HLA-DRB1 rs6457327: What Your Genotype Means
The rs6457327 variant is a common genetic change located within the HLA-DRB1 gene region on chromosome 6. It is statistically associated with immune response regulation and has been linked in research to an increased risk for certain autoimmune conditions and follicular lymphoma.
What each genotype means
Typical immune response profile
This genotype represents the homozygous state for the major allele at this position. Research indicates this variant is located within the highly complex HLA-DRB1 region, which is known to influence immune system regulation and susceptibility to various autoimmune conditions. Because HLA associations are often dependent on specific population-based haplotypes, this result should be viewed as a small piece of general context rather than a diagnostic indicator.
This genotype is common in many global populations, though exact frequencies vary significantly by ancestral background.
Typical immune response profile
This heterozygous genotype is found in individuals carrying one copy of each allele at this locus. While this variant is associated with immune regulation, the HLA-DRB1 region is characterized by extreme genetic diversity, and the functional impact of this specific SNP is often secondary to the broader haplotype structure. Most individuals with this genotype do not develop autoimmune conditions, as disease risk is multifactorial and influenced by many other genetic and environmental factors.
This genotype is frequently observed across diverse populations, representing a common variation in the human genome.
Typical immune response profile
This genotype represents the homozygous state for the minor allele at this position. Like other genotypes at this locus, it is situated in a region critical for immune function, but it does not act as a deterministic factor for health outcomes. Because the HLA-DRB1 gene is highly polymorphic, the clinical significance of this specific SNP is limited and should not be used to predict individual disease risk.
This genotype is present at varying frequencies globally, appearing as a common variant in most studied ancestral groups.
Understanding the Variant and Its Location
The rs6457327 variant is a single nucleotide polymorphism (SNP) situated on chromosome 6 at position 31,106,253. This region is part of the human leukocyte antigen (HLA) complex, a highly dense and complex area of the genome that is critical for immune system function. Because this area contains many genes involved in how the body recognizes foreign invaders, variations here are frequently studied for their potential to influence immune-mediated health outcomes. The rs6457327 SNP is considered a common variant, meaning it appears frequently across diverse human populations. In genetic research, identifying such variants helps scientists map the complex landscape of the HLA region, which is known for its high degree of genetic diversity and its central role in orchestrating the body's defense mechanisms against pathogens.
The Role of the HLA-DRB1 Gene
The HLA-DRB1 gene provides instructions for creating a protein that is a vital component of the immune system. This protein, known as the beta chain, pairs with another protein to form the HLA-DR antigen-binding heterodimer. This complex acts like a molecular scanner, presenting pieces of proteins (peptides) to T-cells, which are specialized immune cells. By doing so, the HLA-DR complex helps the immune system distinguish between the body's own healthy proteins and those belonging to foreign invaders like bacteria or viruses. Because of this fundamental role, variations in the HLA-DRB1 gene can alter how the immune system perceives and reacts to different antigens. This makes the gene a primary focus in studies regarding autoimmune diseases, where the immune system mistakenly attacks the body's own tissues.
Research Associations and Evidence Strength
Research has identified rs6457327 as a marker of interest in several immune-related studies. Specifically, the 'C' allele of this SNP has been associated with an increased risk for follicular lymphoma, a type of non-Hodgkin lymphoma, with some studies reporting an odds ratio of approximately 1.47. Additionally, because this variant resides within the HLA-DRB1 locus, it is often investigated in the context of broader autoimmune susceptibility. While the evidence linking this specific SNP to immune regulation is considered moderate, it is important to note that the HLA region is notoriously complex. Associations found in one population may not always replicate in others due to the high level of genetic variation in this part of the genome. Current research continues to explore how these variants influence the quality of T-cell responses and overall disease vulnerability.
What This Information Means for You
It is important to understand that having a specific genotype for rs6457327 does not mean you will develop a disease. Genetic associations are statistical observations across large groups of people, not individual medical predictions. Many factors, including environment, lifestyle, and the interaction of thousands of other genes, contribute to health outcomes. This information is intended for educational purposes to help you understand the role of genetics in immune function. If you are concerned about your health, your risk for autoimmune conditions, or your family medical history, you should consult with a qualified healthcare provider or a genetic counselor. They can provide context based on your personal health history and guide you on appropriate screenings or clinical evaluations. Never use genetic data to make medical decisions or change medications without professional guidance.
How common is this variant?
The rs6457327 variant is common, with a Global Minor Allele Frequency (GMAF) reported at approximately 0.3347 in major genomic databases.
Frequently asked questions
Does having the C allele mean I will get lymphoma?
No. The association between the C allele and follicular lymphoma is statistical, meaning it is observed more frequently in groups with the disease compared to those without. It is not a diagnostic test and does not determine your personal health outcome.
Is rs6457327 the same as an HLA type?
No. rs6457327 is a single nucleotide polymorphism (SNP) within the HLA-DRB1 gene region. HLA types, such as HLA-DRB1*04:01, refer to specific protein versions (alleles) of the gene, which are much more complex than a single SNP.
Can I change my risk associated with this variant?
Genetic variants are inherited and cannot be changed. However, maintaining a healthy lifestyle and working with your doctor to manage your overall immune health are the best ways to support your well-being regardless of your genetic profile.
Where can I find more information about my specific HLA genes?
If you are interested in your specific HLA profile for medical reasons, you should speak with a physician or a clinical geneticist. They can order specialized clinical testing that is far more detailed than the information provided by a single SNP.
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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