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neuroectodermal tumors primitive/l tyrosin
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Pediatric brain tumors express multiple receptor tyrosine kinases including novel cell adhesion kinases.
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We have used the polymerase chain reaction to clone and characterize growth factor receptor tyrosine kinases (RTKs) expressed in 3 pathologically distinct pediatric brain tumors, an anaplastic ependymoma, a glioblastoma multiforme and a primitive neuroectodermal tumor (PNET). These neoplasms are
Targeting VEGF-VEGFR Pathway by Sunitinib in Peripheral Primitive Neuroectodermal Tumor, Paraganglioma and Epithelioid Hemangioendothelioma: Three Case Reports.
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Sunitinib malate (Sutent(TM); Pfizer Inc., New York, N.Y., USA) is a small molecule kinase inhibitor with activity against a number of tyrosine kinase receptors, including vascular endothelial growth factor receptors, stem-cell factor receptor, and platelet-derived growth factor receptors alpha and
[Diagnostic utility of tyrosine hydroxylase in peripheral neuroblastic tumors].
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Objective: To investigation the diagnostic utility of tyrosine hydroxylase (TH) immunohistochemically as a marker of peripheral neuroblastic tumors(pNT). Methods: The study included 1 024 cases, 643 primary and metastatic pNT cases, 381 non-pNT cases, including small round cell tumors such as
Dynamics of cell proliferation and cell death during the emergence of primitive neuroectodermal tumors of the immature central nervous system in transgenic mice.
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Cell proliferation and cell death play critical roles in embryonic development, postnatal tissue maintenance, and tumor formation. To understand the interplay between cell proliferation and death in tumor formation, we studied these two processes in nascent primitive neuroectodermal tumors that
A continuous cell line (KK-2) from a supratentorial primitive neuroectodermal tumor.
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Tumor tissue located in the occipital lobe with hemorrhage was obtained from a 19-year-old patient. Histological examination indicated it to consist of undifferentiated small, round cells without neuronal or glial differentiation, and possibly to be a type of primitive neuroectodermal tumor. The
Neurotrophins and Trk receptors in primitive neuroectodermal tumor cell lines.
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OBJECTIVE
Primitive neuroectodermal tumors (PNETs) are thought to be derived from early central nervous system precursors. Therefore, we hypothesized that the neurotrophins (nerve growth factor, brain-derived neurotrophic factor, and neurotrophin-3) and their receptors (TrkA, TrkB, and TrkC), which
Identification of a novel tyrosine kinase receptor-like molecule in neuroblastomas.
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Growth factor receptors are important determinants of both normal and abnormal cell growth. We have now used degenerate primers designed from conserved tyrosine kinase domains to identify and clone a novel receptor-like molecule (designated Nbtk-1) from a NB41 mouse neuroblastoma cell line. Nbtk-1
Activation of RET tyrosine kinase regulates interleukin-8 production by multiple signaling pathways.
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Interleukin-8 (IL-8) is known to contribute to human cancer progression through its potential function as a mitogenic, angiogenic, or motogenic factor. We found a high level of IL-8 production in SK-N-MC human primitive neuroectodermal tumor cells transfected with the human RET gene (SK-N-MC (RET)
Molecular characterization and chromosomal localization of DRT (EPHT3): a developmentally regulated human protein-tyrosine kinase gene of the EPH family.
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By screening a human fetal brain cDNA expression library using a monoclonal antiphosphotyrosine antibody and by 5' RACE procedures, we have isolated overlapping cDNAs encoding a receptor-type tyrosine kinase belonging to the EPH family, DRT (Developmentally Regulated EPH-related Tyrosine kinase
cDNA cloning, molecular characterization, and chromosomal localization of NET(EPHT2), a human EPH-related receptor protein-tyrosine kinase gene preferentially expressed in brain.
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By screening a human fetal brain cDNA expression library using a monoclonal anti-phosphotyrosine antibody, we have isolated a cDNA clone encoding a receptor type protein-tyrosine kinase belonging to the EPH family, NET (neuronally expressed EPH-related tyrosine kinase). NET shows 87% homology in
Characterization of intracellular signals via tyrosine 1062 in RET activated by glial cell line-derived neurotrophic factor.
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Glial cell line derived neurotrophic factor (GDNF) signals through a multicomponent receptor complex consisting of RET receptor tyrosine kinase and a member of GDNF family receptor alpha (GFRalpha). Recently, it was shown that tyrosine 1062 in RET represents a binding site for SHC adaptor proteins
Tyrosine kinase activity of the ret proto-oncogene products in vitro.
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We investigated tyrosine kinase activity of the ret proto-oncogene products (proto-Ret proteins), using a cell lysate of NB-39-nu neuroblastoma cells. The 150 kDa and 170 kDa proto-Ret proteins immunoprecipitated with antibodies against their carboxy-terminal 20 amino acids were shown to be
A general aspect on soft-tissue sarcoma and c-kit expression in primitive neuroectodermal tumor and Ewing's sarcoma. Is there any role in disease process?
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OBJECTIVE
Within soft-tissue sarcoma, primitive neuroectodermal tumors have been shown to cover a wide spectrum of small round cell sarcomas, including Ewing's sarcomas (ES) and primitive neuroectodermal tumors (PNET). The role of the stem cell factor/kit pathway has been investigated in different
Olfactory neuroblastoma is a peripheral primitive neuroectodermal tumor related to Ewing sarcoma.
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Olfactory neuroblastoma (ONB) is a malignant tumor of the nasal mucosa whose histogenesis is unclear. A relationship to neuroblastoma (NB), a pediatric tumor of the sympathetic nervous system, is based on morphologic similarities and the expression of similar neural antigens. However, the clinical
Peripheral neuroepithelioma (peripheral primitive neuroectodermal tumor) of the uterine cervix.
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We report here a case of peripheral neuroepithelioma arising in the uterine cervix. A 44-year-old female had complained of irregular genital bleeding for several months and was diagnosed as extraosseous Ewing's sarcoma (EOE) from biopsy specimens initially. The tumor cells, which were intensely
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