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Cytotoxic Effect of Erythroxylum suberosum Combined with Radiotherapy in Head and Neck Cancer Cell Lines.

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The mouth and oropharynx cancer is the 6th most common type of cancer in the world. The treatment may involve surgery, chemotherapy and radiotherapy. More than 50% of drugs against cancer were isolated from natural sources, such as Catharanthus roseus and epipodophyllotoxin, isolated from

Tropane alkaloids from the stem bark of Erythroxylum bezerrae

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Six previously undescribed tropane alkaloids, designated as erythrobezerrines A-F, were isolated from the EtOH extract from the stem bark of Erythroxylum bezerrae Plowman. Their structures were elucidated based on the interpretation of the NMR and MS data and in some instances, confirmed by X-ray

Reversal of multidrug resistance by tropane alkaloids from the stems of Erythroxylum rotundifolium.

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Six tropane alkaloid esters were isolated from the stems of Erythroxylum rotundifolium. The structures of three new tropane esters, 7beta-hydroxy-6beta-(3,4,5-trimethoxybenzoyloxy)-3alpha-(E)-(3,4,5-trimethoxycinnamoyloxy)tropane (1), 6beta-benzoyloxy-3alpha-(Z)-(3,4,5-trimethoxycinnamoyloxy)tropane

Pervilleines B and C, new tropane alkaloid aromatic esters that reverse the multidrug-resistance in the hollow fiber assay.

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P-Glycoprotein (Pgp)-mediated drug efflux can yield a multidrug-resistance phenotype that is associated with poor response to cancer chemotherapy. Pervilleines B and C (PB and PC), two new tropane alkaloid aromatic esters obtained from a chloroform extract of the roots of Erythroxylum pervillei as

Pervilleine A, a novel tropane alkaloid that reverses the multidrug-resistance phenotype.

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P-Glycoprotein-mediated drug efflux can yield a multidrug-resistance (MDR) phenotype that is associated with a poor response to cancer chemotherapy. Pervilleine A, a novel tropane alkaloid obtained from a chloroform extract of Erythroxylum pervillei as the result of bioactivity-guided fractionation,

Characterization of tropane alkaloid aromatic esters that reverse the multidrug-resistance phenotype.

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P-Glycoprotein (Pgp) associated multidrug-resistance (MDR) is a significant factor that can lead to the failure of cancer chemotherapy. Several new tropane alkaloid aromatic esters obtained from extracts of Erythroxylum pervillei Baillon (Erythroxylaceae) (1-8) and Erythroxylum rotundifolium Lunan

Pervilleine F, a new tropane alkaloid aromatic ester that reverses multidrug resistance.

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P-glycoprotein (Pgp)-mediated drug efflux can yield a multidrug resistance (MDR) phenotype that is associated with poor response to cancer chemotherapy. Pervilleine F, a new tropane alkaloid aromatic ester obtained from a chloroform extract of the roots of Erythroxylum pervillei as the result of

Evaluation of the cholinergic and adrenergic effects of two tropane alkaloids from Erythroxylum pervillei.

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Pervilleine A is an aromatic ester tropane alkaloid from Erythroxylum pervillei that has shown promising activity as a multidrug resistance inhibitor. Due to its structural similarity with the well known (-)-hyoscyamine and (-)-cocaine, the cholinergic and adrenergic activities of pervilleine A were

Cytotoxic effect of Erythroxylum daphnites extract is associated with G1 cell cycle arrest and apoptosis in oral squamous cell carcinoma.

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Plant-derived molecules showing antineoplastic effects have recently gained increased attention as potential adjuvants to traditional therapies for various cancers. Cerrado biome in Brazil contains high floral biodiversity, but knowledge about the potential therapeutic effects of compounds derived

Modulation of the multidrug-resistance phenotype by new tropane alkaloid aromatic esters from Erythroxylum pervillei.

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Nine tropane alkaloid aromatic esters (1-9) were isolated from the roots of Erythroxylum pervillei by following their potential to reverse multidrug-resistance with vinblastine-resistant oral epidermoid carcinoma (KB-V1) cells. All isolates, including seven new structures (3-9), were evaluated

Radiation induced a supra-additive cytotoxic effect in head and neck carcinoma cell lines when combined with plant extracts from Brazilian Cerrado biome.

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OBJECTIVE Antineoplastic effects of molecules derived from plants have recently gained increasing attention as an additive to traditional therapies. The aim of this study was to evaluate the cytotoxic activity of plant extracts from the Brazilian Cerrado biome associated with radiotherapy in head

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