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  • Title: Proglumide antagonizes cholecystokinin effects on plasma glucose and insulin in rats in vivo.
    Author: Verspohl EJ, Wunderle G, Ammon HP.
    Journal: Eur J Pharmacol; 1988 Jul 26; 152(1-2):121-8. PubMed ID: 3208828.
    Abstract:
    Proglumide was shown to possess a low affinity for cholecystokinin (CCK) receptors and to inhibit the synergistic action of CCK8 on glucose-mediated insulin release in vitro. Proglumide (400 mg/kg i.p., given 15 min before an i.v. combination of CCK8 and glucose) reversed the CCK8 (0.5 nmol/kg)-induced increase of plasma insulin levels and decrease of glucose levels. It had no effect on plasma insulin and glucose levels when the glucose bolus was administered alone. Camostate (400 mg/kg p.o.; Foy-305; a trypsin inhibitor acting via endogenously released CCK) increased plasma insulin levels by 10 microU/ml during an oral glucose (500 mg/kg) tolerance test. Pretreatment with proglumide (400 mg/kg i.p.) antagonized this effect. The data indicate that proglumide has an antagonistic effect on either exogenously added or endogenously released CCK with respect to plasma insulin and glucose levels and that it has no effect on plasma insulin and glucose levels when glucose is given alone. Therefore, proglumide and the newly developed, more potent CCK receptor antagonists are able to disturb insulin and glucose homoeostasis.
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