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Effect of increasing doses of recombinant human insulin-like growth factor-I on glucose, lipid, and leucine metabolism in man

Turkalj, I. and Keller, U. and Ninnis, R. and Vosmeer, S. and Stauffacher, W.. (1992) Effect of increasing doses of recombinant human insulin-like growth factor-I on glucose, lipid, and leucine metabolism in man. Journal of clinical endocrinology and metabolism, Vol. 75, H. 5. pp. 1186-1191.

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Official URL: http://edoc.unibas.ch/dok/A6419931

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Abstract

The metabolic effects of recombinant human insulin-like growth factor-I (IGF-I) were assessed in five groups of normal male overnight-fasted volunteers receiving infusions of either 0, 5, 7.5, 15, or 30 micrograms/kg.h IGF-I during 8 h, resulting in total plasma IGF-I concentrations 127 +/- 7, 247 +/- 30, 389 +/- 39, 573 +/- 62, 620 +/- 105 ng/ml, respectively. Glucose consumption (euglycemic glucose clamp) increased dose dependently during IGF-I infusion (P textless 0.001) up to 6.7 +/- 1.3 mg/kg. min in the 30 micrograms/kg.h group. Plasma triglyceride concentrations decreased with increasing doses of IGF-I (P textless 0.03); the fall was 43% in the 30 micrograms/kg.h group. Plasma free fatty acid concentrations decreased during 7.5, 15, and 30 micrograms/kg.h IGF-I by 23%, 34%, and 48%, respectively. IGF-I lowered plasma beta-hydroxybutyrate concentrations in a dose-dependent manner (P textless 0.025). Plasma concentrations of leucine and alpha-ketoisocaproate decreased dose dependently (P textless 0.001 and P textless 0.015). Whole body leucine flux (1-13C-leucine infusion technique) decreased with increasing doses of IGF-I by 41% during 30 micrograms/kg.h, indicating decreased whole body protein breakdown. Leucine oxidation into 13CO2 decreased with increasing doses of IGF-I (P textless 0.045) by 57% in the 30 micrograms/kg.h group, suggesting inhibition of irreversible loss of leucine. Plasma C-peptide and insulin concentrations decreased dose dependently (P textless 0.005 and P textless 0.02), indicating diminished insulin secretion. Thus, acute elevation of plasma IGF-I concentrations in man results in metabolic effects which are qualitatively similar to those described previously of insulin.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Former Units at DBM > Metabolism (Keller/Müller)
03 Faculty of Medicine > Bereich Medizinische Fächer (Klinik) > Ehemalige Einheiten Medizinische Fächer (Klinik) > Klinische Endokrinologie (Keller)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Medizinische Fächer (Klinik) > Ehemalige Einheiten Medizinische Fächer (Klinik) > Klinische Endokrinologie (Keller)
UniBasel Contributors:Keller, Ulrich O.
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Thomas
ISSN:0021-972X
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:04 Sep 2015 14:32
Deposited On:04 Sep 2015 14:32

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