Asthma and chronic obstructive pulmonary disease (COPD) are inflammatory airway diseases. Although the clinical features of asthma and COPD may be similar, the pathogenesis of these diseases differs in many aspects.

The aim of this study is:

• to evaluate airway inflammation in asthma and COPD,
• to evaluate airway remodeling in asthma and COPD as compared to healthy subjects,
• to assess the relationship between markers of airway inflammation and airway remodeling in asthma and COPD patients.

Material and methods:

• mild to moderate asthma patients diagnosed in accordance with Global Initiative for Asthma (GINA) guidelines,
• mild to moderate COPD patients diagnosed in accordance with Global initiative for chronic Obstructive Lung Disease (GOLD) guidelines,
• healthy subjects as controls.

Airway inflammation is assessed in induced sputum (IS), exhaled breath condensate (EBC), bronchoalveolar lavage fluid (BALF) and specimens from endobronchial forceps biopsy. Airway wall thickness is evaluated in high resolution computed tomography (HRCT), endobronchial ultrasound (EBUS) and basement membrane thickness (BMT) in biopsy specimens.

We plan to compare airway inflammation and features of airway remodeling in asthma and COPD patients.

Inclusion Criteria:

• a clinical diagnosis of asthma or COPD in accordance with GINA or GOLD, respectively
• control group - healthy volunteers without any history of lung disease

Exclusion Criteria:

• age below 18 years
• exacerbation in the past 6 weeks
• inhaled corticosteroid therapy at least 6 weeks prior to study enrollment
• significant co-morbidities

patients with stable asthma and COPD invited to Clinical Hospital in Warsaw