CETP rs5882: Understanding the I405V Variant and Cholesterol
The rs5882 variant, also known as I405V, is a genetic change in the CETP gene that influences how the body processes cholesterol. It has been studied for its potential links to HDL cholesterol levels, cognitive aging, and longevity, though research findings remain mixed.
What each genotype means
Standard CETP activity
This genotype is associated with standard levels of CETP mass and activity. Some research suggests this genotype may correlate with lower HDL cholesterol levels compared to those carrying the G allele, though findings across different populations are mixed.
This is a common genotype, though its frequency varies significantly by ancestry.
Intermediate CETP profile
Individuals with this genotype carry one copy of each allele, often showing intermediate levels of CETP activity. Research into the cognitive and cardiovascular implications of this genotype has yielded inconsistent results, with some studies suggesting potential protective effects against cognitive decline compared to the A/A genotype.
This heterozygous genotype is frequently observed in many global populations.
Reduced CETP activity
This genotype, often referred to as the 405VV variant, is associated with reduced CETP mass and activity, which can lead to larger HDL particle size. Some studies have linked this genotype to potential longevity benefits and a lower risk of dementia or Alzheimer's disease, though these findings are not consistent across all research cohorts and remain a subject of ongoing study.
This genotype is found in a significant portion of the population, with notable prevalence in Ashkenazi Jewish centenarian cohorts.
What is the rs5882 Variant?
The rs5882 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. This specific variant is often referred to as I405V because it results in an amino acid substitution where isoleucine (I) is replaced by valine (V) at position 405 of the protein. Because this change occurs in the coding region of the gene, it can potentially alter the structure or function of the resulting protein. Scientists track this variant to understand how subtle differences in our genetic code contribute to variations in human health, particularly regarding lipid metabolism and the aging process.
The Role of the CETP Gene
The CETP gene provides instructions for making 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). HDL is often referred to as 'good' cholesterol because it helps remove excess cholesterol from the bloodstream and transport it to the liver for excretion. By regulating the exchange of these fats, CETP influences the overall concentration and composition of cholesterol in the blood. Variations in the CETP gene, like rs5882, are of interest to researchers because they may affect the efficiency of this transfer process, thereby impacting the levels of HDL cholesterol circulating in an individual's body.
Research Associations and Evidence
Research into rs5882 has produced varied and sometimes conflicting results. Some studies have suggested that certain alleles of this variant are associated with higher levels of HDL cholesterol and potential benefits for longevity or slower cognitive decline. For instance, some investigations have explored whether this variant contributes to a 'longevity syndrome' or reduced risk of dementia. However, other studies have found no significant association between the variant and conditions like coronary artery disease or exceptional lifespan. Because the evidence is limited and often varies by population, it is important to view these findings as statistical associations rather than definitive predictors of health. The scientific community continues to investigate these links, noting that environmental factors and other genetic markers likely play significant roles in these complex health outcomes.
Population Frequency
The rs5882 variant is relatively common in human populations. Data indicates that the minor allele frequency for this SNP is approximately 0.30 to 0.40 across both European and Asian populations. This means that a significant portion of the population carries at least one copy of the variant allele. Because it is a common polymorphism, it has been widely studied across diverse ethnic groups, which has contributed to the mixed results observed in the literature. The prevalence of the different genotypes varies, but the variant is not considered rare, making it a frequent subject of study in large-scale genetic association research.
Interpreting Your Genetic Information
It is important to understand that genetic variants like rs5882 are only one piece of a much larger health puzzle. While research explores the potential impact of this variant on cholesterol and aging, it cannot be used to diagnose any medical condition or predict an individual's future health with certainty. Many factors, including diet, exercise, lifestyle choices, and other genetic influences, contribute to cholesterol levels and cognitive health. If you have questions about your cholesterol levels or concerns about your long-term health, the most effective approach is to consult with a qualified healthcare professional. They can provide personalized guidance based on your clinical history and standard medical testing, rather than relying on genetic data alone.
How common is this variant?
The minor allele frequency for rs5882 is approximately 0.30-0.40 across European and Asian populations, making it a common genetic variant.
Frequently asked questions
Does the rs5882 variant cause high cholesterol?
The rs5882 variant is associated with variations in HDL cholesterol levels, but it does not 'cause' high cholesterol in the way a disease-causing mutation might. Cholesterol levels are influenced by a complex mix of genetics, diet, and lifestyle factors.
Can I use this SNP to predict if I will live to 100?
No. While some studies have explored links between this variant and longevity, genetics is not a crystal ball. Longevity is influenced by many factors, and this SNP is not a reliable predictor of lifespan.
Should I change my diet based on my rs5882 genotype?
You should not make dietary changes based solely on a genetic variant. Always consult with a doctor or a registered dietitian to create a nutrition plan that is appropriate for your specific health needs and medical history.
Is rs5882 the same as the TaqIB polymorphism?
No, rs5882 (I405V) and TaqIB are different genetic markers within the CETP gene. While both are studied in relation to cholesterol and longevity, they represent different locations and types of genetic variation.
Sources & further reading
Educational information only, last refreshed 9/21/2026. 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.