SORT1 rs4878331: Understanding Your Genetic Association
The rs4878331 variant is a common genetic change located within the SORT1 gene region. It has been identified in scientific studies as being associated with variations in LDL cholesterol levels and the risk of developing coronary artery disease.
What each genotype means
Baseline cholesterol risk profile
This genotype represents the common baseline state for this variant in many populations. Research indicates that the SORT1 locus is associated with variations in LDL cholesterol levels and coronary artery disease risk, but this specific genotype does not carry the risk-associated allele identified in some studies. Please discuss your overall cardiovascular health and lipid management with your clinician.
This is a common genotype found in the majority of individuals across most global populations.
Intermediate cholesterol risk profile
Carrying one copy of the variant allele may be associated with subtle differences in how your body regulates LDL cholesterol levels. Because the SORT1 gene plays a role in lipoprotein metabolism, this genotype is often studied in the context of coronary artery disease risk. Please discuss your lipid profile and cardiovascular risk factors with your healthcare provider.
This heterozygous genotype is frequently observed in diverse populations worldwide.
Elevated cholesterol risk profile
This genotype is associated with variations in LDL cholesterol levels and has been linked to an increased risk of coronary artery disease in some genetic association studies. The SORT1 gene is involved in the hepatic secretion of lipoproteins, and this variant may influence that process. You should discuss your cholesterol levels and cardiovascular health with your clinician to determine if any monitoring or lifestyle adjustments are appropriate.
This genotype is common and found at varying frequencies across different ancestral groups.
What is the rs4878331 Variant?
The rs4878331 variant is a single nucleotide polymorphism (SNP) located on chromosome 1p13.3. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant sits within a region of the genome that includes the SORT1 gene, which is a well-studied locus in cardiovascular research. Because this variant is located in a non-coding region, it is thought to influence how the body regulates the expression of nearby genes rather than changing the structure of a protein directly. Researchers use large-scale genome-wide association studies (GWAS) to track how often this specific DNA change appears in populations and whether those individuals show consistent differences in health-related traits, such as lipid profiles or cardiovascular outcomes.
The Role of the SORT1 Gene
The SORT1 gene provides instructions for creating a protein called sortilin. Sortilin acts as a sorting receptor within cells, playing a critical role in the trafficking of proteins, including apolipoprotein B (apoB). ApoB is a primary component of low-density lipoprotein (LDL) particles, often referred to as 'bad' cholesterol. By regulating how these lipoproteins are processed, secreted, or degraded in the liver, sortilin helps maintain cholesterol homeostasis in the blood. Research indicates that when sortilin levels are altered, it can affect the amount of LDL cholesterol circulating in the bloodstream. Furthermore, sortilin is expressed in other tissues, such as macrophages, where it may influence the formation of foam cells—a key step in the development of atherosclerosis, the hardening of the arteries.
Research and Evidence Strength
The association between the SORT1 locus and cardiovascular health is supported by extensive genome-wide association studies. These studies have consistently linked genetic variations in this region to plasma LDL cholesterol levels and the risk of coronary artery disease. While the statistical evidence for an association is strong across many populations, the functional impact of the specific rs4878331 variant is considered to have limited evidence in terms of direct clinical utility. It is important to note that genetic associations are not the same as medical diagnoses. Many factors, including diet, lifestyle, and other genetic markers, contribute to cholesterol levels and heart health. Current research continues to investigate the complex mechanisms by which this locus influences cardiovascular risk, but it is not currently used as a standalone diagnostic tool for predicting individual heart disease outcomes.
Population Frequency and Interpretation
The rs4878331 variant is considered a common genetic variant, meaning it is found frequently across diverse human populations. Because it is common, it is a standard part of human genetic diversity rather than a rare mutation. When interpreting information about this variant, it is essential to understand that having a specific genotype does not guarantee a particular health outcome. Genetic data provides a snapshot of biological predispositions, but these are heavily influenced by environmental and behavioral factors. If you are concerned about your cholesterol levels or cardiovascular risk, the most effective approach is to consult with a healthcare professional. They can evaluate your full clinical picture, including blood tests and family history, to provide personalized guidance that goes far beyond what a single genetic variant can reveal.
How common is this variant?
The rs4878331 variant is a common polymorphism found across various global populations, with its specific allele frequencies varying by ancestry.
Frequently asked questions
Does having this variant mean I will have high cholesterol?
No, having this variant does not guarantee that you will have high cholesterol. Cholesterol levels are influenced by a complex combination of genetics, diet, physical activity, and other lifestyle factors.
Can I use this information to diagnose heart disease?
No, this genetic information cannot be used to diagnose heart disease. Genetic associations are statistical findings in large groups and are not intended for individual medical diagnosis.
Should I change my medication based on this SNP?
You should never change your medication based on genetic test results without consulting your doctor. Always discuss any concerns about your treatment plan with your clinician or pharmacist.
Where can I find more information about my heart health?
For reliable information regarding your heart health, you should speak with a primary care physician or a cardiologist. They can order appropriate clinical tests, such as a lipid panel, to assess your actual health status.
Sources & further reading
Educational information only, last refreshed 9/23/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Located in the 1p13 locus near SORT1/CELSR2, this variant strongly influences plasma low-density lipoprotein cholesterol (LDL-C) levels and coronary artery disease risk.
Functional regulatory variant at the 1p13 locus that alters hepatic SORT1 expression, modulating plasma low-density lipoprotein cholesterol (LDL-C) levels and coronary artery disease risk.
Functional regulatory variant altering SORT1 hepatic expression, strongly predisposing to altered LDL cholesterol levels and myocardial infarction risk.
This SNP is linked to variations in LDL cholesterol levels and risk of coronary artery disease.
This variant influences LDL cholesterol levels and is a significant marker for cardiovascular health.