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Published on: August 4, 2022
Candidate gene associations with withdrawn behavior
David H Rubin1, Robert R Althoff, Erik A Ehli
1Weill-Cornell Medical College, New York, NY, USA.
Summary
Social withdrawal, a key trait in developmental psychopathology, is linked to serotonin receptor 2A (HTR2A) and alpha 2-adrenergic (ADRA2A) genes. These findings highlight the genetic underpinnings of withdrawn behavior in children.
Area of Science:
- Neuroscience
- Genetics
- Developmental Psychology
Background:
- Social withdrawal is a significant indicator of various psychiatric conditions, including depression, autism, and anxiety.
- This behavior is highly heritable, persistent, and often worsens without intervention.
- Previous genetic studies have been limited by the use of categorical measures for this phenotype.
Purpose of the Study:
- To investigate the genetic associations with a dimensional measure of social withdrawal.
- To identify specific candidate genes linked to withdrawn behavior.
Main Methods:
- Analysis of 20 single-nucleotide polymorphisms (SNPs) and 4 variable number of tandem repeat (VNTR) genes in 551 individuals from 187 families.
- Utilized linear mixed modeling to assess the relationship between genotypes and the Child Behavior Checklist (CBCL) Withdrawn Behavior Subscale Score (WBS).
- Controlled for gender and age using multiple linear regressions.
Main Results:
- Significant associations were found between withdrawn behavior and polymorphisms in the serotonin receptor 2A (HTR2A) gene (rs6314) and the alpha 2-adrenergic (ADRA2A) gene (rs1800544).
- The association with ADRA2A was more pronounced in younger children.
- These findings were robust after correcting for gender and age.
Conclusions:
- The serotonin receptor 2A (HTR2A) and alpha 2-adrenergic (ADRA2A) genes are significantly associated with social withdrawal.
- This study supports the role of catecholaminergic genes in the heritability of withdrawn behavior.
- Dimensional measurement approaches are crucial for uncovering genetic links to complex behaviors.
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