A functional NPSR1 gene variant and environment shape personality and impulsive action: a longitudinal study

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Neuropeptide S and its receptor NPSR1 regulate arousal, attention, and anxiety.
• The NPSR1 gene harbors a functional polymorphism, Asn¹⁰⁷Ile (rs324981, A>T), with potential implications for behavior.

Purpose of the Study:

• To investigate the influence of the NPSR1 A/T polymorphism on personality, impulsivity, and ADHD symptoms.
• To determine if these associations are modulated by age, sex, family environment, and stressful life events (SLE).

Main Methods:

• Utilized data from the longitudinal Estonian Children Personality, Behaviour and Health Study (n=1176).
• Employed self-reports and teacher ratings to assess personality, impulsivity, ADHD symptoms, family warmth, and SLE exposure.
• Genotyped the NPSR1 Asn¹⁰⁷Ile polymorphism (rs324981, A>T).

Main Results:

• Males with the TT genotype showed higher ADHD-related symptoms.
• Personality traits like adaptive impulsivity and extraversion changed significantly between ages 18 and 25, with genotype- and sex-specific patterns.
• Family warmth was associated with personality traits in the AA genotype group.
• High SLE exposure exacerbated impulsivity and ADHD symptoms in TT genotype individuals.

Conclusions:

• The NPSR1 A/T polymorphism is linked to variations in impulsivity, ADHD symptoms, and personality traits.
• Genetic variations in NPSR1 affect individual sensitivity to environmental factors, with heterozygous individuals showing the least environmental sensitivity.