Linked Life Data

1786210

Source:http://linkedlifedata.com/resource/pubmed/id/1786210

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1992-3-20
pubmed:abstractText
Human neutrophils pre-incubated with granulocyte-macrophage-colony-stimulating factor (GM-CSF) exhibit an enhanced mobilization of calcium in response to secondary stimuli such as chemotactic factors. The mechanisms underlying this priming effect of GM-CSF were examined. It was first demonstrated that the additional calcium mobilized by chemotactic factors in GM-CSF-treated cells was derived from intracellular stores and was associated neither with an increased permeability to calcium nor with production of inositol 1,4,5-trisphosphate. These results indicated that GM-CSF called upon a novel mechanism in order to enhance the mobilization of calcium in human neutrophils. The growth factor has recently been shown to prime phospholipase D leading to an enhanced activation by chemotactic factors and an augmented production of phosphatidic acid. Furthermore the ability of exogenous phosphatidic acid to mobilize calcium in cell types other than neutrophils has been previously demonstrated. Therefore, we examined the potential involvement of phospholipase D in the priming of the calcium response by GM-CSF in human neutrophils. Inhibition of the production of the fMet-Leu-Phe-stimulated production of phosphatidic acid by ethanol or wortmannin had only marginal effects on the concurrent mobilization of calcium. However, the priming of the mobilization of calcium by GM-CSF was greatly decreased in cells treated with either ethanol or wortmannin. These results provide strong support for the hypothesis that the production of phosphatidic acid, which is enhanced in GM-CSF-treated cells, is linked to an increased mobilization of intracellular calcium. These results may have relevance to the mechanism of action of GM-CSF in mature haematopoeitic cells as well to the mitogenic activity of other growth factors.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0898-6568
pubmed:author
pubmed:issnType
Print
pubmed:volume
3
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
635-44
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Priming of calcium mobilization in human neutrophils by granulocyte-macrophage colony-stimulating factor: evidence for an involvement of phospholipase D-derived phosphatidic acid.
pubmed:affiliation
Centre de recherche en inflammation, immunologie et rhumatologie, Centre de recherche du CHUL, Ste Foy, Québec, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't