Effect of Macrolide Antibiotics on Airway Inflammation in People With Chronic Obstructive Pulmonary Disease (COPD)
Chronic obstructive pulmonary disease (COPD) is a chronic lung disease. Azithromycin, an antibiotic, may be beneficial at reducing the symptoms and severity of the disease. This study will analyze previously collected study data to evaluate the anti-inflammatory properties of azithromycin and determine how azithromycin affects the frequency and severity of COPD exacerbations.
|Study Design:||Observational Model: Cohort
Time Perspective: Retrospective
|Official Title:||Effect of Macrolide Treatment on a Novel Pathway of Neutrophilic Inflammation in COPD|
- Time to first COPD exacerbation [ Time Frame: Measured at Year 1 ] [ Designated as safety issue: No ]
- Alteration in levels of PGP and matrix metalloprotease (MMP) in blood and sputum [ Time Frame: Measured at Year 1 ] [ Designated as safety issue: No ]
Biospecimen Retention: Samples Without DNA
Serum and Plasma
|Study Start Date:||August 2007|
|Study Completion Date:||July 2012|
Participants in the COPD Network Macrolide Study who received azithromycin for 1 year.
250 mg daily
Participants in the COPD Network Macrolide Study who received placebo for 1 year.
COPD is a disease in which the lung airways are partly damaged and obstructed, making it difficult to breathe. The most common cause is cigarette smoking, but breathing in other types of lung irritants, including pollution, dust, and chemicals, over a long period of time may also contribute to COPD. It is the fourth leading cause of death in the United States. Symptoms include coughing, excess mucus production, shortness of breath, wheezing, and chest tightness.
Some bacterial infections may worsen COPD exacerbations. Current studies are examining if the macrolide antibiotic azithromycin may be beneficial at reducing the frequency and/or severity of COPD exacerbations. Azithromycin also has anti-inflammatory properties that may reduce the severity of COPD exacerbations by inhibiting the matrix metalloprotease (MMP)-catalyzed breakdown of collagen and the subsequent generation of PGP, a substance produced in response to collagen breakdown. An increase in PGP levels may indicate an increase in inflammation, which can worsen COPD symptoms. NHLBI's COPD Network Macrolide study includes people with COPD who were randomly assigned to receive either azithromycin or placebo for 1 year. For this current study, researchers will examine the Macrolide participants' previously collected blood samples, sputum samples, and study data, including information on COPD exacerbations and azithromycin effects. The purpose of this study is to examine the anti-inflammatory properties of azithromycin in people with COPD.
|United States, Alabama|
|University of Alabama at Birmingham|
|Birmingham, Alabama, United States, 35294|
|Principal Investigator:||James E. Blalock, PhD||University of Alabama at Birmingham|