IL1B rs1143627: Understanding This Inflammatory Cytokine Variant
The rs1143627 variant is a common genetic change located within the IL1B gene, which provides instructions for making a key pro-inflammatory protein. Research has linked this variant to differences in cytokine production and potential susceptibility to various inflammatory and immune-related conditions.
What each genotype means
Typical IL1B promoter profile
This genotype represents the C allele at the rs1143627 position in the IL1B promoter region. Research has investigated this variant for its potential role in modulating cytokine production and susceptibility to various inflammatory and clinical conditions, though findings are often context-dependent and vary across different populations. This result does not provide a medical diagnosis, and any concerns regarding inflammatory health should be discussed with a healthcare professional.
The C allele is common, and this genotype is frequently observed across global populations.
Varied IL1B promoter profile
This genotype indicates you carry one copy of the C allele and one copy of the T allele at the rs1143627 position. Studies have explored associations between this variant and altered brain structure volumes or susceptibility to specific inflammatory conditions, but these associations are complex and not definitive for any individual. This information is for educational purposes and should not be used to guide medical decisions without consulting a clinician.
This heterozygous genotype is common in many populations, reflecting the widespread distribution of both the C and T alleles.
Alternative IL1B promoter profile
This genotype represents the T allele at the rs1143627 position, which is located in the promoter region of the IL1B gene. While some research suggests this variant may influence immune response or disease susceptibility, the clinical significance remains a subject of ongoing study and varies by ancestry and environmental factors. Please consult with a healthcare provider to discuss any health concerns, as this genotype alone does not determine your overall health risk.
The T allele is present at significant frequencies globally, making this genotype a common variation in many human populations.
What is rs1143627?
The rs1143627 variant is a single nucleotide polymorphism (SNP) located on chromosome 2 within the IL1B gene. In genetics, a SNP represents a variation at a single position in the DNA sequence. This specific variant involves a change where the nucleotide base can be either cytosine (C) or thymine (T). Because it is located within the IL1B gene, researchers study it to understand how it might influence the expression or function of the protein that the gene encodes. It is considered a common variant, meaning it appears frequently across diverse human populations. Scientists often track such variants to determine if they correlate with specific biological traits or health outcomes, though the presence of a variant does not guarantee a specific health result.
The Role of the IL1B Gene
The IL1B gene encodes interleukin-1 beta, a potent pro-inflammatory cytokine. Cytokines are small proteins that act as chemical messengers, playing a critical role in the body's immune response. When the body detects an infection or tissue damage, activated macrophages and other immune cells produce interleukin-1 beta to trigger inflammation. This process is essential for fighting off pathogens and initiating tissue repair. However, because inflammation is a powerful tool, its regulation must be precise. If the production of interleukin-1 beta is too high or too low, it can impact how the body manages immune challenges. By studying variants like rs1143627, researchers aim to understand if subtle genetic differences contribute to the natural variation in how individuals produce this cytokine and respond to inflammatory stimuli.
Research and Associations
Scientific literature has investigated rs1143627 in the context of various health conditions, ranging from susceptibility to infections like H1N1 influenza to structural brain differences and inflammatory diseases. For example, some studies have explored its association with gastric cancer risk following H. pylori infection, while others have looked at its potential influence on brain region volumes in bipolar disorder. It is important to note that the evidence for these associations is often mixed or limited to specific populations. Many findings are based on observational studies, which show correlations rather than direct causation. Because immune responses are complex and influenced by many genes and environmental factors, a single SNP like rs1143627 rarely acts as a sole determinant for a disease. Current research continues to evaluate how this variant interacts with other genetic and environmental triggers.
Population Frequency
The rs1143627 variant is widely distributed across global populations. Data from large-scale genomic projects indicate that both the C and T alleles are common, though their exact frequencies can vary significantly depending on ancestral background. For instance, some studies have noted that the C allele is particularly prevalent in certain East Asian populations. Because it is a common variant, it is found in a large portion of the general population, which is why it is frequently included in genetic association studies. Understanding these frequency differences is vital for researchers, as it helps them account for population structure when analyzing whether a specific genetic variant is truly linked to a health trait or if the association is a result of ancestral patterns.
Interpreting Your Genetic Information
If you have information about your rs1143627 genotype, it is important to view it within the context of your overall health. Genetic variants are only one piece of a much larger puzzle that includes your environment, lifestyle, and other genetic factors. Having a specific genotype does not mean you will develop a particular condition, nor does it provide a diagnosis. If you are concerned about inflammatory conditions or your immune health, the most effective approach is to consult with a qualified healthcare professional. They can help you interpret your health history and determine if any clinical testing or lifestyle adjustments are appropriate. Never use genetic data to make medical decisions or change treatments without professional guidance. Always discuss any health-related questions with your doctor or a genetic counselor who can provide personalized, evidence-based advice.
How common is this variant?
The rs1143627 variant is common across global populations, with allele frequencies varying by ancestry.
Frequently asked questions
Is rs1143627 a diagnostic test for disease?
No, rs1143627 is not a diagnostic test. It is a common genetic variant associated with statistical trends in research, not a definitive indicator of whether you will develop a specific disease.
What does the IL1B gene do?
The IL1B gene provides instructions for making interleukin-1 beta, a protein that helps regulate the body's inflammatory response to infection and injury.
Should I be worried if I have the T/T genotype?
No, you should not be worried. Genetic variants are common and are only one of many factors that influence health. Consult a healthcare provider if you have specific concerns about your immune health.
Can I change my genetic risk for this variant?
You cannot change your DNA. However, you can focus on overall health and wellness, which are influenced by many factors beyond your genetics, such as diet, exercise, and medical care.
Sources & further reading
Educational information only, last refreshed 9/30/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This SNP is recognized as a modifier of inflammatory response, potentially affecting responses to anti-TNF therapies.
Promoter single nucleotide polymorphism influencing baseline inducible interleukin-1 beta transcriptional activity and inflammatory response phenotypes.
Interleukin-1 beta variant associated with systemic inflammatory markers and potential modulation of dietary response.
Promoter variant (c.-511C>T) in the IL1B gene extensively studied for regulatory influence on interleukin-1 beta expression and chronic inflammatory states.
Promoter regulatory single-nucleotide variant in interleukin-1 beta associated with altered inflammatory cytokine secretion and chronic inflammation predisposition.
This polymorphism in the interleukin-1 beta gene has been studied for its role in the pharmacogenomics of apremilast response in patients with psoriasis.