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2,3,6-tribromo-4,5-dihydroxybenzyl methyl ether induces growth inhibition and apoptosis in MCF-7 human breast cancer cells.

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In this study, we investigated the effects of 2,3,6-tribromo-4,5-dihydroxybenzyl methyl ether (TDB), isolated from Symphyocladia latiuscula (marine red algae), on the proliferation of MCF-7 human breast cancer cells. TDB treatment for 48 h inhibited cancer cell growth and induced DNA fragmentation.

Abyssinone V-4' Methyl Ether, a Flavanone Isolated from Erythrina droogmansiana, Exhibits Cytotoxic Effects on Human Breast Cancer Cells by Induction of Apoptosis and Suppression of Invasion

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Abyssinone V-4' methyl ether (AVME) isolated from Erythrina droogmansiana was recently reported to exhibit anti-mammary tumor effect in mice. The present work was therefore aimed at elucidating its cellular and molecular mechanisms. To achieve our goal, the cytotoxicity of AVME against

Retinyl methyl ether down-regulates activator protein 1 transcriptional activation in breast cancer cells.

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Retinyl methyl ether (RME) is known to prevent the development of mammary cancer. However, the mechanism by which RME exerts its anticancer effect is presently unclear. The diverse biological functions of retinoids, the vitamin A derivatives, are mainly mediated by their nuclear receptors, retinoic

Benzo[a]pyrene sensitizes MCF7 breast cancer cells to induction of G1 arrest by the natural flavonoid eupatorin-5-methyl ether, via activation of cell signaling proteins and CYP1-mediated metabolism.

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Eupatorin-5-methyl ether (E5M) is a flavone containing 4 methoxy groups that is present in plants with medicinal activity, whereas luteolin (L) is a polyhydroxylated flavone commonly encountered in dietary products. In the present study we investigated the interaction of the two flavonoids with

Quercetin‑3‑methyl ether suppresses human breast cancer stem cell formation by inhibiting the Notch1 and PI3K/Akt signaling pathways.

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Breast cancer is a leading cause of mortality among women with cancer worldwide. Quercetin‑3‑methyl ether, a natural compound occurring in various plants, has been indicated to have potent anticancer activity. Breast cancer cell growth and survival were examined by CCK‑8 and colony formation assay,

Quercetin-3-methyl ether inhibits lapatinib-sensitive and -resistant breast cancer cell growth by inducing G(2)/M arrest and apoptosis.

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Lapatinib, an oral, small-molecule, reversible inhibitor of both EGFR and HER2, is highly active in HER2 positive breast cancer as a single agent and in combination with other therapeutics. However, resistance against lapatinib is an unresolved problem in clinical oncology. Recently, interest in the

(R)-FTY720 methyl ether is a specific sphingosine kinase 2 inhibitor: Effect on sphingosine kinase 2 expression in HEK 293 cells and actin rearrangement and survival of MCF-7 breast cancer cells.

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Sphingosine kinase 2 (SK2) catalyses the conversion of sphingosine to the bioactive lipid sphingosine 1-phosphate (S1P). We report here, the stereospecific synthesis of an analogue of FTY720 called (R)-FTY720-OMe, which we show is a competitive inhibitor of SK2. (R)-FTY720-OMe failed to inhibit

Dual-responsive nanoparticles based on chitosan for enhanced breast cancer therapy.

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In this study, we report a novel pH and temperature responsive paclitaxel-loaded drug delivery system based on chitosan and di(ethylene glycol) methyl ether methacrylate. This was functionalized with hyaluronic acid to permit active targeting of CD44-overexpressing human breast cancer cells. The

Design, synthesis and bioevaluation of novel 6-(4-Hydroxypiperidino)naphthalen-2-ol-based potential Selective Estrogen Receptor Modulators for breast cancer.

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In a study directed towards development of novel Selective Estrogen Receptor Modulators (SERMs), 1-(4-(2-(dialkylamino)ethoxy)benzyl)-6-(4-hydroxypiperidin-1-yl)-2-naphthol and corresponding aryl methyl ethers were synthesized and bioevaluated against the estrogen-responsive human MCF-7 breast

A reevaluation of an agent proposed for imaging oestrogen receptors: 17 alpha-[125I]-iodovinyl-11 beta-methoxyoestradiol-3-methyl ether ([125I]VMEME).

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The metabolism of an iodinated steroid, 17 alpha-[125I]iodovinyl-11 beta-methoxyoestradiol-3-methyl ether ([125I]VMEME), previously proposed as a potential agent for imaging oestrogen receptor-containing tissues, has been studied and the conditions for synthesis and labelling redefined. It is

Sphingosine kinase 2 prevents the nuclear translocation of sphingosine 1-phosphate receptor-2 and tyrosine 416 phosphorylated c-Src and increases estrogen receptor negative MDA-MB-231 breast cancer cell growth: The role of sphingosine 1-phosphate receptor-4.

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We demonstrate that pre-treatment of estrogen receptor negative MDA-MB-231 breast cancer cells containing ectopically expressed HA-tagged sphingosine 1-phosphate receptor-2 (S1P2) with the sphingosine kinase 1/2 inhibitor SKi (2-(p-hydroxyanilino)-4-(p-chlorophenyl)thiazole) or the sphingosine

Estrone decorated poly-ion complex micelles for targeted melittin delivery to hormone responsive breast cancer cells.

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Tumor targeting has revolutionized cancer research, especially active cellular targeting of nanoparticles where they are specifically homed to pathological site to deliver the therapeutics. This strategy which involves the utilization of affinity ligands on the surface of the nano-carriers minimizes

In vivo metabolism of 8,2'-diprenylquercetin 3-methyl ether and the distribution of its metabolites in rats by HPLC-ESI-IT-TOF-MSn.

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8,2'-Diprenylquercetin 3-methyl ether, a natural product with prominent anti-breast cancer activity, is the main active constituent of Sinopodophylli Fructus. A high-performance liquid chromatography with a diode array detector coupled with electrospray ionization ion trap time-of-flight multistage

Insights on the transport of tamoxifen by gold nanoparticles for MCF-7 breast cancer cells based on SERS spectroscopy.

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Gold nanoparticles (AuNP) were synthesized and modified with anti-folate receptor antibody (AB), folic acid (FA), crystal violet (CV), poly (ethyleneglycol) methyl ether thiol and the antineoplastic drug tamoxifen (TAM). Such a preparation was incubated in vitro with MCF-7 human breast cancer cells,

Relationship of serum estrogens and estrogen metabolites to postmenopausal breast cancer risk: a nested case-control study.

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BACKGROUND Elevated levels of circulating estrogens are linked to breast cancer risk among postmenopausal women but little is known about the importance of estrogen metabolism. A recently developed liquid chromatography tandem mass spectrometry-based method (LC-MS/MS) measuring a panel of 15

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