Assessment of Immune Activation and Tolerance in Celiac Disease During Gluten Challenge
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|ClinicalTrials.gov Identifier: NCT03409796|
Recruitment Status : Completed
First Posted : January 24, 2018
Results First Posted : August 18, 2020
Last Update Posted : August 18, 2020
|Condition or disease||Intervention/treatment||Phase|
|Celiac Disease||Dietary Supplement: Gluten||Not Applicable|
Gluten challenge studies are used to test the effectiveness of therapies designed to prevent immune response to gluten in participants with CeD. The study will enroll approximately 20 participants. Participants will be randomly assigned (by chance, like flipping a coin) in a 1:1 ratio to one of the two treatment groups:
- Group A: Gluten 3 gm
- Group B: Gluten 10 gm
All participants will be asked to take an oral dose of gluten at the same time on Days 1 to 14 throughout the study. This multi-center trial will be conducted in the United States. The overall time to participate in this study is 10 weeks. Participants will visit to the clinic on Day -45 and will be contacted for follow-up assessment on Days 15 to 42.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||16 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
|Official Title:||Assessment of Immune Activation and Tolerance in Celiac Disease During Gluten Challenge|
|Actual Study Start Date :||April 24, 2018|
|Actual Primary Completion Date :||May 2, 2019|
|Actual Study Completion Date :||May 2, 2019|
Group A: Gluten 3 gm
Gluten 3 gram (gm), powder, orally, once daily up to 14 days.
Dietary Supplement: Gluten
Group B: Gluten 10 gm
Gluten 10 gm, powder, orally, once daily up to 14 days.
Dietary Supplement: Gluten
- Change From Baseline in Small Intestine Histology Based on Villous Height to Crypt Depth (Vh:Cd) Ratio [ Time Frame: Baseline and Day 15 ]Attenuation of the effects of gluten exposure was assessed by measuring the change from baseline in villous height (Vh) to crypt depth (Cd) ratio after 15 days of gluten challenge. Villi were the small finger like projections that line the small intestine and promote nutrient absorption and are often shortened in participants with CeD. Crypts were grooves between the villi that are often elongated in participants with CeD. A decreased Vh:Cd ratio indicates more extreme CeD disease symptoms. Baseline values was defined as the last observed value before the first dose of gluten.
- Change From Baseline in Small Intestine Histology Based on Intraepithelial Lymphocytes (IEL) Counts [ Time Frame: Baseline and Day 15 ]IELs are white blood cells (WBCs) interspersed between epithelial cells of the small and large intestine where they function to preserve the integrity of the mucosal barrier by protecting the epithelium against pathogen or immune-induced pathology. Increased IELs count indicated more extreme CeD disease symptoms. Baseline values was defined as the last observed value before the first dose of gluten.
- Correlation Coefficient Changes Between Gluten-specific Blood T Cells and Standard CeD Histological Assessments [ Time Frame: At Baseline, Days 6 and 15 ]Standard measures used for diagnosing CeD: Vh:CD ratio and IEL counts. T cell measurements taken before first dose of gluten were correlated with Baseline Vh:Cd ratio and IEL counts, and T cell measurements taken after first dose of gluten were correlated with Day 15 Vh:Cd ratio and IEL counts using Spearman correlation. Villi were small finger like projections that line small intestine, promote nutrient absorption and are often shortened in CeD participants. Crypts were grooves between villi that were often elongated in CeD participants. IELs were WBCs interspersed between epithelial cells of intestine where they function to preserve integrity of mucosal barrier by protecting epithelium against pathogen/immune-induced pathology. Decreased Vh:Cd ratio and increased IELs count indicated more extreme CeD symptoms. Baseline value: last observed value before first dose of gluten. Tr: T cell value taken before first dose of gluten. T6: T cell value at Day 6. T15: T cell value at Day 15.
- Change From Baseline in Gluten-specific T Cells in Blood Based on Enzyme-linked Immune Absorbent Spot (ELISPot) Assay and T Cell Receptor (TCR) Human Leukocyte Antigen Serotype (HLA-DQ2)-Tetramers [ Time Frame: Baseline and Day 6 ]ELISpot assay and gluten specific TCR measures drug response by quantifying changes in the number or function of gluten-specific T cells. Baseline value was defined as the last observed value before the first dose of gluten.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03409796
|United States, Massachusetts|
|Massachusetts General Hospital|
|Boston, Massachusetts, United States, 02114|
|Beth Israel Deaconess Medical Center|
|Boston, Massachusetts, United States, 02215|
|Study Director:||Medical Director Clinical Science||Takeda|