Cited by 70Biochemical Analysis and Sensing TechniquesVeterinary Equine Medical ResearchGastrointestinal motility and disorders

Expression of sweet receptor components in equine small intestine: relevance to intestinal glucose transport

Daly, Kristian, Al-Rammahi, Miran, Arora, Daleep K., Moran, Andrew W., Proudman, Christopher J., Ninomiya, Yuzo, Shirazi-Beechey, Soraya P.·2012·American Journal of Physiology-Regulatory, Integrative and Comparative Physiology

Abstract

The heteromeric sweet taste receptor T1R2-T1R3 is expressed on the luminal membrane of certain populations of enteroendocrine cells. Sensing of sugars and other sweet compounds by this receptor activates a pathway in enteroendocrine cells, resulting in secretion of a number of gut hormones, including glucagon-like peptide 2 (GLP-2). This subsequently leads to upregulation in the expression of intestinal Na+/glucose cotransporter, SGLT1, and increased intestinal glucose absorption. On the basis of the current information available on the horse genome sequence, it has been proposed that the gene for T1R2 ( Tas1R2) is absent in the horse. We show here, however, that horses express both the mRNA and protein for T1R2. Equine T1R2 is most closely homologous to that in the pig and the cow. T1R2 protein, along with T1R3, α-gustducin, and GLP-2 proteins are coexpressed in equine intestinal endocrine cells. Intravenous administration of GLP-2, in rats and pigs, leads to an increase in the expression of SGLT1 in absorptive enterocytes and enhancement in blood glucose concentrations. GLP-2 receptor is expressed in enteric neurons, excluding the direct effect of GLP-2 on enterocytes. However, electric stimulation of enteric neurons generates a neural response leading to SGLT1 upregulation, suggesting that sugar in the intestine activates a reflex increase in the functional expression of SGLT1. Horses possess the ability to upregulate SGLT1 expression in response to increased dietary carbohydrates, and to enhance the capacity of the gut to absorb glucose. The gut sweet receptor provides an accessible target for manipulating the equine gut to absorb glucose (and water), allowing greater energy uptake and hydration for hard-working horses.

Integrity signals

Registry

Crossref · 10.1152/ajpregu.00031.2012

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

1 of the 51 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Daly, K., Al-Rammahi, M., Arora, D. K., Moran, A. W., Proudman, C. J., Ninomiya, Y., & Shirazi-Beechey, S. P.
Affiliations
  • University of Liverpool (GB)
  • Kyushu University (JP)
  • Epithelial Function and Development Group, Department of Functional and Comparative Genomics, Institute of Integrative Biology, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom;
Venue
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
Published
2012-07-15
Volume
303
Issue
2
Pages
R199-R208
ISSN
  • 0363-6119 (ISSN-L)
  • 1522-1490
OpenAlex
W2096728081
Cited by
70
References
51
Citations by year
2025: 5 · 2024: 4 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 5 · 2019: 5 · 2018: 6 · 2017: 4 · 2016: 6 · 2015: 7 · 2014: 7 · 2013: 7 · 2012: 4
FWCI
7.44
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Regulatory, Integrative and Comparative Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Surrey Research Insight Open Access (The University of Surrey) (submittedVersion)
Funders
  • University of Pennsylvania
  • Horserace Betting Levy Board
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Biochemical Analysis and Sensing Techniques
  • Health Sciences › Veterinary › Equine › Veterinary Equine Medical Research
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
sweet taste receptor, T1R2, T1R3, equine small intestine, intestinal glucose absorption, SGLT1, glucagon-like peptide-2, enteroendocrine cells, alpha-gustducin, enteric neurons, gastrointestinal hormones, horses, dietary carbohydrates, hydration
MeSH terms
Amino Acid Sequence, Animals, Biological Transport, Cats, Dietary Carbohydrates, Energy Metabolism, Epithelial Cells, Female, Glucose, Horses, Intestine, Small, Male, Molecular Sequence Data, Swine, Tongue, Transducin, Enteroendocrine Cells, Receptors, G-Protein-Coupled, Sodium-Glucose Transporter 1, Glucagon-Like Peptide 2

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review