Dose-Ranging Study of the Efficacy and Safety of TAK-101 for Prevention of Gluten-Specific T Cell Activation in Participants With Celiac Disease on a Gluten-Free Diet

Inclusion Criteria:

Biopsy-confirmed CeD that is well-controlled, defined as mild or with no ongoing signs or symptoms felt to be related to active CeD and with immunoglobulin A (IgA) tissue transglutaminase (tTG) <2 × upper limit of normal (ULN) and IgG deamidated gliadin peptide (DGP) <3 × ULN.

Note: Participants may be retested for IgA tTG and IgG DGP to meet eligibility criteria at the discretion of the investigator. Intermittent symptoms would not exclude participants from participation as long as symptoms are generally well controlled in the opinion of the investigator, and as long as symptoms are back to baseline for 2 weeks before the run-in gluten challenge.

1. Must be attempting to maintain a gluten-free diet (GFD) for ≥6 months.
2. Must be HLA-DQ2 and/or HLA-DQ8 positive during screening laboratory testing.

Exclusion Criteria:

1. Has received any investigational compound within 12 weeks (84 days) before signing of the informed consent or during the current study.
2. Has received TAK-101 (TIMP-GLIA) in a previous clinical study or as a therapeutic agent.
3. Has presence of inflammatory gastrointestinal disorders or autoimmune diseases, other than well-controlled autoimmune thyroid disease or well-controlled type 1 diabetes mellitus (defined as glycosylated hemoglobin <8% and no hospitalization in the last 12 months for hyper/hypoglycemia).
4. Has known or suspected refractory CeD or ulcerative jejunitis.
5. Has additional food allergies or intolerances that prevent participation in the food challenge.
6. Is receiving ongoing systemic immunosuppressant, systemic (oral or IV) corticosteroid treatment, or has received treatment with systemic immunosuppressants or corticosteroids in the 12 weeks before run-in gluten challenge.
7. Has known or suspected chronic liver disease or positive for hepatitis B or C.
8. Has intolerable symptoms after the run-in gluten challenge and is unwilling to undergo subsequent posttreatment gluten challenges.