HLA-DQ2 (celiac)

HLA-DQ2 is a genetic marker strongly associated with celiac disease, making it crucial for understanding and diagnosing this condition. Studies have consistently found that individuals with HLA-DQ2 are at a significantly higher risk of developing celiac disease compared to those without this allele. The presence of HLA-DQ2 also influences the clinical presentation and severity of the disease, with individuals carrying two copies (one from each parent) often experiencing more severe symptoms.

HLA-DQ2 is closely linked to immune responses that lead to gluten intolerance in celiac disease. It plays a key role in presenting specific gluten peptides to T-cells, triggering an autoimmune response that damages the small intestine. This genetic marker is also associated with other autoimmune conditions, though these connections are less well-established.

The relationship between HLA-DQ2 and celiac disease has been extensively studied, but individual responses can vary widely. The evidence for HLA-DQ2's role in celiac disease is robust, yet the exact mechanisms and interactions with environmental factors remain areas of ongoing research.

Sources

• A Clinician's Guide to Celiac Disease HLA Genetics. (PMID:31274511)
• <em>HLA-DQ2</em> and <em>HLA-DQ8</em> Alleles in Celiac Disease Patients and Healthy Controls. (PMID:35108783)
• A human autoimmune organoid model reveals IL-7 function in coeliac disease. (PMID:39048815)
• Influence of HLA-DQ2.5 Dose on Clinical Picture of Unrelated Celiac Disease Patients. (PMID:33317091)
• Epitope Selection for HLA-DQ2 Presentation: Implications for Celiac Disease and Viral Defense. (PMID:30926644)
• ACG clinical guidelines: diagnosis and management of celiac disease. (PMID:23609613)

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