Sulfonylureas are a class of antidiabetes medications prescribed to millions of individuals worldwide. Rodents have been used extensively to study sulfonylureas in the laboratory. Here, we report the results of studies treating mice with a sulfonylurea (glimepiride) in order to understand how the drug affects glucose homeostasis and tolerance. We tested the effect of glimepiride on fasting blood glucose, glucose tolerance, and insulin secretion, using glimepiride sourced from a local pharmacy. We also examined the effect on glucagon, gluconeogenesis, and insulin sensitivity. Unexpectedly, glimepiride exposure in mice was associated with fasting hyperglycemia, glucose intolerance, and decreased insulin. There was no change in circulating glucagon levels or gluconeogenesis. The effect was dose-dependent, took effect by two weeks, and was reversed within three weeks after removal. Glimepiride elicited the same effects in all strains evaluated: four wild-type strains, as well as the transgenic Grn −/− and diabetic db/db mice. Our findings suggest that the use of glimepiride as a hypoglycemic agent in mice should proceed with caution and may have broader implications about mouse models as a proxy to study the human pharmacopeia.
|Journal||Journal of Diabetes Research|
|State||Published - 2018|
Bibliographical noteFunding Information:
Grant support came from NIH-NIA grants AG042419, AG057187, and AG050146. We thank Dr. M. P. Murphy (University of Kentucky) for providing the db/db mice and Dr. Kathryn Saatman (University of Kentucky) for providing the Grn
Copyright © 2018 Dana M. Niedowicz et al.
ASJC Scopus subject areas
- Endocrinology, Diabetes and Metabolism