HLA-DQA1 rs2395185: What Your Genotype Means
The rs2395185 variant is a single nucleotide polymorphism located within the HLA-DQA1 gene region. It is statistically associated with variations in risk for certain autoimmune conditions, including celiac disease, ulcerative colitis, and type 1 diabetes.
What each genotype means
Baseline autoimmune risk profile
This genotype is associated with a lower risk of Type 1 Diabetes compared to other variants at this location. Research indicates it may be linked to a slightly increased risk of Ulcerative Colitis, though these associations are complex and influenced by many other genetic and environmental factors.
This is a common genotype found in many populations, though exact frequencies vary significantly by ancestry.
Intermediate autoimmune risk profile
Individuals with this genotype show a statistically higher risk of developing Type 1 Diabetes compared to those with the G/G genotype. Conversely, this genotype is associated with a lower risk of Ulcerative Colitis in some studies.
This heterozygous genotype is observed frequently across diverse populations.
Elevated Type 1 Diabetes risk
This genotype is associated with a significantly higher statistical risk of Type 1 Diabetes compared to the G/G and G/T genotypes. It is also associated with a lower risk of Ulcerative Colitis in population-based studies.
This genotype is less common than the heterozygous form and varies in prevalence depending on ancestral background.
Understanding the rs2395185 Variant
The rs2395185 variant is a specific genetic marker located on chromosome 6 within the human leukocyte antigen (HLA) complex. This region is highly complex and plays a central role in how the immune system distinguishes between the body's own proteins and foreign invaders. A single nucleotide polymorphism (SNP) like rs2395185 represents a variation at a single position in the DNA sequence. Because this SNP sits in a region critical for immune regulation, researchers often study it to understand how genetic differences might influence an individual's susceptibility to autoimmune disorders. It is important to note that this variant is often used as a 'tagging' SNP, meaning it serves as a proxy for larger, inherited blocks of DNA known as haplotypes that are more directly involved in immune function.
The Role of the HLA-DQA1 Gene
The HLA-DQA1 gene provides instructions for creating a protein that is a key component of the MHC class II molecule. These molecules are found on the surface of certain immune cells and are responsible for presenting fragments of proteins to T-cells, which are the 'commanders' of the immune response. By presenting these fragments, the HLA-DQA1 protein helps the immune system identify potential threats. Because there are hundreds of different versions of HLA genes, the immune system can recognize a vast array of foreign invaders. However, when these genes carry specific variations, the immune system may occasionally misidentify the body's own tissues as foreign, which is a hallmark of autoimmune conditions. The HLA-DQA1 gene is particularly well-studied in the context of celiac disease, where specific combinations of HLA variants are known to be permissive for the development of the condition.
Research Associations and Evidence Strength
Research into rs2395185 has identified statistical associations with several autoimmune conditions, though the strength of these links varies. Studies have observed that different genotypes at this position correlate with different levels of risk for type 1 diabetes and ulcerative colitis. For instance, some data suggest that the T allele may be associated with a higher risk of type 1 diabetes, while the G allele has been linked to different outcomes in ulcerative colitis. It is crucial to understand that these are statistical associations observed in large population studies, not direct causes of disease. The evidence for these associations is considered limited in some contexts, as the risk is often influenced by the broader genetic background and environmental factors. Because the HLA region is so complex, it is difficult to isolate the effect of a single SNP from the rest of the inherited haplotype.
Interpreting Your Genetic Information
If you have access to your genetic data regarding rs2395185, it is important to view this information as a piece of a much larger puzzle. Genetic markers are not diagnostic tools; having a specific genotype does not mean you will develop a disease, nor does the absence of a marker guarantee protection. Many people carry genetic variants associated with autoimmune risk without ever developing the condition. If you are concerned about your health or potential risks for autoimmune disorders, the most appropriate step is to consult with a healthcare professional or a genetic counselor. They can help you interpret your results in the context of your personal and family medical history. Never use genetic data to make medical decisions or change your lifestyle without professional guidance, as these associations are complex and often require clinical validation.
How common is this variant?
The minor allele frequency for rs2395185 is approximately 0.20 to 0.30 in populations of European ancestry.
Frequently asked questions
Does having the rs2395185 variant mean I have celiac disease?
No. This variant is a tagging SNP associated with the HLA-DQ2.5 haplotype, which is a risk factor for celiac disease, but it is not a diagnostic test. Many people carry these genetic markers without ever developing the condition.
Can I use this SNP to predict my risk of autoimmune disease?
Genetic markers like rs2395185 provide statistical information about population-level risks, not individual predictions. Autoimmune diseases are complex and involve many genes and environmental factors, making individual risk prediction difficult.
What should I do if I am worried about my genetic results?
If you are concerned about your genetic results, you should discuss them with a healthcare provider or a genetic counselor. They can help you understand what these findings mean in the context of your overall health and family history.
Is rs2395185 the same as the HLA-DQ2.5 test?
No. While rs2395185 is used as a marker to help identify the presence of the HLA-DQ2.5 haplotype, it is not the same as a clinical HLA typing test. Clinical tests look at the specific HLA alleles directly.
Sources & further reading
Educational information only, last refreshed 9/21/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Variant in the HLA-DQA1/DRB1 locus associated with peanut and tree nut allergy susceptibility.
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