Gluten Challenge Study in Celiac Disease Participants (MK-0000-402)

Study Purpose

This is a gluten challenge study to characterize peripheral blood and intestinal gluten specific cluster of differentiation 4 glycoprotein (CD4+) thymus lymphocyte (T cell) subsets in participants with Celiac Disease

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 18 Years - 70 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

1. Participant must have documented diagnosis with celiac disease (CeD) by duodenal/jejunal biopsy at least 6 months prior to entrance into the study. 2. Participant must be on a gluten-free diet (GFD) for at least the past 12 months. 3. Female participants must not be a woman of childbearing potential (WOCBP), pregnant or breastfeeding. 4. Must be Human leukocyte antigen (HLA)-DQ2.5 positive, assessed at screening. If participants have already been genotyped, results from previous testing may be used in lieu of genotyping at screening. 5. Has anti-tissue transglutaminase (anti-tTG) <2x upper limit of normal (ULN) as measured by serology. 6. Be judged to be in good health based on medical history, physical examination (including a targeted neurological exam), versus (vs.) measurements and electrocardiogram (ECG) performed prior to treatment allocation. 7. Have a body mass index (BMI) 18-35 kg/m2, inclusive.

Exclusion Criteria:

1. Has any chronic active gastrointestinal (GI) disease (eg, clinically active CeD despite being on GFD for past 12 months, Crohn's disease, ulcerative colitis, lymphocytic colitis). Inactive, stable/well-treated lactose intolerance, Fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAP) intolerance, gastroesophageal reflux disease (GERD), and irritable bowel syndrome (IBS) are allowed. 2. Has clinically active endocrine, gastrointestinal (other than CeD), cardiovascular, hematological, hepatic, immunological, renal, respiratory, genitourinary, or major neurological (including stroke and chronic seizures) abnormalities or diseases. Participants with a remote history of uncomplicated medical events or stable medical diseases with no symptoms and stable treatment for the past >3 months may be enrolled in the study at the discretion of the investigator. 3. Is mentally or legally incapacitated, has significant emotional problems at the time of prestudy (screening) visit or expected during the conduct of the study or has a history of clinically significant psychiatric disorder within the last 5 years. Participants who have had situational depression may be enrolled in the study at the discretion of the investigator. 4. Participant has an estimated Glomerular Filtration Rate (eGFR) ≤80 mL/min/1.73 m2 at the screening visit based on the Cockcroft-Gault (CG) equation. 5. Has a history of significant multiple and/or severe allergies (eg, food, drug, latex allergy), or has had an anaphylactic reaction or systemic allergic reaction to prescription or nonprescription drugs or food. 6. Subject has a history of severe acute symptomatic reactions to sporadic gluten ingestion. 7. Is positive for hepatitis B surface antigen, hepatitis C antibodies or human immunodeficiency virus (HIV). 8. Had major surgery, donated or lost 1 unit of blood (approximately 500 mL) within 4 weeks prior to the prestudy (screening) visit. 9. Is on Coumadin™ or other anticoagulants. 10. Is unable to refrain from or anticipates the use of systemic anti-inflammatory, immunosuppressive, or immunomodulatory medications, which may include ibuprofen > 2400 mg/day, naproxen >750 mg/day, prednisone >10 mg/day, or methylprednisolone > 8 mg/day, within 48 hours prior to the start of and throughout the entire gluten challenge. 11. Has participated in another investigational study within 4 weeks (or 5 half-lives, whichever is greater) prior to the prestudy (screening) visit. The window will be derived from the date of the last visit in the previous study. 12. Has a corrected QT (QTc) interval ≥470 msec (for males) or ≥480 msec (for females).

Trial Details

Trial ID:

This trial id was obtained from, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Early Phase 1
Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Merck Sharp & Dohme Corp.
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Medical Director
Principal Investigator Affiliation Merck, Sharpe & Dohme Corp.
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Celiac Disease
Additional Details

This is a multi-site, open-label gluten challenge study to characterize peripheral blood and intestinal gluten specific CD4+ T cell subsets in participants with celiac disease (CeD). Participants will receive 8 grams (g) of gluten daily for 13 consecutive days. Blood samples will be taken at pre-dose, Day 6, and Day 14. Duodenal biopsy samples will also be collected on Day 14. Participants will also complete a symptom diary.

Arms & Interventions


Experimental: Gluten challenge

Participants will receive a gluten 4 g powder twice daily (BID), for 13 consecutive days


Dietary Supplement: - Gluten powder 4g

Gluten powder 4g oral BID

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Boston, Massachusetts




Massachusetts General Hospital ( Site 0001)

Boston, Massachusetts, 02114

Site Contact

Study Coordinator


Boston, Massachusetts




Beth Israel Deaconess Medical Center ( Site 0002)

Boston, Massachusetts, 02215

Site Contact

Study Coordinator


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