (l-arginine, l-leucine, l-valine, l-isoleucine, l-cystine) and 100 ppm of a polyphenol-rich extract from grape seeds and skins. The mix of amino acids and polyphenols improved growth and feed efficiency. These beneficial effects were associated with a lower microbiota diversity and a bloom of Lactobacillaceae in the jejunum content while the abundance of Proteobacteria was reduced in the caecum content. The mix of amino acids and polyphenols also increased the production by the caecum microbiota of short-chain fatty acids (butyrate, propionate) and of metabolites derived from amino acids (branched-chain fatty acids, valerate, putrescine) and from polyphenols (3-phenylpropionate). Experiments in piglet jejunum organoids revealed that the mix of amino acids and polyphenols upregulated the gene expression of epithelial differentiation markers while it reduced the gene expression of proliferation and innate immunity markers. In conclusion, the supplementation of a mix of amino acids and polyphenols is a promising nutritional strategy to manage gut health in piglets through the modulation of the gut microbiota and of the epithelial barrier.

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Acknowledgements

The authors are grateful to the genotoul bioinformatics platform Toulouse Occitanie (Bioinfo Genotoul, https://doi.org/10.15454/1.5572369328961167E12) and Sigenae group for providing computing and storage resources to Galaxy instance (http://sigenae-workbench.toulouse.inra.fr). The authors acknowledge the metabolomics platform Axiom (MetaToul-MetaboHUB, Toulouse, France) and the BioToMyc research group (Toxalim, Université de Toulouse, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France) for providing the pig jejunum sample used for organoid culture. We are grateful to Sylvie Combes (GenPhySE, Université de Toulouse, INRAE, ENVT, Castanet Tolosan, France) for careful revision of the manuscript.

Funding

The present work received the financial support from Ajinomoto Animal Nutrition Europe.

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Authors and Affiliations

Authors

Contributions

MB, WL and TCD conceived the experiments. MB, CL, PO, LP and JVD performed the experiments. MB and TCD analyzed the data. MB and TCD wrote the manuscript. All authors approved the final version of the manuscript.

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Correspondence to Martin Beaumont.

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Conflicts of interest

TCD and WL are employees of METEX NOOVISTAGO.

Ethical approval

For in vivo experiments, animals were handled in accordance with proper animal welfare guidelines from the Bangkok animal research center Co., Ltd (Bangkok, Thailand). Sampling of pig intestinal tissue for organoid culture was approved by a local ethical committee (N°TOXCOM/0163PP, Toulouse, France).

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Handling editor: G. Wu.

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Beaumont, M., Lencina, C., Painteaux, L. et al. A mix of functional amino acids and grape polyphenols promotes the growth of piglets, modulates the gut microbiota in vivo and regulates epithelial homeostasis in intestinal organoids. Amino Acids 54, 1357–1369 (2022). https://doi.org/10.1007/s00726-021-03082-9

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  • DOI: https://doi.org/10.1007/s00726-021-03082-9

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