Response to glucose infusion in humans: Role of changes in insulin concentration

R. R. Wolfe, J. H F Shaw, F. Jahoor, David Herndon

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We have used the primed-constant infusion of stable isotopes of glucose ([6,6-d2]glucose), alanine ([3-13C]alanine), and urea ([15N2]urea) to investigate their kinetic interrelationships in normal volunteers in the postabsorptive state and during the infusion of unlabeled glucose at two rates. Each glucose infusion was tested with and without the simultaneous infusion of somatostatin (S), insulin (I), and glucagon (G) to clamp those hormonal levels. When glucose was infused at 1 mg·kg-1·min-1, endogenous glucose production was suppressed almost exactly 1 mg·kg-1·min-1, regardless of whether S plus I plus G were infused. The 4 mg·kg-1·min-1 glucose infusion suppressed endogenous glucose production, both with and without hormonal control. The plasma concentration of glucose also increased to the same extent during the 4 mg·kg-1·min-1 infusion in both protocols, which indicated that the spontaneous insulin response to the glucose infusion (an increase from 11 ± 2 to 24 ± 3 μU/ml) did not stimulate the peripheral clearance of glucose. The high rate of glucose infusion, both with or without hormonal control, stimulated alanine flux and inhibited urea production. These results indicate that glucose, per se, is an important direct controller of normal metabolic interactions of endogenous alanine, glucose, and urea kinetics.

Original languageEnglish (US)
JournalAmerican Journal of Physiology - Endocrinology and Metabolism
Volume250
Issue number3
StatePublished - 1986
Externally publishedYes

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Insulin
Glucose
Alanine
Urea
Kinetics
Clamping devices
Somatostatin
Glucagon
Isotopes
Healthy Volunteers
Fluxes
Plasmas
Controllers

ASJC Scopus subject areas

  • Physiology
  • Endocrinology
  • Biochemistry

Cite this

Response to glucose infusion in humans : Role of changes in insulin concentration. / Wolfe, R. R.; Shaw, J. H F; Jahoor, F.; Herndon, David.

In: American Journal of Physiology - Endocrinology and Metabolism, Vol. 250, No. 3, 1986.

Research output: Contribution to journalArticle

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