Serotonin transporter occupancy with TCAs and SSRIs: a PET study in patients with major depressive disorder
نویسندگان
چکیده
The aim of the present clinical positron emission tomography study was to examine if the 5-HTT is a common target, both for tricyclic antidepressants (TCAs) and selective serotonin reuptake inhibitors (SSRIs). Serotonin transporter (5-HTT) occupancy was estimated during treatment with TCA, SSRI and mirtazapine in 20 patients in remission from depression. The patients were recruited from out-patient units and deemed as responders to antidepressive treatment. The radioligand [¹¹C]MADAM was used to determine the 5-HTT binding potential. The mean 5-HTT occupancy was 67% (range 28-86%). There was no significant difference in 5-HTT occupancy between TCA (n=5) and SSRI (n=14). 5-HTT affinity correlated with the recommended clinical dose. Mirtazapine did not occupy the serotonin transporter. The results support that TCAs and SSRIs have a shared mechanism of action by inhibition of 5-HTT.
منابع مشابه
From THE DEPARTMENT OF CLINICAL NEUROSCIENCE Karolinska Institutet, Stockholm, Sweden PET STUDIES OF THE SEROTONIN SYSTEM IN MAJOR DEPRESSION AND ITS TREATMENT
Cover picture: Summation PET images of an untreated reference subject (left) and of a patient treated with an SSRI (citalopram, right), after intravenous injection of [ 11 C]MADAM. All previously published papers were reproduced with permission from the publisher. ABSTRACT The serotonin system has been implicated in major depression since the 1960s, mainly based on the serotonin enhancing prope...
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