Effect of an Immunotoxin on Activated Human Macrophages in Those With Allergic Rhinitis or Mild Intermittent Asthma
The primary objective of this study is to isolate macrophages by using bronchoalveolar lavage (BAL) for different in vitro experiments.
Therefore, following a baseline BAL, allergen, endotoxin, and saline will be instilled into three different lung segments during the first bronchoscopy. After 24 hours during a second bronchoscopy, BAL fluid will be collected in these challenged segments to harvest invaded cells for in vitro experimentation. In addition, segmental bronchial biopsies will be taken to assess the degree of local inflammation.
|Atopy Rhinitis Bronchial Asthma||Procedure: bronchoscopy, allergen/endotoxin instillation|
|Study Design:||Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
|Official Title:||05/04 IMHOTEP-1 FHG: Ex Vivo Effect of an Immunotoxin on Activated Human Macrophages From Atopics After Segmental Instillation of Allergen and Endotoxin|
- number of macrophages in bronchoalveolar lavage [ Time Frame: one day after challenge ]
- number of other BAL cells [ Time Frame: one day after challenge ]
|Study Start Date:||February 2006|
|Study Completion Date:||January 2008|
|Primary Completion Date:||January 2008 (Final data collection date for primary outcome measure)|
Please refer to this study by its ClinicalTrials.gov identifier: NCT00295737
|Hannover, Germany, 30625|
|Principal Investigator:||Jens Hohlfeld, MD||Fraunhofer ITEM|