RT Journal Article T1 Fecal Gluten Peptides Reveal Limitations of Serological Tests and Food Questionnaires for Monitoring Gluten-Free Diet in Celiac Disease Patients. A1 Comino, Isabel A1 Fernández-Bañares, Fernando A1 Esteve, María A1 Ortigosa, Luís A1 Castillejo, Gemma A1 Fambuena, Blanca A1 Ribes-Koninckx, Carmen A1 Sierra, Carlos A1 Rodríguez-Herrera, Alfonso A1 Salazar, José Carlos A1 Caunedo, Ángel A1 Marugán-Miguelsanz, J M A1 Garrote, José Antonio A1 Vivas, Santiago A1 Lo Iacono, Oreste A1 Nuñez, Alejandro A1 Vaquero, Luis A1 Vegas, Ana María A1 Crespo, Laura A1 Fernández-Salazar, Luis A1 Arranz, Eduardo A1 Jiménez-García, Victoria Alejandra A1 Antonio Montes-Cano, Marco A1 Espín, Beatriz A1 Galera, Ana A1 Valverde, Justo A1 Girón, Francisco José A1 Bolonio, Miguel A1 Millán, Antonio A1 Martínez Cerezo, Francesc A1 Guajardo, César A1 Alberto, José Ramón A1 Rosinach, Mercé A1 Segura, Verónica A1 León, Francisco A1 Marinich, Jorge A1 Muñoz-Suano, Alba A1 Romero-Gómez, Manuel A1 Cebolla, Ángel A1 Sousa, Carolina K1 Enfermedad celíaca K1 Dieta sin gluten K1 Ensayo de inmunoadsorción enzimática K1 Proteínas de unión al GTP K1 Gliadina K1 Glútenes K1 Humanos K1 Inmunoglobulina A K1 Masculino K1 Cooperación del paciente K1 Péptidos K1 Estudios prospectivos K1 Encuestas y cuestionarios K1 Transglutaminasas AB OBJECTIVESTreatment for celiac disease (CD) is a lifelong strict gluten-free diet (GFD). Patients should be followed-up with dietary interviews and serology as CD markers to ensure adherence to the diet. However, none of these methods offer an accurate measure of dietary compliance. Our aim was to evaluate the measurement of gluten immunogenic peptides (GIP) in stools as a marker of GFD adherence in CD patients and compare it with traditional methods of GFD monitoring.METHODSWe performed a prospective, nonrandomized, multicenter study including 188 CD patients on GFD and 84 healthy controls. Subjects were given a dietary questionnaire and fecal GIP quantified by enzyme-linked immunosorbent assay (ELISA). Serological anti-tissue transglutaminase (anti-tTG) IgA and anti-deamidated gliadin peptide (anti-DGP) IgA antibodies were measured simultaneously.RESULTSOf the 188 celiac patients, 56 (29.8%) had detectable GIP levels in stools. There was significant association between age and GIP in stools that revealed increasing dietary transgressions with advancing age (39.2% in subjects ≥13 years old) and with gender in certain age groups (60% in men ≥13 years old). No association was found between fecal GIP and dietary questionnaire or anti-tTG antibodies. However, association was detected between GIP and anti-DGP antibodies, although 46 of the 53 GIP stool-positive patients were negative for anti-DGP.CONCLUSIONSDetection of gluten peptides in stools reveals limitations of traditional methods for monitoring GFD in celiac patients. The GIP ELISA enables direct and quantitative assessment of gluten exposure early after ingestion and could aid in the diagnosis and clinical management of nonresponsive CD and refractory CD. Trial registration number NCT02711397. PB Nature Publishing Group SN 0002-9270 YR 2016 FD 2016-10-11 LK http://hdl.handle.net/10668/2726 UL http://hdl.handle.net/10668/2726 LA en NO Comino I, Fernández-Bañares F, Esteve M, Ortigosa L, Castillejo G, Fambuena B, et al. Fecal Gluten Peptides Reveal Limitations of Serological Tests and Food Questionnaires for Monitoring Gluten-Free Diet in Celiac Disease Patients. Am. J. Gastroenterol.. 2016 ; 111(10):1456-1465 NO JOURNAL ARTICLE; DS RISalud RD Apr 8, 2025