Abstract

1. Effects of intravenous injections of ZSY-27, a synthesized phosphodiesterase inhibitor, on pancreatic exocrine secretion and on pancreatic cyclic AMP and cyclic GMP concentrations of dogs were investigated. 2. ZSY-27 (0.3 and 1 mg/kg) increased cyclic AMP concentration dose-dependently, which preceded the increase in pancreatic secretion but did not affect cyclic GMP concentration. 3. These results suggest that ZSY-27 causes exocrine secretion from the dog pancreas mediated through an increase in intracellular cyclic AMP concentration.

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