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2021 Impact Factor 1.766
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Korean Journal of Biological Psychiatry 2007;14(2):106-14. Published online: Feb, 1, 2007
Objective:It is suggested that disturbance of dopaminergic system might be related to the possible mechanism of social phobia. The aim of this study was to investigate the possible association of DRD2
TaqI polymorphism and social phobia.
Method:Fifty-one patients with social phobia and 200 comparison subjects were tested for DRD2
TaqI A polymorphism. The severity of social phobic symptoms was measured by self-report version of the Liebowitz Social Anxiety Scale(LSAS-SR) and Hamilton anxiety scale(HAM-A).
Results:There was no signigicant difference in the genotype, allele frequency, A1 carrier frequency, and heterozygote frequency DRD2
TaqI A polymorphism between the social phobia patients and the control groups. However, we found significant decrease in somatic anxiety of the HAM-A in the patients having A2A2 homozygotes(p=0.014). In addition, patients having A1A2 heterozygotes showed more anxiety in two subscales(p=0.042 in anxiety, p=0.019 in performance) of the LSAS-SR.
Conclusion:These results suggest that DRD2 A2 homozygote might have a protective role against somatic anxiety, and molecular heterosis of DRD2
TaqI A polymorphism might be related with more severe anxiety in social phobia.
Keywords Social phobia;Heterozygote;DRD2 <i>Taq</i>I A Polymorphism.