Cardiac Arrest Induces Ischemic Long-Term Potentiation of Hippocampal CA1 Neurons That Occludes Physiological Long-Term Potentiation
Joint Authors
Orfila, James E.
McKinnon, Nicole
Moreno, Myriam
Deng, Guiying
Chalmers, Nicholas
Dietz, Robert M.
Herson, Paco S.
Quillinan, Nidia
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-04-26
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Ischemic long-term potentiation (iLTP) is a form of synaptic plasticity that occurs in acute brain slices following oxygen-glucose deprivation.
In vitro, iLTP can occlude physiological LTP (pLTP) through saturation of plasticity mechanisms.
We used our murine cardiac arrest and cardiopulmonary resuscitation (CA/CPR) model to produce global brain ischemia and assess whether iLTP is induced in vivo, contributing to the functionally relevant impairment of pLTP.
Adult male mice were subjected to CA/CPR, and slice electrophysiology was performed in the hippocampal CA1 region 7 or 30 days later.
We observed increased miniature excitatory postsynaptic current amplitudes, suggesting a potentiation of postsynaptic AMPA receptor function after CA/CPR.
We also observed increased phosphorylated GluR1 in the postsynaptic density of hippocampi after CA/CPR.
These data support the in vivo induction of ischemia-induced plasticity.
Application of a low-frequency stimulus (LFS) to CA1 inputs reduced excitatory postsynaptic potentials in slices from mice subjected to CA/CPR, while having no effects in sham controls.
These results are consistent with a reversal, or depotentiation, of iLTP.
Further, depotentiation with LFS partially restored induction of pLTP with theta burst stimulation.
These data provide evidence for iLTP following in vivo ischemia, which occludes pLTP and likely contributes to network disruptions that underlie memory impairments.
American Psychological Association (APA)
Orfila, James E.& McKinnon, Nicole& Moreno, Myriam& Deng, Guiying& Chalmers, Nicholas& Dietz, Robert M.…[et al.]. 2018. Cardiac Arrest Induces Ischemic Long-Term Potentiation of Hippocampal CA1 Neurons That Occludes Physiological Long-Term Potentiation. Neural Plasticity،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1210512
Modern Language Association (MLA)
Orfila, James E.…[et al.]. Cardiac Arrest Induces Ischemic Long-Term Potentiation of Hippocampal CA1 Neurons That Occludes Physiological Long-Term Potentiation. Neural Plasticity No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1210512
American Medical Association (AMA)
Orfila, James E.& McKinnon, Nicole& Moreno, Myriam& Deng, Guiying& Chalmers, Nicholas& Dietz, Robert M.…[et al.]. Cardiac Arrest Induces Ischemic Long-Term Potentiation of Hippocampal CA1 Neurons That Occludes Physiological Long-Term Potentiation. Neural Plasticity. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1210512
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1210512