N/A
N=84
Airway Microbiome in Asthma: Relationships to Asthma Phenotype and Inhaled Corticosteroid Treatment
Asthma · Atopy
Bottom Line
View on ClinicalTrials.gov: NCT01537133 ↗Enrolled (actual)
84
Serious AEs
0.0%
Results posted
Nov 2016
Primary outcome: Primary: Microbial Community Richness — 449; 543; 483; 444 number of bacterial taxa
Study Design & Population
- Study type
- Interventional
- Phase
- N/A
- Interventions
- fluticasone (Drug); Placebo (Drug)
- Age
- Adult · 18+ yrs
- Sex
- All
- Sponsor
- Milton S. Hershey Medical Center
- Primary completion
- Jul 2014
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Microbial Community Richness |
449; 543; 483; 444; 456; 405 | — |
| PRIMARY Microbial Community Diversity |
5.4; 5.7; 5.6; 5.3; 5.0; 5.1 | — |
| PRIMARY Microbial Community Evenness |
0.88; 0.88; 0.90; 0.86; 0.85; 0.86 | — |
Summary
There are new, very sensitive methods for detecting bacteria. These methods show that hundreds of millions of microbes (organisms that can only be seen with microscopes), especially bacteria, live in healthy people. The collection of different microbes found in a site is called a "microbiome." The investigators know that microbiomes of the skin, sinuses, mouth, gastro-intestinal tract, etc. differ from each other. The make-up of the microbiome - which bacteria are found in a site - may be necessary for good health. For example, the microbiome of the mouth is different in people with inflammation of the gums (periodontitis), and the microbiome of the bowel is different in people with inflammation of the intestinal tract (inflammatory bowel disease).
The purpose of this research study is to find out if the microbiome in the lungs is different in healthy people without asthma compared to people with asthma. This study will also find out if the microbiome of the lungs changes when people with asthma take a daily "controller" medication called an inhaled corticosteroid.
Eligibility Criteria
Inclusion Criteria
Asthmatic:
- History of physician-diagnosed asthma.
- Methacholine PC20 10 doses of nasal corticosteroids in the previous 3 months.
- Presence of significant medical illness or other chronic diseases whose treatment could affect the clinical features measured, responses to the therapies to be given in this study, or risks of participating in the study.
- History of atrial or ventricular tachyarrhythmia.
- Changes suggestive of cardiac ischemia on ECG at baseline.
- History of upper respiratory infection, sinusitis, bronchitis, or antibiotic use in the previous 3 months.
- History of chronic sinus disease.
- Smoking > 5 pack-years, or within the past year
- History of long-term controller medication use for asthma (inhaled or oral corticosteroid, leukotriene pathway antagonist, cromolyn, or theophylline within the preceding 6 months.
- History of bleeding disorder.
- Reduced creatinine clearance.
- Inability, in the opinion of the Study Investigator, to coordinate use of inhaler or otherwise comply with medication regimens.
- Contraindication to bronchoscopy on history or examination.
Healthy Control:
- History of chronic respiratory disease including asthma.
- Presence of significant medical illness or other chronic diseases whose treatment could affect the clinical features measured, responses to the therapies to be given in this study, or risks of participating in the study.
- History of atrial or ventricular tachyarrhythmia.
- Changes suggestive of cardiac ischemia on ECG at baseline.
- History of upper respiratory infection, sinusitis, bronchitis, or antibiotic use in the previous 3 months.
- Methacholine PC20 5 pack-years, or within the past year
- Use of > 10 doses of a nasal corticosteroid preparation in the previous 3 months
- FEV1 or FVC < 80% predicted.
- History of bleeding disorder.
- Reduced creatinine clearance.
- Contraindication to bronchoscopy on history or examination.
Data sourced from ClinicalTrials.gov (NCT01537133). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.