Cited by 47Pancreatic function and diabetesDiabetes Treatment and ManagementDiabetes Management and Research

EJE PRIZE 2018: A gut feeling about glucagon

Knop, Filip K·2018·European Journal of Endocrinology

Abstract

Hyperglucagonaemia (in the fasting as well as in the postprandial state) is considered a core pathophysiological component of diabetes and is found to contribute substantially to the hyperglycaemic state of diabetes. Hyperglucagonaemia is usually viewed upon as a consequence of pancreatic alpha cell insensitivity to the glucagon-suppressive effects of glucose and insulin. Since we observed that the well-known hyperglucagonaemic response to oral glucose in patients with type 2 diabetes is exchanged by normal suppression of plasma glucagon levels following isoglycaemic intravenous glucose administration in these patients, we have been focusing on the gut and gut-derived factors as potential mediators of diabetic hyperglucagonaemia. In a series of clinical experiments, we have elucidated the role of gut-derived factors in diabetic hyperglucagonaemia and shown that glucose-dependent insulinotropic polypeptide promotes hyperglucagonaemia and that glucagon, hitherto considered a pancreas-specific hormone, may also be secreted from extrapancreatic tissues - most likely from proglucagon-producing enteroendocrine cells. Furthermore, our observation that fasting hyperglucagonaemia is unrelated to the diabetic state, but strongly correlates with obesity, liver fat content and circulating amino acids, has made us question the common 'pancreacentric' and 'glucocentric' understanding of hyperglucagonaemia and led to the hypothesis that steatosis-induced hepatic glucagon resistance (and reduced amino acid turnover) and compensatory glucagon secretion mediated by increased circulating amino acids constitute a complete endocrine feedback system: the liver-alpha cell axis. This article summarises the physiological regulation of glucagon secretion in humans and considers new findings suggesting that the liver and the gut play key roles in determining fasting and postabsorptive circulating glucagon levels.

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Crossref · 10.1530/eje-18-0197

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Authors
Knop, F. K.
Affiliations
University of Copenhagen (DK)
Corresponding author
Knop, Filip K
Venue
European Journal of Endocrinology
Published
2018-06
Volume
178
Issue
6
Pages
R267-R280
ISSN
  • 0804-4643 (ISSN-L)
  • 1479-683X
OpenAlex
W2799823142
Cited by
47
References
107
Citations by year
2026: 1 · 2025: 4 · 2024: 10 · 2023: 3 · 2022: 4 · 2021: 10 · 2020: 7 · 2019: 4 · 2018: 4
FWCI
1.39
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Funders
Steno Diabetes Center Copenhagen (SDCC 3.F CMP)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
Keywords
hyperglucagonaemia, glucagon secretion, type 2 diabetes, glucose-dependent insulinotropic polypeptide, proglucagon, enteroendocrine cells, hepatic steatosis, circulating amino acids, obesity, liver fat, glucagon resistance
MeSH terms
Diabetes Mellitus, Type 2, Fasting, Fatty Liver, Glucagon, Glucose, Glucose Tolerance Test, Humans, Hyperglycemia, Liver, Enteroendocrine Cells, Gastrointestinal Tract, Glucagon-Secreting Cells, Proglucagon

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