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  • Title: Genetic association of DRD2 polymorphisms with anxiety scores among alcohol-dependent patients.
    Author: Joe KH, Kim DJ, Park BL, Yoon S, Lee HK, Kim TS, Cheon YH, Gwon DH, Cho SN, Lee HW, Namgung S, Shin HD.
    Journal: Biochem Biophys Res Commun; 2008 Jul 11; 371(4):591-5. PubMed ID: 18307984.
    Abstract:
    The dopaminergic neurotransmission system is one of the major factors in development of alcoholism and also contributes to anxiety and depression. In this study, the associations of the dopamine receptor type 2 (DRD2) polymorphisms with the symptoms of anxiety were analyzed. A total of 573 alcoholics and 273 controls were enrolled in the study from the Korean population. Five DRD2 SNPs, including -32869 A>G, -32768 insdel C, +11890 C>G, +11915 C>T, and +32806 C>T, were genotyped using a TaqMan assay and analyzed with various alcoholic phenotypes. Although no DRD2 polymorphisms were associated with the risk of alcoholism, +32806C>T and Block2-ht1 showed associations (in dominant models) with both the state anxiety level scale (STAI-S) and the trait anxiety level scale (STAI-T) (P=0.004 and P=0.003, and P=0.01 and P=0.005, respectively). In addition, the -32768 insdel C also showed positive association with both anxiety level scales in recessive models (P=0.01 and P=0.02, respectively).
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