elevation of serotonin concentration in brain with either 5-hydroxytryptophan ( a serotonin precursor ) or chlorimipramine ( an inhibitor of serotonin reuptake ) , although causing no changes in vasodepressor reuptake ) , although causing no changes in vasodepressor response , did enhance the pge1-induced bradycardia in contrast , depleting serotonin concentration in brain with either p-chlorophenylalanine or 5,7-dihydroxytryptamine greatly reduced the pge1-induced bradycardia without changes in vasodepressor response .
C0086045
concentration
C0006104
brain