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neuroectodermal tumors/phosphatase
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Chondrocytic differentiation of peripheral neuroectodermal tumor cell line in nude mouse xenograft.
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We have established a cell line (KU-SN) from a peripheral neuroectodermal tumor originating in the left scapula of a 4-year-old girl. The original tumor was immunoreactive with antibodies for neurofilament proteins, neuron-specific enolase, vimentin, S100 protein, and beta 2-microglobulin. Dense
Immunophenotype profile of childhood medulloblastomas and supratentorial primitive neuroectodermal tumors using 16 monoclonal antibodies.
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Immunophenotype analysis of 17 childhood medulloblastoma (MED) and supratentorial primitive neuroectodermal tumors (SPNET) was performed on frozen sections using 16 monoclonal antibodies (MoAb) with the biotin-streptavidin alkaline phosphatase immunohistochemical technique. Neuroectodermal
Significant differences in the matrix metalloproteinase expression profiles of spontaneous medulloblastomas/primitive neuroectodermal tumors as compared with their xenografted, established tumor cell line derived counterparts.
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Matrix metalloproteinases (MMP) are a family of zinc-dependent enzymes which degrade various components of the extracellular matrix (ECM) and play an important role in facilitating neoplastic cell invasion and metastasis. Structural changes in the extracellular matrix are necessary for cell
Differential expression of somatostatin receptors, P44/42 MAPK, and mTOR activation in medulloblastomas and primitive neuroectodermal tumors.
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Recently, somatostatin receptors (SSR) have been identified on medulloblastomas and proposed as a new target for chemotherapy including inhibitory somatostatin analogs. Activation of SSRs inhibit growth, in part, by activating phosphatases that dephosphorylate/deactivate growth stimulatory signaling
Leukocyte common antigen-related receptor-linked tyrosine phosphatase. Regulation of mRNA expression.
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Receptor-linked tyrosine phosphatases regulate cell growth by dephosphorylating proteins involved in tyrosine kinase signal transduction. Within this gene family, the leukocyte common antigen-related (LAR) gene is of particular interest with respect to the nervous system because it has sequence
Leukocyte common-antigen-related tyrosine phosphatase receptor: altered expression of mRNA and protein in the New England Deaconess Hospital rat line exhibiting spontaneous pheochromocytoma.
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Regulation of cell proliferation by protein tyrosine phosphatases (PTPs) suggests that PTPs are important tumor suppressor genes. The gene encoding the leukocyte common-antigen-related (LAR) PTP receptor maps to chromosome 1p32-33, a region in which loss of heterozygosity is associated with human
LAR tyrosine phosphatase receptor: alternative splicing is preferential to the nervous system, coordinated with cell growth and generates novel isoforms containing extensive CAG repeats.
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Receptor-linked tyrosine phosphatases regulate cell growth by dephosphorylating proteins involved in tyrosine kinase signal transduction. The leukocyte common antigen-related (LAR) tyrosine phosphatase receptor has sequence similarity to the neural cell adhesion molecule N-CAM and is located in a
Matrix metalloproteinase expression in childhood medulloblastomas/primitive neuroectodermal tumors.
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The matrix metalloproteinases (MMPs) are a family of enzymes that degrade the extracellular matrix (ECM) and are considered to be important in neoplastic cell invasion and metastasis. Structural changes in the extracellular matrix are necessary for cell migration during tissue remodeling and
Immunocytochemical detection of the homeobox B3, B4, and C6 gene products in childhood medulloblastomas/primitive neuroectodermal tumors.
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The homeobox was originally described as a conserved DNA motif of about 180 base pairs. The protein domain encoded by the homeobox, the homeodomain, is thus about 60 amino acids long. The homeodomain is a DNA-binding domain, and many homeobox genes have now been shown to bind to DNA and regulate the
[Clinicopathologic and immunohistochemical study of atypical teratoid/rhabdoid tumor of central nervous system].
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OBJECTIVE
To study the clinicopathologic features and differential diagnosis of atypical teratoid/rhabdoid tumor (AT/RT) occurring in the central nervous system.
METHODS
Two cases of AT/RT were studied by hematoxylin-eosin, reticulin and immunohistochemical staining. The clinical and pathologic
Fas (APO-1, CD95) receptor expression and new options for immunotherapy in childhood medulloblastomas.
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Central nervous system (CNS) tumors are the most common solid neoplasms in children. Medulloblastomas (MEDs) resemble embryonic neuroectodermal stem cells and their immature, uncommitted neuronal and glial progeny. Apoptosis is a basic physiological process wherein the cell initiates a sequence of
Expression of proline-directed protein kinase, (p34cdc2/p58cyclin A), a novel cell proliferation marker in childhood brain tumors.
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The presence of two proteins of the proline-directed protein kinase (PDPK), the catalytic subunit p34cdc2 and the regulatory subunit p58cyclin A was determined in seven primitive neuroectodermal tumors (PNETs), three choroid plexus neoplasms and eleven astroglial tumors. The highest expression was
Immunophenotypical analysis and immunobiology of childhood brain tumors.
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Cancer associated markers (CAMs) are the biochemical and immunological counterparts of the morphology of neoplasms. The expression of an immunocytochemically defined CAM is related to the tissue of origin and is not a random event. During the past two decades, the use of MoABs against oncofetal,
Expression in childhood primary brain tumors of NY-ESO-1, a cancer/testis antigen: an immunohistochemical study.
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BACKGROUND
NY-ESO-1 is a human gene that codes for antigens that are expressed in malignancies of various histological types, but not in normal tissues, except the testes. The expression of NY-ESO-1 in intracranial brain tumors including astrocytomas (ASTRs) and medulloblastomas (MEDs)/primitive
Immunophenotypic characterization of infiltrating polynuclear and mononuclear cells in childhood brain tumors.
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During a systematic cell surface antigen expression profile analysis of 76 primary childhood brain tumors (34 medulloblastomas/primitive neuroectodermal tumors and 42 astrocytomas), we employed the following library of monoclonal antibodies (MoABs): anti-Leu-2/a; anti-Leu-3/a; anti-Leu-M5;
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