STAT6 rs324015: What Your Genotype Means
The rs324015 variant is a single nucleotide polymorphism located in the STAT6 gene, which plays a central role in immune system regulation. Research has investigated its potential association with various inflammatory conditions, including food allergies, asthma, and ulcerative colitis.
What each genotype means
Increased food allergy risk
Research indicates that the A allele is associated with an increased risk of food allergies, including peanut and cow's milk allergy. Individuals with this genotype may exhibit higher levels of specific IgE antibodies and potentially more severe allergic symptoms compared to those with the G allele.
The frequency of this genotype varies significantly by ancestry and is generally less common than the GG genotype in many populations.
Intermediate allergy risk profile
This heterozygous genotype represents an intermediate state between the A and G homozygous profiles. Studies suggest that carriers of the A allele may have a higher predisposition to allergic sensitization and related clinical reactivity compared to those who are homozygous for the G allele.
This genotype is found at varying frequencies across global populations, reflecting the mixed distribution of the A and G alleles.
Typical STAT6 expression profile
The GG genotype is associated with higher levels of STAT6 gene expression compared to the AA genotype. While some studies have linked this genotype to a longer persistence of cow's milk allergy in children, other research suggests the A allele is the primary driver of increased food allergy risk, making the clinical interpretation of the GG genotype complex and context-dependent.
The GG genotype is the most common genotype observed in many studied populations.
Understanding the rs324015 Variant
The rs324015 variant is a genetic change where a guanine (G) is replaced by an adenine (A) in the DNA sequence. It is located in the STAT6 gene, specifically within the 3' untranslated region. This region of a gene does not code for protein directly but is often involved in regulating how much protein is produced or how stable the messenger RNA (mRNA) is within a cell. Because of its location, researchers have long hypothesized that this variant might influence the expression levels of the STAT6 protein, thereby affecting how the body responds to certain immune signals. Genetic variants like rs324015 are common, and scientists study them to understand why individuals may have different predispositions to immune-related traits.
The Role of the STAT6 Gene
The STAT6 gene provides instructions for making a protein called Signal Transducer and Activator of Transcription 6. This protein acts as a key messenger in the immune system, particularly in response to two specific signaling molecules: interleukin-4 (IL-4) and interleukin-13 (IL-13). When these molecules bind to their receptors on the surface of immune cells, STAT6 is activated and travels to the cell nucleus to turn on specific genes. This pathway is essential for the development of Th2 immune responses, which are involved in fighting parasites but are also the primary drivers of allergic inflammation. Because STAT6 is so central to these processes, variations in the gene are frequently studied in the context of atopic diseases like asthma, eczema, and food allergies.
Research Associations and Evidence Strength
The evidence linking rs324015 to specific health outcomes is considered moderate and often inconsistent across different populations. Some studies have suggested that the variant may influence the age at which children develop tolerance to cow's milk, with certain genotypes potentially linked to a longer duration of allergy. Other research has explored its role in asthma and ulcerative colitis, with some studies finding associations with disease risk or severity, while others have found no significant link. For example, meta-analyses have produced mixed results regarding its protective or risk-increasing effects on atopic asthma. These discrepancies are common in genetic research, as the impact of a single variant can be influenced by a person's overall genetic background, environmental factors, and ancestry.
Population Frequency
The frequency of the rs324015 variant varies significantly across different global populations. Because it is a common polymorphism, both the G and A alleles are found at substantial frequencies in many groups, though the exact proportions differ between European, Asian, and African ancestries. This variability is one reason why a study conducted in one population may not always replicate in another. Researchers often look at these frequency differences to better understand the evolutionary history of the variant and to ensure that genetic studies are representative of diverse groups.
Interpreting Your Genetic Information
It is important to understand that having a specific genotype for rs324015 does not mean you will develop a particular condition. Genetic associations are statistical observations made across large groups of people, not diagnostic tools for individuals. Many factors, including diet, environment, and thousands of other genetic variants, contribute to the development of complex traits like food allergies or asthma. If you are concerned about your health or potential allergies, this information should not be used to make medical decisions. Always consult with a qualified healthcare provider or an allergist who can evaluate your symptoms, medical history, and clinical test results to provide personalized guidance.
How common is this variant?
The rs324015 variant is common, with allele frequencies that vary by ancestry. It is widely distributed across global populations, though specific genotype distributions are highly dependent on the ethnic background of the group studied.
Frequently asked questions
Does the rs324015 variant cause food allergies?
No, this variant does not cause food allergies. It is a genetic marker that has been statistically associated with certain immune-related traits, but food allergies are complex conditions influenced by many genetic and environmental factors.
Can I use this SNP to predict if my child will outgrow an allergy?
While some research has explored links between this variant and the age of tolerance to cow's milk, it is not a clinical test. You should rely on the guidance of a pediatric allergist for managing and monitoring your child's food allergies.
Is rs324015 the same as other STAT6 variants?
No, rs324015 is a specific location in the STAT6 gene. Other variants, such as rs324011, are also located in the same gene but represent different genetic changes and may have different associations with health traits.
Should I change my diet based on my rs324015 genotype?
No. You should never change your diet or medical management based on a single genetic variant. Always discuss any dietary concerns or symptoms with a healthcare professional or a registered dietitian.
Sources & further reading
Educational information only, last refreshed 10/29/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Get my report — $29Related variants in STAT6
Intronic variant in STAT6 associated with elevated serum IgE levels and food allergy susceptibility.
An established intronic variant in STAT6 that enhances transcriptional activity and correlates with elevated serum total IgE levels and allergic rhinitis.
STAT6 intronic variant modulating IL-4/IL-13 signaling and associated with atopic dermatitis and asthma risk.
Intronic regulatory polymorphism in STAT6 associated with elevated serum IgE levels and mucosal allergic reactivity.
Non-coding variant in the key Th2 signaling transducer STAT6, frequently linked to elevated serum IgE levels and allergic rhinitis risk.
This variant is linked to the clinical phenotype of eosinophilic esophagitis, reflecting the role of immune regulation in the disease.