Cited by 106Biochemical Analysis and Sensing TechniquesDiabetes Treatment and ManagementMetabolism, Diabetes, and Cancer

Rapid upregulation of sodium-glucose transporter SGLT1 in response to intestinal sweet taste stimulation

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Stearns, Adam T., Balakrishnan, Anita, Rhoads, David B., Tavakkolizadeh, Ali·2010·Annals of Surgery

Abstract

OBJECTIVE: We set out to examine the short-term regulation of the intestinal sodium/glucose cotransporter SGLT1 by its substrate glucose and sweet taste analogs. SUMMARY BACKGROUND DATA: Intestinal SGLT1 is a putative target for antidiabetic therapy; however, its physiological regulation is incompletely understood, limiting its application as a pharmacological target. While it is clearly regulated by dietary composition over a period of days, its short-term regulation by nutrients is unknown. METHODS: Sprague-Dawley rats were anesthetized, and the duodenum cannulated. D-glucose, D-fructose, saccharin, D-mannitol, and water were infused for 3 hours, before harvest of proximal jejunum for SGLT1 analysis with Western blotting and quantitative polymerase chain reaction. In further experiments, the receptor region was identified by D-glucose infusion of isolated regions. Lastly, the vagus was de-afferented with capsaicin, and 5HT3-receptor activation of vagal afferents inhibited using ondansetron, before repeating experiments using water or D-glucose infusion. RESULTS: Infusion of D-glucose led to 2.9-fold up-regulation in SGLT1 compared with water or iso-osmotic D-mannitol; this effect was replicated by D-fructose or saccharin. This response was strongest following isolated infusions of duodenum and proximal jejunum, with a blunted effect distally; topography matched the expression profile of sweet taste receptor T1R2/T1R3. The reflex was abolished by capsaicin pretreatment, and blunted by ondansetron. CONCLUSIONS: The agonist response implicates the luminal-based sweet-taste receptor T1R2/T1R3, with the reflex apparently involving vagal afferents. The proximal nature of the sensor coincides with the excluded biliopancreatic limb in Roux-en-Y gastric bypass, and this may provide a novel explanation for the antidiabetic effect of this procedure.

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  • In animals, a wide range of sweet stimuli, including LCS, upregulate SGLT-1 expression and function.

    “In animals, a wide range of sweet stimuli are capable of upregulating SGLT-1 expression and function, including LCS (45-48), indicating that SGLT-1 activity is modulated by an upstream and broadly tuned sweet taste sensor.”
  • In rodents, intestinal areas adjacent to regions exposed to LCS have increased SGLT-1 expression.

    “Studies in rodents have shown that intestinal areas adjacent to regions exposed to LCS have increased SGLT-1 expression (46).”

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Authors
Stearns, A. T., Balakrishnan, A., Rhoads, D. B., & Tavakkolizadeh, A.
Affiliations
  • Brigham and Women's Hospital (US)
  • Harvard University (US)
Corresponding author
  • Stearns, Adam T.
  • Balakrishnan, Anita
  • Tavakkolizadeh, Ali
Venue
Annals of Surgery
Published
2010-05
Volume
251
Issue
5
Pages
865-871
ISSN
0003-4932 (ISSN-L)
OpenAlex
W1977878035
Cited by
106
References
57
Citations by year
2026: 6 · 2025: 4 · 2024: 5 · 2023: 5 · 2022: 3 · 2021: 7 · 2020: 8 · 2019: 5 · 2018: 5 · 2017: 5 · 2016: 3 · 2015: 9 · 2014: 10 · 2013: 7 · 2012: 7
FWCI
9.10
Type
journal article
Language
en
Open access
Locations
  • Annals of Surgery (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK047326, P30DK040561)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Biochemical Analysis and Sensing Techniques
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
SGLT1, sodium-glucose cotransporter, intestinal glucose transport, sweet taste receptor, T1R2/T1R3, fructose, saccharin, mannitol, vagal afferents, 5-HT3 receptor, capsaicin, Roux-en-Y gastric bypass, antidiabetic effect, proximal jejunum, duodenum
MeSH terms
Animals, Capsaicin, Duodenum, Glucose, Intestine, Small, Jejunum, Male, Mannitol, Sucrose, Sweetening Agents, Up-Regulation, Rats, Sprague-Dawley, Ondansetron, Dietary Sucrose, Receptors, G-Protein-Coupled, Sodium-Glucose Transporter 1, Rats

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