asthma
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Signed informed consent must be obtained prior to participation in the study. 2. Male and female adult patients aged between 18 and 65 years old. 3. Patients with a diagnosis of asthma for at least 6 months prior to Visit 1 with current asthma severity of step 1-3 (GINA 2018). 4. Patients with presence of allergy against house dust mite, cat or grass pollen. 5. PC20 methacholine
Exclusion criteria
Exclusion criteria: 1. Patients who have a smoking history >= 10 pack-years (Note: 1 pack is equivalent to 20 cigarettes. 10 pack years = 1 pack/day x 10 years or * pack/day x 20 years). Ex-smokers are eligible for inclusion if they quit smoking for at least 6 months prior to Visit 1. 2. Patients diagnosed with Chronic Obstructive Pulmonary Disease (COPD). 3. Patients with severe airway obstruction at baseline, FEV1
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The primary endpoint is the reduction in the percentage of sputum eosinophils 24 hours after allergen challenge at the end of each treatment period vs. control allergen challenge. | — |
Secondary
| Measure | Time frame |
|---|---|
| Change from baseline after allergen challenge of: • Cell differential counts in blood and sputum 24 hours after allergen challenge. • Bronchial and alveolar nitric oxide. • Multiple Breath Nitrogen Washout (Lung Clearance Index (LCI), Scond, Sacin). • Lung function (FEV1, FEV1/FVC, FEF25, FEF50, FEF75, FEF25-75). • Body plethysmography (RV (% predicted), RV/TLC % predicted). • Impulse Oscillometry. Resistance (R5, R20, R5-20) and Reactance at 5 Hertz (IOS). • Genome-wide mRNA and miRNA expression in sputum and in epithelial cells derived from nasal epithelial brushes. | — |
Countries
Netherlands