dopaminergic as well as serotoninergic neurons are involved in the mediation of the action of ha , since the dopamine ( da ) concentration in the pituitary portal vessels is decreased by central or systemic infusion of ha , and since blockade of da synthesis and of da or serotonin ( 5-ht ) receptors inhibit or prevent the prl stimulatory action of ha infused centrally or systemically .
C0282151
dopaminergic
C0013030
da