Related Experiment Video
Updated: Jul 23, 2026

Growing a Cystic Fibrosis-Relevant Polymicrobial Biofilm to Probe Community Phenotypes
Published on: April 19, 2024
Effects of claritromycin on inflammatory parameters and clinical conditions in children with bronchiectasis
1Chest Diseases Unit, Department of Pediatrics, Hacettepe University Faculty of Medicine, 06100-Ankara, Turkey. ebruy@hacettepe.edu.tr
Background:
The effects of the macrolides cannot be ascribed to their antibacterial action alone. Their immunoregulatory and anti-inflammatory functions are significant too. They are frequently used in the treatment of diffuse panbronchiolitis and cystic fibrosis (CF).
Aim:
To evaluate the effects of a macrolide antibiotic [clarithromycin (CAM)] on the process of inflammation [by measuring IL-8, TNF-alpha, IL-10 levels and cell profiles in bronchoalveolar lavage (BAL) fluid], pulmonary function and sputum production in children with steady-state bronchiectasis, secondary to causes other than CF or primary immunodeficiencies.
Methods:
Seventeen patients randomized to the treatment group received CAM and supportive therapies for 3 months and 17 patients in the control group were given supportive therapies only.
Results:
Compared with the control group, the treatment group showed a significant decrease in IL-8 levels, total cell count, neutrophil ratios in BAL fluid and daily sputum production at the end of the third month. There was also a significant increase in the treatment group's BAL fluid macrophage ratios. The differences in pulmonary function test parameters were not significant.
Conclusion:
Use of CAM in children with steady-state bronchiectasis results in laboratory improvement by reducing the inflammatory processes in the lungs. No corresponding clinical improvement could be shown but although this is possible with long-term use, trial validation is necessary.
Insights
Clarithromycin (CAM) reduced lung inflammation markers and sputum in children with bronchiectasis. While laboratory results improved, clinical benefits require further study for long-term efficacy.
Area of Science:
- Pediatric Pulmonology
- Pharmacology
- Immunology
Background:
- Macrolides possess significant immunoregulatory and anti-inflammatory properties beyond their antibacterial effects.
- Macrolides are commonly used for diffuse panbronchiolitis and cystic fibrosis (CF).
Purpose of the Study:
- To assess the impact of clarithromycin (CAM) on inflammation, pulmonary function, and sputum production in pediatric bronchiectasis.
- Investigate changes in bronchoalveolar lavage (BAL) fluid IL-8, TNF-alpha, IL-10, and cell profiles.
Main Methods:
- Seventeen pediatric patients with bronchiectasis received CAM and supportive care for 3 months.
- A control group of 17 patients received only supportive therapies.
- Evaluated BAL fluid inflammatory markers, cell counts, pulmonary function, and sputum production.
Main Results:
- CAM treatment significantly decreased IL-8 levels, total cell count, and neutrophil ratios in BAL fluid.
- A significant increase in BAL fluid macrophage ratios was observed in the CAM group.
- Daily sputum production was significantly reduced with CAM treatment.
- Pulmonary function test parameters did not show significant differences.
Conclusions:
- CAM effectively reduces inflammatory processes in pediatric bronchiectasis, as indicated by laboratory improvements.
- No significant short-term clinical improvement was observed.
- Long-term efficacy and clinical benefits of CAM require further investigation and validation.
Related Concept Videos
Drugs Used in Lower Respiratory Disorders: Overview
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...
Antiasthma Drugs: Leukotriene Modifiers
Leukotriene modifiers work through two distinct mechanisms:
COPD: Management Using Bronchodilators and Corticosteroids
Asthma I: Introduction
Asthma III: Clinical Manifestations
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features