arachidonic acid/kansè

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The shunting of arachidonic acid metabolism to 5-lipoxygenase and cytochrome p450 epoxygenase antagonizes the anti-cancer effect of cyclooxygenase-2 inhibition in head and neck cancer cells.

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BACKGROUND It has recently been found that 5-lipoxygenase (5-LO) and cytochrome P450-2J2 (CYP2J2), molecules capable of arachidonic acid (AA) metabolism, might promote cancer cell viability through several mechanisms similar to those of cyclooxygenase-2 (COX-2). We found that not only COX-2

Stimulation of arachidonic acid metabolism by different types of tumor promoters.

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Skin tumor-promoting agents, including the 12-O-tetradecanoylphorbol-13-acetate (TPA)-type tumor promoters, such as diterpine phorbol esters, teleocidin and aplysiatoxin, and a non-TPA-type tumor promoter (the newly described palytoxin, present in the coelenterate of the genus Palythoa), stimulated

Metabolism of exogenous and endogenous arachidonic acid in cancer.

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Epidemiologic evidence in humans and controlled trials in animal models indicate that total dietary fat increases the risk of cancer. The animal evidence indicates that the greatest efficacy in promoting carcinogenesis is achieved with omega-6 fatty acids with little or no effect from either the

Regulation of arachidonic acid in esophageal adenocarcinoma cells and tumor-infiltrating lymphocytes.

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The generation and development of esophageal adenocarcinoma (EAC) are correlated with neuroimmunological factors. The aim of this study was to observe the effectiveness of the neurotransmitter arachidonic acid (AA) on two EAC cell lines, OE19 and SK-GT-4, as well as three isolated tumor-infiltrating

Recombinant human uteroglobin inhibits the in vitro invasiveness of human metastatic prostate tumor cells and the release of arachidonic acid stimulated by fibroblast-conditioned medium.

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Uteroglobin (UG) is a potent immunomodulatory and antiinflammatory secretory protein with high levels detected in human prostate tissue. We used three human prostate cancer cell lines (DU-145, PC3-M, and LNCaP) to test the hypothesis that UG may modulate invasiveness of prostatic carcinoma cells in

Altered responses of human macrophages to lipopolysaccharide by hydroperoxy eicosatetraenoic acid, hydroxy eicosatetraenoic acid, and arachidonic acid. Inhibition of tumor necrosis factor production.

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The regulation of allergic and autoimmune inflammatory reactions by polyunsaturated fatty acids and their metabolic products (eicosanoids) continues to be of major interest. Our data demonstrate that arachidonic acid 5,8,11,14-eicosatetraenoic acid (20:4n-6) and its hydroxylated derivatives

Inhibitors of arachidonic acid metabolism potentiate tumour necrosis factor-alpha-induced apoptosis in HL-60 cells.

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We investigated whether and how could various modulators of arachidonic acid metabolism affect apoptosis induced by tumour necrosis factor-alpha (TNF-alpha) in human myeloid leukaemia HL-60 cells. These included arachinonyltrifluoromethyl ketone (AACOCF3; cytosolic phospholipase A2 inhibitor),

Arachidonic acid potentiates superoxide anion radical production by murine peritoneal macrophages stimulated with tumor promoters.

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The role of arachidonic acid (AA) metabolism in the stimulation of oxygen radical production by murine peritoneal macrophages treated with tumor promoters was assessed. In vivo administration of the phospholipase A2 inhibitor dibromacetophenone, the anti-inflammatory steroid fluocinolone acetonide

Novel action of n-3 polyunsaturated fatty acids: inhibition of arachidonic acid-induced increase in tumor necrosis factor receptor expression on neutrophils and a role for proteases.

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OBJECTIVE Neutrophils and tumor necrosis factor (TNF) play important roles in the pathogenesis of rheumatoid arthritis (RA). Modulation of TNF receptors (TNFRs) may contribute to the regulation of tissue damage, and n-6 polyunsaturated fatty acids (PUFAs) such as arachidonic acid (AA) can increase

Study of arachidonic Acid pathway in human bladder tumor.

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Recent epidemiological studies and animal experiments have demonstrated that nonsteroidal anti-inflammatory drugs (NSAIDs) reduce the incidence of colorectal carcinoma. Cyclooxygenase (COX) is the principal target of NSAIDs. COX is the first oxidase in the process of prostaglandin production from

Arachidonic acid pathway: A molecular target in human testicular cancer (Review).

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Recent epidemiological studies and animal experiments have demonstrated that non-steroidal anti-inflammatory drugs (NSAIDs) reduce the incidence of colorectal carcinoma. Cyclooxygenase (COX), the first oxidase in the process of prostaglandin production from arachidonic acid, is the principal target

Ethanol and arachidonic acid synergize to activate Kupffer cells and modulate the fibrogenic response via tumor necrosis factor alpha, reduced glutathione, and transforming growth factor beta-dependent mechanisms.

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Because of the contribution of ethanol and polyunsaturated fatty acids (PUFAs) to alcoholic liver disease, we investigated whether chronic ethanol administration and arachidonic acid (AA) could synergistically mediate Kupffer cell (KC) activation and modulate the stellate cell (HSC) fibrogenic

Platelet-activating factor and arachidonic acid metabolites mediate tumor necrosis factor and eicosanoid kinetics and cardiopulmonary dysfunction during bacteremic shock.

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OBJECTIVE Platelet-activating factor (PAF) and eicosanoids are putative mediators of septic shock that are associated with release of tumor necrosis factor (TNF). The purpose of this investigation was to a) examine temporal patterns of TNF and arachidonic acid metabolite release in a porcine model

Tumour-necrosis-factor-mediated cytotoxicity is correlated with phospholipase-A2 activity, but not with arachidonic acid release per se.

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L929, a murine fibrosarcoma cell line highly sensitive to the anti-proliferative and cytotoxic action of tumour necrosis factor (TNF), was used as a target cell in our studies. We [Suffys et al. (1987) Biochem. Biophys. Res. Commun. 149, 735-743], as well as others, have previously provided evidence

The in vitro development of cytotoxicity in response to granulocyte/macrophage-colony-stimulating factor or interferon gamma in the peripheral blood monocytes of patients with solid tumors: modulation by arachidonic acid metabolic inhibitors.

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The capacity of granulocyte/macrophage-colony-stimulating factor (GM-CSF) and interferon gamma (IFN gamma) to elicit monocyte cytotoxicity in vitro in the peripheral blood monocytes of patients with solid tumors was investigated. The cytotoxicity elicited by IFN gamma was significantly reduced in

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