Epitopes described in "Measurement of gluten using a monoclonal antibody to a coeliac toxic peptide of A-gliadin."

Article Authors:H J Ellis; S Rosen-Bronson; N O'Reilly; P J Ciclitira
Article Title:Measurement of gluten using a monoclonal antibody to a coeliac toxic peptide of A-gliadin.
Reference Detail
Reference ID:1008384
Abstract:BACKGROUND: Future European Community regulations will require a sensitive and specific assay for measurement of coeliac toxic gluten proteins in foods marketed as gluten-free. To avoid spurious cross reactions with non-toxic proteins, specific antibodies and target antigens are required. A synthetic 19 amino acid peptide of A gliadin has been shown to cause deterioration in the morphology of small intestinal biopsy specimens of coeliac patients in remission. AIMS: To develop an assay for detection of gluten in foods, based on measurement of a known toxic peptide. METHODS: A monoclonal antibody raised against the toxic A gliadin peptide, with a polyclonal anti-unfractionated gliadin capture antibody, was used to develop a double sandwich enzyme linked immunosorbent assay (ELISA) for the measurement of gluten in foods. RESULTS: Standard curves for gliadin and for rye, barley, and oat prolamins were produced. The sensitivity of the assay was 4 ng/ml of gliadin, 500 ng/ml for rye prolamins, and 1000 ng/ml for oat and barley prolamins. The assay could detect gluten in cooked foods, although at reduced sensitivity. Prolamins from coeliac non-toxic rice, maize, millet, and sorghum did not cross react in the assay. A variety of commercially available gluten-free foods were analysed; small quantities of gluten were detected in some products. CONCLUSION: The assay may form the basis of a sensitive method for measurement of gluten in foods for consumption by patients with coeliac disease.
Affiliations:Gastroenterology Unit (UMDS), St Thomas's Hospital, London, UK.
Reference Type:Literature
PubMed ID:10189843
Journal Volume:43
Article Pages:190-5
Journal ISSN:1458-3288
Article Chemical List:Antibodies, Monoclonal;Glutens;Gliadin
Article MeSH List:Antibodies, Monoclonal; Enzyme-Linked Immunosorbent Assay(methods); Food Analysis(methods); Gliadin(immunology); Glutens(analysis); Reference Standards; Sensitivity and Specificity
Curation Last Updated:2015-06-05 01:14:42