title: Association study of onset age, attempted suicide, aggressive behavior, and schizophrenia with a serotonin 1B receptor (A-161T) genetic polymorphism.
abstract: Located on the presynaptic and postsynaptic terminals of serotonergic neurons, serotonin 1B receptors (5-HT1B) are involved in the modulation of serotonergic activity. The implications of 5-HT1B study of animal models of schizophrenia and antipsychotic activity involving defective sensory processes suggest that this receptor may be involved in the pathogenesis of schizophrenic disorders. In a population-based association study, we tested the hypothesis that the allelic variant, A-161T, of the 5-HT1B gene confers susceptibility to schizophrenic disorders and is associated with age of onset, aggressive behavior and attempted suicide. We genotyped the A-161T polymorphism in 110 patients with schizophrenic disorders and in 215 normal controls. No association was demonstrated between 5-HT1B genotype or allele frequencies and schizophrenic disorders, except for a trend for later age at disease onset in A/A homozygote schizophrenics in comparison with A/T heterozygote patients (p = 0.071). No significant difference in genotype distribution was determined comparing patients with and without aggressive behavior, and those with and without a history of suicide attempt. These findings suggest that the investigated 5-HT1B genetic polymorphism does not play a major role in the pathogenesis of schizophrenic disorders.
authors.affiliation: Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
authors.forename: Chen-Jee
authors.initials: CJ
authors.lastname: Hong
authors.forename: Guo-Mei
authors.initials: GM
authors.lastname: Pan
authors.forename: Shih-Jen
authors.initials: SJ
authors.lastname: Tsai
mesh_terms: D000328:Adult; D017668:Age of Onset; D000374:Aggression; D000409:Alanine / Q000235:genetics; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic / Q000235:genetics*; D012333:RNA, Messenger / Q000096:biosynthesis; D044302:Receptor, Serotonin, 5-HT1B / Q000235:genetics*; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D012559:Schizophrenia / Q000150:complications / Q000235:genetics* / Q000503:physiopathology; D012565:Schizophrenic Psychology; D013406:Suicide, Attempted; D013912:Threonine / Q000235:genetics
chemical_list: D012333:RNA, Messenger; D044302:Receptor, Serotonin, 5-HT1B; D013912:Threonine; D000409:Alanine