LILRA3 rs434124: What Your Genotype Means
The rs434124 variant is a single nucleotide polymorphism located near the LILRA3 gene on chromosome 19. Research has identified this variant as a genetic marker associated with chronic spontaneous urticaria and broader autoimmune processes.
What each genotype means
Typical LILRA3 expression
This genotype represents the common genetic state for the LILRA3 gene. Research indicates that variants in this region are associated with chronic spontaneous urticaria and show genetic overlap with various autoimmune processes, though the specific functional impact of this genotype remains a subject of ongoing study.
This is the most common genotype observed across most global populations.
Variant-associated genotype
Carrying one copy of the variant allele is associated with chronic spontaneous urticaria in some genome-wide association studies. Because this variant is linked to broader autoimmune pathways, it is considered a marker of genetic susceptibility rather than a direct cause of disease. Please discuss any concerns regarding chronic urticaria or autoimmune symptoms with your healthcare provider.
This heterozygous genotype is found at variable frequencies depending on ancestral background.
Increased variant association
This genotype is associated with an increased statistical signal for chronic spontaneous urticaria in large-scale genetic studies. The LILRA3 gene is involved in immune cell regulation, and this variant may influence how your immune system responds to triggers. This association is based on population-level data and does not imply a diagnosis; consult a clinician for personalized medical advice.
This genotype is less common than the homozygous reference state and varies significantly by ancestry.
Understanding the rs434124 Variant
The rs434124 variant is a specific change in the DNA sequence located approximately 5.1 kilobases from the LILRA3 gene on chromosome 19q13.4. In genetics, a single nucleotide polymorphism (SNP) like rs434124 represents a variation at a single position in the genome. This particular site is recognized as a strong cis-expression quantitative trait locus (eQTL), meaning it influences how much of the LILRA3 protein is produced in specific tissues. Scientific studies have observed that this variant acts as a regulatory signal in whole blood, monocytes, and CD4+ T cells. Because these cells are central to the human immune response, variations in this region are of significant interest to researchers studying how the body regulates inflammation and immune system activity.
The Role of the LILRA3 Gene
The LILRA3 gene encodes a protein known as leukocyte immunoglobulin-like receptor A3. Unlike many other members of the LILR family, the LILRA3 protein lacks a transmembrane domain, meaning it is secreted rather than anchored to the cell surface. While its exact biological function remains a subject of ongoing research, it is known to bind to human leukocyte antigen (HLA) class I molecules. This interaction suggests that LILRA3 plays a role in modulating immune signaling. The gene is notably polymorphic, with some individuals carrying a large deletion that results in a complete lack of LILRA3 protein expression. This structural variation is common across many human populations, and scientists continue to investigate how both the presence of the protein and its absence influence susceptibility to various inflammatory and autoimmune conditions.
Research Associations and Evidence Strength
Current evidence linking rs434124 to health traits is considered limited and primarily based on statistical associations found in genome-wide association studies (GWAS). Research has identified rs434124 as a risk locus for chronic spontaneous urticaria, a condition characterized by recurring hives. The association suggests a shared genetic architecture between this skin condition and other autoimmune diseases. However, it is important to note that these findings represent statistical correlations across large groups of people rather than direct causation for any individual. Furthermore, the strength of these associations can vary significantly depending on the ancestry of the population being studied. Because the evidence is still evolving, these findings are best viewed as part of a broader, complex picture of how immune-related genes contribute to human health and disease susceptibility.
Interpreting Your Genetic Information
If you have received information about your rs434124 genotype, it is helpful to understand that this is a common variation found in the general population. Genetic associations with complex traits like chronic spontaneous urticaria are rarely determined by a single SNP; instead, they involve the interplay of many genes, environmental factors, and lifestyle influences. You cannot use this information to diagnose a medical condition or predict your future health. If you are experiencing symptoms such as chronic hives or other immune-related concerns, the most effective step is to consult with a qualified healthcare provider or a dermatologist. They can evaluate your clinical history and symptoms, which are far more predictive of your health status than any single genetic variant. Always discuss any health concerns with a professional rather than relying on genetic data alone.
How common is this variant?
The frequency of the rs434124 variant and the associated LILRA3 gene deletion varies significantly by ancestry, with the deletion being notably more common in East Asian populations compared to European or African populations.
Frequently asked questions
Is rs434124 a diagnostic test for urticaria?
No, rs434124 is not a diagnostic test. It is a genetic marker associated with a statistical increase in risk for certain conditions in population studies, but it cannot determine if an individual will develop a disease.
What should I do if I have the 'risk' genotype?
Having a specific genotype does not mean you will develop a disease. You should focus on your overall health and consult a doctor if you have specific symptoms, rather than worrying about a single genetic variant.
Does this variant affect how I respond to medication?
There is no current evidence that rs434124 dictates specific medication responses. Always discuss any concerns about your medications or dosing with your clinician or pharmacist.
Why is the LILRA3 gene considered polymorphic?
The LILRA3 gene is considered polymorphic because it exists in different forms across the human population, including a common structural variation where the entire gene is deleted in some individuals.
Sources & further reading
Educational information only, last refreshed 10/11/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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