Candidates for 2016 ERP of the Year

ERP PROFILE SUMMARIES

General comments about the method: ER 1

The method onto itself performs as would be expected for a Competitive ELISA. This means, that the precision of the results and sensitivity are acceptable . However, in the documentation language is at times used that with a few minor tweaks may correct any misleading aspects (e.g., the sensitivity of the Competitive ELISA is not better than that of the Sandwich. Instead, the Sandwich ELISA is inappropriate for the detect not hydrolyzed gluten making it unreliable due to variability in the number of antigenic epitopes associated with proteolysis. Good that all labs that participated in the study were familiar with ELISA tests, but probably would be valuable to have experience with competitive ELISA tests. Also, the RIDASOFT cubic spline function calculation is much different than the typical gliadin/gluten tests and requires a higher understanding of what is going into this calculation. This configuration of the R5 ELISA format has a definite advantage over the current sandwich format and will be a valuable tool for measuring gluten in certain matrices. This method should provide a more accurate assessment of the gluten in products where gluten is randomly hydrolyzed. The competitive ELISA based on R5 antibody may be better than the sandwich format for hydrolyzed gluten as it requires one epitope for effective binding. The accuracy of the method needs to be evaluated towards not only the PT digest, but other hydrolyzed form with known gluten concentration as well. data indicates this is a fit-for-purpose method. Samples are extracted by a simple sample preparation and analyzed within 40 minutes.

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ER 7 ER 8 Pros/Strengths of the Manuscript: ER 1

The existence of competitive ELISAs is a strength and needed format for gluten methodology. Naturally gluten-contaminated starch syrup was included as one of the samples.

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all required sections are included

The R5 ELISA is commercially available. The Competitive ELISA which was selected for the determination of partially hydrolysed gluten is more sensitive than the R5 Sandwich ELISA. The Competitive Assay quantitates beside intact prolamins, peptide fragments of prolamins from wheat (gladins), rye (secalin), and barley (hordein). Good approach towards detection of hydrolyzed gluten as currently this is a big challenge. Uses R5 antibody which is well characterized. The in-house validation is extensive and provides useful information on the method. The method shows good precision. I found the manuscript concise and ordered appropriately.

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