Linked Life Data

7836470

Source:http://linkedlifedata.com/resource/pubmed/id/7836470

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1995-3-2
pubmed:abstractText
Basic fibroblast growth factor (FGF) stimulates the proliferation, differentiation, and motility of multiple cell types. Signal transduction by FGF is mediated by high affinity FGF receptors that have autophosphorylating tyrosine kinase activity and also elicit the release of low molecular weight signaling molecules, including inositol 1,4,5-trisphosphate, diacylglycerol, and arachidonate. We have shown previously that basic FGF-stimulated, phospholipase A2 (PLA2)-mediated arachidonate release regulates endothelial cell (EC) motility (Sa, G., and Fox, P.L. (1994) J. Biol. Chem. 269, 3219-3225). Here we identify the phospholipase responsible for basic FGF-mediated arachidonate release as cytosolic PLA2 (cPLA2) by demonstrating in EC lysates a requirement for micromolar Ca2+, dithiothreitol insensitivity, and inactivation by anti-cPLA2 antiserum. The role of cPLA2 is also indicated by the observed mechanisms of activation which show a requirement for p42 mitogen-activated protein kinase activity, cPLA2 phosphorylation, and cPLA2 translocation from cytosol to membranes. Phosphorylation of cPLA2, arachidonate release from prelabeled intact cells, and cell motility all have similar concentration dependencies on basic FGF. Since arachidonate release is required for basic FGF-stimulated motility of EC, our results show that p42 mitogen-activated protein kinase activation of cPLA2 may be a regulatory event in stimulation of cellular release of this important eicosanoid precursor during cellular responses to basic FGF.
pubmed:grant
pubmed:keyword
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
3
pubmed:volume
270
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2360-6
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:7836470-Amino Acid Sequence, pubmed-meshheading:7836470-Animals, pubmed-meshheading:7836470-Arachidonic Acid, pubmed-meshheading:7836470-Calcium, pubmed-meshheading:7836470-Cattle, pubmed-meshheading:7836470-Cell Compartmentation, pubmed-meshheading:7836470-Cell Membrane, pubmed-meshheading:7836470-Cell Movement, pubmed-meshheading:7836470-Cytosol, pubmed-meshheading:7836470-Endothelium, Vascular, pubmed-meshheading:7836470-Enzyme Activation, pubmed-meshheading:7836470-Fibroblast Growth Factor 2, pubmed-meshheading:7836470-Mitogen-Activated Protein Kinase 1, pubmed-meshheading:7836470-Molecular Sequence Data, pubmed-meshheading:7836470-Peptides, pubmed-meshheading:7836470-Phospholipases A, pubmed-meshheading:7836470-Phospholipases A2, pubmed-meshheading:7836470-Phosphorylation, pubmed-meshheading:7836470-Protein-Serine-Threonine Kinases, pubmed-meshheading:7836470-Protein-Tyrosine Kinases, pubmed-meshheading:7836470-Signal Transduction
pubmed:year
1995
pubmed:articleTitle
Activation of cytosolic phospholipase A2 by basic fibroblast growth factor via a p42 mitogen-activated protein kinase-dependent phosphorylation pathway in endothelial cells.
pubmed:affiliation
Department of Cell Biology, Cleveland Clinic Research Institute, Ohio 44195.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't