PCDH15 rs10825269: What Your Genotype Means
The rs10825269 variant is a common genetic change located within the PCDH15 gene. While this gene is primarily known for its role in hearing and vision, this specific variant has been studied for its potential associations with lipid traits, such as triglyceride and apolipoprotein B levels.
What each genotype means
Typical risk profile
This is the most common genotype observed in most populations. Research into PCDH15 variants often focuses on rare, highly damaging mutations that cause Usher syndrome or nonsyndromic hearing loss; this specific common variant is generally considered benign in that context. While some studies have explored associations between PCDH15 polymorphisms and complex traits like irritable bowel syndrome or lipid levels, this genotype does not indicate a known medical predisposition.
Carried by the majority of the global population.
Common variant carrier
Carrying one copy of the T allele is common and, based on current evidence, is classified as benign or likely benign regarding the development of Usher syndrome or hereditary hearing loss. Some research has investigated whether common PCDH15 variants might contribute to minor differences in lipid levels or susceptibility to irritable bowel syndrome, but these associations are complex, involve many other genetic and environmental factors, and are not predictive of clinical outcomes for an individual.
Carried by roughly 1 in 3 people globally, though frequencies vary by ancestry.
Common variant carrier
Similar to the CT genotype, carrying two copies of the T allele is not associated with the severe clinical phenotypes that are linked to rare, pathogenic PCDH15 mutations. While this variant has been identified in genomic studies as potentially influencing lipid levels or irritable bowel syndrome susceptibility, these effects are small and part of a broader, polygenic landscape. You should not consider this genotype a cause for medical concern, and standard health maintenance remains the best course of action.
Carried by approximately 1 in 20 to 1 in 10 people, depending on ancestry.
Understanding the rs10825269 Variant
The rs10825269 variant is a single nucleotide polymorphism (SNP) located within the PCDH15 gene on chromosome 10. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is classified as a missense mutation, meaning the change in the DNA sequence results in a different amino acid being incorporated into the protein produced by the gene. While many variants in the PCDH15 gene are investigated for their roles in rare, inherited sensory conditions, rs10825269 is frequently studied in the context of common metabolic traits. It is important to note that this variant is distinct from the pathogenic mutations that cause severe, rare conditions like Usher syndrome, and it is generally considered benign in clinical diagnostic settings.
The Role of the PCDH15 Gene
The PCDH15 gene provides instructions for making a protein called protocadherin-15. This protein is a member of the cadherin superfamily, which are proteins that help cells adhere to one another. Protocadherin-15 is essential for the normal development and function of the inner ear and the retina. In the inner ear, it helps form the tip links that connect the hair bundles of sensory cells, which are necessary for converting sound waves into electrical signals. In the eye, it plays a role in the structural integrity of photoreceptor cells. Because of these critical functions, mutations that severely disrupt the function of this protein can lead to Usher syndrome type 1F, a condition characterized by profound hearing loss and progressive vision loss. However, common variants like rs10825269 do not typically cause these severe sensory impairments.
Research and Lipid Associations
Scientific research has explored whether common variants in PCDH15 might influence metabolic health. Specifically, studies have investigated the association between rs10825269 and lipid traits, such as triglyceride levels, apolipoprotein B, and total cholesterol. Some research, particularly in families with familial combined hyperlipidemia, has observed statistical associations between this variant and these lipid markers. However, the evidence for these associations is considered limited. While some studies have reported significant p-values in specific populations, these findings are not always consistent across different ethnic groups or larger, more diverse cohorts. It is important to interpret these findings as statistical associations rather than direct causation. The biological mechanism by which a protein involved in cell adhesion might influence systemic lipid metabolism remains an area of ongoing scientific inquiry and is not yet fully understood.
Population Frequency and Interpretation
The rs10825269 variant is relatively common in the general population. Data from large-scale genomic databases, such as the 1000 Genomes Project and gnomAD, indicate that the minor allele (T) has a frequency of approximately 0.21, or 21%, across global populations. This means that a significant portion of the population carries at least one copy of this variant. Because it is so common, it is considered a normal part of human genetic variation rather than a rare disease-causing mutation. When reviewing genetic reports, it is helpful to remember that common variants often have very small individual effects on health traits. This information should not be used to diagnose any condition or to make medical decisions. If you have concerns about your lipid levels or cardiovascular health, it is essential to discuss these with a healthcare provider who can evaluate your overall health profile.
How common is this variant?
The minor allele (T) of rs10825269 has a frequency of approximately 0.21 across global populations, making it a common genetic variant.
Frequently asked questions
Is rs10825269 associated with Usher syndrome?
No, rs10825269 is not considered a cause of Usher syndrome. ClinVar classifies this variant as benign or likely benign, meaning it is not associated with the severe sensory impairments characteristic of Usher syndrome.
Should I be worried if I have the T allele?
No, there is no reason for concern. The T allele is a common genetic variation found in a large percentage of the healthy population and is not a diagnostic marker for any disease.
Can this variant predict my cholesterol levels?
While some research has identified statistical associations between this variant and lipid traits, it is not a reliable predictor of your personal cholesterol levels. Lipid levels are influenced by a complex combination of many genetic factors, diet, lifestyle, and environment.
What should I do if my genetic report mentions this SNP?
You do not need to take any specific action. This variant is a common, benign finding. If you are concerned about your cardiovascular health or lipid profile, consult your doctor for standard screening and personalized medical advice.
Sources & further reading
Educational information only, last refreshed 10/27/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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