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https://hdl.handle.net/2440/56942
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dc.contributor.author | Gamble, J. | - |
dc.contributor.author | Sun, W. | - |
dc.contributor.author | Li, X. | - |
dc.contributor.author | Hahn, C. | - |
dc.contributor.author | Pitson, S. | - |
dc.contributor.author | Vadas, M. | - |
dc.contributor.author | Bonder, C. | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | American Journal of Pathology, 2009; 175(5):2217-2225 | - |
dc.identifier.issn | 0002-9440 | - |
dc.identifier.issn | 1525-2191 | - |
dc.identifier.uri | http://hdl.handle.net/2440/56942 | - |
dc.description.abstract | Sphingosine kinase (SK)-1 promotes endothelial cell (EC) survival through the cell junction molecule CD31 (platelet endothelial cell adhesion molecule-1). The integrin vβ3 is also essential for EC survival; inhibition of vβ3 ligation promotes apoptosis. Herein we demonstrate that under basal conditions, SK-1, vβ3, and CD31 exist as a heterotrimeric complex. Under conditions that affect EC survival such as loss of contact with the extracellular matrix or growth factor activation, more of this heterotrimeric complex forms. Overexpression studies demonstrate a requirement for SK-1 phosphorylation at serine 225 for increased heterotrimeric complex formation, activation of vβ3, and EC survival signals, including Bcl-X and nuclear factor-B pathways. Moreover, β3 integrin depletion confirmed the requirement for this heterotrimeric complex in SK-1-mediated EC survival. Thus, with vβ3 integrin being identifiable primarily on angiogenic ECs and SK-1 being highly expressed in tumors, targeting SK-1 may affect multiple survival pathways, and its inhibition may be highly efficacious in controlling pathological EC survival. | - |
dc.description.statementofresponsibility | Jennifer R. Gamble, Wai Y. Sun, Xiaochun Li, Christopher N. Hahn, Stuart M. Pitson, Mathew A. Vadas and Claudine S. Bonder | - |
dc.language.iso | en | - |
dc.publisher | Amer Soc Investigative Pathology Inc | - |
dc.source.uri | http://dx.doi.org/10.2353/ajpath.2009.090076 | - |
dc.subject | Cells, Cultured | - |
dc.subject | Focal Adhesions | - |
dc.subject | Endothelial Cells | - |
dc.subject | Humans | - |
dc.subject | Phosphotransferases (Alcohol Group Acceptor) | - |
dc.subject | Integrin alphaVbeta3 | - |
dc.subject | Membrane Proteins | - |
dc.subject | Proto-Oncogene Proteins | - |
dc.subject | RNA, Small Interfering | - |
dc.subject | Apoptosis | - |
dc.subject | Cell Survival | - |
dc.subject | Apoptosis Regulatory Proteins | - |
dc.subject | Focal Adhesion Protein-Tyrosine Kinases | - |
dc.subject | Bcl-2-Like Protein 11 | - |
dc.subject | Platelet Endothelial Cell Adhesion Molecule-1 | - |
dc.title | Sphingosine kinase-1 associates with Integrin alpha(V)beta(3) to mediate endothelial cell survival | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.2353/ajpath.2009.090076 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Hahn, C. [0000-0001-5105-2554] | - |
dc.identifier.orcid | Pitson, S. [0000-0002-9527-2740] | - |
dc.identifier.orcid | Bonder, C. [0000-0001-9875-967X] | - |
Appears in Collections: | Aurora harvest 5 Molecular and Biomedical Science publications |
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