neuroectodermal tumors primitive/phosphatase

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[The activity of alkaline phosphatase in the CNS tissues of rats and in inoculated ependymoblastoma at various stages of its development].

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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

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

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;

Clinical and prognostic significance of Ki-67 and proliferating cell nuclear antigen expression in childhood primitive neuroectodermal brain tumors.

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The cell proliferation activity of sixteen childhood primitive neuroectodermal tumors (PNETs) was observed immunocytochemically, to determine the cell kinetics and cell proliferation activity of these relatively undifferentiated, malignant brain tumors. Two mouse anti-human monoclonal antibodies

Controversies on the prognostic significance of tumor infiltrating leukocytes in solid human tumors.

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We have performed immunophenotypical (IP) analyses of tumor infiltrating leukocytes (TIL) in both childhood brain tumors (medulloblastomas[MEDs]/primitive neuroectodermal tumors [PNETs] and astrocytomas [ASTRs]) and malignant melanomas (both primary and metastatic) employing a well-characterized

Immunocytochemical detection of leukocyte-associated and apoptosis-related antigen expression in childhood brain tumors.

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During systematic cell-surface antigen expression profile analyses of 76 primary childhood brain tumors [34 medulloblastomas (MED)/primitive neuroectodermal tumors (PNETs) and 42 astrocytomas (ASTR)], a library of monoclonal antibodies (MoABs) directed against various leukocyte-associated,

Cyclooxygenase-2 (COX-2) overexpression in childhood brain tumors.

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The overexpression of COX enzymes has been demonstrated in human neoplasms at various sites, including the colon, gastrointestinal tract, lung, skin and recently in brain tumors. In this study, COX-2 receptor overexpression in primary childhood brain tumors was determined and the distribution

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