staurosporine/breast neoplasms

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Role of extracellular matrix in regulation of staurosporine-induced apoptosis in breast cancer cells.

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Autocrine and paracrine mechanisms modulate the synthesis and secretion of extracellular matrix (ECM); moreover, each component of the ECM is capable of modulating the synthesis and release of other ECM molecules. Therefore, the synthesis of ECM glycoprotein fibronectin and laminin was studied in

Comparison of the efficacy of 7-hydroxystaurosporine (UCN-01) and other staurosporine analogs to abrogate cisplatin-induced cell cycle arrest in human breast cancer cell lines.

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DNA-damaging agents such as cisplatin arrest cell cycle progression at either the G1, S, or G2 phase, although the G1 arrest is seen only in cells expressing the wild-type p53 tumor suppressor protein. Caffeine has been shown to abrogate the S and G2 arrest in p53-defective cells and to enhance

Profilin1 facilitates staurosporine-triggered apoptosis by stabilizing the integrin β1-actin complex in breast cancer cells.

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Profilin1 (Pfn1) functions as a tumour suppressor against malignant phenotypes of cancer cells. A minimum level of Pfn1 is critical for the differentiation of human epithelial cells, and its lower expression correlates with the tumourigenesis of breast cancer cells and tissues. However, the

Silencing RBBP6 (Retinoblastoma Binding Protein 6) sensitises breast cancer cells MCF7 to staurosporine and camptothecin-induced cell death.

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Retinoblastoma Binding Protein 6 (RBBP6) is a multi-domain protein that uses its ring finger domain to interact with p53 and pRb tumour suppressor genes. The mechanism by which RBBP6 uses to degrade p53 is still unknown; nonetheless it is well known that RBBP6 promotes cell proliferation in several

Effective treatment of drug resistant recurrent breast tumors harboring cancer stem-like cells by staurosporine/epirubicin co-loaded polymeric micelles.

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Breast cancer recurrence and resistance are associated with cancer stem-like cell (CSC) sub-populations. As conventional therapies fail to treat CSCs, institution of novel therapeutic strategies capable of eradicating both cancer cells and CSCs is central for achieving effective treatments with

γ-Secretase-dependent cleavage of E-cadherin by staurosporine in breast cancer cells.

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E-cadherin is a transmembrane protein that serves as a cell adhesion molecule component of the adherens junction. We previously showed that cadmium induced γ-secretase-dependent E-cadherin cleavage via oxidative stress. In this study, we report that staurosporine (STS)-induced apoptosis induces

E-cadherin decreased human breast cancer cells sensitivity to staurosporine by up-regulating Bcl-2 expression.

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E-cadherin, a well-characterized cell-cell adhesion molecule, executes multifunction roles on cell behaviors. However, its effect on chemo-resistance remains controversial. In this study, we found that E-cadherin positive breast cell lines were less sensitive to staurosporine compared to E-cadherin

Staurosporine-induced death of MCF-7 human breast cancer cells: a distinction between caspase-3-dependent steps of apoptosis and the critical lethal lesions.

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To test the role of caspase 3 in apoptosis and in overall cell lethality caused by the protein kinase inhibitor staurosporine, we compared the responses of MCF-7c3 cells that express a stably transfected CASP-3 gene to parental MCF-7:WS8 cells transfected with vector alone and lacking procaspase-3

Staurosporine augments EGF-mediated EMT in PMC42-LA cells through actin depolymerisation, focal contact size reduction and Snail1 induction - a model for cross-modulation.

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BACKGROUND A feature of epithelial to mesenchymal transition (EMT) relevant to tumour dissemination is the reorganization of actin cytoskeleton/focal contacts, influencing cellular ECM adherence and motility. This is coupled with the transcriptional repression of E-cadherin, often mediated by

Knockdown of the small conductance Ca(2+) -activated K(+) channels is potently cytotoxic in breast cancer cell lines.

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OBJECTIVE Small conductance calcium-activated potassium (KCa 2.x) channels have a widely accepted canonical function in regulating cellular excitability. In this study, we address a potential non-canonical function of KCa 2.x channels in breast cancer cell survival, using in vitro

Caspase-3 inhibits the growth of breast cancer cells independent of protease activity.

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In this study, the MCF-7 breast cancer cells that lack caspase-3 were transfected with a wild type (WT) or mutant caspase-3 cDNA. Expression of the WT, but not of the mutant, caspase-3 was associated with increased caspase activity and susceptibility to staurosporine (STS)-induced apoptosis. Both

KT5823 differentially modulates sodium iodide symporter expression, activity, and glycosylation between thyroid and breast cancer cells.

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Na(+)/I(-) symporter (NIS)-mediated iodide uptake into thyroid follicular cells serves as the basis of radioiodine therapy for thyroid cancer. NIS protein is also expressed in the majority of breast tumors, raising potential for radionuclide therapy of breast cancer. KT5823, a staurosporine-related

Staurosporine, an inhibitor of hormonally up-regulated neu-associated kinase.

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HUNK is a protein kinase that is implicated in HER2-positive (HER2+) breast cancer progression and resistance to HER2 inhibitors. Though prior studies suggest there is therapeutic potential for targeting HUNK in HER2+ breast cancer, pharmacological agents that target HUNK are yet to be identified. A

Inhibition of stimulus-dependent epidermal growth factor receptor and transforming growth factor-alpha mRNA accumulation by the protein kinase C inhibitor staurosporine.

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The ability of staurosporine, a potent inhibitor of protein kinase C, to block certain cellular events initiated by 12-O-tetradecanoylphorbol-13-acetate (TPA) and epidermal growth factor (EGF) was examined. Treatment of MDA468 breast cancer cells with TPA decreases EGF binding to the cell surface

Inhibitor Response to HER2 G776(YVMA) In-frame Insertion in HER2-positive Breast Cancer.

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Human epidermal growth factor receptor 2 (HER2/neu or HER2) has long been recognized as an attractive therapeutic target for breast cancer. The YVMA in-frame insertion at the residue G776 (G776(YVMA)) of HER2 kinase domain is a frequently observed mutation that can largely shift drug sensitivity in

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