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taxus wallichiana/rak
Veza se sprema u međuspremnik
Stranica 1 iz 30 rezultatima
Multidrug resistant cancer cells susceptibility to cytotoxic taxane diterpenes from Taxus yunnanensis and Taxus chinensis.
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Twelve taxane diterpenes (1-12), which were isolated previously from the EtOH extract of the aerial parts of Taxus yunnanensis or Taxus chinensis, were evaluated for cytotoxicity against the multidrug resistant cancer cells KB-VIN and KB-7d. Compounds and showed significant cytotoxicity in these
Biosynthesis of Silver Nanoparticles Using Taxus yunnanensis Callus and Their Antibacterial Activity and Cytotoxicity in Human Cancer Cells.
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Plant constituents could act as chelating/reducing or capping agents for synthesis of silver nanoparticles (AgNPs). The green synthesis of AgNPs has been considered as an environmental friendly and cost-effective alternative to other fabrication methods. The present work described the biosynthesis
Anticancer activity and molecular mechanisms of α-conidendrin, a polyphenolic compound present in Taxus yunnanensis, on human breast cancer cell lines.
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α-Conidendrin is a polyphenolic compound found mainly in Taxus yunnanensis, as the source of chemotherapy drug paclitaxel, which has been used in traditional medicine for treatment of cancer. This study aimed to investigate the anticancer activity and molecular mechanisms of α-conidendrin on breast
Endophytic fungi associated with Taxus fuana (West Himalayan Yew) of Pakistan: potential bio-resources for cancer chemopreventive agents.
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BACKGROUND
Endophytic fungi, being a prolific source of bioactive secondary metabolites, are of great interest for natural product discovery.
OBJECTIVE
Isolation and partial characterization of endophytic fungi inhabiting the leaves and woody parts of Taxus fuana Nan Li & R.R. Mill. (Taxaceae) and
Novel taxane derivatives from Taxus wallichiana with high anticancer potency on tumor cells.
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Four novel taxane derivatives, N-debenzoyl-N-methyl-N-heptanoyl-taxol (1), N-debenzoyl-N-me-thyl-N-octanoyl-taxol (2), N-debenzoyl-N-methyl-N-(4-methylhexanoyl)-taxol (3), and N-debenzoyl-N-methyl-N-[(4Z)-1-oxo-4-tenenoyl]-taxol (4), were isolated from the ethanol extract of the whole plant of Taxus
Taxol production by an endophytic fungus, Fusarium redolens, isolated from Himalayan yew.
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Different endophytic fungi isolated from Himalayan Yew plants were tested for their ability to produce taxol. The BAPT gene (C-13 phenylpropanoid side chain-CoA acetyl transferase) involved in the taxol biosynthetic pathway was used as a molecular marker to screen taxol-producing endophytic fungi.
Taxines from the needles of Taxus wallichiana.
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A taxine, 5 alpha O-(3'-dimethylamino-3'-phenylpropionyl) taxinine M (1) together with two known compounds 7-O-acetyltaxine A (2) and 2 alpha-acetoxy-2' beta-deacetylaustrospicatine (3) were isolated from the needles of the Himalayan yew, Taxus wallichiana Zucc. Their structures were elucidated on
Assessment of risk, extinction, and threats to Himalayan yew in Pakistan.
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Himalayan yew (Taxus wallichiana) is in high demand due to the presence of taxol in its bark, needles, and seeds. This metabolite is used for the treatment of breast and ovarian cancer. In addition, Himalayan yew wood is used to prepare slabs (Tabai), coffins (Taabut), for graveyards. Due to
Three new taxane diterpenoids from Taxus sumatrana.
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Phytochemical investigation of taxane diterpenoidal content of an acetone extract of the leaves and twigs of Taxus sumatrana has resulted in the isolation of three new taxoid compounds, tasumatrols E (1), F (2), and G (3) together with 13 known taxanes (5-16). The structures of these taxanes as well
[Studies on the chemical constituents of Taxus yunnanensis].
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The ethanolic extract of the bark of Taxus yunnanensis Cheng et L. K. Fu. showed significant antineoplastic effect on the transplantable tumors in mice. The life survival of P388 leukemic bearing mice was increased (84%) and the growth of B16 melanoma in mice was inhibited (53%). From this extract
abeo-taxane diterpenoids from the Taiwanese Yew Taxus sumatrana.
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Chemical investigation of the acetonic extract of the leaves and twigs of Taxus sumatrana (Taxaceae) led to the isolation of four new taxane diterpene esters, taiwantaxins A-D (1-4, resp.). Their structures were determined primarily on the basis of 1D- and 2D-NMR techniques as well as MS. Compound 1
Growth inhibitory activity of wood of Taxus yunnanensis and its liquid chromatography Fourier-transform mass spectrometry analysis.
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The wood of Taxus yunnanensis (Taxaceae) showed growth inhibitory activities against human cancer cell lines, such as cervical HeLa adenocarcinoma. The morphological changes indicated that the cellular growth inhibitions were caused by apoptosis. To determine the active components, T. yunnanensis
New taxane diterpenoids from the leaves and twigs of Taxus sumatrana.
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Two new taxoids, taxumairol Q (1) and 13-O-acetyl wallifoliol (2), have been isolated from the leaves and twigs of Taxus sumatrana. Taxuspine F and wallifoliol (10) have been isolated for the first time from the yew T. sumatrana. Seventeen known taxoid diterpenoids have also been isolated. The new
Taxanes from Taxus wallichiana var. mairei cultivated in the southern area of the Yangtze River in China.
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A new and 25 known taxane diterpenoids were isolated from the dried whole plants of Taxus wallichiana var. mairei cultivated in the southern area of the Yangtze River in China. The chemical structure of new compound 1, named taxiwallinine, was established by means of MS and NMR analyses. Among the
Synthesis and separation of potential anticancer active dihalocephalomannine diastereomers from extracts of Taxus yunnanensis.
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Two diastereomeric 2",3"-dibromo cephalomannines and their two corresponding 7-epimers were obtained by treatment of extracts of Taxus yunnanensis with bromine solution under mild conditions. Treatment of the same extract with chlorine solution yielded four diasteromeric
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