Serotonin-transporter-linked promoter region polymorphism and serotonin transporter binding in drug-naïve patients with major depression

Psychiatry and Clinical Neurosciences
Mikko JoensuuJohannes Lehtonen

Abstract

Both the serotonin transporter and its genetic regulation by the serotonin-transporter-linked polymorphic region have a role in the pathophysiology of depression. Most of the previous studies have found no influence of serotonin-transporter-linked polymorphic region allelic variation on serotonin transporter binding in healthy controls or patients with major depression. Due to the inconsistency of the previous findings, we compared single photon emission computed tomography imaging with the serotonin-transporter-linked polymorphic region genotype in patients with major depressive disorder. A total of 23 drug-naïve patients with major depressive disorder were genotyped and brain imaged with ([123I])nor-beta-CIT single photon emission computed tomography. The severity of depression was evaluated with the 17-item Hamilton depression rating scale. Depressed patients homozygous for the short allele had lower ([123I])nor-beta-CIT binding in the medial prefrontal cortex, but not in the midbrain, compared with the other genotypes. The decreased medial prefrontal cortical serotonin transporter binding in the patients homozygous for the short allele may be linked to altered function of the serotonin-transporter-linked polymorphic region ...Continue Reading

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Citations

Sep 4, 2012·Journal of Applied Genetics·Dimitry A ChistiakovVladimir P Chekhonin
Jun 16, 2012·Psychiatry Research·Andrew B NewbergJustine Shults
Jun 12, 2013·Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging·Jay D AmsterdamIrene Soeller
Aug 28, 2015·Psychiatry and Clinical Neurosciences·Mikko JoensuuJohannes Lehtonen

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