Tryptophan hydroxylase-2 gene variation influences personality traits and disorders related to emotional dysregulation.

@article{citeulike:1218257, abstract = {Variation in the tryptophan hydroxylase-2 gene (TPH2) coding for the rate-limiting enzyme of serotonin (5-HT) synthesis in the brain modulates responses of limbic circuits to emotional stimuli and has been linked to a spectrum of clinical populations characterized by emotional dysregulation. Here, we tested a set of common single nucleotide polymorphisms (SNPs) in and downstream of the transcriptional control region of TPH2 for association with personality traits and with risk for personality disorders in two cohorts comprising of 336 healthy individuals and 420 patients with personality disorders. Personality dimensions were assessed by the Tridimensional Personality Questionnaire (TPQ) and the revised NEO Personality Inventory (NEO-PI-R). Personality disorders were diagnosed with the Structured Clinical Interview of DSM-IV and were allocated to clusters A, B, and C. Individual SNP and haplotype analyses revealed significant differences in genotype frequencies between controls and cluster B as well as cluster C patients, respectively. In both patient groups, we observed overrepresentation of T allele carriers of a functional polymorphism in the upstream regulatory region of TPH2 (SNP G-703T, rs4570625) which was previously shown to bias responsiveness of the amygdala, a structure critically involved in emotionality. Furthermore, significant effects of TPH2 variants on anxiety-related traits defined primarily by the TPQ Harm Avoidance were found in healthy individuals. The results link potentially functional TPH2 variants to personality traits related to emotional instability as well as to cluster B and cluster C personality disorders. These findings implicate alterations of 5-HT synthesis in emotion regulation and confirm TPH2 as a susceptibility and/or modifier gene of affective spectrum disorders.}, address = {Molecular and Clinical Psychobiology, Department of Psychiatry and Psychotherapy, University of W\"{u}rzburg, W\"{u}rzburg, Germany.}, author = {Gutknecht, Lise and Jacob, Christian and Strobel, Alexander and Kriegebaum, Claudia and M\"{u}ller, Johannes and Zeng, Yong and Markert, Christoph and Escher, Andrea and Wendland, Jens and Reif, Andreas and M\"{o}ssner, Rainald and Gross, Cornelius and Brocke, Burkhard and Lesch, Klaus-Peter P. }, citeulike-article-id = {1218257}, doi = {http://dx.doi.org/10.1017/S1461145706007437}, issn = {1461-1457}, journal = {Int J Neuropsychopharmacol}, keywords = {serotonin, serotonin\_polymorphism, serotonin\_transporter, tph2}, month = {December}, pages = {1--12}, posted-at = {2007-04-09 21:35:00}, priority = {2}, title = {Tryptophan hydroxylase-2 gene variation influences personality traits and disorders related to emotional dysregulation.}, url = {http://dx.doi.org/10.1017/S1461145706007437}, year = {2006} }

TY - JOUR ID - citeulike:1218257 L3 - citeulike-article-id:1218257 TI - Tryptophan hydroxylase-2 gene variation influences personality traits and disorders related to emotional dysregulation. JF - Int J Neuropsychopharmacol SP - 1 EP - 12 AD - Molecular and Clinical Psychobiology, Department of Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany. SN - 1461-1457 N2 - Variation in the tryptophan hydroxylase-2 gene (TPH2) coding for the rate-limiting enzyme of serotonin (5-HT) synthesis in the brain modulates responses of limbic circuits to emotional stimuli and has been linked to a spectrum of clinical populations characterized by emotional dysregulation. Here, we tested a set of common single nucleotide polymorphisms (SNPs) in and downstream of the transcriptional control region of TPH2 for association with personality traits and with risk for personality disorders in two cohorts comprising of 336 healthy individuals and 420 patients with personality disorders. Personality dimensions were assessed by the Tridimensional Personality Questionnaire (TPQ) and the revised NEO Personality Inventory (NEO-PI-R). Personality disorders were diagnosed with the Structured Clinical Interview of DSM-IV and were allocated to clusters A, B, and C. Individual SNP and haplotype analyses revealed significant differences in genotype frequencies between controls and cluster B as well as cluster C patients, respectively. In both patient groups, we observed overrepresentation of T allele carriers of a functional polymorphism in the upstream regulatory region of TPH2 (SNP G-703T, rs4570625) which was previously shown to bias responsiveness of the amygdala, a structure critically involved in emotionality. Furthermore, significant effects of TPH2 variants on anxiety-related traits defined primarily by the TPQ Harm Avoidance were found in healthy individuals. The results link potentially functional TPH2 variants to personality traits related to emotional instability as well as to cluster B and cluster C personality disorders. These findings implicate alterations of 5-HT synthesis in emotion regulation and confirm TPH2 as a susceptibility and/or modifier gene of affective spectrum disorders. KW - serotonin KW - serotonin_polymorphism KW - serotonin_transporter KW - tph2 AU - Gutknecht, Lise AU - Jacob, Christian AU - Strobel, Alexander AU - Kriegebaum, Claudia AU - Müller, Johannes AU - Zeng, Yong AU - Markert, Christoph AU - Escher, Andrea AU - Wendland, Jens AU - Reif, Andreas AU - Mössner, Rainald AU - Gross, Cornelius AU - Brocke, Burkhard AU - Lesch, Klaus-Peter PY - 2006/12/19/ UR - http://dx.doi.org/10.1017/S1461145706007437 ER -