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Updated: Aug 12, 2026

Hyperinsulinemic-euglycemic Clamps in Conscious, Unrestrained Mice
Published on: November 16, 2011
Insulin and glucagon relationship during aging in man
Aging healthy adults show reduced glucose clearance but maintain normal insulin and glucagon secretion. This suggests other factors, not hormone abnormalities, may cause age-related carbohydrate intolerance.
Area of Science:
- Endocrinology
- Gerontology
- Metabolism
Background:
- Aging is associated with changes in glucose metabolism.
- Glucoregulatory hormones, insulin and glucagon, play key roles in glucose homeostasis.
- Understanding hormonal changes with aging is crucial for metabolic health.
Purpose of the Study:
- To investigate alterations in insulin and glucagon secretion with aging in healthy humans.
- To assess the relationship between age, fat mass, and glucose regulation.
- To determine if impaired carbohydrate tolerance in aging is due to abnormal hormone release.
Main Methods:
- Evaluated 44 healthy volunteers (22-81 years) measuring basal glucose, insulin, and glucagon.
- Assessed alpha and beta cell secretory capacities via glucose and arginine stimulation.
- Measured glucose disappearance rate (Kg) and hormone release post-stimulation.
Main Results:
- Percentage adiposity increased with age, but weight did not differ significantly.
- Basal glucose, insulin, and glucagon levels remained unchanged with age.
- Elderly individuals had a significantly slower glucose disappearance rate (Kg).
- Glucose-induced insulin release and arginine-stimulated insulin/glucagon release were similar between young and old groups.
Conclusions:
- Despite decreased glucose clearance with aging, insulin and glucagon secretion remain largely intact in healthy individuals.
- Age-related carbohydrate intolerance may stem from mechanisms independent of insulin and glucagon secretion abnormalities.
- Further research is needed to identify the specific factors contributing to impaired glucose tolerance in aging populations.
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