CDKN2B-AS1 rs2157719: Understanding Glaucoma Risk Associations
The rs2157719 variant is a single nucleotide polymorphism located within the CDKN2B-AS1 gene region. Research has identified this variant as being associated with the risk of developing primary open-angle glaucoma and related ocular traits.
What each genotype means
Higher glaucoma risk profile
This genotype is associated with a higher risk of developing primary open-angle glaucoma compared to those carrying the G allele. Research suggests that the A allele may be linked to increased susceptibility in certain populations, though glaucoma is a complex condition influenced by many genetic and environmental factors.
This genotype is common, appearing in a significant portion of the population across various ancestries.
Intermediate glaucoma risk profile
Carrying one copy of the G allele may provide a modest protective effect against primary open-angle glaucoma compared to the AA genotype. Individuals with this profile should continue routine eye examinations, as glaucoma risk is determined by the cumulative effect of multiple genetic variants and clinical factors.
This heterozygous genotype is frequently observed in both Asian and European populations.
Reduced glaucoma risk profile
The G allele at this location has been identified in research as a protective factor associated with a reduced risk of primary open-angle glaucoma, particularly in Asian populations. While this genotype is associated with a lower risk of disease, it does not eliminate the possibility of developing glaucoma, and regular monitoring by an eye care professional remains important.
This genotype is common, with the G allele frequency contributing to a significant percentage of the population in many regions.
What is rs2157719?
The rs2157719 variant is a specific genetic marker, or single nucleotide polymorphism (SNP), located in the non-coding region of the CDKN2B-AS1 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. Because this variant is located in a non-coding region, it does not provide instructions for making a protein directly. Instead, researchers study such variants to understand how they might influence the regulation of nearby genes or contribute to complex biological pathways. The rs2157719 marker has been the subject of various genome-wide association studies (GWAS), which are large-scale research efforts designed to identify links between specific genetic variations and common health conditions or physical traits across large populations.
The Role of CDKN2B-AS1
The CDKN2B-AS1 gene, also known as ANRIL, produces a long non-coding RNA. While it does not code for a protein, this molecule plays a significant role in regulating the expression of neighboring genes, particularly those involved in cell cycle control and senescence, such as CDKN2B and CDKN2A. These genes are critical for maintaining cellular health and preventing uncontrolled cell division. In the context of ocular health, the regulation of these pathways is thought to be important for the maintenance of the optic nerve and the regulation of intraocular pressure. Disruptions or variations in this gene region are hypothesized to influence the susceptibility of ocular tissues to damage, which is a hallmark of conditions like primary open-angle glaucoma.
Research and Evidence Strength
Scientific evidence linking rs2157719 to primary open-angle glaucoma is considered to be of limited to moderate strength. Multiple studies, including those involving the GLAUGEN and NEIGHBOR consortia, have observed statistical associations between this variant and glaucoma-related features, such as the vertical cup-to-disc ratio and intraocular pressure. However, it is important to note that genetic associations do not imply a direct cause-and-effect relationship. Glaucoma is a multifactorial disease influenced by a complex interplay of genetics, environment, and lifestyle factors. While the statistical signal for rs2157719 is consistent across several studies, the actual biological mechanism by which this specific variant contributes to disease risk remains an active area of investigation. The evidence is currently best viewed as a piece of a much larger, ongoing genetic puzzle.
Population Frequency
The rs2157719 variant is relatively common, with its frequency varying across different ancestral backgrounds. Research indicates that the variant is prevalent in both Asian and European populations, often appearing at frequencies between 35% and 50%. Because it is a common variant, it is found in a large portion of the general population, regardless of whether they have been diagnosed with glaucoma. This high frequency underscores the fact that carrying the variant is not a diagnostic indicator of disease. Most individuals who carry this genetic marker will never develop glaucoma, as the development of the condition is influenced by many other genetic and non-genetic factors that are not captured by looking at this single SNP alone.
Interpreting Genetic Information
Understanding your genetic profile regarding rs2157719 should be approached with caution. This information is intended for educational purposes and cannot be used to diagnose, predict, or prevent glaucoma. Because the association between this variant and disease risk is statistical rather than deterministic, it does not provide actionable medical advice. If you have concerns about your eye health, particularly if you have a family history of glaucoma, the most effective approach is to consult with an ophthalmologist or optometrist for regular, comprehensive eye examinations. These clinical assessments are the gold standard for monitoring eye health and managing risk factors like intraocular pressure. Never make changes to your health management or medication based on genetic data without first discussing the findings with a qualified healthcare professional.
How common is this variant?
The rs2157719 variant is common in Asian and European ancestries, with allele frequencies typically ranging between 35% and 50%.
Frequently asked questions
Does having the rs2157719 variant mean I will get glaucoma?
No. Having this variant does not mean you will develop glaucoma. Glaucoma is a complex disease influenced by many genetic and environmental factors, and most people with this variant do not develop the condition.
Should I get tested for rs2157719?
Genetic testing for this specific variant is not a standard clinical practice for diagnosing glaucoma. If you are concerned about your risk, you should schedule a comprehensive eye exam with an eye care professional.
What is the difference between a risk variant and a cause?
A risk variant is a genetic marker associated with a higher statistical likelihood of a condition, whereas a cause is a direct biological trigger. Most genetic variants associated with common diseases are risk factors, not direct causes.
Can I change my risk associated with this gene?
You cannot change your genetic sequence. However, you can manage your overall eye health by attending regular screenings, which allow doctors to detect and treat glaucoma early if it develops.
Sources & further reading
Educational information only, last refreshed 9/28/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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