Stimulation of retinal adenylate cyclase by vasoactive intestinal peptide (VIP).

The effects of vasoactive intestinal peptide (VIP), secretin and glucagon on retinal adenylate cyclase were studied in rabbit, rat and calf retinas. The results demonstrate the presence of a highly active VIP sensitive adenylate cyclase in mammalian retina. The effects are not enhanced by the guanine nucleotide analog 5'-guanylylimidodiphosphate (Gpp(NH)p). Glucagon and secretin also caused significant increases in retinal adenylate cyclase activity although, in general, the magnitude of these effects was less than that of VIP.