CETP rs1137617: Understanding Your Genetic HDL Association
The rs1137617 variant is a common genetic marker located within the CETP gene. It is frequently studied for its statistical association with levels of high-density lipoprotein (HDL) cholesterol in the blood.
What each genotype means
Typical CETP activity
This genotype is associated with standard levels of cholesteryl ester transfer protein (CETP) activity. Research indicates that individuals with this genotype typically exhibit baseline HDL cholesterol levels compared to those carrying the G allele. This is considered the common reference state in many populations.
This genotype is common in many global populations, though exact frequencies vary by ancestry.
Moderate HDL cholesterol elevation
Carriers of this genotype often show moderately higher levels of HDL cholesterol compared to those with the AA genotype. This variant is associated with the I405V polymorphism, where the G allele corresponds to the Valine (V) substitution, which may influence CETP protein function. You should discuss your overall lipid profile and cardiovascular health with your clinician.
This heterozygous genotype is frequently observed across diverse populations, often representing a significant portion of the population.
Increased HDL cholesterol levels
This genotype is associated with higher circulating levels of HDL cholesterol and has been linked in some studies to potential cardiovascular resilience and longevity. The G allele (Valine) is associated with reduced CETP activity, which helps maintain higher HDL levels. Please consult with your healthcare provider to interpret these findings in the context of your complete lipid panel and medical history.
This genotype is found in a significant minority of individuals across various ancestries, with frequencies often consistent with Hardy-Weinberg equilibrium.
What is the rs1137617 Variant?
The rs1137617 variant is a single nucleotide polymorphism (SNP) located within the CETP gene on chromosome 16. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is situated in a region of the genome that influences how the body processes lipids. Because it is a common variant, it is found frequently across diverse human populations. Researchers track such variants to understand how subtle differences in our genetic code contribute to the natural variation in physiological traits, such as blood lipid profiles. It is important to note that while this variant is a subject of scientific interest, it is just one of many genetic and environmental factors that influence cholesterol levels.
The Role of the CETP Gene
The CETP gene provides instructions for creating the cholesteryl ester transfer protein. This protein plays a critical role in lipid metabolism by facilitating the transfer of cholesteryl esters from high-density lipoprotein (HDL) particles to other lipoproteins, such as low-density lipoprotein (LDL) and very-low-density lipoprotein (VLDL). By moving these fats between particles, the protein helps regulate the composition of circulating lipids in the bloodstream. When the function of this protein is altered—either through genetic variation or pharmacological intervention—it can lead to measurable changes in the concentration of HDL cholesterol. Understanding this mechanism is a major focus of cardiovascular research, as scientists work to clarify the complex relationship between lipid transport, cholesterol levels, and overall metabolic health.
Research Associations and Evidence
The CETP gene is well-documented in the GWAS Catalog and other genomic databases for its association with lipid traits. Research has consistently shown that certain variants in this region are linked to variations in HDL cholesterol levels. While some studies suggest that specific CETP variants may be associated with longevity or cardiovascular outcomes, the evidence is nuanced. Large-scale genomic studies often find that while these associations are statistically significant, they do not exist in a vacuum; they interact with diet, lifestyle, and other genetic factors. It is essential to interpret these findings as population-level statistical trends rather than individual predictors of health. Current research continues to investigate whether these genetic associations reflect a direct causal pathway or if they are markers for other underlying biological processes.
Population Frequency and Interpretation
The rs1137617 variant is common across many global populations, meaning that a large portion of the human population carries at least one copy of the variant allele. Because it is so widespread, it is considered a normal part of human genetic diversity rather than a rare mutation. When interpreting information about this variant, it is important to remember that genetic data is probabilistic, not deterministic. Having a particular genotype does not guarantee a specific health outcome, as cholesterol levels are heavily influenced by environmental factors like nutrition, physical activity, and medical history. This information is intended for educational purposes to help you understand the role of genetics in human biology. It should not be used to make medical decisions or to diagnose any condition.
What You Can Do With This Information
Learning about your genetic variants can be an engaging way to understand your biological makeup, but it is not a substitute for professional medical advice. If you are interested in your cholesterol levels or cardiovascular health, the most effective step is to consult with a healthcare provider. They can order standard clinical blood panels to measure your actual lipid levels, which provide a much more accurate picture of your health than genetic markers alone. If you have questions about how your genetics might influence your response to medications or specific health risks, discuss these with your doctor or a genetic counselor. They can help you interpret your results in the context of your overall health history and provide guidance on evidence-based lifestyle or medical interventions.
How common is this variant?
The rs1137617 variant is common across diverse global populations, with the A and G alleles appearing at significant frequencies in most ancestral groups.
Frequently asked questions
Does this variant mean I have high cholesterol?
No, having a specific genotype for rs1137617 does not mean you have high cholesterol. Cholesterol levels are determined by a combination of many genes, your diet, your activity level, and other environmental factors.
Can I use this information to change my diet?
Genetic information should not be used to make specific dietary changes without consulting a healthcare professional. A doctor or registered dietitian can provide personalized advice based on your actual blood lipid levels and health goals.
Is this variant a disease-causing mutation?
No, rs1137617 is a common genetic variant, not a disease-causing mutation. It is a normal part of human genetic variation that is associated with natural differences in lipid levels.
Should I get a genetic test for this?
There is generally no clinical need to test for this specific SNP. Standard blood tests for cholesterol are the gold standard for assessing your cardiovascular health and are much more informative for medical decision-making.
Sources & further reading
Educational information only, last refreshed 9/30/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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CETP promoter variant associated with preserved cognitive function, elevated HDL levels, and exceptional longevity across European cohorts.
The B2 (A) allele of the TaqIB polymorphism is associated with lower CETP activity and significantly higher HDL-cholesterol levels.
The missense variant p.Ile422Val (I405V) in CETP is associated with reduced cholesteryl ester transfer protein activity, leading to elevated HDL-C levels and modest protection against coronary artery disease.
The I405V variant in CETP is associated with altered HDL cholesterol levels and cardiovascular risk profiles.
Well-established regulatory intronic polymorphism modulating cholesteryl ester transfer protein activity and circulating HDL cholesterol levels.
Known as the CETP TaqIB polymorphism, this intron variant is linked to reduced CETP activity, higher circulating HDL-C, and altered cardiovascular risk profile.