[Vacuole formation and endothelial damage in microvessels after ischemia reperfusion]
Aim:
Damage of endothelial cells and adhesion of leukocytes and platelets were studied in rat mesentery microvessels after ischemia reperfusion.
Methods:
The model was made by losing blood and reperfusion from carotid artery in rat. Changes of mesentery microvessels were observed by high magnify microscope.
Results:
Leukocytes and platelets adhesions were found in venules and co capillaries 1-3 hours after ischemia reperfusion. Endothelial cells were edema and vascular walls were thickening. Vacuoles formed in intracytoplasm of some vascular endothelium and some bigger endothelial vacuoles prominence toward the luminal surface. Vacuoles liked circle shape and the diameter was 10-30 microm. More vacuoles were found in arterioles, even there were several vacuoles in a arteriole. The biggest vacuole almost occupied 2/3 of vascular lumen.
Conclusion:
Edema and vacuole formation in vascular endothelium indicate that endothelial cells are injured seriously after ischemia reperfusion.
Insights
Ischemia reperfusion in rat mesentery microvessels causes endothelial cell edema and vacuole formation. Leukocyte and platelet adhesion also occurs, indicating serious vascular injury.
Area of Science:
- Physiology
- Pathology
- Microcirculation
Context:
- Ischemia reperfusion injury is a significant clinical concern.
- Understanding microvascular changes is crucial for developing therapeutic strategies.
Purpose:
- To investigate endothelial cell damage and the adhesion of leukocytes and platelets in rat mesentery microvessels following ischemia reperfusion.
- To characterize the morphological changes in microvessels post-reperfusion.
Summary:
- Rat mesentery microvessels were subjected to ischemia followed by reperfusion.
- Microscopic observation revealed leukocyte and platelet adhesion in venules and capillaries within 1-3 hours.
- Endothelial cells exhibited edema, vascular wall thickening, and intracytoplasmic vacuole formation, particularly prominent in arterioles.
Impact:
- The findings demonstrate significant endothelial cell injury, evidenced by edema and vacuole formation, following ischemia reperfusion.
- These cellular changes highlight the vulnerability of microvasculature to ischemic events.
- The study provides insights into the early cellular mechanisms of ischemia reperfusion injury in microvessels.
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