TY - JOUR T1 - Genome-wide association study for serum urate concentrations and gout among African Americans identifies genomic risk loci and a novel URAT1 loss-of-function allele. JF - Hum Mol Genet Y1 - 2011 A1 - Tin, Adrienne A1 - Woodward, Owen M A1 - Kao, Wen Hong Linda A1 - Liu, Ching-Ti A1 - Lu, Xiaoning A1 - Nalls, Michael A A1 - Shriner, Daniel A1 - Semmo, Mariam A1 - Akylbekova, Ermeg L A1 - Wyatt, Sharon B A1 - Hwang, Shih-Jen A1 - Yang, Qiong A1 - Zonderman, Alan B A1 - Adeyemo, Adebowale A A1 - Palmer, Cameron A1 - Meng, Yan A1 - Reilly, Muredach A1 - Shlipak, Michael G A1 - Siscovick, David A1 - Evans, Michele K A1 - Rotimi, Charles N A1 - Flessner, Michael F A1 - Köttgen, Michael A1 - Cupples, L Adrienne A1 - Fox, Caroline S A1 - Köttgen, Anna KW - Adult KW - African Americans KW - Aged KW - Animals KW - CHO Cells KW - Cricetinae KW - European Continental Ancestry Group KW - Female KW - Genetic Loci KW - Genetic Predisposition to Disease KW - Genome-Wide Association Study KW - Genotype KW - Gout KW - Humans KW - Loss of Heterozygosity KW - Male KW - Middle Aged KW - Organic Anion Transporters KW - Organic Cation Transport Proteins KW - Polymorphism, Single Nucleotide KW - Uric Acid KW - Young Adult AB -

Serum urate concentrations are highly heritable and elevated serum urate is a key risk factor for gout. Genome-wide association studies (GWAS) of serum urate in African American (AA) populations are lacking. We conducted a meta-analysis of GWAS of serum urate levels and gout among 5820 AA and a large candidate gene study among 6890 AA and 21 708 participants of European ancestry (EA) within the Candidate Gene Association Resource Consortium. Findings were tested for replication among 1996 independent AA individuals, and evaluated for their association among 28 283 EA participants of the CHARGE Consortium. Functional studies were conducted using (14)C-urate transport assays in mammalian Chinese hamster ovary cells. In the discovery GWAS of serum urate, three loci achieved genome-wide significance (P< 5.0 × 10(-8)): a novel locus near SGK1/SLC2A12 on chromosome 6 (rs9321453, P= 1.0 × 10(-9)), and two loci previously identified in EA participants, SLC2A9 (P= 3.8 × 10(-32)) and SLC22A12 (P= 2.1 × 10(-10)). A novel rare non-synonymous variant of large effect size in SLC22A12, rs12800450 (minor allele frequency 0.01, G65W), was identified and replicated (beta -1.19 mg/dl, P= 2.7 × 10(-16)). (14)C-urate transport assays showed reduced urate transport for the G65W URAT1 mutant. Finally, in analyses of 11 loci previously associated with serum urate in EA individuals, 10 of 11 lead single-nucleotide polymorphisms showed direction-consistent association with urate among AA. In summary, we identified and replicated one novel locus in association with serum urate levels and experimentally characterize the novel G65W variant in URAT1 as a functional allele. Our data support the importance of multi-ethnic GWAS in the identification of novel risk loci as well as functional variants.

VL - 20 IS - 20 U1 - http://www.ncbi.nlm.nih.gov/pubmed/21768215?dopt=Abstract ER - TY - JOUR T1 - Large-scale whole-exome sequencing association studies identify rare functional variants influencing serum urate levels. JF - Nat Commun Y1 - 2018 A1 - Tin, Adrienne A1 - Li, Yong A1 - Brody, Jennifer A A1 - Nutile, Teresa A1 - Chu, Audrey Y A1 - Huffman, Jennifer E A1 - Yang, Qiong A1 - Chen, Ming-Huei A1 - Robinson-Cohen, Cassianne A1 - Mace, Aurelien A1 - Liu, Jun A1 - Demirkan, Ayse A1 - Sorice, Rossella A1 - Sedaghat, Sanaz A1 - Swen, Melody A1 - Yu, Bing A1 - Ghasemi, Sahar A1 - Teumer, Alexanda A1 - Vollenweider, Peter A1 - Ciullo, Marina A1 - Li, Meng A1 - Uitterlinden, André G A1 - Kraaij, Robert A1 - Amin, Najaf A1 - van Rooij, Jeroen A1 - Kutalik, Zoltán A1 - Dehghan, Abbas A1 - McKnight, Barbara A1 - van Duijn, Cornelia M A1 - Morrison, Alanna A1 - Psaty, Bruce M A1 - Boerwinkle, Eric A1 - Fox, Caroline S A1 - Woodward, Owen M A1 - Köttgen, Anna KW - Exome KW - Genetic Predisposition to Disease KW - Glucose Transport Proteins, Facilitative KW - Humans KW - Kidney Function Tests KW - Meta-Analysis as Topic KW - Organic Anion Transporters KW - Organic Cation Transport Proteins KW - Protein Structure, Secondary KW - Uric Acid AB -

Elevated serum urate levels can cause gout, an excruciating disease with suboptimal treatment. Previous GWAS identified common variants with modest effects on serum urate. Here we report large-scale whole-exome sequencing association studies of serum urate and kidney function among ≤19,517 European ancestry and African-American individuals. We identify aggregate associations of low-frequency damaging variants in the urate transporters SLC22A12 (URAT1; p = 1.3 × 10) and SLC2A9 (p = 4.5 × 10). Gout risk in rare SLC22A12 variant carriers is halved (OR = 0.5, p = 4.9 × 10). Selected rare variants in SLC22A12 are validated in transport studies, confirming three as loss-of-function (R325W, R405C, and T467M) and illustrating the therapeutic potential of the new URAT1-blocker lesinurad. In SLC2A9, mapping of rare variants of large effects onto the predicted protein structure reveals new residues that may affect urate binding. These findings provide new insights into the genetic architecture of serum urate, and highlight molecular targets in SLC22A12 and SLC2A9 for lowering serum urate and preventing gout.

VL - 9 IS - 1 ER -