Asthma Clinical Trial
Official title:
Ex Vivo Effect of Surfactant Protein D on Pulmonary Immune Cells Derived From Bronchoalveolar Lavage After Segmental Allergen Challenge in Patients With Asthma
The effect of surfactant protein D under native and altered conditions will be investigated in immune cells that are derived from bronchoalveolar lavage in patients with allergic asthma following segmental allergen challenge. The goal of this study is to elucidate the pro- versus anti-inflammatory function of SP-D molecules and to identify motifs of SP-D that have treatment potential in allergic asthma.
Following a baseline BAL, allergen (3×) and saline (1×) will be instilled into four different lung segments during a first bronchoscopy. After 24 hours during a second bronchoscopy BAL will be collected in these challenged segments to harvest invaded cells for in-vitro experimentation. In addition, bronchial biopsies and epithelial brushes will be taken to assess the degree of local inflammation in bronchial mucosa and to study the activation of airway epithelium following allergen challenge. ;
Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science
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