Celiac.com 05/18/2021 - Microbial transglutaminase, also known as ‘meat glue,’ is an enzyme commonly used in the meat industry to “glue” together smaller pieces of fish or meat to make a single larger piece from numerous smaller chunks. Microbial transglutaminase is usually unlabeled and largely invisible to consumers.
We've done a few articles on this over the years, including What is Meat Glue, and Why is it Unsafe for People with Celiac Disease, and Meat Glue Ingredient Triggers Symptoms in Celiacs and Could Promote Disease.
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According to meat glue manufacturers, microbial transglutaminase and its related products are safe, nonallergenic, nonimmunogenic, and nonpathogenic. Most regulatory authorities say it is “generally recognized as safe” for public users. However, mounting data show that mTG functionally imitates its tissue transglutaminase, which is the autoantigen of celiac disease. That means that for people with celiac disease or gluten-intolerance, mTG could be harmful.
Researchers Aaron Lerner and Torsten Matthias recently set out to assess the potentially detrimental effects of microbial transglutaminase on celiac disease. They are affiliated with the AESKU.KIPP Institute, Mikroforum Ring 2 in Wendelsheim, Germany.
Both tissue transglutaminase and microbial transglutaminase mediate cross-linked complexes, which trigger immunogenic reactions in celiac patients. mTG enhances intestinal permeability, suppresses mucus and anti-phagocytic enteric protective barriers, stimulates luminal bacterial growth, and promotes the uptake of gliadin peptide.
Moreover, mucosal dendritic cell surface transglutaminase triggers gliadin endocytosis, and the enzyme-treated wheat products trigger immune reactions in celiac patients.
Looking to protect the at-risk individuals from potentially negative effects of the enzyme, the pair's recent review describes the potentially detrimental effects of mTG, and looks to promote scientific and regulatory discussion on the subject.
Read more in the special issue of International Journal of Molecular Science, titled, The World of Transglutaminases: From Basic Biological and Medical Research to Applied Sciences. Int. J. Mol. Sci. 2020, 21(3), 1127.
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