Abstract
Glioblastoma multiforme is the most common and lethal form of primary brain cancer. Diagnosis of this advanced glioma has a poor prognosis due to the ineffectiveness of current therapies. Aberrant expression of receptor tyrosine kinases (RTK) in glioblastoma multiformes is suggestive of their role in initiation and maintenance of these tumors of the central nervous system. In fact, ectopic expression of the orphan RTK ROS is a frequent event in human brain cancers, yet the pathologic significance of this expression remains undetermined. Here, we show that a glioblastoma-associated, ligand-independent rearrangement product of ROS (FIG-ROS) cooperates with loss of the tumor suppressor gene locus Ink4a;Arf to produce glioblastomas in the mouse. We show that this FIG-ROS-mediated tumor formation in vivo parallels the activation of the tyrosine phosphatase SH2 domain-containing phosphatase-2 (SHP-2) and a phosphatidylinositol 3-kinase/Akt/mammalian target of rapamycin signaling axis in tumors and tumor-derived cell lines. We have established a fully penetrant preclinical model for adult onset of glioblastoma multiforme in keeping with major genetic events observed in the human disease. These findings provide novel and important insights into the role of ROS and SHP-2 function in solid tumor biology and set the stage for preclinical testing of targeted therapeutic approaches.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Astrocytoma / enzymology
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Astrocytoma / metabolism
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Astrocytoma / pathology
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Brain Neoplasms / enzymology
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Brain Neoplasms / metabolism*
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Brain Neoplasms / pathology
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Cyclin-Dependent Kinase Inhibitor p16 / deficiency
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Cyclin-Dependent Kinase Inhibitor p16 / genetics
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Enzyme Activation
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Glioblastoma / enzymology
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Glioblastoma / metabolism*
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Glioblastoma / pathology
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Intracellular Signaling Peptides and Proteins / metabolism
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Mice
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Phosphatidylinositol 3-Kinases / metabolism*
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Protein Kinases / metabolism*
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Protein Phosphatase 2
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Protein Tyrosine Phosphatase, Non-Receptor Type 11
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Protein Tyrosine Phosphatases / metabolism
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Protein-Tyrosine Kinases / biosynthesis
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Protein-Tyrosine Kinases / genetics
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Protein-Tyrosine Kinases / metabolism*
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Proto-Oncogene Proteins / biosynthesis
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Proto-Oncogene Proteins / genetics
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Proto-Oncogene Proteins / metabolism*
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Proto-Oncogene Proteins c-akt / metabolism
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Recombinant Fusion Proteins / biosynthesis
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Recombinant Fusion Proteins / genetics
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Recombinant Fusion Proteins / metabolism
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SH2 Domain-Containing Protein Tyrosine Phosphatases
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Signal Transduction
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TOR Serine-Threonine Kinases
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Tumor Suppressor Protein p14ARF / deficiency
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Tumor Suppressor Protein p14ARF / genetics
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src Homology Domains
Substances
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Cdkn2a protein, mouse
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Cyclin-Dependent Kinase Inhibitor p16
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Intracellular Signaling Peptides and Proteins
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Proto-Oncogene Proteins
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Recombinant Fusion Proteins
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Tumor Suppressor Protein p14ARF
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Protein Kinases
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MTOR protein, human
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mTOR protein, mouse
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Protein-Tyrosine Kinases
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ROS1 protein, human
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Proto-Oncogene Proteins c-akt
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TOR Serine-Threonine Kinases
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Protein Phosphatase 2
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PTPN11 protein, human
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Protein Tyrosine Phosphatase, Non-Receptor Type 11
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Protein Tyrosine Phosphatases
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Ptpn11 protein, mouse
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SH2 Domain-Containing Protein Tyrosine Phosphatases