IL13 rs1295686: What Your Genotype Means for Allergy Risk
The rs1295686 variant is a single nucleotide polymorphism located within the IL13 gene, which plays a critical role in the human immune system. Research has associated this variant with variations in IgE levels and potential susceptibility to allergic and atopic conditions.
What each genotype means
Typical IL13 genetic profile
This genotype represents the most common genetic sequence found at this location in the IL13 gene. Research into this variant often focuses on its role in immune regulation, though this specific genotype is generally considered the baseline against which other variations are compared in studies of allergic tendencies.
This is the most frequent genotype observed across most global populations.
Intermediate IL13 variant profile
Carrying one copy of the T allele at this position has been investigated in the context of allergic conditions and immune response. While some studies suggest links between IL13 variants and markers like IgE levels, the evidence for this specific SNP is often tied to its proximity to other functional variants in the gene, and individual risk remains complex and multifactorial.
This heterozygous genotype is found at varying frequencies depending on ancestral background, appearing in a significant portion of the population.
Associated IL13 variant profile
Individuals with this genotype carry two copies of the T allele, which has been studied for its potential association with atopic traits and immune system sensitivity. Because this variant is often in linkage disequilibrium with other functional sites in the IL13 gene, it is difficult to isolate its specific effect, and it should not be used to predict personal health outcomes.
This genotype is less common than the CC or CT configurations and its prevalence varies significantly across different global populations.
Understanding the rs1295686 Variant
The rs1295686 variant is a specific change in the DNA sequence of the IL13 gene. In genetics, a single nucleotide polymorphism (SNP) like this represents a variation at a single position in the genome. This particular SNP is situated on chromosome 5, a region known to house several genes involved in immune response and inflammatory processes. By studying such variants, researchers aim to understand how minor differences in our genetic code can influence the way our bodies react to environmental triggers. While the presence of a specific allele at this site does not guarantee the development of any condition, it serves as a marker that scientists use to investigate the complex biological pathways underlying immune-related traits.
The Role of the IL13 Gene
The IL13 gene provides instructions for producing a protein called interleukin-13. This protein acts as a cytokine, a type of signaling molecule that helps regulate the immune system. Interleukin-13 is particularly important in the development of allergic inflammation and the body's response to parasites. It influences the production of immunoglobulin E (IgE), an antibody that plays a central role in allergic reactions. When the immune system is triggered, IL-13 helps coordinate the activity of various cells to mount a defense. Because of its central role in these pathways, variations in the IL13 gene are frequently studied to determine how they might alter the intensity or regulation of immune responses in different individuals.
Research and Evidence Strength
Scientific literature has identified the IL13 gene as a susceptibility locus for asthma and related atopic traits. Studies have consistently explored how genetic variations in this region correlate with clinical phenotypes across diverse populations. The evidence linking specific IL13 variants to elevated IgE levels and allergic tendencies is generally considered moderate. It is important to note that asthma and allergies are complex, polygenic conditions, meaning they are influenced by many genes working in concert with environmental factors. Consequently, while rs1295686 is a subject of interest in immunological research, it is only one piece of a much larger puzzle. Current findings suggest that while this variant may contribute to an individual's genetic predisposition, it does not act in isolation to cause disease.
Interpreting Your Genetic Information
Information regarding genetic variants like rs1295686 is intended for educational purposes and should not be used for medical diagnosis or self-treatment. Genetic associations are statistical observations made across large groups of people and cannot predict an individual's health outcome with certainty. If you are concerned about allergies, asthma, or your immune health, the most effective approach is to consult with a qualified healthcare provider or an allergist. They can evaluate your symptoms, medical history, and environmental exposures to provide personalized care. Never make changes to your medications or health routines based on genetic test results without first discussing them with your clinician or pharmacist, who can provide guidance based on your complete clinical picture.
How common is this variant?
The frequency of the rs1295686 alleles varies across different ancestral populations. Specific frequency data for this variant is not universally standardized in all public databases, reflecting the need for continued diverse genomic research.
Frequently asked questions
Does having the rs1295686 variant mean I have allergies?
No, having a specific genotype at this location does not mean you have or will develop allergies. Genetic variants are only one of many factors, including environment and lifestyle, that influence your health.
Can I use this information to change my medication?
You should never change your medication based on genetic information alone. Always consult with your doctor or pharmacist before making any adjustments to your prescribed treatments.
Is rs1295686 a diagnostic test for asthma?
No, this variant is not used as a diagnostic test for asthma. Asthma is diagnosed by healthcare professionals based on clinical symptoms, lung function tests, and medical history.
Where can I find more information about IL13?
You can find reliable information about genes and their functions through resources like MedlinePlus Genetics or the National Institutes of Health. These sites provide peer-reviewed, accessible summaries of human genetics.
Sources & further reading
Educational information only, last refreshed 10/6/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Get my report — $29Related variants in IL13
A well-studied coding missense variant (Arg130Gln) in IL13 that increases receptor affinity, predisposing individuals to elevated IgE levels and atopic reactions.
Located near the IL13 locus, this non-coding variant modulates cytokine production and is associated with allergic rhinitis, atopic asthma, and elevated total serum IgE.
Variant in the TERT gene (often misattributed to IL13 in older literature) associated with cancer risk across multiple populations.
IL13 R110Q alters cytokine signaling; associated with asthma and atopy.