Linked Life Data

12213303

Source:http://linkedlifedata.com/resource/pubmed/id/12213303

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2002-9-5
pubmed:abstractText
Experimental traumatic brain injury (TBI) results in a rapid and significant necrosis of cortical tissue at the site of injury. In the ensuing hours and days, secondary injury exacerbates the primary damage resulting in significant neurological dysfunction. The identification of cell death pathways that mediate this secondary traumatic injury have not been elucidated, however recent studies have implicated a role for apoptosis in the neuropathology of traumatic brain injury. The present study utilized a controlled cortical impact model of brain injury to assess the involvement of apoptotic pathways: release of cytochrome c from mitochondria and the activation of caspase-1- and caspase-3-like proteases in the injured cortex at 6, 12 and 24 h post-injury. Collectively, these results demonstrate cytochrome c release from mitochondria and its redistribution into the cytosol occurs in a time-dependent manner following TBI. The release of cytochrome c is accompanied by a time-dependent increase in caspase-3-like protease activity with no apparent increase in caspase-1-like activity. However, pretreatment with a general caspase inhibitor had no significant effect on the amount of cortical damage observed at 7 days post-injury. Our data suggest that several pro-apoptotic events occur following TBI, however the translocation of cytochrome c itself and/or other events upstream of caspase activation/inhibition may be sufficient to induce neuronal cell death.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0006-8993
pubmed:author
pubmed:copyrightInfo
Copyright 2002 Elsevier Science B.V.
pubmed:issnType
Print
pubmed:day
13
pubmed:volume
949
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
88-96
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Cytochrome c release and caspase activation after traumatic brain injury.
pubmed:affiliation
229 Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40536-0230, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't