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Vagal modulation of arginine induced and glucagon induced pancreatic somatostatin secretion


, : Vagal modulation of arginine induced and glucagon induced pancreatic somatostatin secretion. Life Sciences 37(7): 651-656

In order to elucidate the role of the vagus nerve in the regulation of pancreatic somatostatin secretion, the effect of electrical stimulation of the vagus on the isolated perfused rat pancreas was studied. Stomatostatin release induced by 19 mM arg in the presence of 11 mM glucose or 10-6 M glucagon in the presence of 5.5 mM glucose was suppressed by vagal stimulation. This suppressive effect on somatostatin was eliminated in the presence of 10-5 M atropine plus glucagon, while somatostatin release was significantly enhanced in the presence of atropine plus arginine. Pancreatic somatostatin secretion may be regulaed not only by a cholinergic inhibitory neuron but also by a stimulatory non-cholinergic neuron.

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