Dopamine Transporter Gene and Dopamine D2, D3, D4 Receptor Gene Polymorphisms in Attention Deficit Hyperactivity Disorder

주의력결핍 과잉행동장애에서 도파민 전달체 및 도파민 D2, D3, D4 수용체 유전자 다형성

  • 박상필 (마인드필 의원) ;
  • 김대광 (계명대학교 의과대학 해부학교실) ;
  • 정철호 (계명대학교 의과대학 정신과학교실)
  • Published : 2008.02.28


Objectives : The aim of this study was to examine the association of attention-deficit hyperactivity disorder (ADHD) in Korean populations with functional polymorphisms of six genes dopamine receptors (Ser311/Cys311 polymorphism, Taq1 A polymorphism, and Taq1 B polymorphism in DRD2, BalI polymorphism in DRD3, and promoter -521 C/T polymorphism and exon III 48 bp repeat polymorphism in DRD4) and one gene in dopamine transporter (DAT1). Methods : Participants were 58 children with ADHD and 110 control children. The genotypes were determined by PCR. Results : There was a statistically significant difference in genotype frequency of -521 C/T polymorphism within the promoter region of the DRD4 between two groups. Furthermore, in the male group, both genotype and allele frequencies showed statistically significant differences. Conclusion : Findings of the study indicate that -521 C/T polymorphism in promoter region of DRD4 appears to be a possible candidate gene for ADHD in Korean population.