F11 rs281875275: Understanding Factor XI Deficiency Carrier Status
The rs281875275 variant is a specific genetic change located within the F11 gene. It is associated with hereditary factor XI deficiency, a condition that can impact the body's ability to form blood clots effectively.
What each genotype means
Typical factor XI activity
This genotype represents the most common genetic sequence for this position in the F11 gene. Individuals with this profile are not expected to have factor XI deficiency related to this specific variant.
This is the most common genotype observed across all global populations.
Carrier of factor XI variant
This genotype indicates you carry one copy of the variant associated with hereditary factor XI deficiency. While carriers may sometimes show mild reductions in factor XI levels, they are generally asymptomatic, though they should inform their healthcare provider of this status before any surgical or dental procedures.
This genotype is rare in the general population, though carrier status for F11 variants is more frequently observed in specific ancestral groups, such as individuals of Ashkenazi Jewish descent.
Increased risk of deficiency
This genotype indicates you carry two copies of the variant associated with hereditary factor XI deficiency. Individuals with this profile may have a significantly reduced level of factor XI protein, which can lead to a mild to moderate bleeding disorder; please discuss these results with a hematologist or your primary care physician to understand your specific clinical risk.
This genotype is very rare in the general population.
What is rs281875275?
The variant rs281875275 is a single nucleotide polymorphism (SNP) located on chromosome 4 within the F11 gene region. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is cataloged in major genetic databases and is recognized for its potential impact on the function of the F11 gene. Because it is a rare variant, it is not found in the majority of the population. Researchers track such variants to understand how they might alter the production or function of proteins essential for physiological processes, such as blood coagulation. By studying the location and nature of this change, scientists can better categorize its potential role in hereditary conditions.
The Role of the F11 Gene
The F11 gene provides the essential instructions for the body to produce a protein called coagulation factor XI. This protein plays a critical role in the coagulation cascade, which is the complex series of chemical reactions that allows blood to clot and stop bleeding after an injury. When the F11 gene functions normally, it ensures that sufficient levels of factor XI are present in the bloodstream. If the gene contains certain variants, it may lead to a reduction in the amount of functional factor XI protein or result in a protein that does not work as intended. This impairment can slow down the clotting process, potentially leading to a bleeding disorder known as factor XI deficiency. Understanding this gene is vital for identifying the underlying causes of various inherited coagulation issues.
Research and Evidence
Research into rs281875275 has linked it to hereditary factor XI deficiency. Evidence for this association is considered moderate, as clinical interpretations can sometimes vary based on the specific context of the patient's overall genetic profile. Factor XI deficiency is generally characterized by mild to moderate bleeding symptoms, such as nosebleeds, easy bruising, or prolonged bleeding after surgery or trauma. It is important to note that the severity of symptoms does not always correlate perfectly with the amount of factor XI in the blood, and other genetic or environmental factors often influence the clinical outcome. Because this is a rare variant, ongoing research is necessary to fully characterize its impact across diverse populations. Clinicians use this information to help guide diagnostic processes for patients presenting with unexplained bleeding symptoms.
Population Frequency
The rs281875275 variant is classified as rare in the general population. Because it is not a common polymorphism, most individuals do not carry this specific change. Frequency data for rare variants can be difficult to estimate precisely, as they are often found in very small subsets of the population or specific ancestral groups. Large-scale genomic databases like gnomAD are used to track the prevalence of such variants, but for rare markers, the data may be limited. The rarity of this variant means that the likelihood of inheriting it is low, and it is typically studied in the context of clinical cases where factor XI deficiency is suspected. If you have concerns about your genetic status regarding this variant, it is best to consult with a genetic counselor or a medical professional who can interpret your results in the context of your personal and family health history.
Managing Your Genetic Information
Genetic information regarding variants like rs281875275 should be treated as a tool for health awareness rather than a definitive diagnosis. If you have received information about this variant, it is important to understand that it does not necessarily mean you will experience significant health issues. Many people carry genetic variants without ever developing symptoms of a related condition. You cannot use this information to diagnose yourself or to make medical decisions, such as starting or stopping medications. If you are concerned about bleeding tendencies or have a family history of clotting disorders, discuss these findings with your healthcare provider. They can order appropriate clinical tests to measure your actual factor XI levels and provide guidance tailored to your specific health needs. Always rely on professional medical advice for any decisions regarding your health and well-being.
How common is this variant?
The rs281875275 variant is considered rare across all major population groups.
Frequently asked questions
What is factor XI deficiency?
Factor XI deficiency is a rare inherited bleeding disorder caused by low levels or impaired function of the factor XI protein. It can lead to symptoms like nosebleeds, easy bruising, and prolonged bleeding after surgery.
Does having this variant mean I have a bleeding disorder?
Not necessarily. Having a genetic variant does not always result in a clinical condition. You should consult a doctor to have your actual factor XI levels tested if you are concerned.
Can I change my genotype?
No, your genotype is determined at conception and cannot be changed. However, understanding your genetic profile can help you and your doctor manage your health more effectively.
Should I be worried about this result?
Genetic results should be discussed with a healthcare professional. They can help you understand the significance of the finding based on your personal health history and symptoms.
Sources & further reading
Educational information only, last refreshed 9/29/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is associated with Factor XI deficiency, an autosomal recessive bleeding disorder.
This variant, also known as p.Arg497Ter, is a significant mutation associated with Factor XI deficiency.
This variant is associated with carrier status for Factor XI deficiency, which can impact blood coagulation.
This variant is linked to hereditary factor XI deficiency, with homozygous status indicating the disease state.
This variant is associated with carrier status for hereditary Factor XI deficiency.