Real-time Imaging of an Experimental Intracranial Aneurysm in Rats

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Author(s)

    • MIYATA Haruka
    • Department of Molecular Pharmacology, Research Institute, National Cerebral and Cardiovascular Center|Department of Neurosurgery, Shiga University of Medical Science|Core Research for Evolutional Science and Technology (CREST) from Japan Agency for Medical Research and Development (AMED), National Cerebral and Cardiovascular Center
    • SHIMIZU Kampei
    • Department of Molecular Pharmacology, Research Institute, National Cerebral and Cardiovascular Center|Department of Neurosurgery, Kyoto University Graduate School of Medicine
    • KOSEKI Hirokazu
    • Department of Molecular Pharmacology, Research Institute, National Cerebral and Cardiovascular Center|Core Research for Evolutional Science and Technology (CREST) from Japan Agency for Medical Research and Development (AMED), National Cerebral and Cardiovascular Center|Department of Neurosurgery, Tokyo Women's Medical University Medical Center East
    • ABEKURA Yu
    • Department of Molecular Pharmacology, Research Institute, National Cerebral and Cardiovascular Center|Department of Neurosurgery, Kyoto University Graduate School of Medicine
    • KATAOKA Hiroharu
    • Department of Neurosurgery, Kyoto University Graduate School of Medicine
    • MIYAMOTO Susumu
    • Department of Neurosurgery, Kyoto University Graduate School of Medicine
    • NARUMIYA Shuh
    • Alliance Laboratory for Advanced Medical Research, Medical Innovation Center, Kyoto University Graduate School of Medicine
    • AOKI Tomohiro
    • Department of Molecular Pharmacology, Research Institute, National Cerebral and Cardiovascular Center|Core Research for Evolutional Science and Technology (CREST) from Japan Agency for Medical Research and Development (AMED), National Cerebral and Cardiovascular Center|Alliance Laboratory for Advanced Medical Research, Medical Innovation Center, Kyoto University Graduate School of Medicine

Abstract

<p>Subarachnoid hemorrhage due to rupture of a pre-existing intracranial aneurysm has quite a poor outcome in spite of intensive medical care. Hemodynamic stress loaded on intracranial arterial walls is considered as a trigger and a regulator of formation and progression of the disease, but how intracranial arterial walls or intracranial aneurysm walls behave under hemodynamic stress loading remains unclear. The purpose of this study was to visualize and analyze the wall motion of intracranial aneurysms to detect a pathological flow condition. We subjected a transgenic rat line, in which endothelial cells are specifically visualized by expression of a green fluorescent protein, to an intracranial aneurysm model and observed a real-time motion of intracranial arterial walls or intracranial aneurysm walls by a multiphoton laser confocal microscopy. The anterior cerebral artery–olfactory artery bifurcation was surgically exposed for the monitoring. First, we observed the proper flow-dependent physiological dilatation of a contralateral intracranial artery in response to increase of blood flow by one side of carotid ligation. Next, we observed intracranial aneurysm lesions induced in a rat model and confirmed that a wall motion of the dome was static, whereas that of the neck was more dynamic in response to pulsation of blood flow. We successfully monitored a real-time motion of intracranial aneurysm walls. Findings obtained from such a real-time imaging will provide us many insights especially about the correlation of mechanical force and the pathogenesis of the disease and greatly promote our understanding of the disease.</p>

Journal

  • Neurologia medico-chirurgica

    Neurologia medico-chirurgica 59(1), 19-26, 2019

    The Japan Neurosurgical Society

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