STAT6 rs2428494: Understanding Genetic Links to IgE and Allergy
The rs2428494 variant is a genetic marker located within the STAT6 gene, which plays a critical role in the body's immune signaling pathways. Research has associated this variant with variations in serum total IgE levels and a potential increased susceptibility to multi-food allergic responses.
What each genotype means
Baseline IgE risk profile
This genotype represents the common baseline state for this regulatory region of the STAT6 gene. Research indicates that individuals with this genotype do not carry the specific variant associated with elevated serum total IgE levels or increased susceptibility to multi-food allergic responses. This is considered the standard genetic background in most populations.
This is the most common genotype in European populations, carried by approximately 50% of individuals.
Elevated IgE risk marker
Carrying one copy of this variant is associated with a statistical increase in serum total IgE levels and a higher likelihood of multi-food allergic responses. Because this is an intronic regulatory variant, it may influence how the STAT6 gene is expressed during immune responses, though the clinical impact for any single individual remains limited and variable.
This heterozygous genotype is found in roughly 40% of individuals of European ancestry and is highly prevalent in African populations.
Increased IgE risk profile
Carrying two copies of this variant is associated with the highest statistical probability of elevated serum total IgE levels and susceptibility to multi-food allergies within the context of this specific genetic marker. While this variant is linked to allergic inflammation pathways, it is not a diagnostic test for any specific condition; please discuss any concerns regarding allergic symptoms with your clinician.
This homozygous genotype is present in approximately 10% of individuals of European ancestry, with higher frequencies observed in African populations.
What is rs2428494?
The variant rs2428494 is a single nucleotide polymorphism (SNP) located within the STAT6 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is classified as an intronic regulatory variant, meaning it sits within a non-coding region of the gene that may influence how the gene is turned on or off. Because it is located in a regulatory area, researchers investigate whether it alters the production or activity of the protein encoded by the STAT6 gene. While it does not change the protein's structure directly, its position suggests it could affect the efficiency of gene expression, which is a common mechanism by which non-coding variants influence complex human traits.
The Role of the STAT6 Gene
The STAT6 gene encodes the Signal Transducer and Activator of Transcription 6 protein. This protein is a vital component of the IL-4 and IL-13 signaling pathways, which are central to the regulation of the immune system, particularly in the development of Th2 cells. These cells are responsible for coordinating allergic responses and the production of Immunoglobulin E (IgE), an antibody that plays a key role in allergic reactions. When the IL-4 or IL-13 pathways are activated, STAT6 helps transmit signals to the cell nucleus to trigger the expression of specific genes. Because of its central role in these pathways, variations in the STAT6 gene are frequently studied as potential contributors to atopic conditions, such as asthma, eczema, and food allergies, where the immune system may overreact to environmental triggers.
Research and Evidence Strength
Current research into rs2428494 and other STAT6 variants suggests an association with elevated serum total IgE levels and susceptibility to food allergies. However, the evidence strength for this specific variant is currently considered limited. While some studies have identified correlations between STAT6 polymorphisms and allergic phenotypes, results can vary significantly between different populations and study designs. It is important to note that complex traits like food allergies are polygenic, meaning they are influenced by many different genes, environmental factors, and gene-environment interactions. Consequently, the presence of a specific genotype at rs2428494 does not guarantee the development of an allergy, nor does its absence provide immunity. The scientific community continues to investigate these associations to better understand the underlying biological mechanisms.
What You Can Do With This Information
Genetic information regarding variants like rs2428494 is primarily intended for educational and research purposes. Because the link between this variant and clinical outcomes is not definitive, it cannot be used to diagnose an allergy or predict an individual's health trajectory. If you have concerns about food allergies, asthma, or other immune-related symptoms, the most effective approach is to consult with a board-certified allergist or immunologist. These professionals can perform validated clinical tests, such as skin prick tests or blood tests, to assess your health status. Never use genetic data to make decisions about your diet, medication, or medical care without first discussing them with a qualified healthcare provider. Understanding your genetic background can be a fascinating way to learn about human biology, but it should always be secondary to professional clinical evaluation.
How common is this variant?
The minor allele frequency for this variant is approximately 0.28 in European populations and 0.45 in African populations according to gnomAD data.
Frequently asked questions
Does having the rs2428494 variant mean I have a food allergy?
No. Genetic variants are only one of many factors that contribute to the development of allergies. A clinical diagnosis must be made by a healthcare professional based on physical symptoms and medical testing.
Can I use this SNP to predict if my child will have allergies?
No. Allergy development is complex and involves a combination of genetics, environment, and immune system development. Genetic testing for this SNP is not a diagnostic tool for predicting allergies.
Is rs2428494 the only gene involved in allergies?
Absolutely not. Allergies are polygenic, meaning they are influenced by many different genes throughout the genome. STAT6 is just one of many genes that researchers study in the context of immune regulation.
Where can I find more information about my specific genetic results?
If you have received genetic testing results, you should discuss them with a genetic counselor or your primary care physician. They can help you interpret the information in the context of your personal and family medical history.
Sources & further reading
Educational information only, last refreshed 10/17/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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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.