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Discovery of URAT1 SNPs and association between serum uric acid levels and URAT1

 Sung Kweon Cho  ;  Soriul Kim  ;  Jae-Yong Chung  ;  Sun Ha Jee 
 BMJ OPEN, Vol.5 : e009360, 2015 
Journal Title
Issue Date
Adult ; Alleles* ; Asian Continental Ancestry Group/genetics ; Case-Control Studies ; Genetic Predisposition to Disease ; Genotype* ; Humans ; Hyperuricemia/blood ; Hyperuricemia/genetics* ; Male ; Mutation ; Odds Ratio ; Organic Anion Transporters/genetics* ; Organic Cation Transport Proteins/genetics* ; Phenotype ; Polymorphism, Single Nucleotide* ; Republic of Korea ; Uric Acid/blood* ; Young Adult
OBJECTIVES: Human urate transporter 1 (URAT1) is a member of the organic anion transporter family (SLC22A12) that primarily regulates the renal tubular reabsorption of uric acid. This case-control study was designed to analyse whether hURAT1 might also be a candidate gene for hyperuricaemia or hypouricaemia.

SETTING: We recruited 68 healthy volunteers and divided them into two groups: a normal uric acid group and a hyperuricaemia group. We analysed the sequence of the URAT1 gene and found five significant single nucleotide polymorphisms (SNPs). We then selected 900 male subjects from the 262,200 enrolled in the Korean Cancer Prevention Study-II (KCPS-II) cohort for further genetic analysis.

PARTICIPANTS: DNA samples from 36 individuals with normal uric acid (<4.5 mg/dL) and 32 individuals with hyperuricaemia (>8.5 mg/dL) were sequenced. Five significant SNPs (rs7929627, rs75786299, rs3825017, rs11602903 and rs121907892) were identified. We then chose 900 subjects from the KCPS-II cohort consisting of 450 subjects with normal uric acid (UA <4.1 mg/dL) and 450 subjects with hyperuricaemia (UA >8.7 mg/dL). The groups were matched by age, body mass index, metabolic syndrome and use of anti-hypertensive medication.

PRIMARY OUTCOME MEASURES: We compared the OR of the incidence of hyperuricaemia by URAT1 genotype.

RESULTS: The strongest association with hyperuricaemia was observed for rs75786299 (IVS3+11A/G) with an OR of 32.05. rs7929627 (IVS7-103A/G) and rs3825017 (N82N) showed an association with hyperuricaemia with ORs of 2.56 and 2.29, respectively. rs11602903 (788A/T) and rs121907892 (W258X) were negatively correlated with hyperuricaemia with ORs of 0.350 and 0.447, respectively. Individuals carrying the GATAG haplotype (n=32)-a relatively common variant consisting of rs7929627, rs75786299 and rs3825017-showed the highest risk for hyperuricaemia with an OR of 92.23 (p=9.55×10(-3)).

CONCLUSIONS: These results indicate that five newly described SNPs in the hURAT1 gene are significantly associated with uric acid level (4-2008-0318 and 4-2011-0277).
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Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Pharmacology (약리학교실) > 1. Journal Papers
4. Graduate School of Public Health (보건대학원) > Graduate School of Public Health (보건대학원) > 1. Journal Papers
Yonsei Authors
Cho, Sung Kweon(조성권)
Jee, Sun Ha(지선하) ORCID logo https://orcid.org/0000-0001-9519-3068
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