glioma/phosphatase

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Protein phosphatase 1γ regulates the proliferation of human glioma via the NF-κB pathway.

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Protein phosphatase 1γ (PP1γ), a member of mammalian protein phosphatases, serine/threonine phosphatases, catalyzes the majority of protein dephosphorylation events and regulates diverse cellular processes, such as neuronal signaling, muscle contraction, glycogen synthesis, and cell proliferation.

Soluble protein tyrosine phosphatase receptor type Z (PTPRZ) in cerebrospinal fluid is a potential diagnostic marker for glioma

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Background: High-grade glioma is the most pervasive and lethal of all brain malignancies. Despite advances in imaging technologies, discriminating between gliomas and other brain diseases such as multiple sclerosis (MS) often requires

[Alkaline phosphatase activity in human gliomas as revealed by light and electron microscopy].

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Precise localization of alkaline phosphatase (ALPase) activity in human gliomas was examined by light and electron microscopy in association with malignant transformation, paying much attention to changes in blood-brain barrier. Materials used were eight cases of gliomas four of which were

Reduced expression of the Aalpha subunit of protein phosphatase 2A in human gliomas in the absence of mutations in the Aalpha and Abeta subunit genes.

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Protein phosphatase 2A (PP2A) consists of 3 subunits: the catalytic subunit, C, and the regulatory subunits, A and B. The A and C subunits both exist as 2 isoforms (alpha and beta) and the B subunit as multiple forms subdivided into 3 families, B, B' and B". It has been reported that the genes

Phosphatase activities in human glioma cells as revealed by light and electron microscopy--a preliminary study.

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Alkaline phosphatase (ALPase) and Mg2+-activated ATPase (Mg2+-ATPase) activities were demonstrated in human brain tumors by light and electron microscopy. Four cases of glioma, i.e., two cases of astrocytoma, grade II, and two cases of glioblastoma, were used as materials. At the light microscopic

Protein phosphatase 4 catalytic subunit is overexpressed in glioma and promotes glioma cell proliferation and invasion.

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Protein phosphatase 4 catalytic subunit (PP4C) has been identified to be overexpressed in various solid cancers. However, to date, the role of PP4C in glioma remains elusive. In the present study, we aimed to detect PP4C expression in glioma patients and explore its function in glioma and prognostic

Phenotypic analysis of human glioma cells expressing the MMAC1 tumor suppressor phosphatase.

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MMAC1, also known as PTEN or TEP-1, was recently identified as a gene commonly mutated in a variety of human neoplasias. Sequence analysis revealed that MMAC1 harbored sequences similar to those found in several protein phosphatases. Subsequent studies demonstrated that MMAC1 possessed in vitro

β1,6 GlcNAc branches-modified protein tyrosine phosphatase Mu attenuates its tyrosine phosphatase activity and promotes glioma cell migration through PLCγ-PKC pathways.

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The metastatic potential of malignant tumor has been shown to be correlated with the increased expression of tri- and tetra-antennary β1,6-N-acetylglucosamine (β1,6-GlcNAc) N-glycans. In this study, We found that GnT-V expression was negatively correlated with receptor protein tyrosine phosphatase

Study of O-glycan sialylation in C6 cultured glioma cells: regulation of a beta-galactoside alpha 2,3 sialyltransferase activity by Ca2+/calmodulin antagonists and phosphatase inhibitors.

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We have demonstrated that the alpha 2,3 sialyltransferase (alpha 2,3 ST) from C6 cultured glioma cells was inhibited in vivo by W-7 and related Ca2+/Calmodulin (Ca/CaM) antagonists while protein kinase C effectors had no effect. Dephosphorylation of alpha 2,3 ST by the wide specificity alkaline

Antibody guided diagnosis and therapy of brain gliomas using radiolabeled monoclonal antibodies against epidermal growth factor receptor and placental alkaline phosphatase.

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Twenty-seven patients with brain glioma were scanned using 123I-labeled monoclonal antibodies against epidermal growth factor receptor (EGFR1) or placental alkaline phosphatase (H17E2). Successful localization was achieved in 18 out of 27 patients. Eleven out of 27 patients were also studied using a

Molecular genetic analysis of phosphatase and tensin homolog and p16 tumor suppressor genes in patients with malignant glioma.

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OBJECTIVE Several genes have been shown to carry mutations in human malignant gliomas, including the phosphatase and tensin homolog (PTEN) deleted on chromosome 10 and p16 tumor suppressor genes. Alterations of this gene located on chromosome 10 q23 and 9p21, respectively, may contribute to

Modification of opioid receptor activity by acid phosphatase in neuroblastoma x glioma NG108-15 hybrid cells.

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Opioid receptor activity in neuroblastoma x glioma NG108-15 hybrid cell membranes was attenuated by acid phosphatase purified by high performance liquid chromatography and devoid of protease activity. Treatment of membranes with this phosphatase decreased opioid inhibition of adenylate cyclase and

Over-expression of wild-type p53-induced phosphatase 1 confers poor prognosis of patients with gliomas.

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Wild-type p53-induced phosphatase 1 (Wip1) is a member of the protein phosphatase 2C family, which is characterized by distinctive oncogenic properties. Overexpression of Wip1 is observed in certain types of human tumors that are associated with significantly poor prognosis. This study aimed to

The PTEN lipid phosphatase domain is not required to inhibit invasion of glioma cells.

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The tumor suppressor PTEN negatively controls the phosphoinositide 3-kinase pathway for cell survival by dephosphorylating the phospholipid substrates phosphatidylinositol 3,4-bisphosphate and phosphatidylinositol 3,4,5-trisphosphate. PTEN has been proposed to dephosphorylate focal adhesion kinase

Cloning of a highly conserved human protein serine-threonine phosphatase gene from the glioma candidate region on chromosome 19q13.3.

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Allelic loss studies have suggested that a glioma tumor suppressor gene resides in a 425-kb region of chromosome 19q, telomeric to D19S219 and centromeric to D19S112. Exon amplification of a cosmid contig spanning this region yielded four exons with high homology to a rat protein serine-threonine

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