Linked Life Data

9872940

Source:http://linkedlifedata.com/resource/pubmed/id/9872940

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1999-2-11
pubmed:abstractText
When cultured hepatocytes were incubated in cell culture medium at 4 degreesC for up to 30 h and then returned to 37 degreesC, blebbing of the plasma membrane, cell detachment, chromatin condensation and margination, enhanced nuclear stainability with Hoechst 33342, ruffling of the nuclear membrane, and DNA fragmentation occurred. Similar to hepatocytes, cultured liver endothelial cells exhibited blebbing, chromatin condensation and margination, marked nuclear condensation, and increased stainability with Hoechst 33342 when exposed to hypothermia/rewarming. In both cell types, the occurrence and extent of these alterations were dependent on the duration of the cold incubation period. This cold-induced apoptosis was inhibited by hypoxia, by an array of free radical scavengers/antioxidants, and by iron chelators. However, the extent of the protection by the different antioxidants was different in the two cell types: iron chelators provided complete protection in liver endothelial cells but only partial protection in hepatocytes, whereas lipophilic antioxidants such as alpha-tocopherol provided complete protection in both cell types. During cold incubation, and especially during rewarming, lipid peroxidation occurred. These results suggest that the formation of reactive oxygen species (ROS) is a key mediator of cold-induced apoptosis, with ROS formation being completely iron-mediated in liver endothelial cells and partially iron-mediated in hepatocytes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0892-6638
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
155-68
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Cold-induced apoptosis in cultured hepatocytes and liver endothelial cells: mediation by reactive oxygen species.
pubmed:affiliation
Institut für Physiologische Chemie, Universitätsklinikum, D-45122 Essen, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't