Neutrophil Elastase Activity Is Associated with Exacerbations and Lung Function Decline in Bronchiectasis.

Area of Science:

• Pulmonology
• Biomarkers
• Respiratory Medicine

Background:

• Bronchiectasis is a chronic respiratory condition characterized by irreversible airway dilation.
• Neutrophil elastase and desmosine are potential biomarkers for disease severity and progression in bronchiectasis.

Purpose of the Study:

• To investigate the association between sputum neutrophil elastase activity and serum desmosine levels with exacerbations and lung function decline in bronchiectasis patients.
• To evaluate these biomarkers' utility in predicting disease severity and progression over a 3-year period.

Main Methods:

• A prospective cohort study involving 433 patients with confirmed bronchiectasis.
• Measurement of sputum neutrophil elastase activity and serum desmosine levels.
• Analysis of associations with clinical severity scores, exacerbation frequency, mortality, and lung function (FEV1) decline over 3 years.

Main Results:

• Sputum elastase activity strongly correlated with bronchiectasis severity index, dyspnea score, FEV1 decline, and radiological extent.
• Elevated elastase was linked to increased exacerbation frequency and predicted severe exacerbations and mortality.
• Desmosine correlated with elastase and predicted severe exacerbations but not lung function decline.

Conclusions:

• Sputum neutrophil elastase activity serves as a significant biomarker for disease severity and future risk in adults with bronchiectasis.
• These findings highlight the potential of elastase as a tool for monitoring disease progression and guiding treatment strategies.