Abstract

Mice treated with a single electroconvulsive shock (ECS) daily for up to 3 days showed progressively enhanced head-twitch to 5-methoxy-N,N'-dimethyltryptamine 24 h after 1, 2 and 3 shocks. Injection of desmethylimipramine (DMI, 5 mg/kg) twice daily for up to 3.5 days progressively decreased head-twitch responses on days 2, 3 and 4. Cortical [ 3H]ketanserin binding was increased by ECS × 3 and decreased by 3.5 days DMI treatment. These data demonstrate that in mice antidepressant treatments produce rapid changes in central 5-HT 2 function.

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