Cited by 88Veterinary Equine Medical ResearchRuminant Nutrition and Digestive PhysiologyAnimal Nutrition and Physiology

Adaptive response of equine intestinal Na+/glucose co-transporter (SGLT1) to an increase in dietary soluble carbohydrate

Dyer, Jane, Al-Rammahi, Miran, Waterfall, Louise, Salmon, Kieron S. H., Geor, Ray J., Bouré, Ludovic, Edwards, G. Barrie, Proudman, Christopher J. +1 more·2009·Pflügers Archiv - European Journal of Physiology

Abstract

Experimental and epidemiological evidence suggests that consumption of hydrolyzable carbohydrate, hCHO (grain), by horses is an important risk factor for colic, a common cause of equine mortality. It is unknown whether the small intestinal capacity to digest hCHO and/or to absorb monosaccharides is limiting, or even if horses can adapt to increased carbohydrate load. We investigated changes in the brush-border membrane carbohydrate digestive enzymes and glucose absorptive capacity of horse small intestine in response to increased hCHO. Expression of the Na(+)/glucose co-transporter, SGLT1, was assessed by Western blotting, immunohistochemistry, Northern blotting, QPCR, and Na(+)-dependent D-glucose transport. Glucose transport rates, SGLT1 protein, and mRNA expression were all 2-fold higher in the jejunum and 3- to 5-fold higher in the ileum of horses maintained on a hCHO-enriched diet compared to pasture forage. Activity of the disaccharidases was unaltered by diet. In a well-controlled study, we determined SGLT1 expression in the duodenal and ileal biopsies of horses switched, gradually over a 2-month period, from low (<1.0 g/kg bwt/day) to high hCHO (6.0 g/kg bwt/day) diets of known composition. We show that SGLT1 expression is enhanced, with time, 2-fold in the duodenum and 3.3-fold in the ileum. The study has important implications for dietary management of the horse.

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Crossref · 10.1007/s00424-008-0620-4

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  • A high-carbohydrate diet increases the number of sodium glucose co-transporter transporters in the intestine and their activity, allowing greater carbohydrate absorption and oxidation during exercise.

    “For example, a high-carbohydrate diet will increase the number of sodium glucose co-transporter transporters in the intestine as well as the activity of the transporters [75–78], allowing greater carbohydrate absorption and oxidation during exercise [74].”

    From Periodized Nutrition for Athletes (2017) · cites this paper as [76]

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Authors
Dyer, J., Al-Rammahi, M., Waterfall, L., Salmon, K. S. H., Geor, R. J., Bouré, L., Edwards, G. B., Proudman, C. J., & Shirazi-Beechey, S. P.
Affiliations
  • University of Liverpool (GB)
  • Ontario Veterinary College (CA)
Venue
Pflügers Archiv - European Journal of Physiology
Published
2008-12-02
Volume
458
Issue
2
Pages
419-430
ISSN
  • 0031-6768 (ISSN-L)
  • 1432-2013
OpenAlex
W1997475562
Cited by
88
References
44
Citations by year
2026: 1 · 2025: 5 · 2024: 5 · 2023: 6 · 2022: 4 · 2021: 4 · 2020: 4 · 2019: 9 · 2018: 2 · 2017: 5 · 2016: 1 · 2015: 3 · 2014: 10 · 2013: 8 · 2012: 7
FWCI
6.96
Type
journal article
Language
en
Open access
closed
Locations
  • Pflügers Archiv - European Journal of Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Surrey Research Insight Open Access (The University of Surrey) (submittedVersion)
Funders
  • Horse Trust
  • Natural Sciences and Engineering Research Council of Canada
Topics
  • Health Sciences › Veterinary › Equine › Veterinary Equine Medical Research
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
Keywords
SGLT1, horses, colic, small intestine, glucose absorption, brush border enzymes, disaccharidases, dietary adaptation, duodenum, ileum, jejunum, monosaccharide transport
MeSH terms
Adaptation, Physiological, alpha-Glucosidases, Animals, Dietary Carbohydrates, Female, Horses, Ileum, Immunohistochemistry, Jejunum, Male, Microvilli, RNA, Messenger, Solubility, Sucrase, Sodium-Glucose Transporter 1, Glucose Transporter Type 2

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