Oxytocin pathway gene variation and corticostriatal resting-state functional connectivity

Area of Science:

• Neurogenetics
• Social Neuroscience
• Neuroimaging

Background:

• Single nucleotide polymorphisms (SNPs) in oxytocin pathway genes are associated with social behavior and neurodevelopmental conditions.
• The precise neurobiological mechanisms linking these genetic variations to social behavior are not well understood.

Purpose of the Study:

• To investigate the relationship between variations in 10 SNPs within oxytocin pathway genes and resting-state functional connectivity.
• To elucidate the neural underpinnings of how oxytocin-related genetic factors influence social behavior.

Main Methods:

• Utilized a large UK Biobank sample (N ≈ 30,000).
• Analyzed resting-state functional connectivity across 55 independent components.
• Examined genetic variations in 10 key oxytocin pathway SNPs.

Main Results:

• Individuals with the GG genotype at rs4813627 in the oxytocin (OXT) gene showed reduced resting-state functional connectivity in the corticostriatal circuit.
• This finding was compared to individuals with GA/AA genotypes at the same SNP.
• The OXT rs4813627 GG genotype has been previously associated with insensitivity to others.

Conclusions:

• Genetic variations in the oxytocin pathway, specifically at OXT rs4813627, are associated with altered functional brain connectivity.
• These findings provide insights into the neural mechanisms connecting oxytocin genetics to social behavior, particularly insensitivity.
• This study highlights the role of the corticostriatal circuit in mediating genetic influences on social cognition.