uvaria comperei/cáncer

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Identification of plant extracts sensitizing breast cancer cells to TRAIL.

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Triple-negative breast cancer (TNBC) is an aggressive heterogeneous cancer subgroup with a higher rate of distant recurrence and a poorer prognosis compared to other subgroups. Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is an attractive molecule that induces cell death in

Cytotoxic and cytostatic effects of four Annonaceae plants on human cancer cell lines.

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Several species of the Annonaceae plants have been used as complementary medicine for cancer-associated illnesses in some ethnic groups of northern Thailand. This study investigated the cytotoxic and cytostatic activity of methanolic extracts derived from the stems of these plants, including Uvaria

Antiausterity agents from Uvaria dac and their preferential cytotoxic activity against human pancreatic cancer cell lines in a nutrient-deprived condition.

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Human pancreatic cancer cell lines are known for their inherent tolerance to nutrition starvation, which enables them to survive under a hypovascular (austerity) tumor microenvironment. The search for agents that preferentially retard the survival of cancer cells under low nutrition conditions

(+)-Grandifloracin, an antiausterity agent, induces autophagic PANC-1 pancreatic cancer cell death.

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Human pancreatic tumors are known to be highly resistant to nutrient starvation, and this prolongs their survival in the hypovascular (austere) tumor microenvironment. Agents that retard this tolerance to nutrient starvation represent a novel antiausterity strategy in anticancer drug discovery.

Antioxidative, antimitotic, and DNA-damaging activities of Garcinia kola stem bark, Uvaria chamae root, and Olax subscorpioidea root used in the ethnotherapy of cancers.

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Garcinia kola (GK) stem bark, Uvaria chamae (UC) root, and Olax subscorpioidea (OS) root are components of various indigenous/traditional anticancer regimens. It is, therefore, possible that they might combat oxidative stress and impair cellular proliferation linked to carcinogenesis. In this study,

Three indigenous plants used in anti-cancer remedies, Garcinia kola Heckel (stem bark), Uvaria chamae P. Beauv. (root) and Olax subscorpioidea Oliv. (root) show analgesic and anti-inflammatory activities in animal models.

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BACKGROUND Phytochemicals with anti-oxidative and anti-inflammatory properties are known to inhibit tumour initiation, promotion and progression. Hence, there is an increasingly-convincing rationale for employing remedies containing those phytochemicals in the treatment of cancers and also as

[Study on the polyoxygenated cyclohexenes from Uvaria boniana].

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Seven new polyoxygenated cyclohexenes, named uvaribonol A-G (1-7) have been isolated from the ethanol extract of the stems of Uvaria boniana Finet. (Annonaceae), and their structures, including the absolute configuration, were determined by spectral and chemical methods. In vitro cytotoxicity test

Uvaridacols E-H, highly oxygenated antiausterity agents from Uvaria dac.

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Chemical investigation of the stems of Uvaria dac yielded four new highly oxygenated cyclohexene derivatives named uvaridacols E-H (1-4). Their structures were established through NMR and circular dichroism spectroscopic analysis. Uvaridacols E (1), F (2), and H (4) displayed weak preferential

Highly oxygenated antiausterity agents from the leaves of Uvaria dac.

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From the chloroform extract of the leaves of Uvaria dac, four new highly-oxygenated cyclohexene derivatives named uvaridacols I-L (1-4) were isolated together with nine previously reported compounds (5-13). Their structures were determined based on the extensive NMR spectroscopic data and circular

A new lignan glycoside from the aerial parts and cytotoxic investigation of Uvaria rufa.

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Chemical investigation of the aerial parts of Uvaria rufa (Dunal) Blume collected from Vietnam yielded one new lignan glycoside, ufaside (1), along with six known compounds, oxoanolobine (2), ergosta-4,6,8(14),22-tetraen-3-one (3), catechin (4), epicatechin (5), daucosterol (6) and glutin-5-en-3-one

[Alkaloids and anthraquinones from branches and leaves of uvaria kurzii].

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OBJECTIVE To investigate the chemical constituents of the branches and leaves of Uvaria kurzii. METHODS The compounds were isolated and purified by silica gel and Sephadex LH-20 column chromatographic methods. Their chemical structures were elucidated on the basis of physicochemical properties and

Liver carcinogenesis in tropical Africa.

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The geographical pathology of hepatocellular carcinoma (HCC) was essentially anecdotal until systematic cancer registration was introduced, but it is now clear that sub-Saharan Africa is a high-incidence area. The disease is multifactorial in etiology, the possible etiological agents including

[Studies on new cytotoxic annonaceous acetogenins from Uvaria grandiflora and absolute configurations].

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Two new cytotoxic annonaceous acetogenins, named uvarigrin(1) and uvarigrandin A(3), were obtained from the roots of Uvaria grandiflora Roxb(Annonaceae). Based on X-ray analysis and Mosher's methodology, the overall absolute configuration of 1 was established as 15S, 17R, 18R, 21R, 22R, 36S. The

[Amides from the stems of Uvaria kweichowensis].

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Uvaria kweichowensis is a folk nongovernmental herb used to treat cure inflammation and tumour in the Southwest area of China. During the course of our investigation for antitumour agents from the stems of Uvaria kweichowensis, six amides were obtained by means of solvent extraction, chromatography

Antimalarial polyoxygenated cyclohexene derivatives from the roots of Uvaria cherrevensis.

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Three new polyoxygenated cyclohexene derivatives named cherrevenisyls A and B (1 and 2), and ellipeiopsol E (3), along with fifteen known compounds, were isolated from the roots of Uvaria cherrevensis. Their structures were determined by spectroscopic methods including 2D NMR techniques and mass

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