Abstract

Canine gastric mucosal cyclic AMP content was determined at 1, 5, 30, 60, and 120 min after commencing a 2-hr continuous intravenous infusion of histamine of sufficient dose to elicit a brisk acid secretory response from the dog stomach. The increase in acid output was significant at 30 min and stabilized at the stimulated level for the duration of histamine infusion. By contrast, there was no significant increase in mucosal cyclic AMP content at any time of measurement. Our findings indicate that the acid secretory response of the canine stomach to histamine does not require prior accumulation of cyclic AMP in the mucosal tissue.

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