ADHD and Disruptive Behavior: Gene Associations in Adolescents
Author Information
Author(s): Kerstin Malmberg, Hanna-Linn Wargelius, Paul Lichtenstein, Lars Oreland, Jan-Olov Larsson
Primary Institution: Karolinska Institutet
Hypothesis
Low platelet MAO-B activity is associated with high dimensions of the ADHD and DBD phenotype.
Conclusion
The study suggests that the serotonin system, in addition to the dopamine system, should be further investigated when studying genetic influences on the development of Disruptive Behavior Disorders.
Supporting Evidence
- Low platelet MAO-B activity was associated with higher levels of ODD symptoms in girls.
- The heterozygote 5-HTT LPR genotype in boys was associated with symptoms of Conduct Disorder.
- Boys with the short MAO-A allele were more likely to show disruptive behavior.
Takeaway
This study looked at how certain genes might be linked to ADHD and disruptive behaviors in teenagers, finding some interesting connections.
Methodology
The study assessed a population-based sample of twins for ADHD/DBD using clinical interviews and analyzed blood samples for platelet MAO-B activity and gene polymorphisms.
Potential Biases
There is a possibility of false positives in the associations reported due to reliance on clinical interviews.
Limitations
The study did not genotype the A/G SNP within the 5-HTT LPR, which may limit the findings.
Participant Demographics
The sample consisted of 247 adolescents (106 boys and 141 girls) with an average age of 16 years.
Statistical Information
P-Value
p = 0.047
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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