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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effect of growth hormone release-inhibiting hormone on gastric secretion, mucosal blood flow, and serum gastrin.

In dogs with gastric fistulae and Heidenhain pouches (HP) growth hormone release-inhibiting hormone (GH-RIH) infused intravenously in a dose of 2.5 mug per kg per hr inhibited almost completely acid and pepsin responses to pentagastrin, Urecholine, and a peptone. Histamine-induced acid secretion was more resistant to the inhibition by GH-RIH, and only acid secretion evoked by the lower doses of histamine was suppressed by this peptide. The inhibition of pentagastrin-induced gastric secretion was associated with a marked reduction in mucosal blood flow. The ratio of aminopyrine concentration in the gastric juice and blood plasma was not significantly changed by GH-RIH, indicating that the reduction in mucosal blood flow was secondary to an inhibition of gastric secretion. Gastric acid and serum gastrin responses to a peptone meal adjusted to pH 5.0 and kept in the main stomach at this same pH by intragastric titration were significantly decreased by GH-RIH, indicating that the observed acid inhibition could be attributed at least in part to the suppression of gastrin release. GH-RIH inhibited acid secretion from HP stimulated by liver extract in HP. The finding that GH-RIH inhibits gastric secretion induced by exogenous stimulants as well as by the direct chemical stimulation of the HP mucosa without changing serum gastrin level suggests that the major action of GH-RIH is a direct suppression of the oxyntic glands.[1]


  1. Effect of growth hormone release-inhibiting hormone on gastric secretion, mucosal blood flow, and serum gastrin. Konturek, S.J., Tasler, J., Cieszkowski, M., Coy, D.H., Schally, A.V. Gastroenterology (1976) [Pubmed]
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