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Celiac1 is a genetic name for DQB1, the HLA DQB1*0201, *0202, and *0302 encode genes that mediate the autoimmune coeliac disease. Homozygotes of DQB1*0201 have a higher risk of developing the celiac disease, relative to any other genetic locus. [10]
Coeliac disease (British English) or celiac disease (American English) is a long-term autoimmune disorder, primarily affecting the small intestine, where individuals develop intolerance to gluten, present in foods such as wheat, rye and barley. [10]
The results of a 2017 study suggest that non-celiac gluten sensitivity may be a chronic disorder, as is the case with celiac disease. [ 42 ] For people with wheat allergy , the individual average is six years of gluten-free diet, excepting persons with anaphylaxis, for whom the diet is to be wheat-free for life.
This condition is known as refractory coeliac disease (RCD), defined as malabsorption due to gluten-related enteropathy (villous atrophy or elevated intraepitheal lymphocytes) after initial or subsequent failure of a strict gluten-free diet (usually 1 year) and after exclusion of any disorder mimicking coeliac disease.
DQB1*0301 appears to be more associated with early onset myasthenia gravis in Japanese than DQ8, and was also found along with DQB1*0304 to be associated with Chinese MG. DQ7 or associated DR types may play a role in rheumatoid arthritis. In celiac disease the DQ7 (A*0505/1) can mediate celiac disease when HLA DQ2.2 is also present.
Celiac disease affects ~1% of the population in most parts of the world. [3] Ninety to one hundred percent of patients with coeliac disease have inherited genes at the HLA-DQ locus that encode HLA-DQ2 and/or HLA-DQ8 serotype proteins. [12] About 2–3% of individuals who inherit these HLA-DQ2 and/or HLA-DQ8 serotypes develop coeliac disease. [10]
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Celiac disease (or coeliac disease) is a chronic, immune-mediated intestinal disorder, in which the body becomes intolerant to gliadin, which is a component of gluten. [10] Individuals with celiac disease exhibit a lifelong intolerance of wheat, barley and rye – all of which contain prolamins. [ 11 ]