however its inhibitory effect on the above basal , insulin-stimulated fraction of hexose transport was not mediated by cyclic amp since : ( i ) 8-bromo cyclic amp and cholera toxin did not mimic this effect of the diterpene , ( ii ) significant decreases in cyclic amp levels caused by 2',3'-dideoxyadenosine in the presence of forskolin did not prevent inhibition of insulin-stimulated hexose transport , ( iii ) isobutylmethylxanthine did not potentiate forskolin effects on glucose transport but did potentiate the elevation in cyclic amp , and ( iv ) 1,9-dideoxyforskolin , which does not activate adenylate cyclase , inhibited hexose transport analogously to forskolin .
C0000661
8-bromo cyclic amp
C0001455
cyclic amp