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Subfield-specific neurovascular remodeling in the entorhino-hippocampal-organotypic slice culture as a response to oxygen–glucose deprivation and excitotoxic cell death

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Subfield-specific neurovascular remodeling in the entorhino-hippocampal-organotypic slice culture as a response to oxygen–glucose deprivation and excitotoxic cell death

Content Provider	PubMed Central
Author	Chip, Sophorn Nitsch, Cordula Wellmann, Sven Kapfhammer, Josef P.
Copyright Year	2013
Abstract	Transient ischemia causes delayed neurodegeneration in selective brain areas, particularly in the CA1 field of the hippocampus. This is accompanied by neurovascular impairment. It is unknown whether neurodegeneration is the cause or consequence of vascular changes. In an entorhino-hippocampal-organotypic slice culture system with well-preserved blood vessels, we studied the interplay between neurodegeneration and neurovasculature. Short-term oxygen and glucose deprivation (OGD) resulted in upregulation of hypoxic markers and with a delay of 24 to 48 hours in selective nerve cell death in CA1. In parallel, local vessel density decreased as detected by markers of endothelial cells and of the extracellular matrix. Claudin-5, a tight junction protein and marker of the blood–brain barrier was reduced. Preventing neuronal death with tetrodotoxin or 6-cyano-7-nitroquinoxaline-2,3-dione rescued blood vessels, suggesting that vessel loss is not due to OGD per se but a consequence of neuronal death. Induction of excitotoxic neuronal death with AMPA caused widespread neurodegeneration, but vessel reduction was confined to CA1. In dentate gyrus without neuronal loss, vessel density increased. We propose that neuronal stress and death influence maintenance, loss and remodeling of the neurovasculature and that the type of vascular response is in addition determined by local factors within the hippocampus.
Related Links	http://dx.doi.org/10.1038/jcbfm.2012.190
Ending Page	518
Page Count	11
Starting Page	508
File Format	PDF
ISSN	0271678X
e-ISSN	15597016
Journal	Journal of Cerebral Blood Flow & Metabolism
Issue Number	4
Volume Number	33
Language	English
Publisher	Nature Publishing Group
Publisher Date	2013-04-01
Access Restriction	Open
Rights Holder	Nature Publishing Group
Subject Keyword	Neurology Clinical Neurology Cardiology and Cardiovascular Medicine Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Neurology Neurology (clinical) Cardiology and Cardiovascular Medicine

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