EDN1 rs5370: Understanding the Lys198Asn Genetic Variant
The rs5370 variant is a common genetic polymorphism located within the EDN1 gene, which encodes endothelin-1. Research has investigated its potential associations with blood pressure regulation, cardiovascular health, and metabolic conditions.
What each genotype means
Common variant profile
This is the most common genotype for this variant, also known as the Lys198 allele. Research into this variant often focuses on its potential role in blood pressure regulation and cardiovascular health, though findings vary significantly by population and lifestyle factors like physical activity.
This is the most frequent genotype observed in most global populations.
Heterozygous variant profile
Carrying one copy of the T allele, also known as the Asn198 variant, may influence endothelin-1 levels and cardiovascular risk markers. Some studies suggest this genotype interacts with physical fitness levels to influence blood pressure, so you should discuss your cardiovascular health and lifestyle factors with your clinician.
This genotype is found at moderate frequencies across many populations.
Associated variant profile
This genotype, which carries two copies of the T allele, has been associated in some studies with increased risk for cardiovascular conditions and complications in individuals with diabetes. Because research findings are mixed and often specific to certain populations, please discuss your cardiovascular risk profile and any relevant health concerns with your healthcare provider.
This is the least common of the three genotypes in most studied populations.
What is rs5370 and Where is it Located?
The genetic variant rs5370 is a single nucleotide polymorphism (SNP) situated on chromosome 6 within the EDN1 gene. In scientific literature, this variant is frequently referred to as the Lys198Asn or K198N polymorphism. This nomenclature refers to the change in the amino acid sequence of the resulting protein: the common G allele encodes the amino acid lysine (Lys), while the T allele encodes asparagine (Asn). Because it is located within the coding region of the gene, this variation has the potential to alter the structure or function of the endothelin-1 protein. Geneticists study such variants to understand how small changes in DNA sequence can contribute to the diversity of physiological traits observed across human populations.
The Role of the EDN1 Gene
The EDN1 gene provides instructions for producing endothelin-1, a potent peptide that plays a critical role in the cardiovascular system. Endothelin-1 is primarily known for its ability to constrict blood vessels, which helps regulate blood pressure and maintain vascular tone. Beyond its role in blood pressure, endothelin-1 is involved in various biological processes, including cell proliferation and the regulation of fluid balance in the kidneys. Because of its central role in vascular biology, researchers have long hypothesized that variations in the EDN1 gene might influence an individual's susceptibility to hypertension or other cardiovascular conditions. Understanding how this gene functions provides the necessary context for interpreting why specific variants like rs5370 are subjects of ongoing clinical and epidemiological investigation.
Research Associations and Evidence Strength
The evidence linking rs5370 to health outcomes is considered moderate and often context-dependent. Various studies have explored its association with blood pressure, hypertension, and metabolic markers like HDL cholesterol. For instance, some research has suggested that the T allele may be associated with differences in systolic blood pressure or pulse pressure, particularly when analyzed in combination with other genetic markers. Other studies have investigated its potential role in conditions such as type 2 diabetes-related nephropathy. However, it is important to note that genetic associations can vary significantly based on ancestry, study design, and environmental factors. Many of these findings are statistical associations observed in specific cohorts rather than direct evidence of causation. As with many complex traits, cardiovascular health is influenced by a combination of numerous genetic variants, lifestyle choices, and environmental exposures.
Population Frequency
The rs5370 variant is considered a common polymorphism in human populations. The G allele is generally more frequent, while the T allele occurs at a lower, yet significant, frequency across diverse ancestral groups.
Interpreting Your Genetic Information
If you have access to your genetic data regarding rs5370, it is essential to view this information as a single piece of a much larger biological puzzle. Genetic variants do not function in isolation; they interact with your environment, diet, and overall health history. Because the associations between rs5370 and health traits are complex and not definitive, this information cannot be used to diagnose any medical condition or predict individual health outcomes. You should never use genetic data to make decisions about your medical care, such as starting or stopping medications. If you have concerns about your blood pressure or cardiovascular risk, the most effective approach is to consult with a qualified healthcare provider or a pharmacist. They can evaluate your clinical history, perform necessary screenings, and provide personalized guidance based on established medical standards.
How common is this variant?
The rs5370 variant is a common polymorphism found across global populations, with the G allele being the most prevalent version of the gene.
Frequently asked questions
Is rs5370 a cause of high blood pressure?
No, rs5370 is not considered a direct cause of high blood pressure. It is a genetic variant that has been statistically associated with blood pressure traits in some studies, but cardiovascular health is influenced by many genetic and environmental factors.
Can I use my rs5370 result to predict my heart disease risk?
No, you cannot use this single variant to predict your risk of heart disease. Genetic risk is complex, and clinical risk assessment requires a comprehensive evaluation by a doctor, including blood pressure monitoring and blood work.
Should I change my diet based on my rs5370 genotype?
There is no evidence-based dietary recommendation specifically for the rs5370 genotype. You should discuss any dietary or lifestyle changes with your healthcare provider to ensure they are appropriate for your overall health needs.
What does 'Lys198Asn' mean?
Lys198Asn is another name for the rs5370 variant. It describes the specific change in the protein: the amino acid lysine (Lys) at position 198 is replaced by asparagine (Asn) due to the genetic variation.
Sources & further reading
Educational information only, last refreshed 10/5/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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