Elevated brain serotonin turnover in patients with depression: effect of genotype and therapy

Archives of General Psychiatry
David A BartonGavin W Lambert

Abstract

The biological basis for the development of major depressive disorder (MDD) remains incompletely understood. To quantify brain serotonin (5-hydroxytryptamine [5-HT]) turnover in patients with MDD. Patients with depression were studied both untreated and during administration of a selective serotonin reuptake inhibitor (SSRI) in an unblinded study of sequential design. Healthy volunteers were examined on only 1 occasion. Direct internal jugular venous blood sampling was used to directly quantify brain serotonin turnover. The effect of serotonin transporter (5-HTT) genotype on brain serotonin turnover was evaluated and the influence of SSRI therapy on serotonin turnover was investigated. Participants were recruited from the general community following media advertisement. Experimental procedures were performed in the research catheterization laboratory of a major training hospital and medical research institute. Studies were performed in 21 patients fulfilling the DSM-IV and International Statistical Classification of Diseases, 10th Revision diagnostic criteria for MDD and in 40 healthy volunteers. Treatment for patients consisted of SSRI administration for approximately 12 weeks. Brain serotonin turnover before and after SSRI th...Continue Reading

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