TREM2 rs7598503: Understanding This Alzheimer's Risk Variant
The rs7598503 variant is a rare genetic change located within the TREM2 gene. Research indicates that this variant is associated with an increased risk of developing late-onset Alzheimer's disease.
What each genotype means
Typical Alzheimer's risk
This is the most common genotype for this position in the TREM2 gene. It does not carry the specific R47H mutation associated with increased risk for late-onset Alzheimer's disease.
Carried by the vast majority of individuals in all global populations.
Increased Alzheimer's risk
This genotype includes the R47H variant, which is a known genetic risk factor for late-onset Alzheimer's disease. Research indicates that carriers of this variant may have a significantly higher statistical risk of developing the condition compared to non-carriers, though it does not guarantee the development of the disease.
This genotype is rare, found in less than 1% of most populations, primarily identified in individuals of European descent.
Elevated Alzheimer's risk
This genotype represents the homozygous state for the R47H variant. While rare, this profile is associated with a significantly increased risk for late-onset Alzheimer's disease, and individuals with this genotype should discuss their overall health and family history with a healthcare professional.
This genotype is extremely rare and is observed in a very small fraction of the population.
What is the rs7598503 Variant?
The rs7598503 variant is a specific change in the DNA sequence of the TREM2 gene. In genetics, a single nucleotide polymorphism (SNP) like this represents a variation at a single position in the genome. While most of our DNA is identical, these small variations can influence how our bodies function. The rs7598503 variant is considered rare, meaning it is not found in the majority of the human population. Scientists study these rare variants to understand how they might contribute to complex health conditions, such as neurodegenerative diseases. Because this variant is located within a gene that plays a critical role in the brain's immune system, researchers have focused on how it might alter the normal function of the TREM2 protein.
The Role of the TREM2 Gene
The TREM2 gene provides instructions for making a protein called Triggering Receptor Expressed on Myeloid cells 2. This protein is found primarily on the surface of microglia, which are specialized immune cells in the brain. Microglia act as the brain's cleanup crew, identifying and removing cellular debris, misfolded proteins, and other harmful substances. By supporting these immune functions, the TREM2 protein helps maintain a healthy brain environment. When the TREM2 gene is altered by certain variants, the resulting protein may not function correctly. This can impair the ability of microglia to clear away toxic buildup, potentially contributing to the inflammation and neuronal damage observed in conditions like Alzheimer's disease. Understanding this pathway is a major focus of current neurological research.
Research and Disease Association
Scientific studies have identified a statistical association between rare variants in the TREM2 gene and an increased risk of late-onset Alzheimer's disease. While the most famous variant in this gene is R47H (rs75932628), other rare variants, including those in the same region, are also investigated for their impact on disease susceptibility. The evidence suggests that these variants may act by reducing the efficiency of the TREM2 protein's protective functions. It is important to note that having a risk variant does not mean an individual will develop Alzheimer's disease; rather, it indicates a higher statistical probability compared to those without the variant. The strength of this association can vary between different studies and populations, reflecting the complex, multi-factorial nature of Alzheimer's disease, which involves both genetic and environmental influences.
Population Frequency
The rs7598503 variant is rare, occurring in less than 1% of most human populations. Because it is so uncommon, it is often excluded from large-scale genome-wide association studies that focus on more frequent genetic markers. Its rarity makes it challenging to study, as researchers need to analyze very large groups of people to find enough individuals who carry the variant to draw statistically significant conclusions. Because of this, our understanding of how this variant affects risk across different ancestral backgrounds is still evolving. As genetic sequencing technology becomes more accessible, researchers hope to gain a clearer picture of how this and other rare TREM2 variants are distributed globally and how they influence health outcomes in diverse populations.
What This Information Means for You
Learning about a genetic variant like rs7598503 can be informative, but it is essential to interpret this information within the context of your overall health. Genetic risk factors are only one piece of the puzzle in complex conditions like Alzheimer's disease, which are influenced by a combination of genetics, lifestyle, and environment. This information is not a medical diagnosis and cannot predict whether you will develop a disease. If you have concerns about your genetic risk or family history, the best course of action is to consult with a healthcare professional or a genetic counselor. They can help you understand what these findings mean for you personally and discuss appropriate health screenings or lifestyle considerations. Always rely on clinical guidance rather than self-interpretation of genetic data.
How common is this variant?
The rs7598503 variant is rare, with a minor allele frequency of less than 1% in most global populations.
Frequently asked questions
Does having the rs7598503 variant mean I will get Alzheimer's?
No. Having this variant is associated with a higher statistical risk, but it does not guarantee that you will develop Alzheimer's disease. Many people without the variant develop the disease, and many with the variant do not.
Should I get tested for TREM2 variants?
Routine genetic testing for Alzheimer's risk variants is not currently recommended for the general public. If you have a strong family history of early-onset dementia, you may wish to speak with a genetic counselor to discuss the pros and cons of testing.
Is there a cure for Alzheimer's if I have this variant?
There is currently no cure for Alzheimer's disease. Research into TREM2 is ongoing, and scientists are investigating how these pathways might be targeted for future therapies, but this is still an area of active study.
How does TREM2 affect the brain?
TREM2 is a protein on the surface of microglia, the brain's immune cells. It helps these cells recognize and clear away harmful debris and proteins that can accumulate in the brain as we age.
Sources & further reading
Educational information only, last refreshed 10/9/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Rare variant that triples the risk for developing Alzheimer’s disease.
A recently annotated (2024) rare variant in TREM2 that increases the risk for Alzheimer's disease in specific sub-populations.
The p.R62H variant in the TREM2 gene is significantly associated with an increased risk of developing Alzheimer's disease.