View Clinical Trial (Medical Research Study)


Fiberoptic Bronchoscopy in Patients With Asthma

Signup
Browse Studies

City:   Bethesda
State:   Maryland
Zip Code:   20892
Conditions:   Asthma
Purpose:   Fiberoptic bronchoscopy is a procedure which involves passing a pencil-thin tube into the lung in order to collect fluid and cells from the airways. Fiberoptic bronchoscopy can collect cells from the walls of airways by gently brushing them (bronchial brushing). In addition, squirting small amounts of sterile water in to the airway and gently suctioning it back into the bronchoscope (bronchoalveolar lavage) collects cells. In this study, researchers plan to perform these tests on patients with asthma and normal volunteers. This research may help to improve the understanding of the processes involved in airway inflammation and asthma.
Study Summary:   This tissue procurement protocol proposes to perform fiberoptic bronchoscopy with bronchoalveolar lavage, bronchial brushings exhaled brath condensates, and bronchial wall biopsies to evaluate the molecular mechanisms underlying the pathogenesis of airway inflammation and remodeling in asthmatic patients. The objective of this protocol is to assess the expression, regulation, and function of proteins regulating the release of soluble receptors and mediators from asthmatic inflammatory and structural cell populations, with a focus on the role of exosome-associated proteins and receptors in the regulation of airway inflammatory responses.
Criteria:   - INCLUSION CRITERIA: ASTHMATICS: Patients will be between 18 and 75 years of age, male or female. The diagnosis of asthma requires a history of intermittent, reversible expiratory flow limitation. In addition, patients will have either an abnormal methacholine challenge or evidence of ongoing reversible airway obstruction. An abnormal methacholine challenge will be defined as a decrease in FEV(1) of at least 20% following inhalation of less than or equal to 4 mg/ml of methacholine. Ongoing reversible airway obstruction will be defined as an improvement of at least 12% and 200 cc in either the FEV(1) or FVC folowing bronchodilator treatment. For women of childbearing potential, negative pregnancy test prior to study and willingness to adhere to reliable birth control methods during the study. EXCLUSION CRITERIA: ASTHMATICS: Diagnosis of a pulmonary disorder other than asthma (e.g., chronic bronchitis, cystic fibrosis, bronchiectasis, HIV-related lymphocytic airway inflammation). Respiratory tract infection or asthma exacerbation within 4 weeks of screening. History of adverse reactions to lidocaine or other local anesthetics. Allergy to methacholine. Use of aspirin within 2 weeks of the bronchoscopic study or non-steroidal anti-inflammatory agents within 2 days of the bronchoscopic study. History of cigarette smoking within the past 3 months. History of drug or alcohol abuse. Positive test for human immunodeficiency virus (to exclude patients with HIV-related lymphocytic airway inflammation). Post-bronchodilator FEV1 < 40% of predicted or pre-bronchodilator FEV1 < 35% of predicted. . Active bronchospasm on physical examination. History of lidocaine allergy. History of prior cardiac disease. For Bronchial Biopsies: PT and PTT greater than ULN. For Bronchial Brushings or BAL: - PT greater than 1 second above ULN or INR greater than 1.3. - PTT greater than 1 second above ULN. Platelet less than 150,00/ml. Hemoglobin less than 12 gm/dl for males and less than 11 gm/dl for females. Serum Creatine greater than 2.0. Liver function tests greater than 2 times upper limit of normal. Any condition that, in the investigator's opinion, places the patient at undue risk for complications from fiberoptic bronchoscopy, bronchalveolar lavage, bronchial brushings, or bronchial biopsies. INCLUSION CRITERIA - RESEARCH VOLUNTEERS: Research volunteers will be between 18 and 75 years of age, male or female. A negative inhalational methacholine challenge as defined bv the absence of a 20% decrease in FEV, following inhalation of 16 mg/ml of methacholine. For women of childbearing potential, negative pregnancy test within 2 weeks prior to study and willingness to adhere to reliable birth control methods during the study. EXCLUSION CRITERIA - RESEARCH VOLUNTEERS: Same as the asthmatic exclusion criteria plus a history of asthma.
NCT ID:   NCT00001888
Primary Contact:   Principal Investigator
Stewart J Levine, M.D.
National Heart, Lung, and Blood Institute (NHLBI)

Maryann M Kaler, C.R.N.P.
Phone: (301) 451-5916
Email: mk371e@nih.gov
Backup Contact:   Email: levines@nhlbi.nih.gov
Stewart J Levine, M.D.
Phone: (301) 402-1553
Location Contact:   Bethesda, Maryland 20892
United States

For more information at the NIH Clinical Center contact Patient Recruitment and Public Liaison Office (PRPL)
Phone: 800-411-1222
Email: prpl@mail.cc.nih.gov

Site Status: Recruiting

Data Source:   ClinicalTrials.gov
Date Processed:   September 16, 2014
Modifications to this listing:   Only selected fields are shown, please use the link below to view all information about this clinical trial.
Click to view Full Listing


  • NEARBY STUDIES

    (updated 35 minutes ago)
Within 25 Miles

Endometriosis - Washington DC

Osteoarthritis of the Knee - Silver Spring MD

Adolescent Major Depression (Ages 12-17) - Washington DC

Heart Failure After Heart Attack - Washington DC

Multiple Sclerosis - Washington DC

Healthy Volunteers - NY, NJ, PA, DE, DC, MD or VA

Diabetic Gastroparesis - Burke VA

High Cholesterol - Burke VA

Polycystic Kidney Disease (PKD) - Autosomal Dominant (ADPKD) - Arlington VA

Healthy Volunteers - Rockville MD

Polycystic Kidney Disease (PKD) - Autosomal Dominant (ADPKD) - Rockville MD

Asthma in Children (Ages 5-11) - Burke VA

Adolescent Major Depression (Ages 12-17) - Rockville MD

High Cholesterol - Oxon Hill MD

Asthma - Fairfax VA

Healthy Volunteers (Ages 18-50) - Silver Spring MD

Polycystic Kidney Disease (PKD) - Autosomal Dominant (ADPKD) - Bethesda MD

Diabetic Kidney Disease - Rockville MD

Diabetic Kidney Disease - Fairfax VA

Asthma - Columbia MD

Osteoporosis (resulting from steroid medication use) - Bethesda MD

Within 50 Miles

Type 2 Diabetes - Baltimore MD

Adolescent Major Depression (Ages 12-17) - Baltimore MD

Alzheimer's Disease - Baltimore MD

Temporomandibular Disorder (TMJD) - Baltimore MD

Healthy Volunteers (Age 18-55) - Baltimore MD

Healthy Volunteers (Age 18-45) - Baltimore MD

Healthy Volunteers (Age 18-65) - Baltimore MD

Healthy Volunteers (Age 18-60) - Baltimore MD

Healthy Volunteers (Age 18-49) - Baltimore MD

Healthy Volunteers (Age 25-40) - Baltimore MD

Healthy Male Volunteers (Age 18-65) - Baltimore MD

Diabetic Gastroparesis - Manassas VA

Ankle Sprain - Towson MD

Healthy Volunteers (Age 18-60) - Baltimore MD

Healthy Male Volunteers (Age 18-56) - Baltimore MD

Healthy Volunteers (Age 50-80) - Baltimore MD

Asthma - Baltimore MD

COPD (Emphysema and Chronic Bronchitis) - Towson MD

Healthy Male Volunteers (Age 18-35) - Baltimore MD

Healthy Female Volunteers (Age 18-35) - Baltimore MD

Healthy Female Volunteers (Age 50-65) - Baltimore MD

Healthy Male Volunteers (Age 18-65) - Baltimore MD

Eczema - Baltimore MD

Allergies - Baltimore MD

Healthy Female Volunteers (Age 18-39) - Baltimore MD

Healthy Volunteers (Ages 18-55) - Baltimore MD

Type 2 Diabetes - Nottingham MD

Within 100 Miles

Endometriosis - Hershey PA

Endometriosis - Newark DE

Pediatric Depression - Richmond VA

Asthma - Henrico VA

Adolescent Major Depression (Ages 12-17) - Richmond VA

Heart Failure After Heart Attack - Lemoyne PA

Dust Mite Allergy - Henrico VA

Chronic Idiopathic Constipation - Richmond VA

Eczema - Richmond VA

Pediatric Asthma - Richmond VA

Severe Asthma - Richmond VA

Children with Asthma - Richmond VA

Endometriosis - Richmond VA

Postmenopausal Osteoporosis - Richmond VA

Type 2 Diabetes - Winchester VA

Weight Management and Cardiovascular Disease - Henrico VA

COPD (Emphysema and Chronic Bronchitis) - Richmond VA

Asthma - Richmond VA

Asthma in Children (Ages 5 - Richmond VA