Calcium/calmodulin-dependent protein kinase-II (CamK-II) is a major neuronal protein which plays a significant role in the cellular process of long-term potentiation (LTP), and vesicular release of neurotransmitters. Here, we show that KN-62, 1-[N,O-bis(5- isoquinolinesulfonyl)-N-methyl-L-tyrosyl]-4- phenylpiperazine, a specific cell-permeable inhibitor of CamK-II substantially protected neurons from (1) acute NMDA toxicity and (2) hypoxia/hypoglycemia- induced neuronal injury in fetal rat cortical cultures. KN-62 did not directly inhibit glutamate, kainate, alpha-amino-3-hydroxy-5-methyl-4- isoxazolepropionate (AMPA), glycine, or [piperidyl-3,4-(N)]-(N-[1-(2- thienyl)cyclohexyl]-3,4-piperidine) (TCP) binding to rat brain membranes. Finally, KN-62 significantly reduced cellular calcium accumulation following either NMDA challenge or hypoxia/hypoglycemia insult. Our results show that CamK-II plays a key role in mediating some of the biochemical events leading to cell death following an acute excitotoxic insult.
A specific inhibitor of calcium/calmodulin-dependent protein kinase-II provides neuroprotection against NMDA- and hypoxia/hypoglycemia-induced cell death
I. Hajimohammadreza,A. Probert,L. Coughenour,SA Borosky,Frank W. Marcoux,P. Boxer,Kevin K. W. Wang
Published 1995 in Journal of Neuroscience
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- Publication year
1995
- Venue
Journal of Neuroscience
- Publication date
1995-05-01
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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