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  • Title: Effect of intraluminal administration of amino acids upon plasma glicentin.
    Author: Ohneda A, Kobayashi T, Nihei J, Takahashi H.
    Journal: Diabetes Res Clin Pract; 1988 Oct 14; 5(4):265-70. PubMed ID: 3069408.
    Abstract:
    To see what effect intraluminal amino acids would have on glicentin secretion, we put a mixture of 10 amino acids (1 g/kg) into the duodenum of five normal, conscious piglets. Their plasma nitrogen rose, as did insulin and glucagon measured with C-terminal-specific antiserum. Plasma total immunoreactive glucagon, determined with non-specific antiserum, rose from 2753 +/- 460 pg/ml to a peak of 4434 +/- 1352 pg/ml at 30 min. Plasma glicentin, determined with R 64 antiserum, rose from a fasting level of 297 +/- 70 pmol/l to a peak of 702 +/- 167 pmol/l at 45 min. We also gave oral arginine to 6 pancreatectomized dogs to investigate why the plasma glicentin rises after amino acid ingestion. Arginine raised the plasma total immunoreactive glucagon from 1120 +/- 214 pg/ml to a peak of 2266 +/- 512 pg/ml at 45 min. We conclude that intraluminally administered amino acids enhance glicentin secretion from the gut.
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