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  • Title: A solid-phase radioimmunoassay for IgG gliadin antibodies using 125I-labelled staphylococcal protein A.
    Author: Troncone R, Pignata C, Farris E, Ciccimarra F.
    Journal: J Immunol Methods; 1983 Oct 14; 63(2):163-70. PubMed ID: 6352817.
    Abstract:
    A sensitive radioimmunoassay for IgG gliadin antibodies is described. Serum specimens were added to wells of plastic microtitre plates coated with gliadin. After removal of the unbound material, gliadin antibodies were detected by adding 125I-labelled staphylococcal protein A (125I-SpA). Serum specimens from coeliac patients on a normal diet or on a gluten-free diet were tested, as well as sera from an age-matched control group. Measurements to obtain precise quantitative values were made with gliadin antibody-rich serum as reference standard. High titres of gliadin antibodies were found in 18 out of 19 coeliac patients on a normal diet (95%); in patients on a strict gluten-free diet serum values did not exceed 2 S.D. of the control mean. Due to the high sensitivity of the method a low but detectable amount of gliadin antibody was present in the sera of all controls.
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