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  • Title: Acetorphan, an enkephalinase inhibitor, decreases gastric secretion in cats.
    Author: Bado A, Chicau-Chovet M, Appia F, Dubrasquet M, Lecomte JM, Rozé C.
    Journal: Peptides; 1987; 8(1):89-93. PubMed ID: 3554169.
    Abstract:
    Acetorphan is an inhibitor of "enkephalinase" (EC 3.4.24.11) which has been shown to reduce in vivo and in vitro the degradation of enkephalins and other peptides. The effects of acetorphan on gastric secretion were studied in cats fitted with gastric fistulae and Heidenhain pouches. Acetorphan inhibited by 40-60% the acid secretion from the gastric fistulae after stimulation by submaximal doses of pentagastrin, histamine and 2 deoxy-D-glucose. These inhibitions were reduced or suppressed by naloxone. The meal-stimulated secretion from the fistulae was not changed after acetorphan. Acetorphan slightly and progressively reduced the pentagastrin-stimulated acid output from the Heidenhain pouches, and this effect was naloxone resistant. No change was found in the secretion from Heidenhain pouches under histamine stimulation, while meal-induced secretion of the pouches was increased by acetorphan, and this increase was not prevented by naloxone. Endogenous opioids probably exert an inhibitory regulatory control upon the gastric secretion of cats. In addition, non-opioid factors may be involved in the effect of acetorphan on meal-stimulated secretion.
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