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Exploring the interplay of dopaminergic genotype and parental behavior in relation to executive function in early

Daphne M Vrantsidis1, Caron A C Clark2, Auriele Volk3

  • 1Center for Biobehavioral Health, Nationwide Children's Hospital, Columbus, OH, USA.

Development and Psychopathology
|November 15, 2021
PubMed

Insights

Children with more reward-sensitive gene alleles may struggle with self-control when exposed to high maternal negative reactivity, suggesting a diathesis-stress model for behavior problems.

Area of Science:

  • Developmental Psychology
  • Behavioral Genetics
  • Neuroscience

Background:

  • Child genotype influences sensitivity to parental behavior.
  • Dopaminergic genes play a role in reward sensitivity and executive function.
  • Understanding gene-environment interactions is crucial for child development.

Purpose of the Study:

  • To investigate interactions between a dopaminergic polygenic composite and maternal behavior in relation to young children's executive function.
  • To explore how genetic predispositions interact with environmental factors like maternal reactivity.
  • To examine the impact on self-control and working memory/inhibitory control.

Main Methods:

  • A prospective longitudinal cohort study of 135 mother-child dyads at 36 months.
  • Creation of a polygenic composite score based on alleles in COMT, DAT1, DRD2, and DRD4 genes.
  • Maternal negative reactivity and responsiveness coded from structured interactions; executive function assessed.

Main Results:

  • A significant interaction was found between the polygenic composite score and maternal negative reactivity for child self-control.
  • Higher maternal negative reactivity was linked to poorer self-control in children with higher polygenic composite scores (diathesis-stress).
  • This suggests genetic vulnerability to negative parenting impacts self-control development.

Conclusions:

  • Children with genetic profiles associated with higher reward sensitivity may be more susceptible to negative parenting.
  • Maternal negative reactivity can increase the risk for behavior problems through its association with poorer self-control in genetically vulnerable children.
  • Findings require replication in larger samples due to the current study's small size.

Keywords:
dopamineearly childhoodexecutive functiongene–environment interactionparenting

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