Related Experiment Videos
[Expression of adhesion molecules in bronchial asthma]
1First Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan.
Nihon Kyobu Shikkan Gakkai Zasshi
|December 1, 1993
Summary
Understanding eosinophil infiltration in asthma is key. This study reveals that interactions between ICAM-1/Mac-1, LFA-1, and VCAM-1/VLA-4 are crucial for eosinophils entering airways during allergic reactions.
Area of Science:
- Immunology
- Respiratory Medicine
- Cell Biology
Context:
- Eosinophilic airway infiltration is central to late asthmatic responses.
- Precise mechanisms of eosinophil recruitment are vital for effective bronchial asthma treatment.
Purpose:
- To investigate the specific adhesion molecules involved in selective eosinophil infiltration into the airways.
- To elucidate the molecular interactions driving eosinophil migration in asthma.
Summary:
- Immunohistochemistry, immuno-electron microscopy, and in situ hybridization were used to analyze adhesion molecule expression.
- Asthmatic sputum and blood eosinophils showed strong Mac-1 expression, with LFA-1, VLA-4, and sLe-X also present.
- Bronchial submucosa tissues revealed ICAM-1 on endothelial cells and epithelium, VCAM-1 on endothelial cells, and weak ELAM-1.
- Infiltrated eosinophils expressed Mac-1, LFA-1, and VLA-4, with weak sLe-X detection.
Impact:
- Findings suggest ICAM-1/Mac-1 or LFA-1, and VCAM-1/VLA-4 interactions are primary drivers of eosinophil airway infiltration in asthma.
- ELAM-1 and sLe-X appear less critical in this specific allergic context.
- This research provides insights into potential therapeutic targets for managing eosinophilic asthma.