procyanidin a 2/karcinóm prsníka

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Pentameric procyanidin from Theobroma cacao selectively inhibits growth of human breast cancer cells.

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A naturally occurring, cocoa-derived pentameric procyanidin (pentamer) was previously shown to cause G0/G1 cell cycle arrest in human breast cancer cells by an unknown molecular mechanism. Here, we show that pentamer selectively inhibits the proliferation of human breast cancer cells (MDA MB-231,

A comparative anticancer study on procyanidin C1 against receptor positive and receptor negative breast cancer.

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Albezia odoratissima has many health benefits. The present study investigated the isolation, characterization and anticancer activity of procyanidin C1 from A. odoratissima bark. Procyanidin C1 was isolated and characterized by IR, ¹³C NMR, ¹H NMR and LC-MS spectroscopic

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

Proanthocyanidin in red rice inhibits MDA-MB-231 breast cancer cell invasion via the expression control of invasive proteins.

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Proanthocyanidin is one of the main active compounds found in red jasmine rice. We previously reported that red rice extract could reduce cancer cell invasion. However, the direct effect of proanthocyanidin from red rice on the invasion of cancer cells and the exact molecular mechanism remained

Grape seed extract suppresses MDA-MB231 breast cancer cell migration and invasion.

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OBJECTIVE Breast cancer remains a leading cause of mortality among women. In metastasis, cascade migration of cancer cells and invasion of extracellular matrix (ECM) represent critical steps. Urokinase-type plasminogen activator (uPA), as well as metalloproteinases MMP-2 and MMP-9, strongly

Studies in polyphenol chemistry and bioactivity. 4.(1) Synthesis of trimeric, tetrameric, pentameric, and higher oligomeric epicatechin-derived procyanidins having all-4beta,8-interflavan connectivity and their inhibition of cancer cell growth through cell cycle arrest.

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We report an improved synthesis of bis(5,7,3',4'-tetra-O-benzyl)epicatechin 4beta,8-dimer (3) from 5,7,3',4'-tetra-O-benzylepicatechin (1) and 5,7,3',4'-tetra-O-benzyl-4-(2-hydroxyethoxy)epicatechin (2) by replacing the previously employed Lewis acid, titanium tetrachloride, with the clay mineral

Suppression of estrogen biosynthesis by procyanidin dimers in red wine and grape seeds.

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In breast cancer, in situ estrogen production has been demonstrated to play a major role in promoting tumor growth. Aromatase is the enzyme responsible for the conversion of androgen substrates into estrogens. This enzyme is highly expressed in breast cancer tissue compared with normal breast

In vitro antioxidant activity of phenolic-enriched extracts from Zhangping Narcissus tea cake and their inhibition on growth and metastatic capacity of 4T1 murine breast cancer cells.

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Phenolics, as the main bioactive compounds in tea, have been suggested to have potential in the prevention of various human diseases. However, little is known about phenolics and their bioactivity in Zhangping Narcissue tea cake which is considered the most special kind of oolong tea. To unveil its

Procyanidins as antioxidants and tumor cell growth modulators.

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Five procyanidin fractions with different structural complexities were obtained after fractionation of a grape seed extract. The procyanidin fraction's abilities to inhibit lipid peroxidation induced by 2,2'-azobis-2-methyl-propanimidamide dihydrochloride in a liposomal membrane system were

Stryphnodendron adstringens ("Barbatimão") Leaf Fraction: Chemical Characterization, Antioxidant Activity, and Cytotoxicity Towards Human Breast Cancer Cell Lines.

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We evaluated the chemical composition, antioxidant activity, and antitumor potential of a fraction that was isolated from Stryphnodendron adstringens (barbatimão) leaf aqueous extract. Fraction is composed by gallic acid, procyanidin dimer B1, and (-)-epicatechin-3-O-gallate and it exhibits

Inhibitory effects of sea buckthorn procyanidins on fatty acid synthase and MDA-MB-231 cells.

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Fatty acid synthase (FAS) is overexpressed in many human cancers including breast cancer and is considered to be a promising target for therapy. Sea buckthorn has long been used to treat a variety of maladies. Here, we investigated the inhibitory effect of sea buckthorn procyanidins (SBPs) isolated

Detarium microcarpum, Guiera senegalensis, and Cassia siamea Induce Apoptosis and Cell Cycle Arrest and Inhibit Metastasis on MCF7 Breast Cancer Cells.

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Despite the availability of anticancer drugs, breast cancer remains the most death-causing tumor-related disease in women. Hence, there is a need for discovery and development of efficient alternative drugs, and sources such as plants need to be explored. In this study, antioxidant capacities and

Procyanidin b2 cytotoxicity to mcf-7 human breast adenocarcinoma cells.

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Procyanidins have attracted some attention due to their demonstrated chemopreventive action, a relatively new and promising strategy to prevent cancer. Breast cancer is one of the leading causes of death in women worldwide and its treatment needs improvements. The aim of this work was to verify the

Identifying peach and plum polyphenols with chemopreventive potential against estrogen-independent breast cancer cells.

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Our objective was to evaluate the cancer suppression activity of extracts from a commercial variety of yellow-fleshed peach 'Rich Lady' (RL) and a red-fleshed plum 'Black Splendor' (BS) and identify the phenolic fractions that may possess potential as chemopreventive and/or chemotherapeutic natural

Mechanisms of DNA methyltransferase-inhibitor interactions: Procyanidin B2 shows new promise for therapeutic intervention of cancer.

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DNA methyltransferases (DNMTs) is a key epigenetic enzyme for pharmacological manipulation and is employed in cancer reprogramming. During past few years multiple strategies have been implemented to excavate epigenetic compounds targeting DNMTs. In light of the emerging concept of chemoinformatics,

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