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  • Title: Serotonin transporter gene polymorphisms: effect on serotonin transporter availability in the brain of suicide attempters.
    Author: Bah J, Lindström M, Westberg L, Mannerås L, Ryding E, Henningsson S, Melke J, Rosén I, Träskman-Bendz L, Eriksson E.
    Journal: Psychiatry Res; 2008 Apr 15; 162(3):221-9. PubMed ID: 18314311.
    Abstract:
    The efficacy of serotonin reuptake inhibitors in depression and anxiety disorders suggests the gene coding for the serotonin transporter (5-HTT), SLC6A4, as a candidate of importance for these conditions. Positive findings regarding associations between polymorphisms in SLC6A4 have been reported, indicating that these polymorphisms may influence anxiety-related personality traits, as well as the risk of developing depression and suicidality. Serotonin 5-HTT availability was assessed with single photon emission computed tomography (SPECT), using (123)I-beta-CIT as ligand, in a population of unmedicated male suicide attempters (n=9) and in matched controls (n=9). Two polymorphisms in SLC6A4 were assessed, including the 5-HTTLPR located in the promoter region and a variable number of tandem repeats (VNTR) polymorphism in intron 2 (STin2). In suicide attempters, but not in controls, low 5-HTT availability was associated with the S allele of 5-HTTLPR and with the 12 repeat allele of STin2. Data suggest that polymorphisms in SLC6A4 may influence the expression of the brain serotonin transporter in suicide attempters.
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