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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 55 (1977), S. 475-479 
    ISSN: 1432-1440
    Keywords: Feed back regulation ; Insulin secretion ; C-peptide secretion ; C-peptide-radioimmunoassay ; Autoregulation ; Insulinsekretion ; C-Peptid-Sekretion ; C-Peptid-Radioimmunoassay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An 8 stoffwechselgesunden, freiwilligen Probanden wurde durch C-Peptidbestimmungen experimentell überprüft, ob hohe Seruminsulinkonzentrationen autoregulativ die Insulinsekretion hemmen. Dazu wurden intravenöse Glukose-Insulin-Belastungen sowohl mit einmaliger Bolus-Injektion als auch kontinuierlicher Infusion über 2 Std. durchgeführt. Außerdem wurde geprüft, ob hohe Insulinspiegel die Ansprechbarkeit der B-Zelle auf Sulfonylharnstoffgabe hemmen. Es zeigte sich, daß die Sekretion der B-Zelle nur von der aktuellen Blutzuckerkonzentration, nicht aber von der Höhe des Insulinspiegels gesteuert wird. Die sulfonylharnstoff-bedingte Stimulation der B-Zelle wird durch Insulin nicht negativ beeinflußt.
    Notes: Summary In eight normal weight healthy volunteers it was proved by C-peptide assay whether high concentrations of insulin in serum would suppress the secretion of insulin in an autoregulative manner. Insulin combined with glucose, therefore was given intravenously as a single bolus injection as well as an infusion over a period of two hours. Moreover it was proved whether high levels of insulin would suppress the reactivity of the B-cell to sulphonylurea administration. It was demonstrated that the secretion of the B-cell is regulated only by the concentration of the blood sugar, but not by the level of serum insulin. Likewise the stimulation of the B-cell by sulphonyl-urea administration is not suppressed by high concentrations of insulin.
    Type of Medium: Electronic Resource
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