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Related Experiment Videos

Experimentally induced cerebral aneurysms in rats: VII. Scanning electron microscope study

I Nagata, H Handa, N Hasimoto

    Surgical Neurology
    |October 1, 1981
    PubMed
    Summary

    Scanning electron microscopy revealed gaps in endothelial cells and leukocyte adhesion in rat cerebral aneurysms. These changes, along with endothelial cell damage, occur at aneurysm sites and branching points.

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    Area of Science:

    • Cerebrovascular research
    • Pathology
    • Cell biology

    Background:

    • Cerebral aneurysms are vascular abnormalities.
    • Endothelial cell dysfunction is implicated in aneurysm development.
    • Leukocyte involvement in cerebrovascular diseases is recognized.

    Purpose of the Study:

    • To investigate the luminal surface changes in experimentally induced cerebral aneurysms.
    • To examine endothelial cell morphology at branching sites in the circle of Willis.
    • To explore the role of endothelial cells and leukocytes in aneurysm formation.

    Main Methods:

    • Scanning electron microscopy (SEM) was used to examine rat cerebral aneurysms.
    • The luminal surfaces of aneurysms and circle of Willis branching sites were analyzed.

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  • Endothelial cell junctions and morphology were assessed.

    • Main Results:

    • Gap formation at endothelial cell junctions was observed on aneurysm surfaces.
    • Leukocytes were frequently seen adhering to these endothelial gaps.
    • Endothelial cells showed regressive changes (protrusions, depressions) and disarray at branching sites.

    Conclusions:

    • Endothelial cell gaps and leukocyte adhesion are key features of cerebral aneurysms.
    • Changes in endothelial cell morphology at branching sites may predispose to aneurysm development.
    • Endothelial cells and leukocytes likely play significant roles in cerebral aneurysm pathogenesis.