Cited by 267Diabetes Treatment and ManagementIon Transport and Channel RegulationMetabolism, Diabetes, and Cancer

Upregulation of SGLT-1 transport activity in rat jejunum induced by GLP-2 infusion in vivo

Cheeseman, C. I.·1997·American Journal of Physiology-Regulatory, Integrative and Comparative Physiology

Abstract

The effect of in vivo infusion of the peptide hormone glucagon-like peptide 2 (GLP-2) on glucose transport across the rat jejunal brush-border membrane (BBM) was assessed using isolated membrane vesicles. A 2-h infusion of GLP-2 produced a marked acceleration of sodium-dependent glucose uptake into BBM vesicles with a significant overshoot. There was no change in vesicle space or permeability resulting from the hormone infusion. Kinetic analysis showed this stimulation to be the result of a threefold increase in the maximal rate of transport, with no consistent change in the affinity constant ( K m). The time course of this response showed that the effect was observable, but smaller, after only 30 min of hormone infusion and was maximal after 1 h. Sodium-dependent phloridzin binding to the membrane vesicles showed a parallel increase in maximal binding after 1 and 2 h of hormone infusion. Western blotting showed a similar increase in sodium-dependent glucose transporter 1 (SGLT-1) abundance. The effect of GLP-2 could be blocked by luminal brefeldin A or wortmannin. These results indicate that GLP-2 is able to induce trafficking of SGLT-1 from an intracellular pool into the BBM within 60 min and that phosphoinositol 3-kinase may well be involved in the intracellular signaling pathway in this response.

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Crossref · 10.1152/ajpregu.1997.273.6.r1965

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  • GLP-2 release is STR-dependent in rodents and inhibited by gurmarin.

    “This is also true for GLP-2 release, which is STR-dependent in rodents (28,29) and inhibited by the murine STR inhibitor, gurmarin (30).”
  • Jugular vein infusion of GLP-2 increases SGLT-1 protein abundance and the rate of SGLT-1-dependent glucose transport in the apical membrane of jejunal enterocytes in rats, abolished by brefeldin.

    “Jugular vein infusion of GLP-2 increases the abundance of SGLT-1 protein and rate of SGLT-1-dependent glucose transport in the apical membrane of jejunal enterocytes in rats, a response abolished when protein translocation is inhibited with brefeldin (29,59).”

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Authors
Cheeseman, C. I.
Affiliations
University of Alberta (CA)
Corresponding author
Cheeseman, C. I.
Venue
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
Published
1997-12-01
Volume
273
Issue
6
Pages
R1965-R1971
ISSN
  • 0363-6119 (ISSN-L)
  • 1522-1490
OpenAlex
W2174791196
Cited by
267
References
30
Citations by year
2026: 2 · 2025: 4 · 2024: 8 · 2023: 4 · 2022: 9 · 2021: 6 · 2020: 9 · 2019: 7 · 2018: 9 · 2017: 7 · 2016: 10 · 2015: 6 · 2014: 17 · 2013: 9 · 2012: 11
FWCI
5.13
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Regulatory, Integrative and Comparative Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion Transport and Channel Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
glucagon-like peptide-2, SGLT1, glucose transport, intestinal glucose absorption, phosphoinositide 3-kinase signaling, brefeldin A, wortmannin
MeSH terms
Wortmannin, Androstadienes, Animals, Cyclopentanes, Glucagon-Like Peptides, Gastrointestinal Hormones, Glucose, Infusions, Intravenous, Intestinal Mucosa, Jejunum, Kinetics, Membrane Glycoproteins, Microvilli, Monosaccharide Transport Proteins, Peptides, Phlorhizin, Sodium, Brefeldin A, Sodium-Glucose Transporter 1, Rats, Glucagon-Like Peptide 2

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