Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2001-12-17
pubmed:abstractText
Chronic treatment of rat cortical slices with a relative low concentration of mitochondrial inhibitor malonate leads to cortical motoneuron (CMN) death. In the neurodegenerative disease amyotrophic lateral sclerosis (ALS) corticospinal neurons, CMNs projecting to the spinal cord, degenerate. In the present study we compared the effect of chronic mitochondrial inhibition on the survival of CMNs located in the dorsal cortical areas (including corticospinal neurons) with that on ventrally located CMNs (non-corticospinal neurons) in vitro. In the explant culture model used, the dorsally located CMNs were less vulnerable to a 2-week period of mitochondrial inhibition with malonate as compared to ventrally located CMNs. Treatment with 5 mM malonate resulted in 50% surviving CMNs in the dorsal part and only 16% in the ventral part. Neuroprotection of the CMNs could be achieved with co-administration of the non-NMDA antagonist CNQX, the NMDA antagonist MK-801, or the glutamate release inhibitor riluzole, suggesting that chronic energy shortage leads to excitotoxicity. In the dorsal cortical areas CNQX, MK-801, and riluzole had a neuroprotective effect on the CMNs, whereas in the ventral cortical areas only MK-801 was neuroprotective. The sensitivity to energy depletion and consequently excitotoxicity may be related to glutamate receptor density and subunit composition in various cortical areas, but also to the projection length and input of CMNs in vivo. The present investigation gives insight in mechanisms leading to excitotoxic cell death of CMNs and may therefore be important for the development of treatment strategies in protection and survival of cortical motoneurons in ALS.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0006-8993
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
922
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
243-9
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed-meshheading:11743956-6-Cyano-7-nitroquinoxaline-2,3-dione, pubmed-meshheading:11743956-Amyotrophic Lateral Sclerosis, pubmed-meshheading:11743956-Animals, pubmed-meshheading:11743956-Animals, Newborn, pubmed-meshheading:11743956-Cell Death, pubmed-meshheading:11743956-Cell Survival, pubmed-meshheading:11743956-Cerebral Cortex, pubmed-meshheading:11743956-Dizocilpine Maleate, pubmed-meshheading:11743956-Dose-Response Relationship, Drug, pubmed-meshheading:11743956-Drug Interactions, pubmed-meshheading:11743956-Energy Metabolism, pubmed-meshheading:11743956-Excitatory Amino Acid Antagonists, pubmed-meshheading:11743956-Glutamic Acid, pubmed-meshheading:11743956-Immunohistochemistry, pubmed-meshheading:11743956-Malonates, pubmed-meshheading:11743956-Mitochondria, pubmed-meshheading:11743956-Motor Neurons, pubmed-meshheading:11743956-Neurofilament Proteins, pubmed-meshheading:11743956-Neuroprotective Agents, pubmed-meshheading:11743956-Organ Culture Techniques, pubmed-meshheading:11743956-Pyramidal Tracts, pubmed-meshheading:11743956-Rats, pubmed-meshheading:11743956-Rats, Wistar, pubmed-meshheading:11743956-Receptors, Glutamate
pubmed:year
2001
pubmed:articleTitle
Differential cortico-motoneuron vulnerability after chronic mitochondrial inhibition in vitro and the role of glutamate receptors.
pubmed:affiliation
Department of Experimental Neurology, Room G02.320, RMI for Neurosciences, UMC Utrecht, P.O. Box 85500, 3508 GA, Utrecht, The Netherlands. m.g.h.vanwesterlaak@neuro.azu.nl
pubmed:publicationType
Journal Article