title: [Association analysis between attention-deficit hyperactivity disorder and Val158Met polymorphism of catechol-O-methyltransferase gene].
abstract: OBJECTIVE
  To investigate the association between attention-deficit hyperactivity disorder (ADHD) in Han Chinese children and Val158Met polymorphism of catechol-O-methyltransferase (COMT) gene caused by the missense mutation of G158A in exon 4.
  
  
  METHODS
  By using polymerase chain reaction-restriction fragment length polymorphisms the Val158Met polymorphism of COMT gene was tested in 117 children with the diagnosis of ADHD as defined by DSM-IV and in 105 healthy controls living in Shanghai.
  
  
  RESULTS
  The frequencies of A allele were 25.21% and 23.81% in the ADHD group and the health controls respectively, which showed no significant difference between the two groups (Chi2=0.5197, P>0.05). There was also no significant difference in the distribution of all genotypes of COMT gene between the ADHD patients and the controls (P>0.05).
  
  
  CONCLUSIONS
  It was suggested that for the Han Chinese children with ADHD in this study, there was no association between ADHD and Val158Met polymorphism of COMT gene.
authors.affiliation: Department of Genetics, School of Medicine, Ningbo University, Ningbo, Zhejiang, 315211 PR China. zhangxianning@nbu.edu.cn
authors.forename: Xian-ning
authors.initials: XN
authors.lastname: Zhang
authors.forename: Lie-min
authors.initials: LM
authors.lastname: Ruan
authors.forename: Yan-ping
authors.initials: YP
authors.lastname: Le
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000201:enzymology / Q000235:genetics*; D002394:Catechol O-Methyltransferase / Q000235:genetics*; D002648:Child; D005091:Exons / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics; D006801:Humans; D008297:Male; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide
chemical_list: D002394:Catechol O-Methyltransferase