CD36 rs3211938: Understanding This Genetic Variant
The rs3211938 variant is a specific genetic change located within the CD36 gene. Recent research has associated this variant with an increased risk of dilated cardiomyopathy, particularly in individuals of African genetic ancestry.
What each genotype means
Typical CD36 expression
This genotype represents the common, wild-type state for this variant. Research indicates that individuals with this genotype typically maintain normal CD36 protein expression levels.
This is the most common genotype observed in the majority of global populations.
Heterozygous for CD36 variant
Carrying one copy of the T allele means you are heterozygous for this variant. While this variant has been studied in the context of malaria susceptibility and CD36 deficiency, carriers of a single copy generally do not exhibit the full clinical deficiency associated with the homozygous state.
This genotype is found at varying frequencies depending on ancestry, with higher prevalence observed in certain African populations.
Potential CD36 deficiency
This genotype has been documented in research to result in CD36 deficiency in some individuals. CD36 is a protein involved in fatty acid uptake and other cellular processes, and its absence can have clinical implications; please consult with a healthcare professional to discuss any relevant health concerns.
This genotype is relatively rare and is most frequently documented in specific populations where this variant has been historically studied for its role in malaria susceptibility.
What is rs3211938?
The variant rs3211938 is a single nucleotide polymorphism (SNP) found within the CD36 gene. In genetics, a SNP represents a variation at a single position in a DNA sequence among individuals. This specific variant is characterized as a nonsense mutation, meaning it introduces a premature stop signal in the genetic code. This alteration can lead to the production of a truncated or non-functional protein. Because CD36 plays a critical role in cellular metabolism and fatty acid uptake, changes to its structure or function can have physiological consequences. Researchers track these variants to understand how they contribute to human health and disease susceptibility across different populations.
The Role of the CD36 Gene
The CD36 gene provides instructions for making a protein that functions as a scavenger receptor. This protein is found on the surface of many cell types, including those in the heart, where it facilitates the uptake of long-chain fatty acids. These fatty acids are a primary energy source for cardiac muscle cells. When the CD36 protein is absent or dysfunctional, the heart may struggle to maintain optimal energy levels, which can impact its ability to contract and pump blood effectively. By studying variants like rs3211938, scientists are gaining insights into how disruptions in cardiac metabolism contribute to the development of heart conditions, specifically those involving the weakening of the heart muscle.
Research and Clinical Associations
Recent genome-wide association studies have identified a significant link between the rs3211938 variant and an increased risk of dilated cardiomyopathy (DCM). This association is particularly notable in individuals of African genetic ancestry, where the variant is more prevalent. Evidence suggests that the variant may have been under positive selection in the past, potentially due to a protective role against malaria. However, in the context of modern cardiovascular health, the loss of CD36 function is associated with suboptimal myocardial energetics. It is important to note that while this association is statistically significant, genetic risk is only one factor in heart health. Environmental influences, lifestyle, and other genetic markers also play substantial roles in the development of cardiovascular diseases.
Population Frequency and Interpretation
The frequency of the rs3211938 variant varies significantly across different global populations. Research indicates that it is present in approximately 17% of individuals of African genetic ancestry, while it is found in less than 0.1% of individuals of European genetic ancestry. This disparity highlights the importance of diverse genomic research, as findings in one population may not be directly applicable to others. For individuals who discover they carry this variant, it is essential to understand that it does not serve as a medical diagnosis. Genetic information should be viewed as a tool for understanding potential predispositions rather than a definitive prediction of health outcomes. Always consult with a healthcare professional to discuss how your genetic profile relates to your overall health and any necessary screenings.
How common is this variant?
The variant is found in approximately 17% of individuals of African genetic ancestry, but is rare (less than 0.1%) in individuals of European genetic ancestry.
Frequently asked questions
Does having the rs3211938 variant mean I have heart disease?
No, having this variant does not mean you have heart disease. It is a genetic marker associated with an increased risk, but many other factors, including lifestyle and other genes, determine your actual health.
Should I be worried if I have the GG genotype?
Genetic results should not cause alarm. If you are concerned about your cardiovascular health, the best step is to discuss your results with a cardiologist or primary care physician who can provide context based on your medical history.
Is this variant found in all populations?
No, the frequency of this variant is highly dependent on ancestry. It is much more common in populations of African descent compared to those of European descent.
Can I change my genotype?
No, your genotype is determined at conception and cannot be changed. However, understanding your genetic predispositions can help you and your doctor make informed decisions about your health and preventative care.
Sources & further reading
Educational information only, last refreshed 10/3/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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