phospholipase/neoplasms

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Inhibition of phospholipase cgamma1 and cancer cell proliferation by triterpene esters from Uncaria rhynchophylla.

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Investigation of the hooks of Uncaria rhynchophylla resulted in isolation of six phospholipase Cgamma1 (PLCgamma1) inhibitors (1-6). The structures of these compounds were elucidated as pentacyclic triterpene esters by spectroscopic and chemical analysis. Three of them, namely uncarinic acids C (1),

Lysophosphatidic acid stimulates phospholipase D activity and cell proliferation in PC-3 human prostate cancer cells.

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Phospholipase D (PLD) is activated in mammalian cells in response to a variety of growth factors and may play a role in cell proliferation. Lysophosphatidic acid (LPA) is a bioactive metabolite potentially generated as a result of PLD activation. Two human prostate cancer cell lines, PC-3 and LNCaP,

Biomimetic nanoassemblies of 1-O-octodecyl-2-conjugated linoleoyl-sn-glycero-3-phosphatidyl gemcitabine with phospholipase A2-triggered degradation for the treatment of cancer.

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Phospholipids are important biomolecules with strong self-assembling ability to form biomembranes or liposomes. However, biomimetic prodrugs of phospholipids are not well known, including their self-assembling behavior at the air/water interface or in aqueous media. Here we design and prepare a

Inhibition of phosphatidylcholine-specific phospholipase C results in loss of mesenchymal traits in metastatic breast cancer cells.

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BACKGROUND Acquisition of mesenchymal characteristics confers to breast cancer (BC) cells the capability of invading tissues different from primary tumor site, allowing cell migration and metastasis. Regulators of the mesenchymal-epithelial transition (MET) may represent targets for anticancer

Neoplastic transformation and tumorigenesis associated with overexpression of phospholipase D isozymes in cultured murine fibroblasts.

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Phospholipase D (PLD) has been suggested to play an important role in a variety of cellular functions. PLD activity has been shown to be significantly elevated in many tumours and transformed cells, suggesting the possibility that PLD might be involved in tumorigenesis. In this study, we have

Increased plasma group II phospholipase A(2) concentrations in patients with acute myocardial infarction: correlation with tumor necrosis factor-alpha.

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OBJECTIVE Group II phospholipase A(2) (PLA(2)) is thought to play an important role in inflammation and tissue injury. It has been suggested that the inflammatory process is important in the setting and progression of myocardial ischemia or reperfusion. We measured plasma PLA(2) as well as

Release of carcinoembryonic antigen from human tumor cells by phosphatidylinositol-specific phospholipase C: highly effective extraction and upregulation from LS-174T colonic adenocarcinoma cells.

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Carcinoembryonic antigen (CEA), produced by gastrointestinal tumor cells, is anchored to cell membrane by a glycosyl-phosphatidylinositol moiety which can be cleaved with phosphatidylinositol-specific phospholipase C (PI-PLC). We studied the extraction of CEA from living human colon carcinoma

Evidence that porcine pancreatic phospholipase A2 via its high affinity receptor stimulates extracellular matrix invasion by normal and cancer cells.

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Cellular migration and extracellular matrix (ECM) invasion are some of the critical steps in embryonic implantation, inflammation, wound healing, and cancer metastasis. Extracellular phospholipases A2 (PLA2s), belonging to either group I (PLA2-I) or group II (PLA2-II), play an essential role in the

Myotoxic phospholipases A(2) isolated from Bothrops brazili snake venom and synthetic peptides derived from their C-terminal region: cytotoxic effect on microorganism and tumor cells.

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This paper reports the purification and biochemical/pharmacological characterization of two myotoxic phospholipases A(2) (PLA(2)s) from Bothrops brazili venom, a native snake from Brazil. Both myotoxins (MTX-I and II) were purified by a single chromatographic step on a CM-Sepharose ion-exchange

Phospholipase C (PLC)ε Promotes Androgen Receptor Antagonist Resistance via the Bone Morphogenetic Protein (BMP)-6/SMAD Axis in a Castration-Resistant Prostate Cancer Cell Line.

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BACKGROUND Primary therapy for patients with advanced prostate cancer (PCa) consists of androgen deprivation therapy targeting the androgen receptor (AR) axis. However, most tumors progress to castration-resistant prostate cancer (CRPC) within 18-24 months. The purpose of the present study was to

Adenovirus E3-10.4K/14.5K protein complex inhibits tumor necrosis factor-induced translocation of cytosolic phospholipase A2 to membranes.

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We have reported that three adenovirus (Ad) proteins, named E3-10.4K/14.5K, E3-14.7K, and E1B-19K, independently inhibit tumor necrosis factor (TNF)-induced apoptosis in Ad-infected cells. E3-10.4K/14.5K and E3-14.7K also inhibit TNF-induced release of arachidonic acid (AA). TNF-induced apoptosis

Oncogenic action of phospholipase A2 in prostate cancer.

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Mortality from prostate cancer is a result of progression of cancer cells to become androgen-refractory and metastatic. Eicosanoid products of the cyclooxygenase (COX) and lipoxygenase (LOX) pathways are important mediators of the proliferation of prostate cancer cells in culture and regulate tumour

Phosphatidylcholine-specific phospholipase C and phospholipase D are respectively implicated in mitogen-activated protein kinase and nuclear factor kappaB activation in tumour-necrosis-factor-alpha-treated immature acute-myeloid-leukaemia cells.

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Tumour necrosis factor-alpha (TNFalpha) has been reported to induce potent growth inhibition of committed myeloid progenitor cells, whereas it is a potential growth stimulator of human CD34(+)CD38(-) multipotent haematopoietic cells. The present study was aimed at evaluating the respective role of

Synthesis and Evaluation of Cytosolic Phospholipase A(2) Activatable Fluorophores for Cancer Imaging.

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Activatable fluorophores selective to cytosolic phospholipase A2 (cPLA2) were synthesized and evaluated for their ability to image triple negative breast cancer cells. The activatable constructs were synthesized by esterification of a small molecule fluorophore with a fatty acid resulting in ablated

The activity of cytosolic phospholipase A2 is required for the lysis of adenovirus-infected cells by tumor necrosis factor.

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Most cell types are resistant to apoptosis induced by tumor necrosis factor (TNF) unless the cells are treated with a sensitizing agent. Inhibitors of transcription or translation act as sensitizing agents, as do adenoviruses lacking one or more resistance genes. We have reported recently that the

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