Mechanism(s)of Airflow Limitation in Moderate-severe Persistent Asthma
Public ClinicalTrials.gov record NCT00576069. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Evaluation of Mechanism(s)Limiting Expiratory Airflow in Chronic, Stable Asthmatics Who Are Non-smokers
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The purpose of this study is to evaluate the site and mechanisms responsible for expiratory airflow limitation in chronic, treated, non-smoking, stable asthmatics with moderate to severe persistent expiratory airflow obstruction. Treatment will include inhaled corticosteroids and long acting beta2agonists and long acting muscarinic antagonists. We are interested in determining whether the large and/or small airways are the predominant site of airflow limitation. We are also interested in determining whether intrinsic small airways obstruction and/or loss of lung elastic recoil is responsible for expiratory airflow limitation and to what extent may be attributed to loss of lung elastic recoil vs decreased airway conductance in peripheral airways. We are also interested to evaluate the role of varying doses of inhaled corticosteroids to suppress large and small airway inflammation using exhaled nitric oxide as surrogate markers of inflammation. For comparison purposes, spirometry and measurements of exhaled nitric oxide will also be obtained if possible during a naturally occurring exacerbation of asthma. High resolution thin section CT of the lung will also be obtained. Analysis will evaluate integrity of the lung parenchyma as to absence and or presence of emphysema and extent of emphysema using voxel quantification. We will also investigate optical coherence tomography to detect clinically unsuspected emphysema. We will also obtain autopsy material when available in asthmatics who expire. Will also measure serum periostin as a marker of inflammation by collaborating with Genetech in San Francisco.
Study identification
- NCT ID
- NCT00576069
- Recruitment status
- Recruiting
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 60 participants
Conditions and interventions
Conditions
Interventions
- budesonide/formoterol Drug
- fluticasone/salmeterol Drug
- mometasone/formoterol Drug
- Prednisone Drug
Drug
Eligibility (public fields only)
- Age range
- 10 Years to 95 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Oct 24, 2007
- Primary completion
- May 31, 2027
- Completion
- May 31, 2027
- Last update posted
- Oct 25, 2023
2007 – 2027
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Arthur F Gelb Medical Corporation | Lakewood | California | 90712 | Recruiting |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00576069, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Oct 25, 2023 · Synced Sep 7, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00576069 live on ClinicalTrials.gov.