CFH rs1329428: Understanding Genetic Associations with AMD
The rs1329428 variant is a single nucleotide polymorphism located within the CFH gene, which plays a critical role in the body's immune response. Research has identified this variant as being associated with an increased risk of developing age-related macular degeneration (AMD).
What each genotype means
Typical genetic profile
This genotype represents the most common form of this variant found in many human populations. Current scientific literature does not associate this specific genetic sequence with any significant clinical traits or health conditions. It is considered a standard variation in the human genome.
This is the most prevalent genotype observed across most global populations.
Typical genetic profile
Carrying one copy of each allele at this location is a common occurrence in the general population. There is no established evidence in current genomic research to suggest that this combination results in a distinct clinical phenotype or health impact. It is generally regarded as a neutral genetic variation.
This genotype is found at varying frequencies depending on ancestral background but is generally common.
Typical genetic profile
This genotype is a standard variation observed in the human genome. Research has not identified any specific health-related associations or clinical significance linked to this particular allele pair. It is considered a normal part of human genetic diversity.
This genotype is observed frequently across diverse populations, though specific frequency percentages vary by ancestry.
What is rs1329428?
A single nucleotide polymorphism, or SNP, is a variation at a single position in a DNA sequence among individuals. The variant rs1329428 is located on chromosome 1 within the CFH gene. This gene provides instructions for making the complement factor H protein, which is a key regulator of the complement system—a part of the immune system that helps clear pathogens and damaged cells. Because this SNP is located within a gene involved in inflammation and immune regulation, researchers have long studied its potential impact on various health conditions. When scientists identify a SNP like rs1329428, they are looking for statistical correlations between specific DNA letters at that location and the presence or absence of a particular trait or disease in large groups of people.
The Role of the CFH Gene
The CFH gene is essential for maintaining the balance of the complement system, preventing it from becoming overactive and damaging the body's own healthy tissues. In the eye, the complement system is involved in the maintenance of the retina. When the CFH gene functions optimally, it helps protect the eye from chronic inflammation. Variations in this gene, including those that may be linked to rs1329428, can alter the structure or function of the complement factor H protein. If this protein is less effective at regulating the immune response, it may lead to an accumulation of cellular debris in the retina, which is a hallmark of age-related macular degeneration. Understanding this biological pathway is a major focus of current ophthalmological and genetic research.
Research and Evidence Strength
The association between rs1329428 and age-related macular degeneration (AMD) has been documented in multiple genome-wide association studies. These studies compare the genomes of individuals with AMD to those without the condition to identify genetic markers that appear more frequently in the affected group. The evidence for this association is considered moderate to strong in certain populations, particularly among individuals of European descent. However, it is important to note that genetic associations can vary significantly across different ancestral backgrounds. For instance, some studies have indicated that the impact of CFH variations on AMD risk may differ between Caucasian and Japanese cohorts. As with many complex traits, AMD is influenced by a combination of multiple genetic factors and environmental influences, such as smoking and diet, rather than a single variant alone.
Population Frequency
The frequency of the G allele at the rs1329428 position varies across different global populations. According to data from large-scale genomic databases, the global minor allele frequency is approximately 0.44, though this can fluctuate depending on the specific ancestry of the population being studied. Because this variant is relatively common, it is frequently included in genetic research panels investigating eye health. It is important to remember that having a specific genotype does not guarantee the development of a condition; rather, it represents a statistical increase in risk compared to the general population. Genetic risk is only one piece of the puzzle, and population-level statistics cannot predict an individual's specific health outcome.
What You Can Do With This Information
If you have received information about your rs1329428 genotype, it is important to view it as a data point rather than a medical diagnosis. Genetic testing for common variants like this one is often used for research purposes and does not replace a clinical evaluation. If you are concerned about your risk for age-related macular degeneration, the most effective step is to schedule a comprehensive eye exam with an ophthalmologist or optometrist. They can assess your actual eye health, discuss your family history, and provide personalized recommendations for monitoring or lifestyle changes. Never use genetic information to make decisions about your health or medical care without consulting a qualified healthcare professional. They are the only ones who can interpret your results in the context of your overall health and clinical history.
How common is this variant?
The G allele is relatively common, with a global minor allele frequency of approximately 0.44, though frequencies vary significantly by ancestry.
Frequently asked questions
Does having the G/G genotype mean I will get macular degeneration?
No, having the G/G genotype does not mean you will develop macular degeneration. It is a statistical association, meaning the risk is higher compared to those without the variant, but many other genetic and environmental factors contribute to the disease.
Can I change my risk associated with rs1329428?
You cannot change your genotype, but you can manage your overall risk for eye disease. Factors such as smoking cessation, a healthy diet, and regular eye exams are recommended by eye health professionals to maintain vision.
Is rs1329428 the only gene involved in AMD?
No, age-related macular degeneration is a complex, polygenic condition. Many different genes and environmental factors contribute to the risk of developing the disease, and rs1329428 is just one of many markers identified by researchers.
Should I get tested for this SNP?
Genetic testing for this SNP is generally not recommended for routine clinical care. If you are concerned about your eye health, you should speak with an eye care professional about a clinical exam rather than relying on genetic testing alone.
Sources & further reading
Educational information only, last refreshed 9/30/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs1329428?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants
This TYK2 variant shows evidence of antagonistic pleiotropy, with opposite effects on the risk of psoriasis versus rheumatoid arthritis.
This variant in the TYK2 gene is identified as a shared causal signal in the genetic architecture of psoriasis and rheumatoid arthritis.
This SNP acts as an intermediate allele tag for the C9orf72 repeat expansion, which is linked to both ALS risk and longevity outcomes.
This variant in the CDKN2B-AS1 long noncoding RNA gene is associated with extreme longevity in genome-wide association studies.
This variant has been identified as a shared genetic signal between longevity and Alzheimer's disease risk.
A variant in the ALOX5 gene associated with potential modulation of inflammatory responses to dietary factors.