CDKN2B-AS1 rs6475609: What Your Genotype Means
The rs6475609 variant is a common genetic change located within the CDKN2B-AS1 gene. Research has identified this specific site as being associated with extreme human longevity in various population studies.
What each genotype means
Baseline longevity profile
This genotype represents the more common state for this variant in many populations. Research has explored this variant's role in extreme longevity and ocular health, though associations are complex and not definitive for any individual. Please consult with a healthcare professional if you have concerns regarding age-related health or glaucoma risk.
This is a common genotype, though its frequency varies significantly across different global ancestral populations.
Longevity-associated variant carrier
Carrying one copy of the C allele has been studied in the context of extreme longevity and certain ocular traits like cup-to-disc ratio. These associations are statistical in nature and do not predict individual health outcomes. Discuss any specific health concerns or family history with your clinician.
This heterozygous genotype is found in a significant portion of the population, with frequencies differing by ancestry.
Longevity-associated variant homozygous
This genotype has been identified in studies investigating genetic markers for extreme longevity and specific eye-related endophenotypes. Because these findings are based on population-level associations rather than individual diagnostics, they should not be used to predict your personal health trajectory. Please speak with a medical professional regarding any health-related questions.
This genotype is observed across various populations, with its prevalence being notably variable depending on ancestral background.
Understanding the rs6475609 Variant
The rs6475609 variant is a single nucleotide polymorphism (SNP) situated within the CDKN2B-AS1 gene, which is located on chromosome 9p21. This region of the human genome is well-known for housing the CDKN2B-CDKN2A gene cluster, a critical area involved in cell cycle regulation. As an intronic variant, rs6475609 does not change the protein-coding sequence of a gene directly, but rather sits within a non-coding region that may influence how nearby genes are expressed. In genetic research, this variant is frequently studied to understand how subtle differences in our DNA sequence might contribute to complex human traits, such as the ability to reach an advanced age. Because it is located in a region associated with various health outcomes, it remains a subject of interest for researchers investigating the genetic architecture of human aging and disease susceptibility.
The Role of the CDKN2B-AS1 Gene
The CDKN2B-AS1 gene, also known as ANRIL, produces a long non-coding RNA (lncRNA). Unlike messenger RNA, which provides instructions for building proteins, lncRNAs like those produced by CDKN2B-AS1 act as functional molecules that regulate other genes. Specifically, the product of this gene interacts with polycomb repressive complexes, which are responsible for epigenetic silencing—a process that effectively turns off certain genes. By modulating the expression of the nearby CDKN2A and CDKN2B genes, CDKN2B-AS1 plays a significant role in controlling cell division, senescence, and apoptosis. Because these processes are fundamental to how cells age and how they respond to stress or damage, variations in this gene are often investigated for their potential impact on age-related conditions, including cardiovascular health and cancer progression.
Research on Longevity and Health
The association between rs6475609 and extreme longevity has been observed in genome-wide association studies (GWAS). Researchers have analyzed cohorts of centenarians and long-lived individuals to identify genetic markers that appear more frequently in those who survive to the 99th percentile of age. While rs6475609 has shown statistical signals of association with longevity, it is important to note that the evidence is considered moderate. In some studies, the association has approached, but not always reached, the strict threshold for genome-wide significance. Furthermore, the impact of this variant can vary significantly depending on the ancestry of the population being studied. While some data suggests a link to parental survival and longevity, other studies have found no significant difference in allele frequency between long-lived groups and controls, highlighting the complexity and potential ancestry-specific nature of these genetic findings.
Interpreting Your Genetic Information
It is important to understand that genetic variants like rs6475609 represent only a tiny fraction of the factors that influence human health and lifespan. Longevity is a complex trait influenced by a vast interplay of genetics, environment, lifestyle, and chance. Having a specific genotype at this location does not determine your lifespan, nor does it serve as a diagnostic tool for any medical condition. Because the scientific evidence regarding this variant is mixed and often specific to certain populations, it should not be used to make health decisions or predictions. If you have questions about your genetic results or concerns about your health, the most appropriate course of action is to consult with a qualified healthcare provider or a genetic counselor. They can help you interpret your information within the context of your overall health history and current medical guidelines.
How common is this variant?
The frequency of the A and G alleles for rs6475609 varies across different global populations, and researchers often observe distinct patterns of inheritance depending on ancestral background.
Frequently asked questions
Does rs6475609 mean I will live to be 100?
No. Longevity is a complex trait influenced by many genetic and environmental factors. This variant is only one small piece of a much larger puzzle and cannot predict your individual lifespan.
Is rs6475609 a disease-causing mutation?
No, rs6475609 is a common genetic variant, not a disease-causing mutation. It is a natural variation in the human genome that has been studied for its potential association with longevity and other traits.
Should I be worried if I have the G allele?
There is no reason for concern. Genetic variants are common, and having a specific allele is a normal part of human genetic diversity. This variant is not used for clinical diagnosis.
Where can I find more information on CDKN2B-AS1?
You can find reliable information on the CDKN2B-AS1 gene through the NCBI Gene database or the NIH Genetic Testing Registry. These resources provide detailed summaries of gene function and associated research.
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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