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a4b7 Integrin in Eosinophilic Esophagitis

Study Purpose

The overall objective of this preclinical study is to further the investigators mechanistic understanding of the role that the α4β7 and mucosal addressin cell adhesion molecule (MAdCAM-1) pathway plays in mediating eosinophil recruitment in EoE. To accomplish this, the investigators aim to

  • (1) determine the baseline and dynamic patterns of α4β7 integrin expression on circulating and tissue eosinophils in EoE and in the setting of non-EoE esophageal eosinophilia (e.g., reflux esophagitis) and (2) determine the complete profile of eosinophil integrin molecules that may play a role in active EoE.

Recruitment Criteria

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

Accepts Healthy Volunteers

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.

Study Type
Eligible Ages 18 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

1. Able to give written informed consent 2. Male or female patients aged 18-65 years at time of screening 3. Confirmed active EoE at screening or within 8 weeks prior to baseline visit, as defined by esophageal mucosal eosinophils ≥15 per high power field (HPF, 400X magnification) despite at least 4 weeks of proton pump inhibitor (PPI) therapy with omeprazole 20 mg twice daily or the equivalent. updated 14APR2015 Page 8 of 19 4. Within the week prior to dosing, patient has one of the following symptoms of moderate, or worse, severity: dysphagia, vomiting, regurgitation, abdominal pain, chest pain/heartburn. 5. Maintained on a stabilized diet for at least 6 weeks prior to screening and during the course of the study; stable diet is defined as no initiation of single or multiple elimination diets or reintroduction of previously eliminated food groups. 6. Willing and able to comply with all clinic visits and study-related procedures 7. Able to understand and complete study-related questionnaires

Exclusion Criteria:

1. Another disorder that causes esophageal eosinophilia (e.g., hypereosinophilic syndrome, Churg-Strauss, parasitic infection) 2. History of abnormal gastric or duodenal biopsy or documented GI disorders other than EoE (e.g., celiac disease, Crohn's disease or H. pylori infection) 3. History of the following GI surgeries: fundoplication, gastric surgery or surgery for esophageal atresia 4. Use of systemic immunosuppressive or immunomodulating agents (oral prednisone, anti-immunoglobulin E (IgE) monoclonal antibody (mAb), methotrexate, cyclosporine, INFα, or anti-TNF) within six months prior to study entry. 5. A stricture on endoscopy that prevents passage of the endoscope 6. Participation in any investigational drug or device study within 30 days prior to study entry. 7. Female subjects who are pregnant or nursing. 8. Chronic infections such as HIV, hepatitis B or C, active mycobacterial (TB) or fungal infections. 9. Neoplasm or a history of malignancy in the preceding 5 years. 10. Concurrent infection or disease that may preclude assessment of eosinophilic esophagitis.

Trial Details

This trial id was obtained from ClinicalTrials.gov, 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.

Trial ID:

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.


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

Lead Sponsor
Massachusetts General Hospital

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

Principal Investigator
John J Garber, MD
Principal Investigator Affiliation Massachusetts General Hospital

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

Agency Class
Overall Status Active, not recruiting
Countries United States

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

Eosinophilic Esophagitis

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.

Massachusetts General Hospital, Boston, Massachusetts



Massachusetts General Hospital

Boston, Massachusetts, 02114

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