title: Association of polymorphisms of the serotonergic pathways with clinical traits of impulsive-aggression and suicidality in adolescents: a multi-center study.
abstract: OBJECTIVE
  Suicidal behaviour runs in families. This study evaluated association between common polymorphisms in the serotonergic and adrenergic candidate genes (HTR2A, 5HTTLPR, and MAOA) and suicidality, psychopathology and aggression in adolescents.
  
  
  METHODS
  Four groups of adolescents were included: Suicidal (N=35) and non-suicidal (N=30) psychiatric inpatients, suicide attempters admitted to three psychiatric emergency rooms (N=51) and a community-based control group (N=95). All were genotyped and underwent psychological assessment for relevant endophenotypes and plasma serotonin content (p5HT) was measured.
  
  
  RESULTS
  Homozygosity for the T allele of the HTR2A 102T/C polymorphism was associated with lower impulsivity (P=0.03) and aggression (P=0.01) compared to TC carriers. Low activity MAOA genotypes were associated with suicidality (P=0.04). No association was found between p5HT level and the examined polymorphisms.
  
  
  CONCLUSIONS
  Our findings are in line with the associations described in adult suicidal population. Further studies are needed to evaluate the gene ? environmental interactions in larger samples in an attempt to clarify the possible role of genetic factors in pediatric suicidal and impulsive-aggressive behaviour.
authors.affiliation: Child and Adolescent Psychiatry Division, Geha Mental Health Center, Petach Tikva, Israel. zalsman@post.tau.ac.il
authors.forename: Gil
authors.initials: G
authors.lastname: Zalsman
authors.forename: Miriam
authors.initials: M
authors.lastname: Patya
authors.forename: Amos
authors.initials: A
authors.lastname: Frisch
authors.forename: Hadas
authors.initials: H
authors.lastname: Ofek
authors.forename: Lior
authors.initials: L
authors.lastname: Schapir
authors.forename: Ilana
authors.initials: I
authors.lastname: Blum
authors.forename: Daniella
authors.initials: D
authors.lastname: Harell
authors.forename: Alan
authors.initials: A
authors.lastname: Apter
authors.forename: Abraham
authors.initials: A
authors.lastname: Weizman
authors.forename: Samuel
authors.initials: S
authors.lastname: Tyano
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology; D000328:Adult; D000374:Aggression / Q000523:psychology*; D005260:Female; D020022:Genetic Predisposition to Disease / Q000235:genetics; D006801:Humans; D007175:Impulsive Behavior / Q000097:blood / Q000235:genetics* / Q000523:psychology; D007557:Israel; D008297:Male; D008995:Monoamine Oxidase / Q000097:blood / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics; D044348:Receptors, Serotonin, 5-HT2 / Q000097:blood / Q000235:genetics*; D050486:Serotonin Plasma Membrane Transport Proteins / Q000097:blood / Q000235:genetics*; D013406:Suicide, Attempted / Q000523:psychology* / Q000706:statistics & numerical data; D055815:Young Adult
chemical_list: D044348:Receptors, Serotonin, 5-HT2; D050486:Serotonin Plasma Membrane Transport Proteins; D008995:Monoamine Oxidase