Inhibition by Somatostatin of Gastrin Release and Gastric Acid Responses to Meals and to Pentagastrin in Man
- 1 May 1977
- journal article
- research article
- Published by Taylor & Francis in Scandinavian Journal of Gastroenterology
- Vol. 12 (3), 261-265
- https://doi.org/10.3109/00365527709180926
Abstract
The inhibitory actions of intravenous somatostatin on the gastric secretory responses to pentagastrin (1.5 μg/kg-h i.v.) and to a meal (10% peptone, pH 5.5) were studied in six healthy subjects. Meal-induced gastric acid output was estimated by means of a modified Fordtran and Walsh method of intragastric titration. Somatostatin (5 μg/kg-h; cyclic form) significantly inhibited the total 1-hour acid response to pentagastrin by about 70% (inhibition of pepsin secretion: about 70%) and that to a test meal by about 75%. During the last 30 min of somatostatin infusion the pentagastrin-stimulated secretion of acid was significantly reduced by about 90% (inhibition of pepsin output: about 85%) while the corresponding figure in the test with meal-induced secretion was about 95%. Serum gastrin - elevated in response to the test meal - was found to be merely lowered by about 30% during somatostatin infusion. Consequently, it is tempting to assume that inhibition of human gastric acid secretion by exogenous somatostatin largely results from a direct antisecretory effect upon parietal cells and, only to a minor extent, from an indirect action via reduction of gastrin release.Keywords
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