title: [Cases-Control association study and transmission disequilibrium test of T102C polymorphism in 5HT2A and Tourette syndrome].
abstract: OBJECTIVE
  To investigate whether T102C polymorphism in 5HT2A (serotonin receptor 2A) is associated with Tourette syndrome.
  
  
  METHODS
  Both case-control association analysis and Transmission Disequilibrium Test(TDT), in addition to polymerase chain reaction and RFLP technique were used in 157 trios with Tourette syndrome (TS) and 120 controls. A semi-structured "Schedule for Tourette and other behavioral syndrome" was used in family history-collecting. Both the criteria of "Diagnostic and Statistical Manual of Mental Disorders"(DSM-IV) and that of Tourette syndrome association (TSA) were used in the diagnosis of Tourette syndrome and related disorders.
  
  
  RESULTS
  The association between T102C polymorphism in 5HT2A and Tourette syndrome comorbided with obsessive compulsive disorder (OCD) was found by genotype-wise analysis (chi(2)=8.38,P=0.004) and allele-wise analysis (chi(2)=4.84,P=0.028), which was further confirmed by TDT analysis (chi(2)=5.12,P=0.02). No evidence of association or transmission disequilibrium between 102T/C polymorphism in 5HT2A and this disease in pure TS and total TS sample was found.
  
  
  CONCLUSIONS
  102T/C polymorphism in 5HT2A is exclusively associated with Tourette syndrome comorbided with DSM-IV OCD, which may constitute an independent subtype of Tourette syndrome.
authors.affiliation: Institute of Mental Health, the First University Hospital, West China University of Medical Sciences, Chengdu, Sichuan, 610041 P.R. China. cdwangyun@mail.sc.cninifo.net
authors.forename: Y
authors.initials: Y
authors.lastname: Huang
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: T
authors.initials: T
authors.lastname: Li
authors.forename: L
authors.initials: L
authors.lastname: Guo
authors.forename: X
authors.initials: X
authors.lastname: Sun
authors.forename: X
authors.initials: X
authors.lastname: Xiao
authors.forename: X
authors.initials: X
authors.lastname: Ma
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: D A
authors.initials: DA
authors.lastname: Collier
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009771:Obsessive-Compulsive Disorder / Q000235:genetics*; D011110:Polymorphism, Genetic; D044402:Receptor, Serotonin, 5-HT2A; D011985:Receptors, Serotonin / Q000235:genetics*; D005879:Tourette Syndrome / Q000235:genetics*
chemical_list: D044402:Receptor, Serotonin, 5-HT2A; D011985:Receptors, Serotonin