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Evaluation of antigenicity of germinated barley foodstuff for the treatment of ulcerative colitis in a chronic murine colitis model

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Germinated barley foodstuff (GBF) contains insoluble protein and dietary fiber, and has the potential to attenuate diarrhea and colonic mucosal damage in colitis. Since GBF contains a poorly digested protein fraction, this protein may be transferred to and absorbed in the colon. It may therefore be possible to detect the GBF antigen in colitis patients with dysfunctional colonic mucosal barrier defense. In this study, the antigenic potency of GBF was examined in vivo and in vitro. Using the AOAC method, the indigestible fraction of GBF (dietary fiber) was obtained, and the poorly digested protein fraction in GBF was determined. Using Sprague Dawley rats with chronic colitis induced by dextran sulfate sodium (DSS, 2.5% in diet), a GBF and control diet were administered, and total and specific serum immunoglobulin E (IgE) against intestinal contents and the soluble GBF protein were determined. In addition, reactivity between serum and intestinal content were examined by gel electrophoresis mobility shift assay (EMSA). GBF showed relatively low protein digestibility (47%) because of its low solubility in neutral pH. Total serum IgE in both dietary groups was not significantly different, and specific IgE antibodies against intestinal contents and the soluble GBF protein were not significantly different. In addition, supershifts were not observed in either dietary group by EMSA. The possible antigenicity of oral GBF was considered to be low in this colitis model.
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Document Type: Research Article

Affiliations: Nutrient Food and Feed Division, Kirin Brewery Co. Ltd., Tokyo 104-8288, Japan

Publication date: January 1, 2001

More about this publication?
  • The International Journal of Molecular Medicine is a monthly, peer-reviewed journal devoted to the publication of high quality studies related to the molecular mechanisms of human disease. The journal welcomes research on all aspects of molecular and clinical research, ranging from biochemistry to immunology, pathology, genetics, human genomics, microbiology, molecular pathogenesis, molecular cardiology, molecular surgery and molecular psychology.

    The International Journal of Molecular Medicine aims to provide an insight for researchers within the community in regard to developing molecular tools and identifying molecular targets for the diagnosis and treatment of a diverse number of human diseases.
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