Reinventing the nutraceutical value of gluten: the case of L-theanine-gluten as a potential alternative to the gluten exclusion diet in celiac disease
2020
Abstract Functional foods have created an open environment for the development of new solutions to health-related issues. In celiac disease, there is still no therapeutic alternative other than the observance of a gluten-free diet. In this context, we developed a wheat flour enriched in L-theanine aimed to be a potential alternative to the gluten-free diet. Through microbial transglutaminase-catalysed transamidation of gluten proteins using ethylamine as amine nucleophile, substantial amounts of glutamine residues were converted in theanine residues. Furthermore, using T-cell lines generated from intestinal biopsy specimens of celiac disease patients, this treatment showed the potential to strongly reduce the ability of gluten proteins to stimulate a T-cell-mediated immune response. From a rheological point of view, the functionality of gluten was retained. Considering L-theanine’s evidence-based health benefits, a novel functional food is presented here and for celiac disease can be a path towards the development of an alternative to the gluten-free diet.
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