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Åke Lernmark

Principal investigator

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Pancreatic beta-cell function evaluated by intravenous glucose and glucagon stimulation. A comparison between insulin and c-peptide to measure insulin secretion

Author

  • A. Gottsäter
  • M. Landin-Olsson
  • P. Fernlund
  • B. Gullberg
  • Å Lernmark
  • G. Sundkvist

Summary, in English

Insulin and C-peptide responses to 0.5 g kg-1 intravenous glucose and 1.0 mg glucagon were studied in 34 healthy subjects (age 19-78 years, mean 45). Fasting blood glucose (r=0.59; p<0.001) and glycosylated haemoglobin (r=0.61; p<0.001) increased with age, but not the initial C-peptide and insulin responses to the glucose infusion. However, the C-peptide response at 70 min (r=0.36; p<0.05), 80 min (r=0.41; p<0.05), and 90 min (r=0.46; p<0.01) after the glucose infusion correlated with age as well as both insulin (r=0.42; p<0.05) and C-peptide (r=0.45; p<0.05) responses to the glucagon injection. Reproducibility of insulin and C-peptide responses was evaluated by duplicate tests, separated 2-143 days in time, in 10 healthy subjects (age 19-48 years, mean 32 years) showing no significant differences in median within-subject variation between the initial (1+3 min) or overall (0-90 min area under curve) insulin (24% and 17% respectively) and C-peptide (15% and 14% respectively) responses to glucose, while the within-subject variation for the fasting values and the response to glucagon was higher (p<0.05) for insulin (47% and 32% respectively) than C-peptide (13% and 14% respectively). Between-subject variation was also lower (p<0.001) for C-peptide than for insulin. Thus, C-peptide measurements in healthy subjects are more reproducible than insulin measurements in determination of beta-cell function.

Department/s

  • Vascular Diseases - Clinical Research
  • Medicine, Lund
  • Clinical Chemistry, Malmö
  • Nutrition Epidemiology
  • Department of Laboratory Medicine
  • Department of Clinical Sciences, Malmö

Publishing year

1992-01-01

Language

English

Pages

631-639

Publication/Series

Scandinavian Journal of Clinical and Laboratory Investigation

Volume

52

Issue

7

Document type

Journal article

Publisher

Informa Healthcare

Topic

  • Endocrinology and Diabetes

Keywords

  • Glucagon stimulation
  • Glucose tolerance test
  • Reproducibility

Status

Published

Research group

  • Vascular Diseases - Clinical Research
  • Clinical Chemistry, Malmö
  • Nutrition Epidemiology

ISBN/ISSN/Other

  • ISSN: 0036-5513