Cited by 230Pancreatic function and diabetesDiabetes Treatment and ManagementDiabetes and associated disorders

Characterization of the Effects of Arginine and Glucose on Glucagon and Insulin Release from the Perfused Rat Pancreas

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Gerich, John E., Charles, M. Arthur, Grodsky, Gerold M.·1974·Journal of Clinical Investigation

Abstract

To characterize the mechanisms by which arginine and glucose affect pancreatic alpha and beta cell function, the effects of these agents over their full dose response, both alone and in various combinations, were studied using the perfused rat pancreas. Arginine (0-38 mM), in the absence of glucose, stimulated biphasic glucagon (IRG) secretion (Km approximately 3-4 mM) at concentrations less than 1 mM and caused nonphasic insulin (IRI) release (Km approximately 12-13 mM) but only at concentrations greater than 6 mM. Glucose (0-27.5 mM) alone stimulated biphasic IRI release (Km approximately 9-10 mM) at concentrations in excess of 5.5 mM and caused nonphasic inhibition of IRG secretion (Kt approximately 5-6 mM) at concentrations as low as 4.1 mM. These results demonstrate fundamental differences in pancreatic alpha and beta cell secretory patterns in response to glucose and arginine and suggest that glucagon secretion is more sensitive to the effect of both glucose and arginine. Various concentrations of arginine in the presence of 5.5 mM glucose stimulated biphasic IRG and IRI release: IRG responses were diminished and IRI responses were enhanced compared with those seen with arginine in the absence of glucose. Glucose (0-27.5 mM) in the presence of 3.2 or 19.2 mM arginine caused similar inhibition of IRG secretion (Km approximately 5-6 mM) and stimulation of IRI release (Km approximately 9-10 mM) as that seen with glucose alone, although greater IRG and IRI release occurred. This augmentation of IRI secretion was greater than that expected from mere additive effects of glucose and arginine. Classical Lineweaver-Burk analysis of these results indicates that glucose is a non-competitive inhibitor arginine-stimulated glucagon secretion and suggests that glucose and arginine affect pancreatic alpha and beta cell function via different mechanisms. In addition, comparison of simultaneous insulin and glucagon secretion patterns under various conditions suggests that endogenous insulin per se has little or no direct effect on IRG secretion and that endogenous glucagon does not appreciably affect pancreatic beta cell function.

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  • Glucagon secretion is inhibited by lower glucose concentrations than those stimulating insulin release.

    “Glucagon secretion is inhibited by lower glucose concentrations than those stimulating insulin release [41].”
  • Glucagon secretion occurs in response to hypoglycemia and is inhibited already when the glucose concentration reaches 4-6 mmol/l.

    “Secretion occurs in response to hypoglycemia and is inhibited already when the glucose concentration reaches 4 -6 mmol/l (7,8).”
  • The U-shaped dose-response patterns are different from those obtained with perfused rat pancreas and batch-incubated rat islets, which only show glucose inhibition of glucagon secretion.

    “The U-shaped dose-response patterns are different from those obtained with perfused rat pancreas (7) and batch-incubated rat islets (8), which only show glucose inhibition of glucagon secretion.”

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Research works printed but not linked: 4

  1. Unger, R. H., and P. Lefebvre. 1972. Glucagon physi- ology. In Glucagon Molecular Physiology, Clinical and Therapeutic Implications. R. H. Unger and P. Lefebvre, editors. Pergamon Press, Inc., Elmsford, N. Y. 213-244.
  2. Unger, R., and A. Eisentraut. 1967. Glucagon. In Hor- mones in Blood. C. Grey and A. Bacharach, editors. Academic Press, Inc., New York. 2nd edition. 1: 83- 128.
  3. Montague, W., and K W. Taylor. 1970. The role of the pentose phosphate pathway in insulin secretion, in the structure and metabolism of the pancreatic islets. S. Falkmer, B. Hellman, and I.-B. Thljedal, editors. Pergamon Press, Ltd., Oxford. 263-273.
  4. Samols, E., J. M. Tyler, and V. Marks. 1972. Gluca- gon-insulin interrelationships. In Glucagon Molecular Physiology Clinical and Therapeutic Implications. R. Unger and P. Lefebvre, editors. Pergamon Press, Inc., Elmsford, N. Y. 151.

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Authors
Gerich, J. E., Charles, M. A., & Grodsky, G. M.
Affiliations
University of California, San Francisco (US)
Venue
Journal of Clinical Investigation
Published
1974-10-01
Volume
54
Issue
4
Pages
833-841
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2102022791
Cited by
230
References
41
Citations by year
2026: 3 · 2025: 3 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 10 · 2020: 4 · 2019: 7 · 2018: 2 · 2017: 4 · 2016: 3 · 2015: 1 · 2014: 4 · 2013: 6 · 2012: 5
FWCI
11.50
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
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 › Genetics › Diabetes and associated disorders
Keywords
L-arginine, glucose, glucagon secretion, insulin secretion, alpha cells, pancreatic beta cells, non-competitive inhibition
MeSH terms
Insulin Secretion, Arginine, Dose-Response Relationship, Drug, Drug Interactions, Glucagon, Glucose, Insulin, Pancreas, Secretory Rate, Stimulation, Chemical

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