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Immune Response in Hypersensitivity Pneumonitis

NCT03873649 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 21

Last updated 2022-05-18

No results posted yet for this study

Summary

Hypersensitivity pneumonitis (HP) is an inflammatory lung disease that is caused by exposure of susceptible individuals to organic materials in the environment. It is also known by various names depending on the exposure and some of these names include farmer's lung, pigeon breeder's lung, hot tub lung to name a few. HP can cause lung scarring that impairs breathing and oxygenation. Early detection and avoidance of triggers can stop and reverse the disease but a significant number of patients continue to have active disease requiring treatment in spite of avoiding the trigger. The current choice of therapies is based on clinical experience and not on rigorous clinical trials. Not fully understanding the type of inflammation that is seen in HP and the cells involved in this inflammatory response limits health care providers' ability to choose drugs to study in HP that can stop the inflammation and limit scar formation. The goal of the investigators' study is to better understand the type of cells that are involved in the inflammatory response in the lungs of HP patients and what drives these cells to be active. By better understanding the type of cells and what drives them, health care providers can begin to choose and study drugs that can limit the inflammation and subsequent scarring. The investigators' will recruit HP patients and with their consent perform a scope of the lungs (bronchoscopy) with a limited lung wash to get the inflamed cells out of the lungs to further study them in the lab. The investigators' study will provide us with preliminary results to guide us in performing a more detailed study in the future to better understand the disease.

Conditions

  • Hypersensitivity Pneumonitis

Interventions

OTHER

Bronchoscopy with lavage

Bronchoscopy will be performed according to standard clinical procedures. Bronchoscopy will be performed under conscious sedation with continuous cardiopulmonary monitoring and the subject's upper airway will be anesthetized with topical lidocaine. The bronchoscope will be passed through the naris or mouth to the upper airway and then into the lower airway. 360cc of sterile saline will be instilled into 2 sub-segments by instilling and aspirating 3 aliquots of 60cc sequentially into each sub-segment. Venipuncture to obtain peripheral blood mononuclear cells (PBMCs) for the proposed assays. Cells collected will be analyzed for various T-cell subsets and gene expression to help determine the type of immune response.

Sponsors & Collaborators

  • National Jewish Health

    collaborator OTHER

  • Nabeel Hamzeh

    lead OTHER

Principal Investigators

  • Nabeel Hamzeh, MD · University of Iowa

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2018-11-29
Primary Completion
2021-06-30
Completion
2022-03-30

Countries

  • United States

Study Locations

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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 NCT03873649 on ClinicalTrials.gov