SLC22A12 rs4072252: Uric Acid and Gout Risk
The rs4072252 variant is a single-nucleotide polymorphism located within the SLC22A12 gene, which encodes the URAT1 renal urate transporter. URAT1 plays a fundamental role in reabsorbing uric acid from filtered urine back into the bloodstream. Population genetics studies have linked alleles at rs4072252 to modest shifts in serum uric acid concentrations and relative risk for hyperuricemia and gout.
What each genotype means
Typical urate transporter profile
This genotype represents the homozygous state for the major allele of the rs4072252 variant. Research indicates this variant in the SLC22A12 gene is associated with variations in serum uric acid levels, though the clinical impact of this specific genotype is considered limited and may vary significantly by ancestry.
This genotype is common globally, though its exact frequency varies significantly across different continental populations.
Typical urate transporter profile
This genotype represents the heterozygous state for the rs4072252 variant. While this variant is located in the gene responsible for the URAT1 renal urate transporter, current evidence regarding its specific contribution to hyperuricemia or gout risk is limited and inconsistent across studies.
This genotype is found in a substantial portion of the global population, reflecting the common nature of this genetic variant.
Typical urate transporter profile
This genotype represents the homozygous state for the minor allele of the rs4072252 variant. While the SLC22A12 gene is critical for uric acid homeostasis, the association between this specific variant and clinical outcomes like gout remains a subject of ongoing research with limited evidence of a strong individual effect.
This genotype is observed across major continental populations, with frequencies reflecting the common distribution of the minor allele.
What is rs4072252 and Where is it Located?
The genetic marker rs4072252 is a single-nucleotide polymorphism (SNP) situated within the SLC22A12 gene on the long arm of human chromosome 11 (11q13.1). The standard reference and alternate alleles at this locus involve a cytosine-to-thymine (C/T) transition. Unlike rare, non-functional nonsense or missense mutations that directly eliminate transporter activity, rs4072252 is an intronic variant that does not alter the protein coding sequence directly. Instead, it serves as a common regulatory marker or tagging variant that reflects subtle differences in SLC22A12 expression or is inherited in linkage disequilibrium with other functional urate transporter loci. Because it falls within a non-coding region, its physiological consequences are quantitative rather than catastrophic, contributing to continuous variation in circulating urate levels across large population groups.
The Biological Function of SLC22A12 (URAT1)
The SLC22A12 gene encodes solute carrier family 22 member 12, popularly referred to as urate transporter 1 (URAT1). Expressed primarily on the apical brush border membrane of renal proximal tubular epithelial cells, URAT1 regulates human purine metabolism by reabsorbing urate from primary urine back into systemic circulation. Uric acid is the end product of human purine catabolism; maintaining physiological circulating levels requires finely balanced renal excretion and reuptake. Complete disruption of URAT1 causes hereditary renal hypouricemia type 1, a rare condition that drives serum urate levels down to near zero. Because URAT1 is central to renal clearance, it also represents the direct therapeutic target of several clinical uricosuric medications used in rheumatology, including benzbromarone and lesinurad.
Scientific Research, Gout, and Hyperuricemia
Genome-wide association studies (GWAS) and targeted candidate gene analyses have repeatedly evaluated URAT1 variants for their contribution to serum urate balance and gout risk. Individuals carrying specific alleles at rs4072252 show small, statistically significant deviations in baseline serum urate concentrations. The T allele has been associated with slightly elevated circulating urate levels and modest increases in gout susceptibility, whereas the C allele is typically correlated with lower urate reabsorption. However, the evidence strength for rs4072252 acting as an independent causative driver is classified as limited. In large-scale GWAS meta-analyses, common variants within SLC2A9 (encoding GLUT9) and ABCG2 generally exhibit far larger effect sizes on gout risk, meaning rs4072252 acts as one of several polygenic modulators with subtle incremental influence.
Population Frequency and Ancestral Patterns
Unlike severe loss-of-function URAT1 mutations (such as W258X or R90H), which occur primarily in East Asian or specific founder populations, rs4072252 is a common polymorphism found globally. Across major continental populations cataloged in human genomic databases, the minor allele frequency generally ranges between 0.20 and 0.45. This broad distribution indicates that both major and minor alleles have been carried in the human gene pool for many generations. Because allele frequencies and background linkage disequilibrium structures differ substantially across ancestral groups, the precise statistical association between rs4072252 and uric acid traits can vary across diverse cohorts, highlighting why multi-ancestry genetic studies remain vital.
What You Can and Cannot Do with this Information
Discovering your rs4072252 genotype provides a window into your polygenic architecture, but it is not a diagnostic test. Carrying an allele statistically associated with higher uric acid does not guarantee you will develop hyperuricemia, kidney stones, or gout. Gout development depends heavily on modifiable factors, including dietary purine intake, alcohol consumption, hydration, body mass index, and overall renal health. Conversely, carrying a lower-risk genotype does not render one immune to gout. Never alter, start, or discontinue any urate-lowering or renal medications based on direct-to-consumer genetic markers. If you have questions about gout symptoms or kidney health, discuss serum urate testing and clinical management directly with your physician.
How common is this variant?
The rs4072252 variant is common worldwide, with the minor allele frequency typically ranging between 0.20 and 0.45 across major continental populations.
Frequently asked questions
Can rs4072252 diagnose whether I have gout?
No, rs4072252 cannot diagnose gout. Gout is diagnosed through clinical symptoms, joint fluid analysis for monosodium urate crystals, and laboratory blood tests. This variant confers only a small statistical shift in urate levels.
Does having the TT genotype mean I will definitely get high uric acid?
Not necessarily. Although the TT genotype is statistically correlated with higher serum urate levels across large population groups, lifestyle factors, kidney function, and other major genes like ABCG2 play larger roles in your actual blood levels.
How does URAT1 affect uric acid in the kidneys?
URAT1 is a transport protein located on the surface of renal tubular cells that actively reabsorbs uric acid from filtered urine back into the blood. Variations that increase or decrease this transporter's efficiency can influence circulating urate levels.
Should I change my diet or gout medications based on this result?
No. Genetic testing for this common SNP should never guide medication adjustments or diagnostic conclusions. You should consult a physician or pharmacist before making any changes to your medication regimen or health plan.
Sources & further reading
Educational information only, last refreshed 9/6/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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