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The effect of SST, glucagon, calcitonin and PGE1 on exocrine pancreatic secretion in the unrestrained dog in long-term experiments.

Using a new model of a reversible pancreatic fistula which allows the long-term-investigation under nearly physiological conditions on the unrestrained dog, we tested the effect of somatostatin (50 micrograms), calcitonin (4 micrograms), glucagon (1 microgram), and prostaglandin E1 (150 micrograms) on the exocrine pancreatic function in 45 experiments over a period of 13 h: SST inhibits the basal as well as the secretin or CCK-stimulated secretion: calcitonin shows inhibition of the stimulated secretion only; glucagon blocks the secretin-stimulated pancreatic function; and PGE1 reduces the bicarbonate concentration and trypsin output in secretin stimulation, but in one of the two series it stimulates the basal secretion.