arachidonate/breast neoplasms

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Control of the growth of human breast cancer cells in culture by manipulation of arachidonate metabolism.

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BACKGROUND Arachidonate metabolites are important regulators of human breast cancer cells. Production of bioactive lipids are frequently initiated by the enzyme phospholipase A2 which releases arachidonic acid (AA) that is rapidly metabolized by cyclooxygenases (COX) or lipoxygenases (LO) to other

The endogenous subcellular localisations of the long chain fatty acid-activating enzymes ACSL3 and ACSL4 in sarcoma and breast cancer cells.

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Fatty acid uptake and metabolism are often dysregulated in cancer cells. Fatty acid activation is a critical step that allows these biomolecules to enter cellular metabolic pathways such as mitochondrial β-oxidation for ATP generation or the lipogenic routes that generate bioactive lipids such as

Aberrant expression of 5-lipoxygenase-activating protein (5-LOXAP) has prognostic and survival significance in patients with breast cancer.

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5-lipoxygenase (5-LOX)-activating protein, 5-LOXAP also known as LOX5AP or FLAP, is a protein that works closely with 5-LOX in regulating the metabolism of arachidonate. Some of the eicosanoid products of 5-LOX/5-LOXAP are known to play active roles in the function of cancer cells, including breast

N,N-diethyl-2-[4-(phenylmethyl) phenoxy] ethanamine (DPPE; tesmilifene), a chemopotentiating agent with hormetic effects on DNA synthesis in vitro, may improve survival in patients with metastatic breast cancer.

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N,N-diethyl-2-[4-(phenylmethyl) phenoxy] ethanamine (DPPE; tesmilifene) is a novel anti-histaminic and chemopotentiating agent that has a hormetic effect on DNA synthesis in MCF (Michigan Cancer Foundation)-7 human breast cancer cells in vitro and stimulates the growth of experimental tumors in

Detection and Differentiation of Breast Cancer Sub-Types using a cPLA2α Activatable Fluorophore.

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Cytosolic phospholipase A2α (cPLA2α) has been shown to be elevated in breast cancer and is a potential biomarker in the differentiation of molecular sub-types. Using a cPLA2α activatable fluorophore, DDAO arachidonate, we explore its ability to function as a contrast agent in fluorescence-guided

Effects of linoleic acid and gamma-linolenic acid on the growth and metastasis of a human breast cancer cell line in nude mice and on its growth and invasive capacity in vitro.

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It has been reported that gamma-linolenic acid (GLA)-rich diets suppress mammary carcinogenesis and transplanted tumor growth and that GLA inhibits the growth of cultured human cancer cell lines. We compared the effects of dietary GLA and linoleic acid (LA) on the growth of MDA-MB-435 human breast

Regulation of arachidonic acid metabolism, aromatase activity and growth in human breast cancer cells by interleukin-1beta and phorbol ester: dissociation of a mediatory role for prostaglandin E2 in the autocrine control of cell function.

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Prostaglandin E2 (PGE2) levels are elevated in malignant human breast tissue. However, the cellular mechanisms regulating this arachidonate metabolism and the autocrine influence PGE2 production may have on breast cancer cell growth and function are unclear. In the present study, we have

Unsaturated fatty acid effects on human breast cancer cell adhesion.

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Polyunsaturated fatty acids influence several steps involved in metastasis formation in animal tumor models. During the process of metastasis from the primary site, tumor cells adhere to the endothelium and underlying basement membrane before extravasation and secondary growth. The purpose of this

Nipple aspirate fluids from women with breast cancer contain increased levels of group IIa secretory phospholipase A2.

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Arachidonic acid, a bioactive molecule metabolized into prostaglandins and leukotrienes, contributes to cellular proliferation and tumor progression. Group IIa secretory phospholipase A2 (sPLA2-IIa) can facilitate arachidonate release from cellular phospholipids, suggesting its involvement in tumor

A lipoxygenase inhibitor in breast cancer brain metastases.

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The complication of multiple brain metastases in breast cancer patients is a life threatening condition with limited success following standard therapies. The arachidonate lipoxygenase pathway appears to play a role in brain tumor growth as well as inhibition of apoptosis in in-vitro studies. The

Composition and turnover of phospholipids and neutral lipids in human breast cancer and reference tissues.

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The phospholipid (PL) content was 4-fold higher while the triacylglycerol (TG) content tended to be 65% lower in human breast cancer tissues as compared with non-cancerous reference parts from excised breast tissues. The variation in TG content among breast tissues was very large while that of PL

Cyclooxygenase and lipoxygenase gene expression in the inflammogenesis of breast cancer.

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We examined the expression of major inflammatory genes, cyclooxygenase-1 and 2 (COX1, COX2) and arachidonate 5-lipoxygenase (ALOX5) in 1090 tumor samples of invasive breast cancer from The Cancer Genome Atlas (TCGA). Mean cyclooxygenase expression (COX1 + COX2) ranked in the upper 99th percentile of

Enhanced angiogenesis and growth of 12-lipoxygenase gene-transfected MCF-7 human breast cancer cells in athymic nude mice.

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Transfection of the estrogen-dependent and poorly invasive MCF-7 human breast cancer cell line so that it stably overexpressed 12-lipoxygenase and secreted high levels of 12-hydroxyeicosatetraenoic acid when cultured with arachidonate resulted in rapid growth in athymic nude mice when compared with

The 12-lipoxygenase gene-transfected MCF-7 human breast cancer cell line exhibits estrogen-independent, but estrogen and omega-6 fatty acid-stimulated proliferation in vitro, and enhanced growth in athymic nude mice.

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The estrogen-dependent, linoleic acid (LA)-unresponsive, MCF-7 breast cancer cell line was transfected with 12-lipoxygenase (12-LOX) cDNA (MCF-7/12-LOX cells). The transfectant stably expressed high levels of 12-LOX mRNA and protein, and secreted large quantities of 12-hydroxyeicosatetraenoic acid

Bay11-7082 inhibits the disintegration of the lymphendothelial barrier triggered by MCF-7 breast cancer spheroids; the role of ICAM-1 and adhesion.

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BACKGROUND Many cancers spread through lymphatic routes, and mechanistic insights of tumour intravasation into the lymphatic vasculature and targets for intervention are limited. The major emphasis of research focuses currently on the molecular biology of tumour cells, while still little is known

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