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Related Experiment Videos

Polymorphism of DRD2 gene and ADHD.

Omar Serý1, Ivana Drtílková, Pavel Theiner

  • 1Laboratory of neurobiology and molecular psychiatry, Department of Biochemistry, Masaryk University, Faculty of Science, Brno, Czech Republic. omarsery@sci.muni.cz

Neuro Endocrinology Letters
|May 2, 2006
PubMed
Summary

This study found that the TaqI A polymorphism of the dopamine receptor D2 (DRD2) gene is associated with childhood Attention Deficit Hyperactivity Disorder (ADHD) in boys. Specifically, allele A1 and genotype A1A1 are linked to ADHD pathogenesis.

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Area of Science:

  • Genetics
  • Neuroscience
  • Child Psychology

Background:

  • Attention Deficit Hyperactivity Disorder (ADHD) is a common childhood disorder with a strong hereditary component.
  • Genetic association studies are crucial for identifying markers linked to ADHD's genetic basis.
  • Previous research has suggested a link between the DRD2 gene and ADHD.

Purpose of the Study:

  • To investigate the association between the TaqI A polymorphism of the dopamine receptor D2 (DRD2) gene and ADHD in a cohort of boys.
  • To confirm or refute previous findings on the relationship between DRD2 TaqI A polymorphism and ADHD.

Main Methods:

  • An association study design was employed.
  • DNA was isolated from buccal tissue samples.
  • Genotyping was performed using Polymerase Chain Reaction (PCR) with restriction analysis.

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Main Results:

  • Statistically significant differences in genotypic and allelic frequencies of DRD2 polymorphism were observed between ADHD boys and control boys (p < 0.008 and p < 0.002, respectively).
  • The TaqI A polymorphism of the DRD2 gene, specifically allele A1 and genotype A1A1, was found to be associated with ADHD in male subjects.

Conclusions:

  • The findings support the involvement of the TaqI A polymorphism of the DRD2 gene in the pathogenesis of childhood ADHD among males.
  • This study reinforces previously published evidence linking DRD2 gene variations to ADHD.