diacylglycerol/breast neoplasms

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Diacylglycerol kinase is required for HGF-induced invasiveness and anchorage-independent growth of MDA-MB-231 breast cancer cells.

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BACKGROUND Estrogen receptor (ER)-negative breast cancers have a worse prognosis than ER-positive cancers, being more aggressive and overexposed to stimuli leading to their progression. Hepatocyte growth factor (HGF) has been associated with proliferation, migration and invasion of tumor cells, and

AKR1B10 activates diacylglycerol (DAG) second messenger in breast cancer cells.

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Aldo-keto reductase 1B10 (AKR1B10) is upregulated in breast cancer and promotes tumor growth and metastasis. However, little is known of the molecular mechanisms of action. Herein we report that AKR1B10 activates lipid second messengers to stimulate cell proliferation. Our data showed that ectopic

Relationship of growth stimulated by lithium, estradiol, and EGF to phospholipase C activity in MCF-7 human breast cancer cells.

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Lithium-stimulated MCF-7 cell proliferation was compared to proliferation stimulated by other mitogens for this cell line-estradiol (E2) and epidermal growth factor (EGF)-and lithium was found to be effective within a narrow concentration range. Mitogenic effects of lithium on proliferation

Low-density lipoprotein receptor mRNA in human breast cancer cells: influence by PKC modulators.

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It was reported previously that low-density lipoproteins (LDL) differentially stimulate cell growth of hormone-responsive (ER+) and hormone-unresponsive (ER-) mammary tumor cell lines. Here we examined the mRNA levels of the LDL-receptor (LDL-R) gene with RNAse protection analysis in ER- (MDA-MB-231

Suppression of diacylglycerol levels by antibodies reactive with the c-erbB-2 (HER-2/neu) gene product p185c-erbB-2 in breast and ovarian cancer cell lines.

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Seven of 10 murine monoclonal antibodies reactive with the extracellular domain of p185c-erbB-2 inhibited the anchorage independent growth of the SKBr3 breast cancer cell line that overexpressed p185c-erbB-2. Significant inhibition (56-72%) of diacylglycerol (DAG) levels (P < 0.0001) was observed

Rac-GAP-dependent inhibition of breast cancer cell proliferation by {beta}2-chimerin.

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beta2-Chimerin is a member of the "non-protein kinase C" intracellular receptors for the second messenger diacylglycerol and the phorbol esters that is yet poorly characterized, particularly in the context of signaling pathways involved in proliferation and cancer progression. beta2-Chimerin

[Fatty acid composition of separate fractions of lipids from tumor tissue in breast cancer].

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The distribution of major fatty acids in neutral lipids and phospholipids was studied in breast tumor tissue. The most pronounced differences in the content of individual fatty acids were found in the fractions of diacylglycerol and phosphatidylethanolamine, which mainly applies to unsaturated

Protein kinase C subspecies in estrogen receptor-positive and -negative human breast cancer cell lines.

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Estrogen receptor-positive (MCF7) and -negative (BT20) human breast cancer cell lines, which are frequently used for studies on cancer chemotherapy with triphenylethylene (TPE) anti-estrogens, express at least three protein kinase C subspecies. Two of them are identified as type II PKC having the

Increased diacylglycerol kinase ζ expression in human metastatic colon cancer cells augments Rho GTPase activity and contributes to enhanced invasion.

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BACKGROUND Unraveling the signaling pathways responsible for the establishment of a metastatic phenotype in carcinoma cells is critically important for understanding the pathology of cancer. The acquisition of cell motility is a key property of metastatic tumor cells and is a prerequisite for

A mechanism underlying the effects of polyunsaturated fatty acids on breast cancer.

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Breast cancer is the most frequent cancer in women. Evidence suggests that the polyunsaturated fatty acids (PUFAs), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) affect breast cancer proliferation, differentiation and prognosis. However, the mechanism still remains unclear. In this

Involvement of phospholipase C in heat-shock-induced phosphorylation of P-glycoprotein in multidrug resistant human breast cancer cells.

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The phosphorylation of P-glycoprotein has been appreciated for many years, yet little is known about the factors that initiate this post-translational modification. To determine whether the activation of P-glycoprotein phosphorylation could occur in response to cellular stress and to investigate the

Evidence for a role for protein kinase C in the modulation of bombesin-activated cellular signalling in human breast cancer cells.

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The phorbol ester 12-O-tetradecanoylphorbol 13-acetate (TPA) is a potent activator of protein kinase C (PKC) and is known to affect a variety of biochemical processes in human breast cancer cells. In the present study we have employed MCF-7 cells to investigate the effects of TPA on inositol lipid

Breast cancer cells adapt to metabolic stress by increasing ethanolamine phospholipid synthesis and CTP:ethanolaminephosphate cytidylyltransferase-Pcyt2 activity.

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The significance of phosphatidylethanolamine (PE) in breast cancer cell metabolism was investigated under stress conditions caused by serum deficiency. Serum deficient MCF-7 cells adapt to stress conditions by increasing synthesis and content of PE and diacylglycerol (DAG). The biosynthesis of PE

An unsupervised MVA method to compare specific regions in human breast tumor tissue samples using ToF-SIMS.

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Imaging time-of-flight secondary ion mass spectrometry (ToF-SIMS) and principal component analysis (PCA) were used to investigate two sets of pre- and post-chemotherapy human breast tumor tissue sections to characterize lipids associated with tumor metabolic flexibility and response to treatment.

Angiotensin II activates extracellular signal regulated kinases via protein kinase C and epidermal growth factor receptor in breast cancer cells.

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Angiotensin II (Ang II) induces, through AT1, intracellular Ca(2+) increase in both normal and cancerous breast cells in primary culture (Greco et al., 2002 Cell Calcium 2:1-10). We here show that Ang II stimulated, in a dose-dependent manner, the 24 h-proliferation of breast cancer cells in primary

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