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Short Wheat Challenge Offers an Easy, Reproducible Method for Detecting Immune Response to Gluten

Celiac.com 08/13/2012 - Research has indicated that giving small amounts of wheat-rich food to people with celiac disease, who are on a gluten-free diet, will trigger interferon (IFN)-γ-secreting T cells in the bloodstream. These T cells react to gluten, and can be easily detected.

Photo: CC--SD DirkHowever, very little is known about how this procedure might be reproduced in the same patient groups that underwent two, or more, gluten challenges. A team of researchers recently set out to assess the reproducability of this short wheat challenge method for detecting immune an response to gluten.

The research team included A. Camarca, G. Radano, R. Di Mase, G. Terrone, F. Maurano, S. Auricchio, R. Troncone, L. Greco, C. Gianfrani. They are affiliated with the Institute of Food Sciences-CNR, Avellino Department of Paediatrics and European Laboratory for the Investigation of Food-Induced Diseases, University of Naples, Naples, Italy.

They evaluated fourteen celiac patients in remission who consumed wheat bread for 3 days, along with thirteen patients who underwent a second gluten challenge after 3-10 months on a strict gluten-free diet.

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The team then analyzed the immune reactivity to gluten in peripheral blood by detecting IFN-γ both before and 6 days after patients began a a gluten-inclusive diet. They found that gliadin-specific IFN-γ-secreting CD4(+) T cells increased significantly by day 6 of the first challenge.

These cells arose as prevalently human leucocyte antigen (HLA)-DQ restricted and with a phenotype of gut homing, as suggested by the expression of β7-integrin. They also saw a reaction to gliadin after the second wheat consumption, although the responses varied by individual at each challenge.

The study showed that a short wheat challenge offers a non-invasive approach to investigate the gluten-related immune response in peripheral blood of people who are sensitive to gluten.

Moreover, the study showed that the procedure can be reproduced in the same subjects after a gluten wash-out of at least 3 months. The results of this study mean that we can likely expect this procedure to find its way into clinical practice in the future.

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you're lucky you dont catch colds. im the opposite i catch everything very easily and get alot sicker than whoever i caught it from and take much longer to get better.

Even one positive can be diagnostic. This is one: Gliadin deamidated peptide IgG 33.9. If unsure, a biopsy of the small intestine will provide definite confirmation. There is a control test to validate the other ones, but I don't see it there. What is does is validate the others by checking on the overall antibody levels. But it is to detect possible false negatives. A positive is a positive. I think your daughter has joined our club.

My daughter, almost 7 years old, recently had a lot of blood work done, her Dr is out of the office, but another Dr in the practice said everything looked normal. I'm waiting for her Dr to come back and see what she thinks. I'm concerned because there is one abnormal result and I can't find info to tell me if just that one test being abnormal means anything. The reason for the blood work is mainly because of her poor growth, though she does have some other symptoms. IgA 133 mg/dl Reference range 33-200 CRP <2.9 same as reference range Gliadin Deamidated Peptide IgA .4 Reference range <=14.9 Gliadin deamidated peptide IgG 33.9 Reference range <=14.9 TTG IgA .5 Reference range <=14.9 TTG IgG <.8 Reference range <=14.9

Just watch out. I just went to the expo in Schaumburg, IL, and ended up getting glutened. I realized afterward that I ate all these samples thinking they were gluten free, and they weren't. One company was advertising some sugar, and had made some cake, but then I realized.... How do I know if this contains any other ingredients that might have gluten? Did they make it with a blender or utensils that had gluten contamination? Makes me realize the only safe things would be packaged giveaways with gluten free labeling. My fault for not thinking things through. It was just too exciting thinking i could try it all and enjoy without worry.

No fasting required for a celiac blood test unless they were checking your blood glucose levels during the same blood draw.