FASLG rs763110: Understanding the -844T>C Variant
The rs763110 variant is a common single nucleotide polymorphism located in the promoter region of the FASLG gene. It is frequently studied for its potential role in modulating immune system function and its statistical associations with cancer risk and autoimmune conditions.
What each genotype means
Baseline risk profile
This genotype represents the baseline state for the FASLG promoter variant. Research into this specific variant has primarily focused on the potential protective associations of the T allele, meaning individuals with the C/C genotype do not carry the variant associated with those specific findings in published meta-analyses.
This genotype is common, appearing in a significant portion of the global population consistent with the reported minor allele frequency of approximately 0.40 to 0.50.
Potential reduced risk association
Carriers of this genotype have one copy of the T allele, which has been investigated for its role in modulating FASLG transcription. Some meta-analyses of published studies have suggested an association between the presence of the T allele and a potentially reduced risk for certain cancers, though the evidence remains limited and should not be interpreted as a clinical diagnosis or medical recommendation.
This heterozygous genotype is frequently observed across major continental populations, reflecting the high prevalence of both the C and T alleles.
Potential reduced risk association
Individuals with this genotype carry two copies of the T allele. Similar to the heterozygous state, some research suggests this genotype may be associated with a reduced risk for certain cancers compared to the C/C genotype, though these findings are based on statistical associations in population studies and do not constitute a medical prediction for any individual.
This homozygous genotype is common, occurring in a substantial percentage of individuals across diverse ancestral backgrounds.
What is rs763110?
The rs763110 variant, often referred to in scientific literature as the -844T>C polymorphism, is a specific change in the DNA sequence of the FASLG gene. Located on chromosome 1, this variant sits within the promoter region, which is the area of a gene that acts as an on-off switch, controlling how much of a protein is produced. Because it is located in a regulatory region, researchers hypothesize that this variant may influence the binding of transcription factors, potentially altering the expression levels of the Fas ligand protein. It is a very common variant, with the minor allele frequency reaching approximately 0.40 to 0.50 in many global populations, meaning that a large portion of the human population carries at least one copy of the variant allele.
The Role of the FASLG Gene
The FASLG gene provides instructions for making the Fas ligand protein, a member of the tumor necrosis factor (TNF) superfamily. This protein plays a critical role in the body's immune system by binding to the Fas receptor on the surface of target cells. This interaction triggers a process called apoptosis, or programmed cell death. By inducing apoptosis, the Fas ligand helps the body eliminate damaged, infected, or unnecessary cells, including activated T-cells that are no longer needed after an immune response. This mechanism is essential for maintaining immune homeostasis and preventing the accumulation of abnormal cells. When this system is disrupted, it can lead to immune dysregulation or, in some cases, the survival of cells that should have been cleared by the body.
Research and Associations
Scientific research into rs763110 has primarily focused on its potential impact on disease susceptibility. Some studies have explored its association with cancer risk, with meta-analyses suggesting that carriers of the T allele might show a reduced risk for certain types of cancer compared to those with the C allele. Additionally, the FASLG gene has been implicated in autoimmune conditions, where the immune system mistakenly attacks the body's own tissues. While some studies have identified statistical links between this variant and various autoimmune phenotypes, the evidence remains limited and sometimes conflicting across different populations. It is important to note that these findings are based on statistical associations observed in large groups and do not imply a direct cause-and-effect relationship for any individual. The complexity of immune regulation means that many genetic and environmental factors contribute to these health outcomes.
Interpreting Your Information
If you have received information about your rs763110 genotype, it is important to understand that this is a common genetic variation found in a large percentage of the healthy population. Having a specific genotype does not constitute a medical diagnosis, nor does it predict the development of any specific disease. Genetic variants like rs763110 are just one small piece of a much larger puzzle that includes your overall genetic background, lifestyle, and environment. You cannot use this information to make medical decisions or to predict your personal health future. If you have concerns about your health, family history, or potential risks for autoimmune or oncological conditions, the most appropriate step is to consult with a qualified healthcare professional or a genetic counselor who can provide context based on your complete clinical picture.
How common is this variant?
The rs763110 variant is highly common, with a minor allele frequency of approximately 0.40 to 0.50 across major continental populations.
Frequently asked questions
Is rs763110 a cause of autoimmune disease?
No, rs763110 is not a direct cause of autoimmune disease. It is a common genetic variant that has been statistically associated with immune regulation, but most people who carry this variant do not develop autoimmune conditions.
Should I be worried if I have the T/T genotype?
There is no reason for concern based on this genotype alone. It is a very common variation found in many healthy individuals and is not a diagnostic marker for any disease.
Does this variant affect my cancer risk?
Some research suggests a statistical association between this variant and a potentially reduced risk for certain cancers. However, these findings are based on population-level data and do not predict individual health outcomes.
Can I use this information to change my diet or lifestyle?
No, this genetic information is not actionable for lifestyle or dietary changes. You should focus on established health guidelines and consult your doctor for personalized medical advice.
Sources & further reading
Educational information only, last refreshed 9/27/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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