Abstract

The effect of dopamine (DA) on 3′,5′-cyclic adenosine monophosphate (cAMP) generation in the rabbit portal vein was investigated. Dopamine added to homogenates of rabbit portal vein increased the concentration of cAMP. DA-elicited cAMP increase was exclusively inhibited by DA antagonists fluphenazine and haloperidol suggesting the existence of DA receptors (of the DA 1 subtype) in the portal vein.

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