Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2000-10-27
pubmed:abstractText
The close relationship between neurodegeneration and gliosis could play a relevant role in propagating the degenerative event in the brain. Although there is evidence of the neurotoxicity of activated glia, the ability of damaged neurons to modulate glial response remains unexplored. Exposure of primary glial cells to damaged or dead hippocampal neurons was followed by glial release of tumor necrosis factor-alpha (TNF-alpha). This release was reduced by a partial prevention of neural death. By contrast, no TNF-alpha was released when glial cells were exposed to damaged murine fibroblasts. Exposure of glial cells to the cerebrospinal fluid (CSF) of patients with Alzheimer's disease was also followed by TNF-alpha release, while the CSF of subjects with nondegenerative brain disorders evoked no response. These data suggest that damaged neurons both in vitro and in vivo release factor(s) that activate glial response. Heat treatment of sonicated neurons or use of a mixture of protease inhibitors, among them the caspase inhibitors Z-DEVD-FMK and Z-YVAD-FMK, prevented TNF-alpha release from glial cells. We conclude that a primary neurodegenerative event may induce glial response by releasing a neurospecific protein factor via activation of a caspase.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0894-1491
pubmed:author
pubmed:copyrightInfo
Copyright 2000 Wiley-Liss, Inc.
pubmed:issnType
Print
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
84-90
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:10975913-Alzheimer Disease, pubmed-meshheading:10975913-Animals, pubmed-meshheading:10975913-Animals, Newborn, pubmed-meshheading:10975913-Biological Markers, pubmed-meshheading:10975913-Caspases, pubmed-meshheading:10975913-Cell Extracts, pubmed-meshheading:10975913-Cells, Cultured, pubmed-meshheading:10975913-Cerebrospinal Fluid Proteins, pubmed-meshheading:10975913-Endopeptidases, pubmed-meshheading:10975913-Gliosis, pubmed-meshheading:10975913-Hippocampus, pubmed-meshheading:10975913-Lipopolysaccharides, pubmed-meshheading:10975913-Nerve Degeneration, pubmed-meshheading:10975913-Neuroglia, pubmed-meshheading:10975913-Neurons, pubmed-meshheading:10975913-Protease Inhibitors, pubmed-meshheading:10975913-Rats, pubmed-meshheading:10975913-Rats, Sprague-Dawley, pubmed-meshheading:10975913-Tumor Necrosis Factor-alpha
pubmed:year
2000
pubmed:articleTitle
Dying neural cells activate glia through the release of a protease product.
pubmed:affiliation
Institute of Pharmacological Sciences, University of Milan, Milan, Italy. barbara.viviani@unimi.it
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't