PMID: 2475982Jun 1, 1989

Exocrine pancreatic response to isoproterenol in the rabbit under secretin and CCK stimulation

Zeitschrift für Gastroenterologie
I De DiosM A Lopez

Abstract

The effect of isoproterenol (0.3 micrograms/Kg/min) on exocrine pancreatic secretion stimulated by secretin (1. C.U./Kg/h) and the octapeptide of cholecystokinin (OP-CCK 0.15 Ivy dog units/Kg/h) was studied in anaesthetized rabbits. Pancreatic blood flow remained unaffected by the action of isoproterenol; however, the administration of the beta-adrenergic agonist over an infusion of secretion an OP-CCK led to an increase in pancreatic juice flow (approximately 146% for secretin and 125% for OP-CCK) and HCO3-output (approximately 194% for secretin and 150% for OP-CCK), a potentiation being observed between the effects of secretin and isoproterenol. This kind of response, independent of vascular changes, is due to a direct action of isoproterenol on the ductular cells. Isoproterenol interferes with the action of secretin and OP-CCK in that it partially inhibits the stimulatory action of OP-CCK on the enzymatic secretion of the acinar cells in the rabbit pancreas and at the same time protein secretion decreases in the presence of secretin.

Related Concepts

Cholecystokinin
Pancreatic Secretion Function
Blood Vessel
Cholecystokinin Measurement
Benign Tumor of Pancreas
Secretin Measurement
Adrenergic beta-Agonists
Secretory Rate
Blood Flow
Protein Secretion

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