glioblastoma/phosphatase

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Src homology domain-containing phosphatase 2 suppresses cellular senescence in glioblastoma.

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BACKGROUND Epidermal growth factor receptor (EGFR) signalling is frequently altered during glioblastoma de novo pathogenesis. An important downstream modulator of this signal cascade is SHP2 (Src homology domain-containing phosphatase 2). METHODS We examined the The Cancer Genome Atlas (TCGA)

5' phospholipid phosphatase SHIP-2 causes protein kinase B inactivation and cell cycle arrest in glioblastoma cells.

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The tumor suppressor protein PTEN is mutated in glioblastoma multiform brain tumors, resulting in deregulated signaling through the phosphoinositide 3-kinase (PI3K)-protein kinase B (PKB) pathway, which is critical for maintaining proliferation and survival. We have examined the relative roles of

Receptor protein tyrosine phosphatase zeta as a therapeutic target for glioblastoma therapy.

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Astrocytomas are the most frequent brain tumour type in adults. The most common astrocytoma is the glioblastoma (GBM), which is also the most malignant and refractory to treatment--ultimately leading to the patient's death within a year of diagnosis. Neither the classical nor more experimental

Nuclear Protein Phosphatase 1 α (PP1A) Expression is Associated with Poor Prognosis in p53 Expressing Glioblastomas.

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BACKGROUND Protein phosphatase 1 α (PP1A) is an enzyme intimately associated with cell cycle, the over expression of which has been demonstrated in glioblastoma (GBM). Further, the nuclear expression of PP1A has been shown to be highly specific to GBM. In addition, PP1A has been shown to be a

Dual-specificity phosphatase (DUSP6) in human glioblastoma: epithelial-to-mesenchymal transition (EMT) involvement

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Objective: Glioblastoma (GBM) is the most aggressive and common form of primary brain cancer. Survival is poor and improved treatment options are urgently needed. Dual specificity phosphatase-6 (DUSP6) is actively involved in oncogenesis

Protein Phosphatases-A Touchy Enemy in the Battle Against Glioblastomas: A Review.

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Glioblastoma (GBM) is the most common malignant tumor arising from brain parenchyma. Although many efforts have been made to develop therapies for GBM, the prognosis still remains poor, mainly because of the difficulty in total resection of the tumor mass from brain tissue and the resistance of the

Monotherapy efficacy of blood-brain barrier permeable small molecule reactivators of protein phosphatase 2A in glioblastoma

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Glioblastoma is a fatal disease in which most targeted therapies have clinically failed. However, pharmacological reactivation of tumour suppressors has not been thoroughly studied as yet as a glioblastoma therapeutic strategy. Tumour suppressor protein phosphatase 2A is inhibited by non-genetic

The protein tyrosine phosphatase TCPTP suppresses the tumorigenicity of glioblastoma cells expressing a mutant epidermal growth factor receptor.

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Glioblastoma multiforme (GBM) is the most aggressive type of glioma and GBMs frequently contain amplifications or mutations of the EGFR gene. The most common mutation results in a truncated receptor tyrosine kinase known as Delta EGFR that signals constitutively and promotes GBM growth. Here, we

Protein tyrosine phosphatase mu regulates glioblastoma cell growth and survival in vivo.

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Glioblastoma multiforme (GBM) is the most lethal primary brain tumor. Extensive proliferation and dispersal of GBM tumor cells within the brain limits patient survival to approximately 1 year. Hence, there is a great need for the development of better means to treat GBM. Receptor protein tyrosine

Effects of epidermal growth factor receptor and phosphatase and tensin homologue gene expression on the inhibition of U87MG glioblastoma cell proliferation induced by protein kinase inhibitors.

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The aim of the present study was to analyse the antiproliferative effects and mechanisms of action of protein kinase inhibitors (PKIs) in human glioblastoma multiforme (GBM) cells with different epidermal growth factor receptor (EGFR) and phosphatase and tensin homologue (PTEN) status. The GBM cell

Do phosphatase of regenerating liver-3, matrix metalloproteinases-2, matrix metalloproteinases-9, and epidermal growth factor receptor-1 predict response to therapy and survival in glioblastoma multiforme?

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BACKGROUND Poor survival of the glioblastoma multiforme (GBM) has been attributed in part to the invasive nature of the lesion making complete surgical removal near impossible. Phosphatase of regenerating liver-3 (PRL-3), matrix metalloproteinases-2 and -9 (MMP-2 and MMP-9), and epidermal growth

MicroRNA-182 targets protein phosphatase 1 regulatory inhibitor subunit 1C in glioblastoma.

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Glioblastoma (GBM) is an incurable cancer, with mean post-diagnosis survival time of 14-16 months. Metagenomic analysis by The Cancer Genome Atlas (TCGA) program has identified microRNA-182-5p (miR-182-5p or miR-182) as the only miRNA associated with favorable disease prognosis and temozolomide

Proteome profile changes that are differentially regulated by lipid and protein phosphatase activities of tumor suppressor PTEN in PTEN-expressing U-87 MG human glioblastoma cells.

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The phosphatase and tensin homolog tumor suppressor (PTEN) belongs to a class of "gatekeeper" tumor suppressors together with p53, retinoblastoma and adenomatous polyposis. It is considered one of the most important tumor suppressors in the post p53 era. Previously to identify the molecules involved

Serine/threonine protein phosphatase 6 modulates the radiation sensitivity of glioblastoma.

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Increasing the sensitivity of glioblastoma cells to radiation is a promising approach to improve survival in patients with glioblastoma multiforme (GBM). This study aims to determine if serine/threonine phosphatase (protein phosphatase 6 (PP6)) is a molecular target for GBM radiosensitization

Increased expression of Mcl-1 is required for protection against serum starvation in phosphatase and tensin homologue on chromosome 10 null mouse embryonic fibroblasts, but repression of Bim is favored in human glioblastomas.

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Inactivating mutations in the tumor suppressor gene phosphatase and tensin homologue on chromosome 10 (PTEN) result in elevated levels of phosphatidylinositol (3,4,5)-trisphosphate, activation of protein kinase B (PKB), and protection against apoptotic insults such as withdrawal of survival factors.

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