Increased low-affinity 3H-spiroperidol binding to rat cortical membranes after chronic antidepressant treatments

Abstract

Looking for receptor correlates of increased motor response to dopaminergic stimulation in rats after antidepressant treatments, we measured specific 3H-spiroperidol binding to membranes from various brain ureas in rats receiving chronically electroconvulsive shock (ECS), imipramine or trazodone. In all groups the low-affinity 3H-spiroperidol binding (KD approximately 3 nM) was increased in the cortex, but not in the subcortical areas.