Related Experiment Videos
[Trypsin-induced leukostasis: granulocyte migration in airspaces]
E Reichart1, H Gérard, P Boerkmann
1INSERM U. 14, physiopathologie respiratoire, Vandoeuvre-lès-Nancy, France.
Summary
Trypsin injection causes lung emphysema by increasing granulocytes in airspaces. Neutrophils migrate into lung tissues, contributing to emphysema development.
Area of Science:
- Pulmonary Medicine
- Cell Biology
- Pathology
Context:
- Emphysema is traditionally linked to elastase activity.
- Trypsin injection models delayed lung emphysema.
- Granulocyte sequestration in lung microvessels is observed during acute phases.
Purpose:
- To investigate granulocyte migration into lung airspaces during trypsin-induced vascular leucostasis.
- To quantify airspace-invading granulocytes in cats following trypsin administration.
Summary:
- Cats were used to study trypsin-induced emphysema due to their propensity for leucocytosis.
- Lung lavages were performed under normal and trypsin-treated conditions, including kinetic and post-administration assessments.
- Results showed a transient increase in granulocytes, particularly neutrophils, within lung airspaces, constituting approximately 20% of total lung granulocytes.
Impact:
- This study elucidates the role of granulocytes, specifically neutrophils, in the pathogenesis of trypsin-induced emphysema.
- Provides insights into the cellular mechanisms underlying lung tissue damage and emphysema development.
- Highlights the significance of granulocyte extravasation and migration in respiratory disease models.