Collection of Lung Fluid and Tissue Samples for Research
|First Received Date ICMJE||May 8, 2007|
|Last Updated Date||November 27, 2013|
|Start Date ICMJE||May 2007|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00471250 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Collection of Lung Fluid and Tissue Samples for Research|
|Official Title ICMJE||Research Respiratory Tract Procedures|
This study will collect fluid and tissue specimens from the lungs and nose of healthy people and people with a history of lung infections. The specimens will be examined for differences between the two groups that may be associated with susceptibility to certain infections.
Healthy normal volunteers and people with a history of lung infections between 18 and 75 years of age who are followed at NIH may be eligible for this study.
Participants undergo the following procedures:
Medical history and physical examination.
Blood and urine tests.
Electrocardiogram (ECG) and chest x-ray.
Treadmill exercise stress test (for people over 45 years old with a history of chest pain or ECG abnormalities).
Bronchoscopy: The subject s nose and throat are numbed with lidocaine and a sedative is given for comfort. A thin flexible tube called a bronchoscope is advanced through the nose or mouth into the lung airways to examine the airways carefully.
Fluid collection during the bronchoscopy using one of the following methods:
This research protocol involves one or more of the following procedures in healthy volunteers and patients with known or suspected predisposition to respiratory infection who are enrolled in National Institutes of Health (NIH) protocols: 1) Adults only: bronchoscopy with sampling of bronchoalveolar lavage fluid and epithelial cells in healthy adult volunteers and patients; 2) Adults and Children: sputum induction for collection of sputum specimens; 3) Adults and Children: nasal mucosal biopsies and brushings for sampling of epithelial cells. The cellular and acellular samples will be separated, and stored or transferred to the appropriate laboratories investigating these diseases.
Alveolar macrophages are the predominant (greater than 95%) cell type present in the lavage of normal subjects. Alveolar macrophages play a central role in the initiation and propagation of lung inflammation by releasing cytokines (i.e., interleukin-1, tumor necrosis factor) and chemokines (i.e., interleukin-8, monocyte chemotactic protein, macrophage inflammatory protein) that activate other resident cells and recruit inflammatory cells to a local nidus of inflammation. Airway epithelial cells are known to release a variety of mediators as well. Thus, the interaction of cells with mediators generated by alveolar cells and bronchial epithelial cells during acute inflammation is a key element in the initiation of pulmonary inflammatory responses.
Bronchoalveolar lavage (BAL), bronchial brushings, and mucosal biopsies are standard diagnostic techniques done through the bronchoscope to obtain samples of alveolar and bronchial specimens for diagnosis of infection, malignancy, or non-infectious inflammation. Nasal mucosal scrape biopsy is a minimally invasive method of obtaining airway epithelial cells to diagnose disorders of airway clearance associated with abnormal cilia (hair-like structures on airway lining cells). Sputum induction is a routinely performed procedure to facilitate the collection of respiratory secretions (mucus) through stimulation of cough with inhalation of an aerosolized concentrated salt-water solution.
The objective of this protocol is to analyze bronchoalveolar lavage fluid, airway epithelial cells, and sputum specimens from healthy volunteers and from patients who acquire respiratory infections to look for differences in immune function and to discover new pathways of infectious disease susceptibility. We hypothesize that studying cellular responses to infection and inflammatory markers released from these cells will further our understanding of human susceptibility to respiratory tract infections.
Five hundred and fifty subjects (250 healthy volunteers and 300 patients) will undergo one or more of the following: 1) bronchoscopy with bronchoalveolar lavage, bronchial brushings, endobronchial biopsies; 2) nasal mucosal scrape and/or brush biopsies; 3) sputum inductions to obtain specimens for in vitro investigations and comparisons of both the cellular and acellular components.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Time Perspective: Prospective|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Estimated Enrollment ICMJE||550|
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
HEALTHY VOLUNTEER EXCLUSION CRITERIA FOR BRONCHOSCOPY AND BRONCHOSCOPIC PROCEDURES:
PATIENT INCLUSION CRITERIA FOR BRONCHOSCOPY AND BRONCHOSCOPIC PROCEDURES
PATIENT EXCLUSION CRITERIA FOR BRONCHOSCOPY AND BRONCHOSCOPIC PROCEDURES
HEALTHY VOLUNTEER INCLUSION CRITERIA FOR NASAL MUCOSAL BIOPSY:
HEALTHY VOLUNTEER EXCLUSION CRITERIA FOR NASAL MUCOSAL BIOPSY:
PATIENT INCLUSION CRITERIA FOR NASAL MUCOSAL BIOPSY
PATIENT EXCLUSION CRITERIA FOR NASAL MUCOSAL BIOPSY:
PATIENT INCLUSION CRITERIA FOR SPUTUM INDUCTION:
PATIENT EXCLUSION CRITERIA FOR SPUTUM:
|Ages||18 Years to 75 Years|
|Accepts Healthy Volunteers||Yes|
|Location Countries ICMJE||United States|
|NCT Number ICMJE||NCT00471250|
|Other Study ID Numbers ICMJE||070142, 07-I-0142|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Institute of Allergy and Infectious Diseases (NIAID)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||August 2013|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP