PTGDR2 rs11571288: Understanding Genetic Links to Allergic Traits
The rs11571288 variant is a single nucleotide polymorphism located within the PTGDR2 gene, which encodes a receptor involved in immune cell signaling. Research has statistically associated this variant with various allergic phenotypes, reflecting the complex genetic architecture of immune-related conditions.
What each genotype means
Typical CRTh2 receptor profile
This genotype represents the most common form of the PTGDR2 gene variant in many populations. Research suggests this version of the gene is associated with standard baseline activity of the CRTh2 receptor, which plays a role in immune system responses. It is not considered a high-risk factor for allergic phenotypes in the context of this specific variant.
This is the most frequent genotype observed across most global populations.
Potential allergic sensitivity marker
Carrying one copy of the T allele may be associated with variations in how the immune system responds to allergens. Studies have linked genetic variation in the CRTh2 gene to differences in allergic sensitization and asthma development, though these associations can vary significantly between different ethnic groups. This finding should be viewed as a statistical association rather than a diagnostic indicator.
This heterozygous genotype is found at varying frequencies globally, often appearing in a significant portion of the population depending on ancestry.
Increased allergic sensitivity marker
Carrying two copies of the T allele is sometimes investigated in studies regarding allergic sensitization and asthma risk. While some research indicates this genotype may correlate with altered immune responses, the clinical significance remains complex and dependent on environmental factors and individual genetic background. It is important to remember that genetic associations are only one part of a person's overall health profile.
This genotype is less common than the CC or CT genotypes in most studied populations.
What is rs11571288?
The rs11571288 variant is a specific genetic change, or single nucleotide polymorphism (SNP), located within the PTGDR2 gene. In genomics, a SNP represents a variation at a single position in the DNA sequence among individuals. This particular variant is cataloged in public databases as a polymorphism, meaning it exists in multiple forms within the human population. Scientists study these variations to understand how subtle differences in our genetic code might influence biological processes or susceptibility to certain traits. Because rs11571288 is located within a gene that plays a critical role in immune function, it has become a subject of interest for researchers investigating the genetic underpinnings of allergic diseases and inflammatory responses.
The Role of the PTGDR2 Gene
The PTGDR2 gene provides instructions for creating the CRTh2 receptor, also known as CD294 or GPR44. This receptor is a high-affinity target for prostaglandin D2, a lipid mediator that acts as a signaling molecule in the body. CRTh2 is primarily expressed on specific types of immune cells, including Th2 cells, eosinophils, basophils, and ILC2 cells. These cells are central players in the body's type-2 immune response, which is often involved in allergic inflammation. When the CRTh2 receptor is activated, it helps recruit these immune cells to sites of inflammation, such as the airways in the lungs. Because of this function, the PTGDR2 gene is considered a key component in the biological pathways that mediate asthma and other allergic conditions.
Research and Statistical Associations
Scientific research has investigated the link between PTGDR2 polymorphisms and allergic phenotypes, including asthma and allergic sensitization. Studies have observed statistical associations between variations in this gene and an increased risk of developing these conditions in diverse populations. It is important to note that the evidence for these associations is considered moderate, and the biological impact of any single SNP like rs11571288 is often part of a much larger, polygenic puzzle. While some studies suggest that genetic variability in CRTh2 may influence disease susceptibility, these findings are often specific to certain ancestral groups or clinical cohorts. The field continues to explore how these genetic markers interact with environmental factors to influence health outcomes, emphasizing that genetic associations are statistical probabilities rather than deterministic outcomes.
Population Frequency
The rs11571288 variant is recognized as a common polymorphism, meaning it is found at significant frequencies across many different human populations. Genetic diversity means that the prevalence of specific alleles can vary substantially between groups of different ancestral backgrounds. Researchers often use large-scale genomic databases to track these frequencies, which helps in understanding the evolutionary history and distribution of the variant. Because it is common, it is frequently included in genome-wide association studies (GWAS) that aim to map the genetic architecture of complex traits. Understanding its frequency helps scientists determine whether an observed association is consistent across different global populations or if it is unique to specific demographic groups.
Interpreting Genetic Information
It is essential to approach genetic information with a clear understanding of its limitations. A statistical association between a variant like rs11571288 and a trait does not mean that the variant causes the condition. Many factors, including environment, lifestyle, and thousands of other genetic markers, contribute to the development of allergic phenotypes. Readers should never use this information to self-diagnose or make medical decisions. If you are concerned about asthma, allergies, or your response to specific medications, please consult with a qualified healthcare provider or pharmacist. They can provide personalized guidance based on your clinical history and current health status, rather than relying on isolated genetic data points.
How common is this variant?
The rs11571288 variant is common in many populations, though specific allele frequencies vary across different ancestral groups.
Frequently asked questions
Does having this variant mean I will develop asthma?
No. Genetic variants are associated with statistical probabilities, not certainties. Many factors, including your environment and overall genetic makeup, influence the development of asthma.
Can I use this information to choose an asthma medication?
No. You should never change or choose medications based on genetic data alone. Always discuss your treatment plan and any concerns about medication response with your doctor or pharmacist.
Is this variant the same as a diagnosis?
No. A genetic variant is simply a difference in your DNA sequence. A medical diagnosis can only be made by a healthcare professional based on clinical symptoms and diagnostic testing.
Why do studies show different results for this gene?
Genetic studies often vary due to differences in study design, the ancestral backgrounds of the participants, and the complex nature of allergic traits. These differences are common in genomic research.
Sources & further reading
Educational information only, last refreshed 9/19/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is associated with allergic inflammation and Th2-mediated immune responses.
This variant in the CRTh2 receptor gene is associated with susceptibility to allergic asthma and altered receptor expression levels.
This variant in the CRTH2 receptor gene is associated with susceptibility to allergic diseases and asthma.
Regulatory polymorphism in PTGDR2 (CRTH2) associated with allergic inflammation, eosinophilic airway activation, and asthma susceptibility.