Linked Life Data

9644219

Source:http://linkedlifedata.com/resource/pubmed/id/9644219

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1998-8-12
pubmed:abstractText
One of the hallmarks of apoptosis is cell shrinkage which appears to be important for cell death. The mechanisms mediating cell volume decrease have, however, not been addressed. Mechanisms employed by swollen cells to decrease their cell volume include activation of ion transport pathways, such as ion channels and KCl cotransport, and release of cellular osmolytes, such as taurine, sorbitol, betaine and inositol. The present study has been performed to test for release of taurine. To this end Jurkat human T-lymphocytes were loaded with [3H]taurine and apoptotic cell death induced by triggering the Fas(CD95) receptor with monoclonal crosslinking antibody. Triggering the Fas(CD95) receptor led to a release of 60+/-5% of cellular taurine within 90 min. The release did not occur prior to 45 min. The release coincided with cell shrinkage as evidenced from forward scatter in FACS analysis and preceeded DNA fragmentation according to propidium iodide staining. The delay of taurine release was not influenced by exchange of medium and thus was not due to extracellular accumulation of a stimulator. The Fas(CD95)-induced taurine release, cell shrinkage and DNA fragmentation were blunted by lowering of ambient temperature to 23 degreesC. Following pretreatment of cells with Fas(CD95) antibody at 23 degreesC rewarming led to rapid taurine release, cell shrinkage and DNA fragmentation, indicating that the temperature-sensitive step is distal to the mechanisms accounting for the delay. Osmotic cell swelling led to an immediate release of taurine. In conclusion, Fas(CD95) triggering leads to delayed taurine release through a temperature-sensitive mechanism.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0031-6768
pubmed:author
pubmed:issnType
Print
pubmed:volume
436
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
377-83
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Cellular taurine release triggered by stimulation of the Fas(CD95) receptor in Jurkat lymphocytes.
pubmed:affiliation
Physiologisches Institut, der Universität Tübingen, Gmelinstrasse 5, D-72076 Tübingen, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't