Celiac.com 10/24/2012 - Doctors can face challenges when attempting to diagnose celiac disease in patients who have already begun a gluten-free diet, and/or when the results of tests are inconsistent.

To better understand this problem, a group of researchers set out to assess the benefits of an in vitro gliadin challenge.

Photo: CC--US Army AfricaThe research team included Raffaella Tortora, MD, Ilaria Russo, PhD, Giovanni D. De Palma, MD, Alessandro Luciani, PhD, Antonio Rispo, MD, Fabiana Zingone, MD, Paola Iovino, MD, Pietro Capone, MD and Carolina Ciacci, MD.

The study cohort included 57 patients without celiac disease, 166 patients with untreated celiac disease, 55 patients with celiac disease on a gluten-free diet, and 59 patients with challenging diagnosis.

The team provided all patients with endoscopy for collection of duodenal samples, which served for the diagnosis of celiac disease and for the in vitro evaluation of the gliadin-induced mucosal expression of seven inflammatory markers: PY99, ICAM-1 (intercellular cell adhesion molecule),