Clinical trial NCT02711397: Quantification of Gluten Peptides in Feces
Official title: Fecal Gluten Peptides Reveal Limitations of Serological Tests and Food Questionnaires for Monitoring Gluten-free Diet
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Celiac Disease
Lead sponsor: Biomedal S.L.
Sponsor class: OTHER
First posted: 2016-03-17
Enrollment: 272
Sex: ALL
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: CASE_CONTROL
Time perspective: PROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: Celiac patients following a GFD for at least one year prior to the inclusion in the study

Brief summary: Treatment for celiac disease (CD) is a lifelong strict gluten-free diet (GFD). Patients should be followed-up with dietary interviews and serologic tests for 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.

We performed a prospective, non-randomized, multicentre study including 188 CD patients on a GFD and 73 healthy controls on a gluten-containing diet. Subjects were given a dietary questionnaire and fecal GIP quantified by ELISA (iVYLISA GIP-S kit). Serological anti-tissue transglutaminase (anti-tTG) IgA and anti-deamidated gliadin peptide (anti-DGP) IgA antibodies were measured simultaneously.


Eligibility criteria: Inclusion Criteria:

* The study group consisted of celiac patients following a GFD for at least one year prior to the inclusion in the study and they were required to have an HLA-DQ2 or HLA-DQ8 haplotype and an histologically abnormal duodenal biopsy (grade Marsh IIIB or IIIC) at the time of diagnosis, supported by positive serum anti-endomysium IgA antibodies and/or anti-tissue transglutaminase (anti-tTG) IgA antibodies.
* The positive and negative control groups was comprised of healthy asymptomatic subjects in whom CD had been ruled out and who were not suspected of having any other gastrointestinal condition

Exclusion Criteria:

* All study patients included history of kidney or liver disease, and history of severe psychiatric disease or seizure disorder.

Primary outcomes:
measure: Adherence to gluten-free diet
timeFrame: two years
Secondary outcomes:
Other outcomes:
Locations:
Study officials:
affiliation: Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Seville
name: Carolina Sousa, PhD
role: STUDY_DIRECTOR
References:
citation: Comino I, Segura V, Ortigosa L, Espin B, Castillejo G, Garrote JA, Sierra C, Millan A, Ribes-Koninckx C, Roman E, Rodriguez-Herrera A, Diaz J, Silvester JA, Cebolla A, Sousa C. Prospective longitudinal study: use of faecal gluten immunogenic peptides to monitor children diagnosed with coeliac disease during transition to a gluten-free diet. Aliment Pharmacol Ther. 2019 Jun;49(12):1484-1492. doi: 10.1111/apt.15277. Epub 2019 May 10.
citation: Comino I, Fernandez-Banares F, Esteve M, Ortigosa L, Castillejo G, Fambuena B, Ribes-Koninckx C, Sierra C, Rodriguez-Herrera A, Salazar JC, Caunedo A, Marugan-Miguelsanz JM, Garrote JA, Vivas S, Lo Iacono O, Nunez A, Vaquero L, Vegas AM, Crespo L, Fernandez-Salazar L, Arranz E, Jimenez-Garcia VA, Antonio Montes-Cano M, Espin B, Galera A, Valverde J, Giron FJ, Bolonio M, Millan A, Cerezo FM, Guajardo C, Alberto JR, Rosinach M, Segura V, Leon F, Marinich J, Munoz-Suano A, Romero-Gomez M, Cebolla A, Sousa C. Fecal Gluten Peptides Reveal Limitations of Serological Tests and Food Questionnaires for Monitoring Gluten-Free Diet in Celiac Disease Patients. Am J Gastroenterol. 2016 Oct;111(10):1456-1465. doi: 10.1038/ajg.2016.439. Epub 2016 Sep 20.