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Implication of UNconventionaL T Lymphocytes in Cystic Fibrosis (UNLOCk)

NCT03886350 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 62

Last updated 2022-06-23

No results posted yet for this study

Summary

Cystic fibrosis (CF) is characterized by a decrease in mucociliary clearance, recurrent infections and airway inflammation. This inflammatory process in airway mucosa is persistent, uncontrolled, but, somewhat paradoxically, ineffective for pathogen clearance. Neutrophils are chronically recruited in the airway mucosa by proinflammatory mediators such as Interleukin (IL)-17. However, mechanisms involved in this dysregulated and persistent immune response are not well understood.

In this context, a heterogeneous subpopulation of T lymphocytes called "unconventional T cells" (UTC) should deserve greater attention. UTC play a key role in orchestrating the ensuing innate and adaptive immune responses and they are endowed with numerous regulatory and effector properties. UTC mainly establish residency at mucosal sites, including the lung. To date, however, data related to implication and behavior of UTC during cystic fibrosis are extremely limited.

The hypothesis is that, given UTC properties, their functions and behavior are altered in CF, and thus, these cells could be implicated in persistent inflammation and poor response to infections.

The objective is to study UTC properties and functions in cystic fibrosis using blood and sputum samples of patients with CF, in correlation with comprehensive clinical and microbiological data.

The study will enroll adult patients with CF followed-up at University Hospital of Tours, France. For each patient included, blood and sputum samples will be analyzed during 18 months 1/ from routine tests obtained at steady state and 2/ from tests performed during acute exacerbations. UTC will be explored in blood and sputum using flowcytometry approach, to evaluate their relative abundance, activation/inhibition profile and functions (cytokine production and cytotoxic ability). Correlation will be made with clinical status, with longitudinal comparison across the study period for each patient, and comparison with the other patients and healthy volunteers.

This study will add significant knowledge in CF immunopathology by comprehensively assess UTC presence, functions and activation in CF. Indeed, UTC could be explored for disease progression marker, and, in a long-term perspective, explored for therapeutic interventions aiming at modulating their function (by activating or inhibiting UTC), to reshape lung immune response during CF.

Conditions

Interventions

OTHER

blood and sputum samples

Blood and sputum samples for research purpose collected during routine tests performed at steady state and acute exacerbation

Sponsors & Collaborators

  • University Hospital, Tours

    lead OTHER

Principal Investigators

  • Youenn JOUAN, MD · University Hospital, Tours

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2019-04-03
Primary Completion
2020-07-16
Completion
2020-07-20

Countries

  • France

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03886350 on ClinicalTrials.gov