Recent developments in the genetics of attention-deficit hyperactivity disorder

Area of Science:

• Genetics
• Neuroscience
• Psychiatry

Background:

• Attention-deficit hyperactivity disorder (ADHD) is a common developmental psychiatric disorder with a significant genetic component.
• Familial, twin, and SNP-based studies confirm a strong hereditary basis for ADHD in both children and adults.

Purpose of the Study:

• To provide an updated review of recent genetic insights into the etiology of ADHD.
• To explore findings from genome-wide association studies (GWAS) and bioinformatic analyses.

Main Methods:

• Review of recent genome-wide association studies (GWAS) examining common variants and copy number variations.
• Application of bioinformatic methods including functional enrichment analysis and protein-protein network analysis.
• Analysis of gene groups (functional ontologies) to identify affected gene networks.

Main Results:

• GWAS have identified common variants and rare copy number variations associated with ADHD.
• Functional ontologies suggest the involvement of neurodevelopmentally expressed gene networks.
• Copy number variations implicate pathways in synaptic signaling and neurodevelopment.
• Recent SNP-GWAS have identified the first whole-genome significant SNP for ADHD.

Conclusions:

• The genetic architecture of ADHD is complex, involving multiple common and rare variants.
• Bioinformatic approaches are crucial for understanding the biological pathways underlying ADHD.
• Further research is needed to elucidate the role of identified genetic factors in ADHD pathogenesis.