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Hypoglycemia following insulin and proinsulin. A comparison
Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme
|August 1, 1986
Summary
Proinsulin causes slower, prolonged hypoglycemia compared to insulin due to its slower clearance. This impacts counterregulatory hormone responses, with the rate of glucose fall being the key determinant.
Area of Science:
- Endocrinology
- Metabolic Research
- Hormone Action
Background:
- Proinsulin is a precursor to insulin, and its metabolic effects are less understood.
- Investigating proinsulin's effects is crucial for understanding glucose regulation and potential therapeutic applications.
Purpose of the Study:
- To investigate the counterregulatory hormonal response to proinsulin-induced hypoglycemia.
- To compare the effects of proinsulin and insulin on glucose regulation and hormonal responses.
Main Methods:
- Eight healthy volunteers participated in the study.
- Intravenous bolus injection of proinsulin was administered to induce hypoglycemia.
- Counterregulatory hormonal responses, glucose levels, and associated symptoms were monitored.
Main Results:
- Proinsulin cleared slower from circulation, leading to slower and prolonged hypoglycemia.
- Hormonal responses (epinephrine, prolactin, norepinephrine, cortisol, growth hormone) and electrolyte changes (potassium, phosphate) were attenuated.
- Symptoms of hypoglycemia, such as sweating and dizziness, were milder with proinsulin.
Conclusions:
- The rate of glucose concentration fall, influenced by proinsulin's slower kinetics, dictates counterregulatory responses.
- Proinsulin's distinct effects are attributed to its clearance rate rather than unique insulin-like properties.