Related Experiment Videos
Permeability of the post-ischemic rat aorta
Acta Morphologica Academiae Scientiarum Hungaricae
|January 1, 1975
Summary
Acute hypoxia causes a temporary vascular permeability disorder in rat aortas. Plasma substances infiltrate the vessel wall, peaking at 24-48 hours, with the endothelium acting as the primary barrier.
Area of Science:
- Vascular Biology
- Pathophysiology
- Histochemistry
Background:
- Acute hypoxia can induce vascular permeability disorders.
- Understanding plasma substance entry into the vessel wall is crucial for vascular health.
Purpose of the Study:
- To investigate the time course of vascular permeability disorder after acute hypoxia.
- To determine the fate of plasma substances entering the vessel wall.
Main Methods:
- Rat abdominal aorta subjected to one hour of hypoxia and varying recirculation periods (1 hour to 30 days).
- Histochemical staining using colloidal iron tracer and Prussian blue reaction.
- Photometric analysis to quantify plasma imbibition.
Main Results:
- Plasma imbibition in the vessel wall peaked between 24 to 48 hours post-hypoxia.
- By 10 days, plasma imbibition levels nearly returned to normal.
- Endothelium served as the primary barrier; elastic lamellae offered only temporary resistance.
Conclusions:
- The vascular permeability disorder induced by hypoxia is transient.
- The endothelium's integrity is critical in preventing plasma substance ingress.
- Elastic lamellae provide a limited mechanical barrier against plasma infiltration during permeability disorders.