Endotoxin-induced metabolic changes in the conscious, unrestrained rat: Hypoglycemia and elevated blood lactate concentrations without hyperinsulinemia

G. A. Adeleye, L. M. Al-Jibouri, B. L. Furman, J. Parratt

Research output: Article

12 Citations (Scopus)

Abstract

The effects of E coli endotoxin on the plasma concentrations of glucose, lactate, and immunoreactive insulin (IRI) were studied in conscious unrestrained rats. Additionally the effects of endotoxin on glucose-induced elevations in the plasma IRI concentration and on the rate of disappearance of intravenous glucose load were examined. After a transient and small hyperglycemia endotoxin administration resulted in a progressive, dose dependent decrease in the plasma glucose concentration and a marked elevation of plasma lactate. The initial hyperglycemia was accompanied by a small, transient increase in the plasma IRI concentration. There was no increase in the plasma IRI concentration during the development of hypoglycemia. The hypoglycemic effect of endotoxin was fully manifest in streptozotocin diabetic rats which displayed low insulin concentrations initially and throughout the experiment. Endotoxin injection produced a significant reduction in the plasma IRI response to glucose administration and a decrease in the rate of disappearance of a glucose load. It is suggested that the metabolic effects of endotoxin in the rat are not mediated by an increase in insulin secretion.

Original languageEnglish
Pages (from-to)543-550
Number of pages8
JournalCirculatory Shock
Volume8
Issue number5
Publication statusPublished - 1981

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Hyperinsulinism
Hypoglycemia
Endotoxins
Lactic Acid
Insulin
Glucose
Hyperglycemia
Streptozocin
Hypoglycemic Agents
Escherichia coli
Injections

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

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abstract = "The effects of E coli endotoxin on the plasma concentrations of glucose, lactate, and immunoreactive insulin (IRI) were studied in conscious unrestrained rats. Additionally the effects of endotoxin on glucose-induced elevations in the plasma IRI concentration and on the rate of disappearance of intravenous glucose load were examined. After a transient and small hyperglycemia endotoxin administration resulted in a progressive, dose dependent decrease in the plasma glucose concentration and a marked elevation of plasma lactate. The initial hyperglycemia was accompanied by a small, transient increase in the plasma IRI concentration. There was no increase in the plasma IRI concentration during the development of hypoglycemia. The hypoglycemic effect of endotoxin was fully manifest in streptozotocin diabetic rats which displayed low insulin concentrations initially and throughout the experiment. Endotoxin injection produced a significant reduction in the plasma IRI response to glucose administration and a decrease in the rate of disappearance of a glucose load. It is suggested that the metabolic effects of endotoxin in the rat are not mediated by an increase in insulin secretion.",
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T1 - Endotoxin-induced metabolic changes in the conscious, unrestrained rat

T2 - Hypoglycemia and elevated blood lactate concentrations without hyperinsulinemia

AU - Adeleye, G. A.

AU - Al-Jibouri, L. M.

AU - Furman, B. L.

AU - Parratt, J.

PY - 1981

Y1 - 1981

N2 - The effects of E coli endotoxin on the plasma concentrations of glucose, lactate, and immunoreactive insulin (IRI) were studied in conscious unrestrained rats. Additionally the effects of endotoxin on glucose-induced elevations in the plasma IRI concentration and on the rate of disappearance of intravenous glucose load were examined. After a transient and small hyperglycemia endotoxin administration resulted in a progressive, dose dependent decrease in the plasma glucose concentration and a marked elevation of plasma lactate. The initial hyperglycemia was accompanied by a small, transient increase in the plasma IRI concentration. There was no increase in the plasma IRI concentration during the development of hypoglycemia. The hypoglycemic effect of endotoxin was fully manifest in streptozotocin diabetic rats which displayed low insulin concentrations initially and throughout the experiment. Endotoxin injection produced a significant reduction in the plasma IRI response to glucose administration and a decrease in the rate of disappearance of a glucose load. It is suggested that the metabolic effects of endotoxin in the rat are not mediated by an increase in insulin secretion.

AB - The effects of E coli endotoxin on the plasma concentrations of glucose, lactate, and immunoreactive insulin (IRI) were studied in conscious unrestrained rats. Additionally the effects of endotoxin on glucose-induced elevations in the plasma IRI concentration and on the rate of disappearance of intravenous glucose load were examined. After a transient and small hyperglycemia endotoxin administration resulted in a progressive, dose dependent decrease in the plasma glucose concentration and a marked elevation of plasma lactate. The initial hyperglycemia was accompanied by a small, transient increase in the plasma IRI concentration. There was no increase in the plasma IRI concentration during the development of hypoglycemia. The hypoglycemic effect of endotoxin was fully manifest in streptozotocin diabetic rats which displayed low insulin concentrations initially and throughout the experiment. Endotoxin injection produced a significant reduction in the plasma IRI response to glucose administration and a decrease in the rate of disappearance of a glucose load. It is suggested that the metabolic effects of endotoxin in the rat are not mediated by an increase in insulin secretion.

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