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Published on: November 16, 2011
Reference intervals for glucose, beta-cell polypeptides, and counterregulatory factors during prolonged fasting
K Hojlund1, M Wildner-Christensen, O Eshøj
1Diabetes Centre, Department of Endocrinology, Odense University Hospital, DK-5000 Odense C, Denmark. k.hojlund@dadlnet.dk
This study established reference intervals for glucose regulation during a 72-hour fast. It found a reduced pancreatic beta-cell response alongside increased counterregulatory hormones, valuable for diagnosing hypoglycemia.
Area of Science:
- Endocrinology
- Metabolism
- Human Physiology
Background:
- Prolonged fasting impacts glucose homeostasis.
- Understanding counterregulatory hormone responses is crucial for metabolic health.
Purpose of the Study:
- Establish reference intervals for pancreatic beta-cell and counterregulatory hormone responses during a 72-hour fast.
- Investigate the effects of gender and body mass index on these responses.
Main Methods:
- Studied 33 healthy subjects (16 males, 17 females) undergoing a 72-hour fast.
- Monitored glucose, insulin, C-peptide, proinsulin, glucagon, free fatty acids (FFA), epinephrine, norepinephrine, cortisol, and growth hormone levels.
- Analyzed data for changes during fasting and effects of gender and BMI.
Main Results:
- Glucose, insulin, C-peptide, and proinsulin levels decreased significantly during fasting.
- Counterregulatory factors including glucagon, FFA, epinephrine, norepinephrine, and cortisol increased.
- Growth hormone secretion showed a complex pattern, initially increasing then decreasing.
- Males exhibited higher glucose and glucagon but lower FFA levels.
- Higher BMI correlated with increased insulin and C-peptide levels.
Conclusions:
- Provided reference intervals for key glucoregulatory factors during prolonged fasting.
- Observed a diminished beta-cell response coupled with heightened counterregulatory hormone secretion.
- Results offer clinical and scientific value for investigating hypoglycemic disorders.
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