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  • Title: Insulinotropic action of human glicentin in dogs.
    Author: Ohneda A, Ohneda K, Nagasaki T, Sasaki K.
    Journal: Metabolism; 1995 Jan; 44(1):47-51. PubMed ID: 7854165.
    Abstract:
    Glicentin has been demonstrated to be released in response to the intraluminal administration of nutrients, but its biological action remains unknown. To clarify the effect of glicentin on the endocrine function of the pancreas, the present study was performed using an in vivo local circulation system of the canine pancreas. During infusion of 0.5% solution of glucose or arginine, 100 and 400 pmol glicentin and 400 pmol glucagon were administered into the pancreaticoduodenal artery (PA) within 10 minutes at 40-minute intervals successively. During glucose infusion, blood glucose in the femoral artery did not change following administration of 100 pmol glicentin, but slightly increased following 400 pmol glicentin. Plasma insulin (immunoreactive insulin [IRI]) in the pancreaticoduodenal vein (PV) increased significantly only following infusion of 400 pmol glicentin. Plasma glucagon (immunoreactive glucagon [IRG]), measured with a specific antiserum to the C-terminal portion of glucagon, did not change following administration of 100 pmol glicentin, but was slightly elevated following 400 pmol glicentin. Plasma total IRG, measured with a nonspecific antiserum, increased promptly after administration of 100 and 400 pmol glicentin. During arginine infusion, the response of plasma IRI to glicentin was markedly exaggerated both in dosages of 100 and 400 pmol. From the present study it was concluded that human glicentin clearly increases insulin release from the canine pancreas.
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