Summary
The radioactive adenosine 3′,5′-monophosphate (cyclic AMP) level derived from 8-14C adenine in intact rabbit platelets decreased in the presence of mitochondrial inhibitor
(potassium cyanide) or uncoupler (sodium azide), and markedly increased by the addition
of NaF, monoiodoacetic acid (MIA), or 2-deoxy-D-glucose. The stimulative effect of
the glycolytic inhibitors was distinctly enhanced by the simultaneous addition of
sodium succinate. MIA did neither directly stimulate the adenyl cyclase activity nor
inhibit the phosphodiesterase activity. These results suggest that cyclic AMP synthesis
in platelets is closely linked to mitochondrial oxidative phosphorylation.