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http://dx.doi.org/10.3904/kjim.2015.30.6.913

Genetic analysis of ABCG2 and SLC2A9 gene polymorphisms in gouty arthritis in a Korean population  

Kim, Yun Sung (Department of Internal Medicine, Chosun University School of Medicine)
Kim, Yunsuek (Department of Internal Medicine, Soonchunhyang University Hospital)
Park, Geon (Department of Clinical Pathology, Chosun University School of Medicine)
Kim, Seong-Kyu (Department of Internal Medicine, Catholic University of Daegu School of Medicine)
Choe, Jung-Yoon (Department of Internal Medicine, Catholic University of Daegu School of Medicine)
Park, Byung Lae (Department of Genetic Epidemiology, SNP Genetics Inc.)
Kim, Hyun Sook (Department of Internal Medicine, Soonchunhyang University Hospital)
Publication Information
The Korean journal of internal medicine / v.30, no.6, 2015 , pp. 913-920 More about this Journal
Abstract
Background/Aims: Gout is a common inflammatory arthritis triggered by the crystallization of uric acid in the joints. Serum uric acid levels are highly heritable, suggesting a strong genetic component. Independent studies to confirm the genetic associations with gout in various ethnic populations are warranted. We investigated the association of polymorphisms in the $ABCG_2$ and $SLC_2A_9$ genes with gout in Korean patients and healthy individuals. Methods: We consecutively enrolled 109 patients with gout and 102 healthy controls. The diagnosis of gout was based on the preliminary criteria of the America College of Rheumatology. Genomic DNA was extracted from whole blood samples. We identified single nucleotide polymorphism (SNP) changes in the $ABCG_2$ and $SLC_2A_9$ genes using a direct sequencing technique. rs2231142 in $ABCG_2$ and rs6449213 and rs16890979 in $SLC_2A_9$ and nearby regions were amplified by polymerase chain reaction. Results: Patients with gout had significantly higher A/A genotype (29.3% vs. 4.9%, respectively) and A allele (52.8% vs. 26.5%, respectively) frequencies of rs2231142 in $ABCG_2$ than did controls ($x^2$ = 29.42, p < 0.001; odds ratio, 3.32; 95% confidence interval, 2.11 to 5.20). We found novel polymorphisms (c.881A>G and c.1002+78G>A) in the SLC2A9 gene. The univariate logistic regression analysis revealed that the c.881A>G and c.1002+78G>A SNPs were significantly higher in patients than in controls. Conclusions: We demonstrated a significant association between rs2231142 in the $ABCG_2$ gene and gout and identified novel SNPs, c.881A>G and c.1002+78G>A, in the $SLC_2A_9$ gene that may be associated with gout in a Korean population.
Keywords
Gout; $ABCG_2$; $SLC_2A_9$;
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