Differential influence of soluble dietary fibres on iIntestinal and hepatic carbohydrate response

Pontifex, Matthew G. ORCID: https://orcid.org/0000-0003-2174-2313, Mushtaq, Aleena, Le Gall, Gwenaëlle ORCID: https://orcid.org/0000-0002-1379-2196, Rodriguez-Ramiro, Ildefonso, Blokker, Britt Anne, Hoogteijling, Mara E. M., Ricci, Matthew, Pellizzon, Michael, Vauzour, David ORCID: https://orcid.org/0000-0001-5952-8756 and Müller, Michael ORCID: https://orcid.org/0000-0002-5930-9905 (2021) Differential influence of soluble dietary fibres on iIntestinal and hepatic carbohydrate response. Nutrients, 13 (12). ISSN 2072-6643

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Refined foods are commonly depleted in certain bioactive components that are abundant in ‘natural’ (plant) foods. Identification and addition of these ‘missing’ bioactives in the diet is, therefore, necessary to counteract the deleterious impact of convenience food. In this study, multiomics approaches were employed to assess the addition of the popular supplementary soluble dietary fibers inulin and psyllium, both in isolation and in combination with a refined animal feed. A 16S rRNA sequencing and 1H NMR metabolomic investigation revealed that, whilst inulin mediated an increase in Bifidobacteria, psyllium elicited a broader microbial shift, with Parasutterella and Akkermansia being increased and Enterorhabdus and Odoribacter decreased. Interestingly, the combination diet benefited from both inulin and psyllium related microbial changes. Psyllium mediated microbial changes correlated with a reduction of glucose (R −0.67, −0.73, respectively, p < 0.05) and type 2 diabetes associated metabolites: 3-methyl-2-oxovaleric acid (R −0.72, −0.78, respectively, p < 0.05), and citrulline (R −0.77, −0.71, respectively, p < 0.05). This was in line with intestinal and hepatic carbohydrate response (e.g., Slc2a2, Slc2a5, Khk and Fbp1) and hepatic lipogenesis (e.g., Srebf1 and Fasn), which were significantly reduced under psyllium addition. Although established in the liver, the intestinal response associated with psyllium was absent in the combination diet, placing greater significance upon the established microbial, and subsequent metabolomic, shift. Our results therefore highlight the heterogeneity that exists between distinct dietary fibers in the context of carbohydrate uptake and metabolism, and supports psyllium containing combination diets, for their ability to negate the impact of a refined diet.

Item Type: Article
Additional Information: Funding Information: Funding: This research was part funded by The Norwich Medical School, Research Diets, Inc. and by a BBSRC grant (BBS/E/F/00044506).
Uncontrolled Keywords: psyllium,inulin,microbiome,metabolome,carbohydrate metabolism,psyllium,metabolome,carbohydrate metabolism,microbiome,food science,nutrition and dietetics,sdg 3 - good health and well-being ,/dk/atira/pure/subjectarea/asjc/1100/1106
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
UEA Research Groups: Faculty of Medicine and Health Sciences > Research Groups > Nutrition and Preventive Medicine
Faculty of Medicine and Health Sciences > Research Centres > Norwich Institute for Healthy Aging
Faculty of Medicine and Health Sciences > Research Groups > Gastroenterology and Gut Biology
Faculty of Medicine and Health Sciences > Research Centres > Lifespan Health
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Depositing User: LivePure Connector
Date Deposited: 30 Nov 2021 01:44
Last Modified: 19 Oct 2023 03:11
URI: https://ueaeprints.uea.ac.uk/id/eprint/82451
DOI: 10.3390/nu13124278


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