Cited by 351Diabetes Management and ResearchPancreatic function and diabetesGrowth Hormone and Insulin-like Growth Factors

The role of adrenergic mechanisms in the substrate and hormonal response to insulin-induced hypoglycemia in man.

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Garber, A J, Cryer, P E, Santiago, J V, Haymond, M W, Pagliara, A S, Kipnis, D M·1976·Journal of Clinical Investigation

Abstract

Sequential determinations of glucose outflow and inflow, and rates of gluconeogenesis from alanine, before, during and after insulin-induced hypoglycemia were obtained in relation to alterations in circulating epinephrine, norepinephrine, glucagon, cortisol, and growth hormone in six normal subjects. Insulin decreased the mean (+/-SEM) plasma glucose from 89+/-3 to 39+/-2 mg/dl 25 min after injection, but this decline ceased despite serum insulin levels of 153+/-22 mul/ml. Before insulin, glucose inflow and outflow were constant averaging 125.3+/-7.1 mg/kg per h. 15 min after insulin, mean glucose outflow increased threefold, but then decreased at 25 min, reaching a rate 15% less than the preinsulin rate. Glucose inflow decreased 80% 15 min after insulin, but increased at 25 min, reaching a maximum of twice the basal rate. Gluconeogenesis from alanine decreased 68% 15 min after insulin, but returned to preinsulin rates at 25 min, and remained constant for the next 25 min, after which it increased linearly. A fourfold increase in mean plasma epinephrine was found 20 min after insulin, with maximal levels 50 times basal. Plasma norepinephrine concentrations first increased significantly at 25 min after insulin, whereas significantly increased levels of cortisol and glucagon occurred at 30 min, and growth hormone at 40 min after insulin. Thus, insulin-induced hypoglycemia in man results from both a decrease in glucose production and an increase in glucose utilization. Accelerated glycogenolysis produced much of the initial, posthypoglycemic increment in glucose production. The contribution of glycogenolysis decreased with time, while that of gluconeogenesis from alanine increased. Of the hormones studied, only the increments in plasma catecholamines preceded or coincided with the measured increase in glucose production after hypoglycemia. It therefore seems probable that adrenergic mechanisms play a major role in the initiation of counter-regulatory responses to insulin-induced hypoglycemia in man.

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Crossref · 10.1172/jci108460

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Authors
Garber, A. J., Cryer, P. E., Santiago, J. V., Haymond, M. W., Pagliara, A. S., & Kipnis, D. M.
Affiliations
Howard Hughes Medical Institute (US)
Venue
Journal of Clinical Investigation
Published
1976-07-01
Volume
58
Issue
1
Pages
7-15
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2151836253
Cited by
351
References
7
Citations by year
2025: 3 · 2024: 1 · 2021: 3 · 2020: 4 · 2019: 1 · 2018: 3 · 2017: 1 · 2016: 3 · 2015: 2 · 2014: 3 · 2013: 2
FWCI
17.54
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
Keywords
insulin-induced hypoglycemia, counterregulatory response, adrenergic mechanisms, epinephrine, norepinephrine, glucagon, cortisol, growth hormone, gluconeogenesis, alanine, glycogenolysis, glucose production, glucose utilization, catecholamines
MeSH terms
Adrenergic alpha-Agonists, Adult, Alanine, Epinephrine, Glucagon, Gluconeogenesis, Glucose, Humans, Hydrocortisone, Hypoglycemia, Insulin, Kinetics, Male, Norepinephrine, Radioisotope Dilution Technique, Growth Hormone, Sympathetic Nervous System

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