Acid-secretory effects of pentagastrin, histamine, urecholine, DBcAMP, and cBMP in isolated stomachs of fed and fasted rats.

Pentagastrin, histamine, urecholine, DBcAMP, and cGMP were all potent stimulants of acid secretion in the isolated stomach of the fed rat. With the exception of histamine and cGMP, all of these compounds were inactive when the stomach of the fasted rat was used. Pentagastrin was most effective when given on the serosal surface while histamine was equally potent whether it was added to the mucosal or serosal surface of the isolated stomach. The test would appear to be a relatively simply, but effective system for studying the basic mechanisms of action of several important secretagogues in the rat.