Abstract
Rat glioma cells grown in culture secrete cyclic adenosine 3':5'-monophosphate (cyclic AMP) into the culture medium following stimulation by beta-agonistic catecholamines. Agents which reduced cellular ATP levels such as valinomycin, oligomycin, and uncouplers of oxidative phosphorylation, inhibited cyclic AMP efflux. Secretion of cyclic AMP was also prevented by prostaglandin A-1 and pharmacological agents including probenecid and papaverine. Of the latter agents, only papaverine reduced ATP levels. These results suggest that the transport of cyclic AMP across animal cell membranes is energy-dependent and subject to regulation.
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