Diabetologia

, Volume 29, Issue 10, pp 713–719

Heterogeneity of insulin responses: phases leading to Type 2 (non-insulin-dependent) diabetes mellitus in the rhesus monkey

  • B. C. Hansen
  • N. L. Bodkin
Originals

DOI: 10.1007/BF00870281

Cite this article as:
Hansen, B.C. & Bodkin, N.L. Diabetologia (1986) 29: 713. doi:10.1007/BF00870281

Summary

To determine the natural history of the development of Type 2 (non-insulin-dependent) diabetes mellitus, basal plasma insulin and glucose levels and responses to intravenous glucose tolerance tests were determined over a period of 6 years in 42 adult male rhesus monkeys (Macaca mulatta). Among the 28 obese monkeys (percent body fat > 22%) over the age of 10 years, 9 developed overt Type 2 diabetes (fasting plasma glucose, > 7.8 mmol/l; and reduced glucose disappearance rates, KG < 1.5), and 14 monkeys have shown progressive changes which suggest that they may also become diabetic. Application of a highly constant antecedent diet and a consistent 16-h fast minimized experimental variability, and permitted the identification of 8 phases in the progression from normal lean young adult to overt Type 2 diabetes. The earliest changes which could be detected were a slight increase followed by a progressive rise in fasting plasma insulin levels and an increased insulin secretion in response to a glucose stimulus. These events preceded by several years the onset of a gradual deterioration of glucose tolerance. We found that hyper-, normo-, or hypoinsulinaemia could be associated with normoglycaemia or varying degrees of hyperglycaemia; however, the prospective longitudinal study of individual monkeys clearly identified this apparent heterogeneity of plasma insulin and glucose levels as reflecting sequential changes in a continuum of events preceding or accompanying the development of impaired glucose tolerance and Type 2 diabetes mellitus.

Keywords

Rhesus monkeys Macaca mulatta obesity glucose tolerance hyperinsulinaemia hyperglycaemia 

Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • B. C. Hansen
    • 1
  • N. L. Bodkin
    • 1
  1. 1.Department of Physiology, c/o Graduate School, Suite 257University of MarylandBaltimoreUSA

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