• 1 January 1976
    • journal article
    • research article
    • Vol. 2  (3) , 171-178
Abstract
Acetylcholine (1 .mu.M) increased cyclic GMP content in paced perfused rat hearts within 15 s, with peak content occurring at 1 min. No effect of acetylcholine on cyclic AMP content, phosphorylase activity or glycogen synthase was observed. Epinephrine (1 .mu.M) infusion increased both cyclic AMP content and phosphorylase but did not alter cyclic GMP content or glycogen synthase activity. When acetylcholine was infused during the 2nd min of a 2 min infusion of epinephrine, the cholinergic agent increased cyclic GMP and reduced the stimulated phosphorylase activity and elevated cyclic AMP.