GJA1 rs11636232: Understanding This Glaucoma-Associated Variant
The rs11636232 variant is a genetic marker located in an intergenic region near the GJA1 gene. It has been identified in scientific studies as having a statistical association with primary open-angle glaucoma and normal tension glaucoma.
What each genotype means
Baseline glaucoma risk
This genotype represents the common baseline state for this genetic location. Research indicates that individuals with this genotype do not carry the specific variant associated with increased susceptibility to primary open-angle glaucoma in this region. Please note that glaucoma risk is multifactorial and influenced by many other genetic and environmental factors.
This is the most common genotype in many global populations, though frequency varies significantly by ancestry.
Increased glaucoma risk marker
Carrying one copy of this variant has been associated in genome-wide studies with a modest increase in the risk of developing primary open-angle glaucoma. This association is based on statistical trends observed in large population studies and does not indicate a diagnosis. You should discuss your overall eye health and any concerns about glaucoma risk with your ophthalmologist.
This genotype is observed at a moderate frequency, particularly in East Asian populations where the minor allele is more prevalent.
Elevated glaucoma risk marker
Carrying two copies of this variant is associated with a higher statistical likelihood of primary open-angle glaucoma compared to those without the variant. This finding is based on large-scale genetic association studies, but it is not a clinical diagnosis. Because glaucoma is a complex condition, you should consult with an eye care professional to discuss regular screenings and personalized risk management.
This genotype is less common than the heterozygous state, with a frequency that reflects the minor allele prevalence of approximately 0.20 in East Asian populations.
What is rs11636232?
The rs11636232 variant is a single nucleotide polymorphism (SNP), which is a variation at a single position in the DNA sequence. This specific SNP is classified as intergenic, meaning it is located in the non-coding DNA sequence between genes rather than within a gene itself. While it does not code for a protein directly, intergenic variants are often studied for their potential role in regulating the expression of nearby genes. In the case of rs11636232, it is situated in close proximity to the GJA1 gene. Researchers use these markers to identify regions of the genome that may influence susceptibility to complex traits or diseases. Because it is a non-coding variant, its exact biological mechanism remains a subject of ongoing investigation, and it is currently viewed as a statistical signal rather than a direct cause of disease.
The Role of the GJA1 Gene
The GJA1 gene provides instructions for making a protein called connexin 43 (Cx43). This protein is a key component of gap junctions, which are specialized channels that allow for the direct exchange of ions, signaling molecules, and nutrients between adjacent cells. Gap junctions are essential for maintaining cellular communication and homeostasis in various tissues throughout the body. In the context of ocular health, proper cellular communication is vital for the function of the optic nerve and the regulation of intraocular pressure. While rs11636232 is not located inside the GJA1 gene, its proximity suggests that it might influence how this gene is turned on or off in specific tissues. Understanding how GJA1 functions helps researchers hypothesize how regulatory variants nearby might contribute to the complex biological pathways involved in eye health and the development of glaucoma.
Research and Evidence Strength
The association between rs11636232 and glaucoma is based on genome-wide association studies (GWAS), which compare the DNA of individuals with a condition to those without it to find common genetic patterns. Current evidence linking this variant to primary open-angle glaucoma and normal tension glaucoma is considered limited. This means that while a statistical correlation has been observed in some studies, the variant does not act as a definitive diagnostic tool. Glaucoma is a multifactorial disease, meaning it is influenced by a combination of genetic, environmental, and lifestyle factors. Because the evidence is limited, this SNP should not be used to predict an individual's risk of developing glaucoma. Genetic associations are often population-specific, and further research is required to determine if this variant plays a functional role in the disease process or if it is simply a marker inherited alongside other, more influential genetic factors.
What This Information Means for You
It is important to understand that having a specific genotype for rs11636232 does not mean you will develop glaucoma, nor does it mean you are immune to it. Genetic variants identified in research studies represent statistical probabilities across large groups of people, not individual medical predictions. If you are concerned about your eye health or have a family history of glaucoma, the most effective step is to consult with an ophthalmologist or optometrist for regular, comprehensive eye exams. These clinical evaluations are the gold standard for monitoring eye pressure and optic nerve health. You cannot change your genetic code, but you can manage your health through proactive clinical care. Always discuss any questions regarding genetic testing or disease risk with a qualified healthcare professional who can interpret results within the context of your personal and family medical history.
How common is this variant?
The rs11636232 variant has a minor allele frequency of approximately 0.20 in East Asian populations, making it a relatively common genetic marker in that demographic.
Frequently asked questions
Can I use this SNP to predict if I will get glaucoma?
No. This variant is associated with glaucoma in large-scale statistical studies, but it is not a diagnostic test. Glaucoma is a complex disease influenced by many genes and environmental factors, and this SNP alone cannot predict individual risk.
Is rs11636232 a mutation that causes disease?
No, it is a common genetic variant, not a disease-causing mutation. Most people carry one of the common genotypes for this SNP without ever developing glaucoma.
Should I get tested for this variant?
There is no clinical benefit to testing for this specific SNP. If you are concerned about glaucoma, you should schedule a comprehensive eye exam with an eye care professional, which is the only way to accurately assess your eye health.
What does 'intergenic' mean?
Intergenic means the variant is located in the DNA sequence between genes. It does not code for a protein, but it may play a role in regulating how nearby genes are expressed.
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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