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Distribution of Neuroglobin in Pericytes is Associated with Blood-Brain Barrier Leakage against Cerebral Ischemia in Miceopen access

Authors
김여진Kim Mingee김소담Naeun YoonWang XiaoyingBae Gyu-Un송윤선
Issue Date
Oct-2022
Publisher
한국뇌신경과학회
Keywords
Neuroglobin; Pericytes; Ischemic stroke; Blood-brain barrier
Citation
Experimental Neurobiology, v.31, no.5, pp 289 - 298
Pages
10
Journal Title
Experimental Neurobiology
Volume
31
Number
5
Start Page
289
End Page
298
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/152362
DOI
10.5607/en22001
ISSN
1226-2560
2093-8144
Abstract
With emerging data on the various functions of neuroglobin (Ngb), such as neuroprotection and neurogenesis, we investigated the role of Ngb in the neurovascular unit (NVU) of the brain. To study the distribution and function of Ngb after cerebral ischemia, transient middle cerebral artery occlusion (tMCAO) was performed in mice. Brain immunostaining and fluorescence-activated cell sorting were used to analyze the role of Ngb according to the location and cell type. In normal brain tissue, it was observed that Ngb was distributed not only in neurons but also around the brain’s blood vessels. Interestingly, Ngb was largely expressed in platelet-derived growth factor receptor β (PDGFRβ)-positive pericytes in the NVU. After tMCAO, Ngb levels were significantly decreased in the core of the infarct, and Ngb and PDGFRβ-positive pericytes were detached from the vasculature. In contrast, in the penumbra of the infarct, PDGFRβ-positive pericytes expressing Ngb were increased compared with that in the core of the infarct. Moreover, the cerebral blood vessels, which have Ngb-positive PDGFRβ pericytes, showed reduced blood-brain barrier (BBB) leakage after tMCAO. It showed that Ngb-positive PDGFRβ pericytes stayed around the endothelial cells and reduced the BBB leakage in the NVU. Our results indicate that Ngb may play a role in attenuating BBB leakage in part by its association with PDGFRβ. In this study, the distribution and function of Ngb in the pericytes of the cerebrovascular system have been elucidated, which contributes to the treatment of stroke through a new function of Ngb.
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