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The endomysium contains a form of transglutaminase called "tissue transglutaminase" or "tTG" for short, and antibodies that bind to this form of transglutaminase are called endomysial autoantibodies (EmA). [6] The antiendomysial antibody test is a histological assay for patient serum binding to esophageal tissue from primate.
Anti-transglutaminase antibodies result in a form of gluten sensitivity in which a cellular response to Triticeae glutens that are crosslinked to tTG are able to stimulate transglutaminase specific B-cell responses that eventually result in the production of anti-transglutaminase antibodies IgA and IgG.
Anti-transglutaminase antibodies are found in celiac disease and may play a role in the small bowel damage in response to dietary gliadin that characterises this condition. [2] In the related condition dermatitis herpetiformis , in which small bowel changes are often found and which responds to dietary exclusion of gliadin-containing wheat ...
Persons suspected of having celiac disease may undergo serological testing for IgA anti-tissue transglutaminase antibodies (abbreviated anti-tTG antibodies or anti-TG2 antibodies) and anti-endomysial antibodies (abbreviated EMA) provided the IgA-level is high, and if IgA is low, testing for certain IgG antibodies; in case of positive ...
Antibody recognition of gluten is complex. Direct binding to gluten such as anti-gliadin antibodies has an ambiguous pathogenesis in coeliac disease. The crosslinking of gliadin with tissue transglutaminase leads to the production of anti-transglutaminase antibodies, but this is mediated through T-cell recognition of gliadin.
Anti-enterocyte antibodies Probable Rare [24] Autoimmune hepatitis: Liver: ANA, ASMA, anti-LKM1 Confirmed 1 in 10,000 to 1 in 50,000 [25] Celiac disease: Small intestine: Anti-tissue transglutaminase antibodies (tTG), Endomysial antibody (EMA), Deamidated gliadin peptide (DGP) Confirmed 1 in 100 [26] Crohn's disease: Digestive tract
The IgG antibody is similar to AGA IgA, but is found at higher levels in patients with the IgA-less phenotype. It is also associated with coeliac disease and non-celiac gluten sensitivity. [5] [6] [7] Anti-gliadin antibodies are frequently found with anti-transglutaminase antibodies.
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...