Induction of Neutrophilic Traps ( NETs ) by the Environment and Infectious Inflammatory Lung Cystic Fibrosis

Completed

• Conditions: Cystic Fibrosis

• Registration Number: NCT02564393
• Lead Sponsor: University Hospital, Tours

Brief Summary

The study is defined in 3 stages of in vitro assays :

Phase 1 : Secretion of NETs in response to lung disease and their secretion of factors.

This is a transversal study in which we compare :

* Producing NETs (DNA and proteases ) by neutrophils purified from sputum and blood of patients

* Producing NETs (DNA and proteases ) by purified neutrophils in the blood of patients and blood of control subjects

Phase 2: Mechanisms of activation of NETs secretory pathways . This phase will identify receptors (TLR ) involved in the secretion of NETs and analyze the involvement of dependent transduction pathways calcium and PKC . It will be performed on control blood neutrophils.

Phase 3: Analysis of cell death ( NETose )

This is a transversal study that will analyze :

the mode of cell death of neutrophils purified blood and sputum of patients and control blood neutrophils by flow cytometry and transmission electron microscopy .

Detailed Description

Not available

Study Timeline

• Study Start: 2011-05
• Primary Completion: 2013-05
• Status Verified: 2015-09
• Study First Submitted: 2015-09-29
• Study First Submitted QC: 2015-09-29
• Last Update Submitted: 2015-09-29
• Study First Posted: 2015-09-30
• Last Update Posted: 2015-09-30

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 55

Inclusion Criteria

Patients :

• Men or women over 18
• Patients with mucoviscidose in stable condition, i.e. not having presented an acute push of bronchopulmonary attack requiring a antibiothérapie or a hospitalization for treatment of its disease during the 2 previous weeks
• Signed consent

Volunteers :

• Men or women over 18
• Without respiratory antecedent nor known respiratory pathology
• Signed consent

Exclusion Criteria

Patients :

• In exclusion period of an other study

Volunteers :

• In exclusion period of an other study
• Antibiotic treatment and/or anti-inflammatory drug (AINS or corticoids) in the 2 weeks before inclusion in the study

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
the DNA concentration secreted into the extracellular environment neutrophil activated	1 hour

Trial Locations

Locations (1)

CHRU de Tours; 🇫🇷 Tours, France