A novel method for inducing focal ischemia in vitro

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DOIResolve DOI: http://doi.org/10.1016/j.jneumeth.2010.04.017
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TypeArticle
Journal titleJournal of Neuroscience Methods
Volume190
Issue1
Pages2027; # of pages: 8
SubjectStroke; Penumbra; Anoxic depolarization; Electrophysiology
AbstractCurrent in vitro models of stroke involve applying oxygen-glucose deprived (OGD) media over an entire brain slice or plate of cultured neurons. Thus, these models fail to mimic the focal nature of stroke as observed clinically and with in vivo rodent models of stroke. Our aim was to develop a novel in vitro brain slice model of stroke that would mimic focal ischemia and thus allow for the investigation of events occurring in the penumbra. This was accomplished by focally applying OGD medium to a small portion of a brain slice while bathing the remainder of the slice with normal oxygenated media. This technique produced a focal infarct on the brain slice that increased as a function of time. Electrophysiological recordings made within the flow of the OGD solution (“core”) revealed that neurons rapidly depolarized (anoxic depolarization; AD) in a manner similar to that observed in other stroke models. Edaravone, a known neuroprotectant, significantly delayed this onset of AD. Electrophysiological recordings made outside the flow of the OGD solution (“penumbra”) revealed that neurons within this region progressively depolarized throughout the 75 min of OGD application. Edaravone attenuated this depolarization and doubled neuronal survival. Finally, synaptic transmission in the penumbra was abolished within 50 min of focal OGD application. These results suggest that this in vitro model mimics events that occur during focal ischemia in vivo and can be used to determine the efficacy of therapeutics that target neuronal survival in the core and/or penumbra.
Publication date
LanguageEnglish
AffiliationNRC Institute for Nutrisciences and Health; National Research Council Canada
Peer reviewedYes
NPARC number16788143
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Record identifier15033957-de07-40e4-9d7e-285d426ce10b
Record created2011-02-02
Record modified2016-05-09
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