IL2RA rs2025345: What Your Genotype Means
The rs2025345 variant is a single nucleotide polymorphism located within the IL2RA gene. Research has identified a statistical association between this specific genetic marker and variations in self-reported allergy risk.
What each genotype means
Typical allergy risk profile
This genotype represents the non-risk version of the variant associated with self-reported allergy. Research indicates that individuals without the G allele do not show the specific decrease in allergy risk linked to this genetic marker in population studies.
Carried by approximately 42% of the population, based on the reported G allele frequency of 0.3503.
Slightly reduced allergy risk
This genotype includes one copy of the G allele, which has been associated in genome-wide association studies with a modest decrease in the likelihood of self-reported allergy. This association is statistical in nature and does not account for the complex interplay of environmental and other genetic factors that influence immune responses.
Carried by approximately 46% of the population, based on the reported G allele frequency of 0.3503.
Reduced allergy risk profile
This genotype contains two copies of the G allele, which has been identified in meta-analysis research as a susceptibility locus associated with a decreased risk of self-reported allergy. While this variant is linked to immune-related traits, it is not a diagnostic indicator and should not be used to predict individual health outcomes.
Carried by approximately 12% of the population, based on the reported G allele frequency of 0.3503.
Understanding the rs2025345 Variant
The rs2025345 variant is a single nucleotide polymorphism (SNP) situated on chromosome 10 within the human genome. In genetics, a SNP represents a variation at a single position in a DNA sequence among individuals. This specific variant is located in the IL2RA gene, which provides instructions for creating the alpha subunit of the interleukin-2 receptor. Because this variant is located in a region of the genome that influences gene expression, researchers study it to understand how subtle differences in DNA can contribute to complex traits. It is important to note that rs2025345 is just one of many thousands of variants across the human genome, and its presence does not determine a specific health outcome on its own. Instead, it serves as a marker that scientists use to investigate the biological pathways involved in immune system function and allergic responses.
The Role of the IL2RA Gene
The IL2RA gene encodes the CD25 protein, which is a critical component of the interleukin-2 (IL-2) receptor. This receptor is found on the surface of various immune cells, most notably regulatory T cells (Tregs). Regulatory T cells play a vital role in maintaining immune tolerance by suppressing the activation and expansion of autoreactive T cells, which helps prevent the immune system from attacking the body's own tissues. By controlling the activity of these cells, the IL2RA gene is essential for regulating immune responses and preventing autoimmunity. Because allergies are essentially an overreaction of the immune system to harmless environmental substances, variations in genes that govern immune regulation, such as IL2RA, are frequently studied to understand why some individuals may be more susceptible to allergic conditions than others.
Research and Evidence Strength
The association between rs2025345 and self-reported allergy has been identified through genome-wide association studies (GWAS). These studies compare the genomes of large groups of people to find statistical links between specific variants and traits. The evidence for this association is considered moderate, as GWAS findings often show statistical correlations that require further functional validation to fully understand the underlying biological mechanisms. While some studies have linked this locus to allergy risk, it is important to recognize that allergy is a complex, polygenic trait influenced by many different genes and environmental factors. Therefore, the presence of a particular genotype at this SNP does not guarantee the development of allergies, nor does its absence provide immunity. The scientific community continues to investigate how this variant interacts with other genetic and environmental variables to influence immune health.
Population Frequency
The rs2025345 variant is common across various human populations. According to data from the GWAS Catalog and other genomic databases, the Global Minor Allele Frequency (GMAF) for this variant is approximately 0.3503. This indicates that the variant is widely distributed and present in a significant portion of the population. Because it is a common variant, it is found across diverse ancestral backgrounds, though the exact frequency can vary slightly between different ethnic groups. Understanding these frequencies is a standard part of genetic research, as it helps scientists determine whether a specific variant is rare or common, which in turn informs how they interpret its potential impact on human health and disease susceptibility.
Interpreting Your Genetic Information
Genetic information regarding variants like rs2025345 is intended for educational purposes and should not be used for medical diagnosis or to make health decisions. If you are concerned about allergies or other immune-related symptoms, it is essential to consult with a qualified healthcare professional, such as an allergist or immunologist. They can provide a clinical evaluation based on your medical history, symptoms, and physical examination, which are far more reliable than genetic data alone. You cannot change your genotype, but understanding your health risks can help you and your doctor develop a personalized plan for managing your well-being. Always discuss any questions about your genetic results with a clinician or a genetic counselor who can provide context specific to your individual health situation.
How common is this variant?
The rs2025345 variant is common, with a Global Minor Allele Frequency (GMAF) of approximately 0.3503 across diverse populations.
Frequently asked questions
Does having the G allele mean I will definitely have allergies?
No, having a specific genotype does not guarantee that you will develop allergies. Allergies are complex conditions influenced by a combination of many genetic factors and environmental exposures.
Can I use this information to diagnose an allergy?
No, genetic variants are not diagnostic tools. A clinical diagnosis of an allergy must be made by a healthcare professional based on your symptoms, medical history, and appropriate clinical testing.
What should I do if I am worried about my allergy risk?
If you have concerns about allergies, you should schedule an appointment with an allergist or your primary care physician. They can assess your symptoms and provide appropriate guidance or testing.
Is the IL2RA gene only involved in allergies?
No, the IL2RA gene is involved in broader immune system regulation, including the function of regulatory T cells. It has been studied in the context of various autoimmune conditions and immune-mediated traits.
Sources & further reading
Educational information only, last refreshed 10/3/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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