Noninvasive Markers of Gluten Ingestion in Celiac Disease Patients

Adult Form of Celiac Disease Clinical Trial

Official title:

Noninvasive Markers of Gluten Ingestion in Celiac Disease Patients: Prospective, Randomized,Placebo Controlled, Double Blind Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02389062
• Other study ID #: 14D.389
• Status: Completed
• Phase: N/A
• Start date: February 11, 2015
• Est. completion date: February 11, 2017

Study information

• Verified date: July 2019
• Source: Thomas Jefferson University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is a clinical trial to evaluate the sensitivity of noninvasive, novel markers of gluten ingestion in celiac disease patients who are following gluten free diet for at least a period of one year. These noninvasive markers may be helpful to monitor the silent intestinal damage, possibly resulting from the accidental consumption of gluten due to cross contamination of gluten free diet.

Description:

The gold-standard for monitoring of dietary adherence is consultation with an expert dietitian, but this may be time-consuming for patients and local expertise may not be available. Intestinal biopsy is the only direct method to document mucosal healing and can be considered in all adults with celiac disease. Non-invasive assessment of compliance with a gluten free diet(GFD) can be achieved with monitoring of IgA antibodies to tissue transglutaminase (IgA-tTG) or deamidated gliadin peptides, as these markers improve with gluten elimination. However, intestinal mucosal damage is present in a significant number of patients who report compliance with a gluten free diet and have normalized serology, potentially due to dietary lapses or unrecognized contamination with gluten. Furthermore, serologic testing may be normal in patients with partial adherence. Patient reported surveys show promise for assessing gluten free diet adherence, but further studies are needed.

Intestinal fatty acid-binding protein (I-FABP), a small (15 kD) cytosolic protein found exclusively in the small bowel enterocytes, has been studied as a marker of intestinal epithelial damage in septic shock and mesenteric ischemia. More recently, elevated levels of intestinal fatty acid-binding protein( I-FABP) have been described as a marker of intestinal injury in both adults and children with celiac disease. Intestinal fatty acid binding protein, (I-FABP) levels have been shown to significantly correlate with the degree of villous atrophy and IgA antibody to tissue transglutaminase (IgA-tTG), as well as decrease upon treatment with a gluten free diet(GFD). Incomplete normalization of intestinal fatty acid binding protein(I-FABP) on a gluten free diet points to ongoing intestinal injury, even in the absence of circulating antibodies, thus suggesting its potential as a non-invasive marker for gluten free diet adherence and intestinal damage in celiac disease.

The measurement of gluten immunogenic peptides (GIP) in stool is a novel method to monitor gluten free diet compliance. Recently, a technique to detect gliadin 33-mer equivalent peptide epitopes (33EPs) in the stool of pediatric patients has been described. These peptides show significant resistance to digestion and were detected in healthy individuals after normal gluten-containing diet ingestion. Importantly, these peptides are not detected in patients on a gluten free diet, and there appears to be a correlation between the amount of gluten intake and the peptide levels. A similar test has been developed for gluten intestinal peptide(GIP) detection in urine, although there are currently no peer-reviewed studies examining this technique. Further research on the utility of stool and urine gluten intestinal peptide (GIP)for monitoring of gluten free diet (GFD) adherence is warranted.

Given the lack of a non-invasive and accurate measure of gluten intake in celiac disease (CD), the investigators will investigate the effect of gluten intake in celiac disease (CD) patients using a variety of markers. Patients who are symptom-free on a gluten free diet (GFD) will be exposed to various amounts of gluten. Factors that will be studied include the effect on patient estimated gluten intake, Celiac disease symptoms, IgA-tTG level,intestinal fatty acid binding protein( I-FABP) level, and both stool and urine gluten peptide levels.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 5
• Est. completion date: February 11, 2017
• Est. primary completion date: February 11, 2016
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 80 Years

Eligibility

Inclusion Criteria:

• This study population will consist of patients with a prior diagnosis of celiac disease based on intestinal biopsy (Marsh score of 1-4) who report control of symptoms with adherence to gluten free diet(GFD) for at least one year and have a baseline IgA antibody to tissue transglutaminase(IgA-tTG) within the normal range.

Exclusion Criteria:

• Patients < 18 years of age

• Patients with refractory celiac disease (RFD), defined as persisting or recurring symptoms and mucosal villous atrophy, despite strict adherence to a gluten free diet (GFD) for >12 months and a negative IgA antibody to tissue transglutaminase (IgA-tTG)

• Patients with enteropathy-associated T-cell lymphoma

• Patients with IgA deficiency

• Patients with a diagnosis of inflammatory bowel disease, irritable bowel symptoms, or acute gastroenteritis

• Patients taking immunosuppressive medications

• Patients who are pregnant

• Patients who are breast feeding/lactating

Related Conditions & MeSH terms

• Adult Form of Celiac Disease
• Celiac Disease

Intervention

Other:
• Administration of gluten( food /wheat protein) capsules or placebo(cornstarch) capsules and tests for novel markers will be done at intervals.
After administering the capsules for 16 weeks during study periods, patients's blood will be tested for novel markers- Intestinal fatty acid binding protein(I-FABP), stool for gluten intestinal peptide (GIP), urine for gluten intestinal peptide(GIP), patient estimated gluten intake(PEGI), celiac severity index(CSI), Celiac dietary adherence test(CDAT) by standard questionnaire provided during the visits. These tests will be done over a period of 16 weeks and at a follow up 3 months later.

Locations

Country	Name	City	State
United States	Thomas Jefferson University	Philadelphia	Pennsylvania

Sponsors (1)

Lead Sponsor	Collaborator
Thomas Jefferson University

Country where clinical trial is conducted

United States, 

References & Publications (28)

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* Note: There are 28 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	1) Change in the patient estimated gluten intake after administration of study pills using the Celiac Dietary Adherence Test (CDAT), to be assessed at the end of follow up week 12		up to follow up week 12
Primary	Change in the Celiac disease symptoms, using the Celiac Symptom Index (CSI) after administration of study pills; to be assessed at the end of follow up week 12	questionnaire	up to follow up week 12
Primary	Change in IgA antibody to tissue transglutaminase (IgA-TTG) levels after administration of study pills, to be assessed at the end of follow up week 12.	lab	up to follow up week 12
Primary	Change in Intestinal fatty acid binding protein (I-FABP) levels after administration of study pills, to be assessed at the end of follow up week 12.	lab	up to follow up week 12
Primary	Change in stool gluten intestinal peptide (GIP) level after administration of study pills, to be assessed at the end of follow up week 12	lab	up to follow up week 12
Primary	Change in urine gluten intestinal peptide (GIP) level after administration of study pills,to be assessed at the end of follow up week 12	lab	up to follow up week 12
Primary	Change in patient estimated gluten intake(PEGI) after administration of study pills, using separate questionnaire, to be assessed at the end of follow up week 12	questionnaire	up to follow up week 12