A dose-response study of the effect of 0.1–5.0 μg kg-1 h-1 somatostatin was performed on food-induced rise of pancreatic polypeptide and insulin in 4 dogs. There was a dose-dependent suppression of the release of pancreatic polypeptide and insulin with an ED50 of approximately 0.65 and 0.8 μg kg-1 h-1, respectively, during the first 45-min period. In the second 45-min period, high doses of somatostatin failed to suppress insulin concentrations whereas, the serum concentrations of pancreatic polypeptide were reduced by a similar degree as in the first 45 min. The differing effects of somatostatin on food-stimulated serum concentrations of insulin and pancreatic polypeptide indicate that somatostatin does not represent a uniform suppressor of pancreatic hormones.

Journal Section:
Original Paper
Keywords:
Somatostatin, Pancreatic polypeptide, Insulin, Pancreatic hormones, Dogs
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© 1982 S. Karger AG, Basel
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1982
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