Exhaled Nitric Oxide as a Biomarker of Disease Activity in Eosinophilic Esophagitis

NCT ID: NCT01170234

Last Updated: 2019-04-16

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 14 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2010-08-31
• Study Completion Date: 2012-02-29

Brief Summary

There is currently no reliable, noninvasive biomarker for eosinophilic esophagitis (EoE), a chronic allergic diseases characterized by significant infiltration of eosinophils in the esophagus. Because eosinophils release nitric oxide, levels of exhaled nitric oxide (FeNO) are used routinely for guiding treatment in subsets of patients with asthma. FeNO levels are also elevated in immunological diseases that do not involve the airways. The investigators hypothesize that patients with EoE have elevated nitric oxide concentration in their exhaled breath and that changes in FeNO levels could be used to measure disease activity. The objective of this study is to determine the feasibility of using FeNO as a noninvasive surrogate marker for EoE disease activity. The investigators propose to measure serial exhaled nitric oxide (FeNO) levels on a group of patients with confirmed EoE, before, during and after the course of topical corticosteroid therapy to determine whether the level declines from pre-treatment level in individual patients.

Conditions

Eosinophilic Esophagitis

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

Eosinophilic esophagitis (EoE)

Treatment-naïve EoE patients, age 7 -65

NIOX MINO® Airway Inflammation Monitor

Intervention Type: DEVICE

We will measure exhaled nitric oxide of patients with eosinophilic esophagitis pre-, during and post- treatment at pre-defined time intervals.

Interventions

NIOX MINO® Airway Inflammation Monitor

We will measure exhaled nitric oxide of patients with eosinophilic esophagitis pre-, during and post- treatment at pre-defined time intervals.

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Age 7-65.
• Confirmed diagnosis of EoE. The diagnosis of eosinophilic esophagitis is based upon the presence of characteristic clinical features and large numbers of eosinophils in the esophagus on pathologic examination (≥15 eosinophils per high powered [400x] field in at least one specimen) despite acid suppression with a PPI for one to two months. The criteria also include normal gastric and duodenal mucosal biopsies and the exclusion of other causes. Clinical features in adults include dysphagia, pain and/or history of food impaction. Symptoms in children vary depending in part upon their age: feeding disorders (median age 2.0), vomiting (median age 8.1), abdominal pain (median age 12.0), dysphagia (median age 13.4), and food impaction (median age 16.8).

Exclusion Criteria

• Use of systemic or inhaled corticosteroids in the preceding 3 months.
• History of doctor-diagnosed asthma, acute or chronic rhinosinusitis.
• History of cirrhosis.
• History of kidney, heart or lung disease.
• Pregnancy

• Minimum Eligible Age: 7 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Tufts Medical Center

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

John Leung, MD

Role: PRINCIPAL_INVESTIGATOR

Tufts Medical Center

Locations

Tufts Medical Center

Boston, Massachusetts, United States

Countries

United States

References

Recommendations for standardized procedures for the on-line and off-line measurement of exhaled lower respiratory nitric oxide and nasal nitric oxide in adults and children-1999. This official statement of the American Thoracic Society was adopted by the ATS Board of Directors, July 1999. Am J Respir Crit Care Med. 1999 Dec;160(6):2104-17. doi: 10.1164/ajrccm.160.6.ats8-99. No abstract available.

Reference Type: BACKGROUND

PMID: 10588636 (View on PubMed)

Other Identifiers

TUFTS-EOE-FENO

Identifier Type: -

Identifier Source: org_study_id