title: [Association of 5-HT(2A) receptor polymorphism and attention deficit hyperactivity disorder in children].
abstract: OBJECTIVE
  To stude the association of 5-HT(2A) receptor polymorphism and attention deficit hyperactivity disorder (ADHD) in children.
  
  
  METHODS
  Blood samples were taken from 323 6 approximately 17.5-year-old children with ADHD disgnosed based on the DSM-IV criteria, 182 healthy 18 approximately 49-year-old controls, and 195 pairs of parents of affected children, all of Han nationality. DNA was extracted. PCR was performed to examine the 5-hydroxytryptamine (5-HT)(2A) receptor T102C polymorphism. Transmission disequilibrium test (TDT) was used to test the association of alleles of 5-HT(2A) T102C polymorphic sites and AFDHD.
  
  
  RESULTS
  The frequency of T102T in patients with ADHD combined subtype was lower than that in the controls (22.35 vs 33.5%, OR = 0.569, P = 0.028, 95% CI 0.344 - 0.943), and the frequency of T102C in patients with ADHD combined subtype was higher than that in the controls (64.0% vs 47.3%, OR = 1.987, P = 0.003, 95% CI 1.264 approximately 3.124). TDT showed biased transmission of the alleles of T102C polymorphism among families of girl patients with ADHD combined subtype (P = 0.031).
  
  
  CONCLUSIONS
  For the ADHD combined subtype, the T102T genotype is a protective factor and the T102C genotype is a risk factor. For the girl with ADHD combined subtype, the allele C102 is a disease-predisposing gene.
authors.affiliation: Peking University Institute of Mental Health, Beijing 100083, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Wang
authors.forename: Qiujin
authors.initials: Q
authors.lastname: Qian
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.forename: Rulun
authors.initials: R
authors.lastname: Zhou
mesh_terms: D000293:Adolescent; D000483:Alleles; D019943:Amino Acid Substitution; D001289:Attention Deficit Disorder with Hyperactivity / Q000235:genetics*; D002648:Child; D004247:DNA / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D044402:Receptor, Serotonin, 5-HT2A; D011985:Receptors, Serotonin / Q000235:genetics*
chemical_list: D044402:Receptor, Serotonin, 5-HT2A; D011985:Receptors, Serotonin; D004247:DNA