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Pericyte Loss Leads to Capillary Stalling Through Increased Leukocyte-Endothelial Cell Interaction in the Brain

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Title
Pericyte Loss Leads to Capillary Stalling Through Increased Leukocyte-Endothelial Cell Interaction in the Brain
Author(s)
Choe, Young-Geun; Jin-Hui Yoon; Joo, Jongyoon; Kim, Bokyung; Seon Pyo Hong; Gou Young Koh; Lee, Dong-Seok; Oh, Wang-Yuhl; Jeong, Yong
Publication Date
2022-03
Journal
Frontiers in Cellular Neuroscience, v.16
Publisher
Frontiers Media S.A.
Abstract
Copyright © 2022 Choe, Yoon, Joo, Kim, Hong, Koh, Lee, Oh and Jeong.The neurovascular unit is a functional unit composed of neurons, glial cells, pericytes, and endothelial cells which sustain brain activity. While pericyte is a key component of the neurovascular unit, its role in cerebral blood flow regulation remains elusive. Recently, capillary stalling, which means the transient interruption of microcirculation in capillaries, has been shown to have an outsized impact on microcirculatory changes in several neurological diseases. In this study, we investigated capillary stalling and its possible causes, such as the cerebral endothelial glycocalyx and leukocyte adhesion molecules after depleting pericytes postnatally in mice. Moreover, we investigated hypoxia and gliosis as consequences of capillary stalling. Although there were no differences in the capillary structure and RBC flow, longitudinal optical coherence tomography angiography showed an increased number of stalled segments in capillaries after pericyte loss. Furthermore, the extent of the cerebral endothelial glycocalyx was decreased with increased expression of leukocyte adhesion molecules, suggesting enhanced interaction between leukocytes and endothelial cells. Finally, pericyte loss induced cerebral hypoxia and gliosis. Cumulatively, the results suggest that pericyte loss induces capillary stalling through increased interaction between leukocytes and endothelial cells in the brain.
URI
https://pr.ibs.re.kr/handle/8788114/11468
DOI
10.3389/fncel.2022.848764
ISSN
1662-5102
Appears in Collections:
Center for Vascular Research(혈관 연구단) > 1. Journal Papers (저널논문)
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