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A Study to Learn How Well Dupilumab Works in Adult and Adolescent Participants With Eosinophilic Gastritis With or Without Eosinophilic Duodenitis and the Side Effects it May Have

NCT05831176

Active Not RecruitingPhase 2

Sponsor: Regeneron Pharmaceuticals

Conditions: Eosinophilic Gastritis (EoG), Eosinophilic Duodenitis (EoD), Eosinophilic Gastrointestinal Disease (EGID), Eosinophilic Gastroenteritis

Interventions: Dupilumab

Countries: United States, Canada, Italy, Japan

This study is researching an experimental drug called dupilumab. The study is focused on participants with active eosinophilic gastritis (EoG) with or without eosinophilic duodenitis (EoD). Participants with EoD only are not eligible for enrollment. EoG and EoD are uncommon, persistent, allergic/immune diseases in which eosinophils (a type of white blood cell) gather in large numbers in the stomach and small intestine and cause inflammation and damage. The aim of the study is to evaluate the effect of dupilumab on relieving EoG (with or without EoD) symptoms and reducing inflammation in the stomach and, if applicable, small intestine in adults and adolescents aged 12 years and older after at least 24 weeks (about 6 months) and up to 52 weeks (1 year) of treatment. The study is looking at several other research questions, including: * What side effects may happen from taking the study drug * How much study drug is in the blood at different times * Whether the body makes antibodies against the study drug (which could make the drug less effective or could lead to side effects)

Eligibility overview

Sex: ALL

Age: 12 Years to —

Healthy volunteers: No

Study type: INTERVENTIONAL

Eligibility criteria

Key Inclusion Criteria:

1. Adolescent participants will only be enrolled at study sites in countries/regions as permitted by local regulatory authorities and ethic committees (ECs)
2. Documented endoscopic biopsy supporting a pathologic diagnosis of Eosinophilic gastritis (EoG) at least 3 months prior to screening
3. Screening endoscopic biopsies with a demonstration of eosinophilic infiltration for a diagnosis of EoG, as defined in the protocol
4. Completed at least 11 of 14 days of EoG/EoD-SQ eDiary data entry in the 2 weeks prior to the baseline visit
5. History (by participant report) of at least 2 episodes of EoG (with or without EoD) symptoms per week in 8 weeks before screening, as defined in the protocol
6. An average TSS of ≥ 20 calculated using data collected via the EoG/EoD-SQ eDiary per week for the 2 weeks prior to baseline. An average severity score of ≥4 (on a scale of 0-10) per week for the 2 weeks prior to baseline for at least 2 of the 6 symptoms, as defined in the protocol.

Key Exclusion Criteria:

1. Body weight less than 40 kg at screening
2. Prior participation in a dupilumab clinical trial, or past or current treatment with dupilumab
3. Helicobacter pylori infection
4. Any esophageal stricture unable to be passed with a standard, diagnostic, upper endoscope or any critical esophageal stricture that requires dilation at screening
5. History of achalasia, Crohn's disease, eosinophilic colitis, ulcerative colitis, celiac disease, and prior gastric or duodenal surgery, as defined in the protocol
6. Other causes of gastric and, if applicable, duodenal eosinophilia or the following conditions: eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome) or hyper-eosinophilic syndrome
7. History of bleeding disorders, esophageal or gastric varices that, in the opinion of the investigator, would put the participant at undue risk for significant complications from an endoscopy procedure
8. Initiation or change of a food-elimination diet regimen or re-introduction of a previously eliminated food group in the 4 weeks prior to the screening visit. Participants on a food-elimination diet must remain on the same diet throughout the study
9. Planned or anticipated use of any prohibited medications and procedures during the study
10. Planned or anticipated major surgical procedure during the study
11. Receiving tube feeding or parenteral nutritional at screening

NOTE: Other Protocol Defined Inclusion / Exclusion Criteria Apply

Locations (53)

Phoenix, Arizona, United States
Apple Valley, California, United States
La Jolla, California, United States
Lancaster, California, United States
Los Angeles, California, United States
Los Angeles, California, United States
Los Angeles, California, United States
Murrieta, California, United States
San Francisco, California, United States
Aurora, Colorado, United States
Bristol, Connecticut, United States
Farmington, Connecticut, United States
Jacksonville, Florida, United States
Chicago, Illinois, United States
Kansas City, Kansas, United States
Boston, Massachusetts, United States
Ann Arbor, Michigan, United States
Plymouth, Minnesota, United States
Rochester, Minnesota, United States
Reno, Nevada, United States
Lebanon, New Hampshire, United States
Great Neck, New York, United States
New York, New York, United States
Chapel Hill, North Carolina, United States
Charlotte, North Carolina, United States
Durham, North Carolina, United States
Kinston, North Carolina, United States
Cincinnati, Ohio, United States
Columbus, Ohio, United States
Oklahoma City, Oklahoma, United States
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