Cited by 64Pancreatic function and diabetesDiabetes Treatment and ManagementIon Transport and Channel Regulation

Dapagliflozin stimulates glucagon secretion at high glucose: experiments and mathematical simulations of human A-cells

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Pedersen, Morten Gram, Ahlstedt, Ingela, El Hachmane, Mickaël F., Göpel, Sven O.·2016·Scientific Reports

Abstract

Glucagon is one of the main regulators of blood glucose levels and dysfunctional stimulus secretion coupling in pancreatic A-cells is believed to be an important factor during development of diabetes. However, regulation of glucagon secretion is poorly understood. Recently it has been shown that Na(+)/glucose co-transporter (SGLT) inhibitors used for the treatment of diabetes increase glucagon levels in man. Here, we show experimentally that the SGLT2 inhibitor dapagliflozin increases glucagon secretion at high glucose levels both in human and mouse islets, but has little effect at low glucose concentrations. Because glucagon secretion is regulated by electrical activity we developed a mathematical model of A-cell electrical activity based on published data from human A-cells. With operating SGLT2, simulated glucose application leads to cell depolarization and inactivation of the voltage-gated ion channels carrying the action potential, and hence to reduce action potential height. According to our model, inhibition of SGLT2 reduces glucose-induced depolarization via electrical mechanisms. We suggest that blocking SGLTs partly relieves glucose suppression of glucagon secretion by allowing full-scale action potentials to develop. Based on our simulations we propose that SGLT2 is a glucose sensor and actively contributes to regulation of glucagon levels in humans which has clinical implications.

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Authors
Pedersen, M. G., Ahlstedt, I., El Hachmane, M. F., & Göpel, S. O.
Affiliations
  • University of Padua (IT)
  • AstraZeneca (Sweden) (SE)
Corresponding author
  • Pedersen, Morten Gram
  • Göpel, Sven O.
Venue
Scientific Reports
Published
2016-08-18
Volume
6
Issue
1
Pages
31214-31214
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2516573111
Cited by
64
References
48
Citations by year
2026: 2 · 2025: 7 · 2024: 7 · 2023: 3 · 2022: 2 · 2021: 7 · 2020: 16 · 2019: 10 · 2018: 5 · 2017: 4 · 2016: 1
FWCI
7.39
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion, cc-by-nc-nd)
Funders
  • European Foundation for the Study of Diabetes
  • Università degli Studi di Padova
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • 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
Keywords
dapagliflozin, SGLT2 inhibitors, glucagon secretion, pancreatic A cells, glucose detection, islets, action potential, membrane depolarization, voltage-gated ion channels, diabetes mellitus
MeSH terms
Animals, Benzhydryl Compounds, Cells, Cultured, Electric Stimulation, Glucagon, Glucose, Glucosides, Humans, Models, Theoretical, Glucagon-Secreting Cells, Sodium-Glucose Transporter 2, Mice

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