SLC12A3 (Solute Carrier Family 12 Member [Sodium/Chloride] 3) Polymorphisms Are Associated With End-Stage Renal Disease in Diabetic Nephropathy

SLC12A3 (Solute Carrier Family 12 Member [Sodium/Chloride] 3) Polymorphisms Are Associated With End-Stage Renal Disease in Diabetic Nephropathy Jae Hyeon Kim 1 2 , Hyoung Doo Shin 3 , Byung Lae Park 3 , Min Kyong Moon 1 2 , Young Min Cho 3 4 , Young Hwan Hwang 4 , Kook Whan Oh 4 , Seong Yeon Kim 4 , Hong Kyu Lee 4 , Curie Ahn 4 and Kyong Soo Park 3 4 1 Department of Internal Medicine, Seoul National University Boramae Hospital, Seoul, Korea 2 Genome Research Center for Diabetes and Endocrine Disease, Clinical Research Institute, Seoul National University Hospital, Seoul, Korea 3 Department of Genetic Epidemiology, SNP genetics, Seoul, Korea 4 Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea Address correspondence and reprint requests to Kyong Soo Park, MD, PhD, or Curie Ahn, MD, PhD, Department of Internal Medicine, Seoul National University College of Medicine, 28 Yongon-Dong Chongno-Gu, Seoul, 110-744, Korea. E-mail: kspark{at}snu.ac.kr or curie55{at}naver.com Abstract Diabetic nephropathy is the most common cause of end-stage renal disease (ESRD). Genetic susceptibility plays an important role in the development and progression of diabetic nephropathy. Previous studies have revealed that polymorphisms in the SLC12A3 (solute carrier family 12 member [sodium/chloride] 3) gene, which encodes solute carrier family 12 member 3, might contribute to genetic susceptibility to diabetic nephropathy and essential hypertension. In this study, we examined whether the SLC12A3 gene locus is associated with ESRD resulting from diabetic nephropathy. We genotyped 11 common single nucleotide polymorphisms (SNPs) in the SLC12A3 gene in 177 patients with ESRD due to type 2 diabetes and 184 patients with diabetic retinopathy but with no signs of renal involvement. Three SNPs (g.34372G>A [Arg913Gln], g.39143G>A, and g.41727C>T) were found to be associated with ESRD due to diabetic nephropathy. These three SNPs were in complete linkage disequilibrium. Haplotype 4 in block 2 (18806C, 21822C, 34372A, 39143A, 39240T, 39375C, and 41727T) showed a significant association with ESRD due to type 2 diabetes ( P = 0.0028). These results suggest that the SLC12A3 gene locus is associated with ESRD due to diabetic nephropathy. ESRD, end-stage renal disease LD, linkage disequilibrium SNP, single nucleotide polymorphism Footnotes The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefo