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baccatin/taxus baccata
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Biosynthesis of taxol: enzymatic acetylation of 10-deacetylbaccatin-III to baccatin-III in crude extracts from roots of Taxus baccata.
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The biosynthesis of taxol is a multistep process. One intermediate reaction is the acetylation of 10-deacetylbaccatin-III (10-DAB) to baccatin-III, an assumed precursor of taxol. Here we describe the cell free acetylation of 10-DAB in crude extracts from roots of Taxus baccata saplings using 14C-or
Effects of immobilization by entrapment in alginate and scale-up on paclitaxel and baccatin III production in cell suspension cultures of Taxus baccata.
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Paclitaxel and baccatin III-producing cells of Taxus baccata were immobilized within Ca(2+)-alginate beads. Under established optimum conditions for the biosynthesis of both taxanes, the yields of paclitaxel and baccatin III in shake-flask cultures of free cells increased by factors of up to 3 and
Inhibition of paclitaxel and baccatin III accumulation by mevinolin and fosmidomycin in suspension cultures of Taxus baccata.
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To achieve a better understanding of the metabolism and accumulation of paclitaxel and baccatin III in cell cultures of Taxus, inhibitors of the early steps in the terpenoid pathway were applied to a cell suspension culture of Taxus baccata: fosmidomycin as an inhibitor of the non-mevalonate branch
Fatal poisoning with Taxus baccata: quantification of paclitaxel (taxol A), 10-deacetyltaxol, baccatin III, 10-deacetylbaccatin III, cephalomannine (taxol B), and 3,5-dimethoxyphenol in body fluids by liquid chromatography-tandem mass spectrometry.
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This method development was to confirm the fatal ingestion of toxic yew plant material in postmortem samples (stomach content, urine, femoral blood, cardiac blood, bile, and brain tissue) collected from a 22-year-old man who committed suicide by ingesting yew leaves. The analytical method was based
[On the contents of the yew tree (Taxus baccata L.). 4. On the structure of baccatin].
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Gene expression profiling in Taxus baccata L. seedlings and cell cultures.
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Limited native resources of paclitaxel from Taxus trees initiated the research to produce this compound by biotechnology. In vitro plant cell culture systems have been used for large-scale production of paclitaxel and related taxanes. In the past decade, several genes involved in the taxane
Screening for pharmaceutically important taxoids in Taxus baccata var. Aurea corr. with CC/SPE/HPLC-PDA procedure.
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Needles of 'the golden yew' Taxus baccata var. Aurea Corr. were extracted with methanol followed by pre-purification of the crude extract and column chromatographic (CC) separation on florisil in gradient mode (an increasing concentration of acetone in dichloromethane). The obtained fractions were
Laser Desorption/Ionisation Mass Spectrometry Imaging of European Yew (Taxus baccata) on Gold Nanoparticle-enhanced Target.
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BACKGROUND
European yew (Taxus baccata) is a plant known to man for centuries as it produces many interesting and important metabolites. These chemical compounds were repeatedly analysed by various analytical techniques, but none of the methods used so far allowed the localisation of the chemical
Immunoenzymatic methods applied to the search for bioactive taxoids from Taxus baccata.
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Polyclonal antibodies raised against 2'-succinyltaxol-bovine serum albumin (BSA) conjugate were used for the immunodetection of bioactive taxoids in chromatographic fractions of the stem bark extract of Taxus baccata. In addition to taxol, cephalomannine, and baccatin III, two taxoids were isolated
Enhanced taxane production and secretion from Taxus baccata cell culture by adding dimethylsulfoxide.
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The ability of an aprotic solvent, dimethylsulfoxide (DMSO), to induce taxane synthesis and release from cell suspension culture of Taxus baccata was examined. The results showed that applying DMSO in optimal conditions not only led to enhancement in taxane excretion from the cells but also led to
Production, purification and characterization of taxol and 10DAB III from a new endophytic fungus Gliocladium sp. isolated from the Indian yew tree, Taxus baccata.
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We have isolated endophytic fungi from Indian yew tree, Taxus baccata and then screened for taxol production. Out of the forty fungal cultures screened, one fungus Gliocladium sp. was found to produce taxol and 10DAB III (10 Deacetyl baccatin III). These compounds were purified by TLC, HPLC and
Eight cases of fatal and non-fatal poisoning with Taxus baccata.
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This paper describes two fatalities, three non-fatal intentional and three accidental oral ingestions of yew (Taxus baccata) leaves. In all cases the post-mortem external examinations showed no signs of violence. Internal examinations revealed small green, needle-like particles on the tongue, in the
Expression of dbat and dbtnbt genes involved in paclitaxel biosynthesis during the growth cycle of Taxus baccata L. callus cultures.
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The time-course of expression of dbat and dbtnbt genes involved in the later steps of paclitaxel biosynthesis and the intracellular taxane accumulation were investigated through a 64-day subculture interval of VI/M1 and VI/M2 Taxus baccata callus cultures. HPLC proved traces of baccatin III and an
Seasonal changes in the concentrations of four taxoids in Taxus baccata L. during the autumn-spring period.
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The concentrations of four common taxoids: baccatin III, paclitaxel, cephalomannine and 10-deacetylbaccatin III (10-DAB III) were measured in fresh needles and stems of Taxus baccata L. during the late autumn-spring period (November'96-April'97) which has not been investigated to date in this
The relationship between TXS, DBAT, BAPT and DBTNBT gene expression and taxane production during the development of Taxus baccata plantlets.
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Taxol and related taxane accumulation in plants is regulated by the expression of genes involved in their biosynthesis. Although the metabolic pathway leading to taxol has been almost completely elucidated, comparatively little is known about the rate-limiting steps and their regulation. In this
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