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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Wang, R. Kobayashi, R. Bishop, J. M. |
| Description | Author Affiliation: Wang R ( Department of Microbiology and Immunology, University of California, San Francisco 94143-0552, USA.); |
| Abstract | Cell adhesion has a fundamental role in the proliferation and motility of normal cells and the metastasis of tumor cells. To identify signaling pathways activated by the adherence of tumor cells, we analyzed the tyrosine phosphorylation of proteins in mouse melanoma cells before and after attachment to substrata. We discovered that cellular adherence activated the protein-tyrosine kinase of the cell surface receptor Met, whose ligand is hepatocyte growth factor and scatter factor. The activation was exceedingly prompt, affected the great majority of Met in the cells, persisted so long as the cells remained adherent, and was rapidly reversed as soon as the cells were detached from substrata. Activation of Met required that cells be adherent but not that they spread on the substratum, and it occurred in the absence of any apparent ligand for the receptor. Ligand-independent activation of Met occurred in several varieties of tumor cells but not in normal endothelial cells that express the receptor. The activation of Met described here may represent a means by which cells respond to mechanical as opposed to biochemical stimuli. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 16 |
| Volume Number | 93 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1996-09-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cell Adhesion Melanoma, Experimental Pathology Receptor Protein-Tyrosine Kinases Metabolism Animals DNA Primers Chemistry Gene Expression Ligands Mice Molecular Sequence Data Phosphoproteins Phosphotyrosine Proto-Oncogene Proteins C-met RNA, Messenger Genetics Signal Transduction Tumor Cells, Cultured Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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