The SLC2A9 gene gives your cells instructions for a protein that moves uric acid, especially in the kidneys, to help control how much stays in the blood and how much leaves in urine. This gene helps your body keep uric acid in balance, which matters for joints and kidney health. If it does not work well, some people develop very low uric acid levels, kidney stones, or kidney strain after intense exercise. Common variants in the SLC2A9 gene are also linked to differences in uric acid levels and gout risk.
What is a gene?
Genes are sections of DNA that hold instructions your cells use to make molecules or guide processes in the body. Some genes provide the directions for producing proteins, the parts of cells that do much of the work. Other genes mainly regulate when certain processes occur, where they take place, and how strongly they run. Working together, genes affect how the body develops and functions, and they can also influence how you respond to food, stress, or medications. For a deeper look at this topic, you can learn more in the LearnHub.
Overview
SLC2A9Gene function
What if the gene works
The SLC2A9 gene helps move uric acid in the kidneys and other tissues. This supports balanced uric acid levels in blood and urine, which helps protect joints and kidneys.
Risk
What if the gene does not work
More disruptive variants in the SLC2A9 gene can cause low uric acid levels from excess urine loss, sometimes leading to kidney stones or exercise-related kidney injury. Milder variants may shift uric acid levels and influence gout risk.
Treatment
What does that mean for your treatment
Pathogenic variants in the SLC2A9 gene can shift management toward preventing kidney stress, with good hydration and avoiding very intense exercise. If exercise related acute kidney injury has occurred, some specialists may consider a xanthine oxidase inhibitor such as allopurinol to lower uric acid production and reduce the chance of another episode. Routine urate lowering treatment used for gout is generally not the goal here.
Conditions associated with SLC2A9
Gene function
What if the gene works
Your kidneys constantly fine tune how much uric acid stays in your blood and how much leaves in urine. The SLC2A9 gene helps with this balancing act by making a transport protein that moves uric acid through cell membranes. Understanding what the SLC2A9 gene does helps explain how the body keeps uric acid levels in a healthy range.
The SLC2A9 gene makes a transport protein that moves uric acid into and out of cells. This helps the body handle uric acid as a normal waste product from breaking down purines (parts of cells and some foods).
In the kidneys, this protein helps return some uric acid from forming urine back into the blood. That recycling step is a normal part of setting how much uric acid leaves the body each day.
By shifting uric acid across cell membranes in a controlled way, the SLC2A9 gene supports steady levels in blood and urine. This keeps everyday waste handling more balanced from one day to the next.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These differences are common and help shape normal human diversity, including differences in appearance, metabolism, and the way the body reacts to environmental influences. Many do not have any noticeable effect and are simply part of natural genetic variation. Sometimes, though, a variant changes how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Changes in the SLC2A9 gene can alter the GLUT9 transport protein so it is made incorrectly, reaches the cell surface poorly, or moves less uric acid. This explains how SLC2A9 gene variants affect urate transport at the cell level. Milder variants may only partly reduce transport, while more severe variants can greatly limit or abolish it. In people with renal hypouricemia linked to SLC2A9, stronger loss of function may be tied to earlier or more marked findings.
How variants are linked to conditions
Variants in the SLC2A9 gene are best known for causing renal hypouricemia type 2, an inherited condition marked by very low uric acid levels that can lead to kidney stones and, in some people, exercise related acute kidney injury. Beyond this rare diagnosis, the link between the SLC2A9 gene and gout risk is well established: common variants can raise or lower blood uric acid levels and influence the chance of developing gout, but they do not make gout certain.
A variant is not necessarily a diagnosis
Genetic variants are a usual feature of human biology and are widely seen in the general population. Most do not have a direct effect on health and instead represent natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors are part of the picture. In some situations, though, a single well-characterized variant in a specific gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For people with SLC2A9 changes linked to higher uric acid, risk of gout or uric acid kidney stones can also be affected by body weight, alcohol, sugary drinks, dehydration, kidney health, and some medicines. Family history and sex also play a part, so the gene is one factor among several.
Inheritance of SLC2A9 variants
For the rare kidney condition linked to the SLC2A9 gene, called renal hypouricemia type 2, the SLC2A9 inheritance pattern is autosomal recessive. This means a person usually inherits one altered copy from each parent, and the parents are often healthy carriers. When both parents carry an SLC2A9 variant, each child has a 25% chance of inheriting both altered copies, a 50% chance of being a carrier, and a 25% chance of inheriting neither altered copy.
What does my SLC2A9 result mean for my family?
For the rare inherited condition linked to the SLC2A9 gene, close relatives may also carry the same gene change. Brothers and sisters can sometimes have the condition too, even if symptoms differ, and parents are often healthy carriers. If your result is instead a common SLC2A9 change linked only to uric acid levels or gout risk, what it means for family members is much less direct.
Genetic information
Genetic testing
How you find out about variants
To find variants in the SLC2A9 gene, a lab uses genetic testing on a blood sample, saliva, or cheek swab. SLC2A9 genetic testing reads the DNA code and checks for changes that may be linked to inherited uric acid patterns or gout risk. Results can show a specific variant, no relevant variant, or an unclear finding.
When should I consider getting a genetic test?
Testing for the SLC2A9 gene may be worth discussing if someone has very low uric acid levels, repeated kidney stones, or sudden kidney problems after hard exercise, especially if these run in the family. In that setting, a gene test can help confirm an inherited cause. It is not usually needed for typical gout alone.
A genetic result is only one part of your health story
Genetic test results can provide useful insight, but how much they explain varies with the condition and the kind of variant found. Over time, many factors, including lifestyle, environment, age, and medical history, influence how the body functions. For some conditions, particularly those shaped by many genes, genetic information offers context rather than certainty and makes the most sense when viewed alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, these results can also help frame individual experiences.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body absorbs, breaks down, transports, or responds to a drug, so the same treatment may work better for one person than for another. This is common and can influence how much benefit someone gets from a medicine or how sensitive they are to side effects.
What is Pharmacogenetics?
Pharmacogenetics looks at how differences in genes can shape a person’s response to medication. It examines the relationship between genes and drugs to better explain why the same treatment can work differently from one person to another. With many medicines, genes influence both how strongly a drug works and how the body processes it. This understanding can help support treatment decisions that are more informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the SLC2A9 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response, so questions about medicines, side effects, or related health concerns are best discussed with your doctor.
History
SLC2A9 came to medical attention in the late 2000s, when large genetic studies linked it to blood uric acid levels and gout risk. At first, researchers knew it as a member of the glucose transporter family, but its importance in uric acid biology soon became clearer. From these first observations, research expanded steadily. Studies in different populations then confirmed that variants in the SLC2A9 gene were among the strongest common genetic influences on uric acid levels. This work helped reshape how scientists viewed gout, moving it beyond diet alone and toward a clearer picture of inherited risk. Over time, SLC2A9 became a regular feature in research on kidney handling of uric acid and related conditions.