IL18 rs795467: Understanding This Genetic Variant
The rs795467 variant is a genetic change located within the IL18 gene, which provides instructions for producing a key pro-inflammatory cytokine. Research has explored its potential association with susceptibility to atopic dermatitis and allergic sensitization, though the evidence remains limited.
What each genotype means
Typical IL18 genetic profile
This genotype represents the homozygous state for the major allele at this position in the IL18 gene. While research has linked variations in the IL18 gene to atopic dermatitis susceptibility, the specific functional impact of this variant remains limited and requires further study to determine its clinical relevance. You should discuss any concerns regarding skin health or inflammatory conditions with a qualified healthcare provider.
This genotype is common across most global populations, though exact frequencies vary significantly by ancestral background.
Common IL18 genetic variant
This genotype indicates you carry one copy of each allele at this location in the IL18 gene. Studies have explored the role of IL18 in inflammatory skin conditions like atopic dermatitis, but the evidence linking this specific variant to disease risk is currently limited and not definitive. Please consult with a medical professional if you have questions about your skin health or potential genetic predispositions.
This heterozygous genotype is frequently observed in diverse populations worldwide.
Variant IL18 genetic profile
This genotype represents the homozygous state for the minor allele at this position. Although the IL18 gene is known to be involved in immune regulation and skin inflammation, the association between this specific variant and atopic dermatitis is considered limited in current scientific literature. This result should not be used for diagnostic purposes; please speak with a clinician regarding any personal health concerns.
This genotype is found at varying frequencies globally, generally appearing in a significant portion of the population depending on ancestral heritage.
What is the rs795467 Variant?
The rs795467 variant is a single nucleotide polymorphism (SNP) situated within the IL18 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is found within the genomic region that encodes interleukin-18, a protein that plays a significant role in the human immune system. Because this variant is located in a gene involved in inflammatory pathways, researchers have investigated whether it might influence how the body responds to environmental triggers or allergens. It is important to note that identifying a SNP does not mean it is the direct cause of a condition; rather, it serves as a marker that scientists study to understand the complex genetic architecture of immune-related traits. Genetic variations like rs795467 are common, and their presence is a normal part of human genetic diversity.
The Role of the IL18 Gene
The IL18 gene encodes interleukin-18, a potent pro-inflammatory cytokine. Cytokines are signaling proteins that help cells communicate during an immune response. Interleukin-18 is primarily involved in regulating both innate and acquired immune responses, including the activation of T-helper 1 (Th1) cells and natural killer (NK) cells. Beyond its role in fighting infections, IL-18 is also implicated in epithelial barrier repair and the regulation of inflammation. Because of its central role in the immune system, dysregulation of IL-18 signaling is a subject of intense study in various inflammatory diseases. In the context of skin health, IL-18 has been shown to contribute to inflammatory processes that can lead to skin lesions. Understanding how the IL18 gene functions provides the necessary biological context for why researchers look at variants within this gene when studying conditions like atopic dermatitis.
Research and Evidence Strength
Scientific research into rs795467 has primarily focused on its potential association with atopic dermatitis and allergic sensitization. Atopic dermatitis is a chronic inflammatory skin disease characterized by pruritus and a complex genetic background. While some studies have suggested a link between variants in or near the IL18 gene and these conditions, the evidence strength for rs795467 specifically is considered limited. Genome-wide association studies (GWAS) often identify regions of interest, but these signals indicate an association rather than a definitive causal relationship. The precise functional consequences of this variant—such as whether it alters IL-18 expression or receptor signaling—remain unclear. Because inflammatory conditions are influenced by a combination of many genetic factors and environmental exposures, it is difficult to isolate the effect of a single SNP. Consequently, findings regarding this variant should be viewed as preliminary and part of a broader, ongoing investigation into immune-related genetics.
What You Can Do With This Information
Information about genetic variants like rs795467 is primarily intended for educational and research purposes. It is important to understand that having a specific genotype for this variant does not constitute a medical diagnosis, nor does it predict the development of any condition. Atopic dermatitis and other allergic conditions are multifactorial, meaning they result from a complex interplay of genetics, lifestyle, and environment. If you are concerned about skin health, allergies, or inflammatory symptoms, the most effective approach is to consult with a qualified healthcare professional or a dermatologist. They can provide personalized medical advice, diagnostic testing, and evidence-based treatment plans tailored to your specific health history. Avoid making health decisions based solely on genetic data, as these results lack the clinical context necessary for medical management. Always prioritize professional clinical guidance over individual genetic markers.
How common is this variant?
The rs795467 variant is relatively common, with a minor allele frequency typically ranging between 0.30 and 0.45 across various global populations.
Frequently asked questions
Is rs795467 a cause of atopic dermatitis?
No, rs795467 is not considered a direct cause of atopic dermatitis. It is a genetic variant that has been studied for its potential association with the condition, but atopic dermatitis is a complex disease influenced by many genetic and environmental factors.
Should I get tested for the IL18 rs795467 variant?
There is no clinical utility in testing for this specific variant for diagnostic purposes. Because the evidence linking it to disease is limited, it does not provide actionable information for managing your health.
What does the IL18 gene do?
The IL18 gene provides instructions for making a protein called interleukin-18, which is a cytokine that helps regulate the immune system. It plays a role in inflammation and the body's defense against infections.
Can I change my risk if I have a certain genotype?
Genetic variants are inherited and cannot be changed. However, managing your health through lifestyle choices and working with a healthcare provider is the best way to address concerns about inflammatory conditions.
Sources & further reading
Educational information only, last refreshed 9/18/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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