Linked Life Data

20201108

Source:http://linkedlifedata.com/resource/pubmed/id/20201108

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2010-10-27
pubmed:abstractText
Mitochondrial fragmentation is recognized to be an important event during the onset of apoptosis. In this current study, we have used single cell imaging to investigate the role of the mitochondrial fission protein DRP-1 on mitochondrial morphology and mitochondrial fragmentation in primary hippocampal neurons undergoing necrotic or apoptotic cell death. Treatment of neurons with 500 nM staurosporine (apoptosis) or 30 ?M glutamate (l-Glu; excitotoxic necrosis) produced a fragmentation and condensation of mitochondria, which although occurred over markedly different time frames appeared broadly similar in appearance. In neurons exposed to an apoptotic stimuli, inhibiting DRP-1 activity using overexpression of the dominant negative DRP-1(K38A) slowed the rate of mitochondrial fragmentation and decreased total cell death when compared to overexpression of wild-type DRP-1. In contrast, responses to l-Glu appeared DRP-1 independent. Similarly, alterations in the fission/fusion state of the mitochondrial network did not alter mitochondrial Ca(2+) uptake or the ability of l-Glu to stimulate excitotoxic Ca(2+) overload. Finally, apoptosis-induced mitochondrial fragmentation was observed concurrent with recruitment of Bax to the mitochondrial membrane. In contrast, during glutamate excitotoxicity, Bax remained in the cytosolic compartment. We conclude that different pathways lead to the appearance of fragmented mitochondria during necrotic and apoptotic neuronal cell death.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1099-0461
pubmed:author
pubmed:copyrightInfo
Copyright 2010 Wiley Periodicals, Inc.
pubmed:issnType
Electronic
pubmed:volume
24
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
335-41
pubmed:dateRevised
2011-3-18
pubmed:meshHeading
pubmed:articleTitle
Different pathways lead to mitochondrial fragmentation during apoptotic and excitotoxic cell death in primary neurons.
pubmed:affiliation
MRC Toxicology Unit, University of Leicester, Leicester, LE1 9HN, UK. kwy1@le.ac.uk
pubmed:publicationType
Journal Article, Comparative Study