Cited by 73Pancreatic function and diabetesDiabetes Treatment and ManagementDiabetes, Cardiovascular Risks, and Lipoproteins

Insulin resistant subjects lack islet adaptation to short-term dexamethasone-induced reduction in insulin sensitivity

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Larsson, H., Ahrén, B.·1999·Diabetologia

Abstract

Aims/hypothesis To establish whether islet compensation to deterioration of insulin action depends on inherent insulin sensitivity.Methods We examined insulin and glucagon secretion after i.v. arginine (5 g) at fasting, 14 and greater than 25 mmol/l glucose concentrations before and after lowering of insulin sensitivity by oral dexamethasone (3 mg twice daily for 2 1/2 days) in 10 women with normal glucose tolerance, aged 58 or 59 years. Five women had high insulin sensitivity as shown by euglycaemic, hyperinsulinaemic clamp (99 +/- 12 nmol glucose.kg body weight-1.min-1/pmol insulin.l-1; means +/- SD) whereas five women had low insulin sensitivity (34 +/- 15 nmol glucose.kg body weight-1.min-1/pmol insulin.l-1).Results Dexamethasone reduced insulin sensitivity in both groups. Fasting insulin concentration increased by dexamethasone in high insulin sensitivity (72 +/- 10 vs 49 +/- 9 pmol/l, p = 0.043) but not in low insulin sensitivity (148 +/- 63 vs 145 +/- 78 pmol/l) whereas the fasting glucose concentration increased in low insulin sensitivity (6.5 +/- 0.8 vs 5.8 +/- 0.6 mmol/l, p = 0.043) but not in high insulin sensitivity (5.3 +/- 0.8 vs 5.3 +/- 0.6 mmol/l). Fasting glucagon concentration was not changed. Plasma insulin concentrations after raising glucose to 14 and more than 25 mmol/l and the insulin response to arginine at more than 25 mmol/l glucose were increased by dexamethasone in high insulin sensitivity (p < 0.05) but not changed by dexamethasone in low insulin sensitivity. Furthermore, in high but not in low insulin sensitivity, dexamethasone reduced the glucagon response to arginine (p = 0.043).Conclusion/interpretation The results show that adaptation in islets function to dexamethasone-induced short-term reduction in insulin sensitivity is lacking in subjects with low inherent insulin sensitivity.

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Authors
Larsson, H., & Ahrén, B.
Affiliations
Lund University (SE)
Venue
Diabetologia
Published
1999-07-29
Volume
42
Issue
8
Pages
936-943
ISSN
  • 0012-186X (ISSN-L)
  • 1432-0428
OpenAlex
W2032125948
Cited by
73
References
45
Citations by year
2026: 1 · 2025: 2 · 2024: 4 · 2023: 4 · 2022: 2 · 2020: 3 · 2019: 1 · 2018: 4 · 2016: 4 · 2015: 3 · 2014: 6 · 2013: 6 · 2012: 5
FWCI
1.41
Type
journal article
Language
en
Open access
Locations
  • Diabetologia (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Lunds Universitet
  • Malmö Högskola
  • Medical Research Council
  • Medicinska Fakulteten, Lunds Universitet
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, Cardiovascular Risks, and Lipoproteins
Keywords
insulin resistance, dexamethasone, insulin sensitivity, insulin secretion, glucagon secretion, arginine stimulation, beta-cell adaptation, glucocorticoids, hyperinsulinemic-euglycemic clamp
MeSH terms
Insulin Secretion, Arginine, Blood Glucose, Dexamethasone, Fasting, Female, Glucagon, Glucocorticoids, Glucose Tolerance Test, Glycated Hemoglobin, Humans, Infusions, Intravenous, Insulin, Insulin Resistance, Islets of Langerhans, Middle Aged, Glucose Clamp Technique, Postmenopause

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