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The association between serotonin-related gene polymorphisms and panic disorder
Ho-Kyoung Yoon1, Jong-Chul Yang, Heon-Jeong Lee
1Department of Psychiatry, College of Medicine, Korea University, Republic of Korea.
Journal of Anxiety Disorders
|April 26, 2008
Summary
Genetic variations in the serotonin 2A receptor gene are linked to panic disorder symptom severity. While not directly causing panic disorder, these 5-HT2A receptor (5HTR2A) gene polymorphisms influence how severe panic symptoms become.
Area of Science:
- Neuroscience
- Genetics
- Psychiatry
Background:
- Serotonergic system dysfunction is implicated in panic disorder (PD).
- The serotonin 2A receptor (5HTR2A) and tryptophan hydroxylase (TPH) genes are key components of this system.
Purpose of the Study:
- To investigate the association between specific 5HTR2A and TPH gene polymorphisms and panic disorder.
- To determine if these genetic variations correlate with the severity of panic disorder symptoms.
Main Methods:
- Genotyping of 107 PD patients and 161 controls for 5HTR2A 1438A/G, 5HTR2A 102T/C, and TPH218 A/C polymorphisms.
- Assessment of symptom severity using validated scales: STAI, PDSS, ASI, API, and HAMD.
Main Results:
- No significant differences in genotype or allele frequencies were found between PD patients and controls for the studied polymorphisms.
- Significant differences in symptom severity were observed across genotypes for both 5HTR2A 1438A/G and 102T/C polymorphisms.
- A significant association was identified between panic symptom severity and the serotonin 2A receptor gene.
Conclusions:
- Specific polymorphic regions within the 5HTR2A gene (1438A/G and 102T/C) are associated with panic symptom severity in panic disorder.
- These findings suggest a role for 5HTR2A gene variations in the phenotype or pathogenesis of panic disorder, influencing symptom expression rather than disease presence.
- Further research is warranted to elucidate the precise mechanisms linking 5HTR2A gene polymorphisms to panic disorder symptomatology.
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