trolox/neoplasms

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Inhibitory effect of Trolox on the migration and invasion of human lung and cervical cancer cells.

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The antioxidant 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox) is implicated in migration and invasion of metastatic tumors. However, the molecular mechanism underlying the effect of Trolox on metastatic cancer cells is not known. We found that a non-cytotoxic dose of Trolox

In Vitro Antioxidant and Cancer Inhibitory Activity of a Colored Avocado Seed Extract.

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Avocado (Persea americana) seeds have been used traditionally for a number of health-related indications. Because of its high polyphenol content, we investigated the potential antioxidant and anticancer effects of a colored avocado seed extract (CASE). CASE exhibited an oxygen radical

Screening of potential cancer preventing chemicals as antioxidants in an in vitro assay.

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We used an azo-initiated fluorescence assay to rank a series of antioxidants, with the objective of selecting compounds for further evaluation as chemopreventive agents. Trolox was the positive control for the assay and, with an IC50 of 0.50 microM, was more active than any of the other 16 compounds

Non-enzymatic antioxidant capacity and risk of gastric cancer.

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BACKGROUND Consumption of fruit and vegetables has been inversely related to gastric cancer. Two studies found that dietary antioxidant capacity has some role in explaining this association. We investigated the overall antioxidant effect from diet on gastric cancer using three measures of

Dietary total antioxidant capacity in relation to endometrial cancer risk: a case-control study in Italy.

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OBJECTIVE To investigate the role of the overall antioxidant activity of diet, we estimated the relation between three dietary indices of total antioxidant capacity (TAC) and endometrial cancer risk METHODS We analyzed data from an Italian case-control study including 454 women with incident,

In vitro culture studies of Sutherlandia frutescens on human tumor cell lines.

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Sutherlandia frutescens is a South African herb used traditionally by the natives to treat cancer, and more recently to improve the overall health in HIV/AIDS patients. Gas chromatography/mass spectrometer profiling and liquid chromatographic/mass spectral investigation confirmed and quantified the

Protective effect of photodegradation product of nifedipine against tumor necrosis factor alpha-induced oxidative stress in human glomerular endothelial cells.

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Recently, increasing evidence suggests that the antihypertensive drug nifedipine acts as a protective agent for endothelial cells, and that the activity is unrelated to its calcium channel blocking. Nitrosonifedipine (NO-NIF) is metabolically and photochemically produced from nifedipine, and NO-NIF

Pleiotropic effects of fenretinide in neuroblastoma cell lines and multicellular tumor spheroids.

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The efficacy and mechanism of action of fenretinide (4-HPR), a vitamin A analogue, was investigated in a panel of six neuroblastoma cell lines and multicellular tumor spheroids. The latter are three dimensional cell aggregates and as such, a model for micrometastases. In all cell lines, the

Oligomycin inhibits HIF-1alpha expression in hypoxic tumor cells.

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Hypoxia-inducible factor-1 (HIF-1) is a key regulator of cellular responses to reduced oxygen availability. The contribution of mitochondria in regulation of HIF-1alpha in hypoxic cells has received recent attention. We demonstrate that inhibition of electron transport complexes I, III, and IV

The cytotoxicity of garlic-related disulphides and thiosulfonates in WHCO1 oesophageal cancer cells is dependent on S-thiolation and not production of ROS.

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BACKGROUND Garlic has been used for centuries in folk medicine for its health promoting and cancer preventative properties. The bioactive principles in crushed garlic are allyl sulphur compounds which are proposed to chemically react through (i) protein S-thiolation and (ii) production of

Trolox selectively enhances arsenic-mediated oxidative stress and apoptosis in APL and other malignant cell lines.

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Although arsenic trioxide (As(2)O(3)) is an effective therapy in acute promyelocytic leukemia (APL), its use in other malignancies is limited by the toxicity of concentrations required to induce apoptosis in non-APL tumor cells. We looked for agents that would synergize with As(2)O(3) to induce

Isolation and identification of strawberry phenolics with antioxidant and human cancer cell antiproliferative properties.

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Studies suggest that consumption of berry fruits, including strawberries ( Fragaria x ananassa Duch.), may have beneficial effects against oxidative stress mediated diseases such as cancer. Berries contain multiple phenolic compounds, which are thought to contribute to their biological properties.

Selective cytotoxic effect of Rhododendron luteum extract on human colon and liver cancer cells.

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OBJECTIVE The genus Rhododendron is distributed entirely in the world with the exception of South and Central America and Africa, growing in a large diversity of climatic conditions. This genus is a rich source of phenolic compounds, especially flavonoids, essential oils, chromones, terpenoids, and

An evaluation of the antioxidant and potential pro-oxidant properties of food additives and of trolox C, vitamin E and probucol.

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The food additives propyl gallate and vanillin inhibited iron ion-dependent lipid peroxidation in rat-liver microsomes, but stimulated formation of a deoxyribose degrading species, probably hydroxyl radical, from ferric-EDTA and hydrogen peroxide. Propyl gallate accelerated DNA damage by the

Reactive oxygen species mediated apoptosis of esophageal cancer cells induced by marine triprenyl toluquinones and toluhydroquinones.

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Marine invertebrates, algae, and microorganisms are prolific producers of novel secondary metabolites. Some of these secondary metabolites have the potential to be developed as chemotherapeutic agents for the treatment of a wide variety of diseases, including cancer. We describe here the mechanism

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