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Psychophysiological Assessment of the Effectiveness of Emotion Regulation Strategies in Childhood
Published on: February 11, 2017
Gene-environment interaction of child temperament
Jose Luis Ivorra1, Julio Sanjuan, Manuel Jover
1Department of Genetics, Faculty of Medicine, Valencia University, Spain.
Journal of Developmental and Behavioral Pediatrics : JDBP
|August 24, 2010
Summary
Maternal anxiety influences infant irritability, particularly in infants with the 5-HTTLPR s allele. The 5-HTTLPR polymorphism moderates this effect, highlighting genetic links in early child development.
Area of Science:
- Child Psychology
- Molecular Genetics
- Developmental Neuroscience
Background:
- Child temperament is influenced by genetic and environmental factors.
- The serotonin transporter gene (5-HTT) and its polymorphisms are implicated in behavioral regulation.
- Maternal emotional state is a critical environmental factor impacting infant development.
Purpose of the Study:
- To review molecular genetics studies on child temperament.
- To prospectively analyze infant temperament in relation to maternal emotional state and specific gene polymorphisms (5-HTT, DRD4, MAO-A).
Main Methods:
- A prospective study of 317 mother-infant dyads.
- Infant temperament and maternal emotional state (anxiety, confidence) assessed at 8 and 32 weeks postpartum.
- Genotyping for 5-HTT (5-HTTLPR, Stin2), DRD4, and MAO-A polymorphisms in infants and mothers.
Main Results:
- Infant irritability showed a linear association with maternal anxiety in infants carrying the 5-HTTLPR s allele at both 8 and 32 weeks.
- Infants with the 5-HTTLPR ll genotype exhibited irritability independent of maternal anxiety levels.
Conclusions:
- The 5-HTTLPR polymorphism plays a moderating role in the relationship between maternal anxiety and infant irritability.
- This finding supports the gene-environment interaction model in early temperament development.
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