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flavanol/cancro da mama
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12 resultados
Flavanols from Japanese quince (Chaenomeles japonica) fruit inhibit human prostate and breast cancer cell line invasiveness and cause favorable changes in Bax/Bcl-2 mRNA ratio.
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Polyphenols are natural compounds of high structural diversity which translates into a very wide spectrum of biological activities, including chemoprevention. Here we report that a Japanese quince fruit flavanol preparation (JQFFP) caused favorable changes in Bax/Bcl-2 mRNA ratio, which rendered
Synthesis, characterization and biological evaluation of ruthenium flavanol complexes against breast cancer.
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Four Ru(II) DMSO complexes (M1R-M4R) having substituted flavones viz. 3-Hydroxy-2-(4-methoxyphenyl)-4H-chromen-4-one (HL1), 3-Hydroxy-2-(4-nitrophenyl)-4H-chromen-4-one (HL2), 3-Hydroxy-2-(4-dimethylaminophenyl)-4H-chromen-4-one (HL3) and 3-Hydroxy-2-(4-chlorophenyl)-4H-chromen-4-one (HL4) were
Urinary polyphenols, glutathione S-transferases copy number variation, and breast cancer risk: results from the Shanghai women's health study.
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In vitro studies have found that flavanol epigallocatechin (EGC) and flavonols, but not flavanol epicatechin (EC), activate glutathione S-transferases (GSTs), a family of phase II enzymes that detoxify reactive oxygen species, such as catechol estrogen metabolites. This study was designed to
Monomeric and oligomeric flavanols are agonists of membrane androgen receptors.
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The present work reports a new mode of action of the naturally occurring flavanols catechin and epicatechin and their dimers B2 and B5, in the breast cancer T47D cell line, namely, their interaction with membrane androgen receptors. We show that monomeric and dimeric flavanols are complete (B2) or
Association between flavonoids, flavonoid subclasses intake and breast cancer risk: a case-control study in China.
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Anti-tumor effect of dietary flavonoids has been sustained by laboratory experiments, but epidemiological studies with breast cancer risk remained inconsistent and insufficient. This study aimed to investigate the associations between total and subclasses of flavonoid and breast cancer risk among
Procyanidins from evening primrose (Oenothera paradoxa) defatted seeds inhibit invasiveness of breast cancer cells and modulate the expression of selected genes involved in angiogenesis, metastasis, and apoptosis.
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There is a growing interest in plant polyphenols (including flavanols) that exhibit pleiotropic biological activities such as antiinflammatory, antioxidant, and anticancer effects. Here, we report for the first time the inhibition of MDA-MB-231 breast cancer cell viability and invasiveness by an
Phytochemical Analysis with Antioxidant and Cytotoxicity Studies of the Bioactive Principles from Zanthoxylum capense (Small Knobwood).
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BACKGROUND
Zanthoxylum capense (small knobwood) is a South African species known for a wide range of anecdotal uses. However, there is a dearth of information on its phytoconstitutional make-up, specifically its knobs, with only a few reports on the bioactive compounds that could justify its
Flavonoids, proanthocyanidins, and cancer risk: a network of case-control studies from Italy.
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We considered flavonoids and proanthocyanidins in a network of multicentric Italian case-control studies including about 10,000 incident, histologically confirmed cases of selected cancers and over 16,000 controls. Odds ratios (ORs) for the highest vs. the lowest quintile of 6 classes of flavonoids
Chemical analysis and screening as anticancer agent of anthocyanin-rich extract from Uva Caimarona ( Pourouma cecropiifolia Mart.) fruit.
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The anthocyanin-rich extract (ARE) of the fruit from Pourouma cecropiifolia , a tropical plant native to the Amazon region, showed moderate cytotoxicity toward different cancer cell lines when evaluated by MTT assays. This extract was fractionated using Sephadex LH-20 chromatography to obtain three
Bioassay-guided isolation of antiproliferative compounds from grape (Vitis vinifera) stems.
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The fractionation, guided by cell-growth inhibition assay, of the EtOAc crude extract from grape stems of the Sicilian Vitis vinifera variety 'Nerello Mascalese' allowed identification often constituents, isolated either as pure compounds (1, 3-5, 7-10) or inseparable mixtures (2a-d and 6a-e). The
Litchi flavonoids: isolation, identification and biological activity.
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The current status of the isolation, identification, biological activity, utilization and development prospects of flavonoids found in litchi fruit pericarp (LFP) tissues is reviewed. LFP tissues account for approximately 15% by weight of the whole fresh fruit and are comprised of significant amount
Induction of cancer cell apoptosis by flavonoids is associated with their ability to inhibit fatty acid synthase activity.
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The consumption of food products containing high amounts of flavonoids has been reported to lower the risk of various cancers. The mechanisms underlying the cancer-protective effects of these naturally occurring polyphenolic compounds, however, remain elusive. Based on our previous finding that the
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