Innate Immunity in Eosinophilic Esophagitis

Eosinophilic Esophagitis Clinical Trial

— CLOE  

Official title:

Innate Lymphoid Cells in Eosinophilic Esophagitis (French Title : Cellules Lymphoïdes innées Dans l'Oesophagite à Eosinophiles)

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03640975
• Other study ID #: NI17020JHLJ
• Status: Completed
• Start date: July 11, 2018
• Est. completion date: October 28, 2019

Study information

• Verified date: April 2021
• Source: Assistance Publique - Hôpitaux de Paris
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

The main aim of this study is to assess the expression of innate lymphoid cells in the esophageal mucosa of children with eosinophilic esophagitis (EoE) and in control subjects

Description:

Children (aged 1 to 18 years) presenting with symptoms suggestive of EoE and requiring an upper gastrointestinal endoscopy with biopsies of the esophageal mucosa in order to confirm or exclude the diagnosis of EoE will be included.

Children paired for age in whom an endoscopy performed to explore symptoms of EoE revealed another condition (peptic oesophagitis, achalasia), or children paired for age in whom an endoscopy with biopsies has been performed to explore chronic abdominal or epigastric pain or suspected chronic inflammatory bowel disease, will be include as control subjects.

The endoscopy will be performed under general anaesthesia using a flexible endoscope with an external diameter of between 4.9 and 9.2 mm, depending on the size of the child. In line with the guidelines, eight biopsies will be collected from the proximal, median and distal oesophagus for the routine analysis of esophageal remodelling and inflammation. Three of these biopsies will be used in the context of this study to analyse innate immune cells using flow cytometry and to determine the profile of cytokine expression. Two biopsies will be placed in sterile, 0.5 ml Nunc tubes containing a storage buffer (MACS® Tissue Storage Solution) and then stored in ice until the extraction of cells for cytometric analysis. The third specimen will be placed in a sterile tube and frozen immediately in liquid nitrogen for analyses of the esophageal microbiome.

ILC1, 2 and 3 and their sub-types will be identified by means of structural criteria (size and granularity) and differential membrane and intracellular labelling using the specific markers shown below. All acquisitions and analyses will be achieved using a 13-colour NovoCyte cytometer (AACEA) and its associated software (NovoAxpressTM), which are available in the laboratory.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 35
• Est. completion date: October 28, 2019
• Est. primary completion date: October 28, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 1 Year to 18 Years

Eligibility

Inclusion Criteria:

• children 1-18 years

• presenting with symptoms suggestive of EoE

• requiring an upper gastrointestinal endoscopy with biopsies of the esophageal mucosa in order to confirm or exclude the diagnosis

• Children paired for age in whom an endoscopy performed to explore symptoms of EoE revealed another condition (peptic oesophagitis, achalasia), or children paired for age in whom an endoscopy with biopsies has been performed to explore chronic abdominal or epigastric pain or suspected chronic inflammatory bowel disease, will be include as control subjects

Exclusion Criteria:

• immune deficiency

• auto immune diseases

Related Conditions & MeSH terms

• Eosinophilic Esophagitis
• Esophagitis

Intervention

Other:
• Endoscopy
The endoscopy will be performed under general anaesthesia using a flexible endoscope with an external diameter of between 4.9 and 9.2 mm, depending on the size of the child. In line with the guidelines, eight biopsies will be collected from the proximal, median and distal oesophagus for the routine analysis of esophageal remodelling and inflammation. Three of these biopsies will be used in the context of this study to analyse innate immune cells using flow cytometry and to determine the profile of cytokine expression. Two biopsies will be placed in sterile, 0.5 ml Nunc tubes containing a storage buffer (MACS® Tissue Storage Solution) and then stored in ice until the extraction of cells for cytometric analysis . The third specimen will be placed in a sterile tube and frozen immediately in liquid nitrogen for analyses of the esophageal microbiome.

Locations

Country	Name	City	State
France	Necker-Enfants Malades Hospital	Paris

Sponsors (1)

Lead Sponsor	Collaborator
Assistance Publique - Hôpitaux de Paris

Country where clinical trial is conducted

France, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	The numbers of innate immune cells	The counts of innate immune cells will be compared between EoE patients and controls	1 year
Secondary	Microbiota	Analyses of the composition of the esophageal microbiome will be performed using 16S rDNA sequencing after the extraction of DNA according to published protocols and/or using commercial kits (QlAamp DNA stool Mini Kit; QIAGEN). The pyrosequencing of 16S DNA, the identification of groups and phyla and initial biostatistical analyses will be carried out by specialised platforms.	1 year
Secondary	Metabolomics	Metabolomic analyses will be performed on plasma and red blood cell extracts using a device such as an Orbitrap-Exactive equipped with an electrospray source. The data will be analysed using data processing tools available in the laboratory (software systems for signal detection and automatic alignment, annotation and statistical analysis)	1 year