Abstract
Brain microcirculation plays an important role in the pathogenesis of various brain diseases. Several specific features of the circulation in the brain and its functions deserve special attention. The brain is extremely sensitive to hypoxia, and brain edema is more dangerous than edema in other tissues. Brain vessels are part of the blood-brain barrier, which prevents the penetration of some of the substances in the blood into the brain tissue. Herein, we review the processes of angiogenesis and the changes that occur in the brain microcirculation in the most prevalent neurodegenerative diseases. There are no uniform vascular changes in the neurodegenerative diseases. In some cases, the vascular changes are secondary consequences of the pathological process, but they could also be involved in the pathogenesis of the primary disease and contribute to the degeneration of neurons, based on their quantitative characteristics. Additionally, we described the stereological methods that are most commonly used for generating qualitative and quantitative data to assess changes in the microvascular bed of the brain.
Acknowledgments
This review was supported by project ED2.1.00/03.0076 from the European Regional Development Fund and the Charles University Research Fund (project number P36).
Competing interests: The authors declare that they have no competing interests.
Author contributions: The first two authors performed the literature search and wrote the manuscript. The last three authors contributed equally to the generating ideas, general editing, and commenting on the text. The final manuscript preparation was conducted by the first author. All authors read and approved the final manuscript.
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