Stimulation of Endocrine but Not Exocrine Pancreatic Secretion During 2DeoxydGlucoseInduced Neuroglycopenia in the Conscious Pig

The effects of autonomic nervous activation, initiated by 2-deoxy-d-glucose (2-DG)-induced neuroglycopenia, on endocrine and exocrine pancreatic secretion were investigated in the conscious pig. Pigs were surgically fitted with permanent pancreatic duct and duodenal reentrant cannulas, allowing long-term sampling of pancreatic juice, and a jugular vein catheter for blood sampling and infusion of 2-DG. 2-DG was administered as a 5-min intravenous infusion at three dose levels to conscious pigs. 2-DG (400 mg/kg) was found to elevate plasma glucagon and insulin levels (p < 0.01). In contrast, exocrine pancreatic secretion, measured as volume, total protein output, and output of trypsin activity was not affected by 2-DG at the dose levels of 75, 200, and 400 mg/kg. Secretin (440 pmol/kg/h), however, stimulated pancreatic exocrine output of fluid (p < 0.01). protein (p < 0.01). and trypsin (p < 0.05). It is concluded that autonomic nervous activation by 2-DG-induced neuroglycopenia, in the conscious pig under basal conditions, elevates the plasma levels of glucagon and insulin but does not affect exocrine pancreatic secretion. 2-DG-induced neuroglycopenia is, thus, a suitable model for studying autonomic neural influences on the porcine endocrine pancreas.