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catharanthine/vinca
Povezava se shrani v odložišče
Stran 1 iz 22 rezultatov
Molecular docking and pharmacogenomics of vinca alkaloids and their monomeric precursors, vindoline and catharanthine.
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Vinblastine and vincristine are dimeric indole alkaloids derived from Catharanthus roseus (formerly: Vinca rosea). Their monomeric precursor molecules are vindoline and catharanthine. While vinblastine and vincristine are well-known mitotic spindle poisons, not much is known about vindoline and
Mechanism of interaction of vinca alkaloids with tubulin: catharanthine and vindoline.
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The interactions of the vinca alkaloid drugs catharanthine and vindoline with tubulin have been investigated and compared with those of vinblastine and vincristine. Both drugs were found to be less effective in bringing about the inhibition of tubulin self-assembly into microtubules than vincristine
A note on the alkaloids of Vinca rosea Linn. (Catharanthus roseus G. Don.). II. Catharanthine, lochnericine, vindolinine, and vindoline.
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Studies on the synthesis of monomeric and dimeric vinca alkaloids. The total synthesis of isovelbanamine, velbanamine, cleavamine, 18 beta-carbomethoxycleavamine, and catharanthine.
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Vinca alkaloids. XVII. Chemistry of catharanthine.
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Simultaneous determination of secondary metabolites from Vinca rosea plant extractives by reverse phase high performance liquid chromatography.
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BACKGROUND
Vinca rosea (Apocynaceae) is one of the most important and high value medicinal plants known for its anticancer alkaloids. It is the iota of the isolated secondary metabolites used in chemotherapy to treat diverse cancers. Several high performance liquid chromatography (HPLC) methods have
Non-antitumor vinca alkaloids reverse multidrug resistance in P388 leukemia cells in vitro.
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Twelve monomeric or dimeric alkaloids from Vinca rosea Linn., which had been reported to have little or no antitumor activity, were investigated to determine their combined effects with either vincristine or daunorubicin on in vitro cell growth of a P388 subline resistant to vincristine and
Aging of tubulin at neutral pH: the destabilizing effect of vinca alkaloids.
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The effect of the vinca alkaloid drugs, vincristine, vinblastine, catharanthine, and vindoline, on the aging process of tubulin has been examined. It was found that addition of vincristine or vinblastine accelerated by a factor of 3-3.5 the transformation of tubulin from the 5.8 S alpha-beta-tubulin
Interactions of vinca alkaloid subunits with chiral amido[4]resorcinarenes: a dynamic, kinetic, and spectroscopic study.
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The stereoselectivity of the reaction between (R)-(-)-2-butylamine and the diastereomeric proton-bound complexes of (+)-catharanthine (C) or (-)-vindoline (V) with some chiral amido[4]resorcinarenes has been investigated in the gas phase by ESI-FT-ICR-MS. The reaction stereoselectivity (0.56 <
DNA binding studies of Vinca alkaloids: experimental and computational evidence.
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Fluorescence studies on the indole alkaloids vinblastine sulfate, vincristine sulfate, vincamine and catharanthine have demonstrated the DNA binding ability of these molecules. The binding mode of these molecules in the minor groove of DNA is non-specific. A new parameter of the purine-pyrimidine
Attempted Synthesis of Vinca Alkaloids Condensed with Three-Membered Rings.
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Our successful work for the synthesis of cyclopropanated vinblastine and its derivatives by the Simmons⁻Smith reaction was followed to build up further three-membered rings into the 14,15-position of the vindoline part of the dimer alkaloid. Halogenated 14,15-cyclopropanovindoline was prepared by
Rapid identification of vinca alkaloids by direct-injection electrospray ionisation tandem mass spectrometry and confirmation by high-performance liquid chromatography-mass spectrometry.
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A simple and rapid method for the identification of Vinca alkaloids from a crude extract of Catharanthus roseus G. Don (Apocynaceae) by direct-injection electrospray ionisation (ESI) and tandem mass spectrometry (MS/MS) has been developed. The alkaloids vindoline, vindolidine, vincristine and
Negative-pressure cavitation extraction of four main vinca alkaloids from Catharanthus roseus leaves.
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In the present study, an improved method termed negative-pressure cavitation extraction (NPCE) followed by reverse phase high-performance liquid chromatography (RP-HPLC) was developed for the extraction and quantification of vindoline (VDL), catharanthine (CTR), vincristine (VCR) and vinblastine
Rapid and simultaneous determination of five vinca alkaloids in Catharanthus roseus and human serum using trilinear component modeling of liquid chromatography-diode array detection data.
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A novel chemometrics-assisted high performance liquid chromatography method coupled with diode array detector (HPLC-DAD) was proposed for the simultaneous determination of vincristine (VCR), vinblastine (VLB), vindoline (VDL), catharanthine (CAT) and yohimbine (YHB) in Catharanthus roseus (C.
Monoclonal antibodies to antitumor Vinca alkaloids: thermodynamics and kinetics.
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Spleen cells from a mouse and a rat immunized with vinblastine coupled to bovine serum albumin were fused in two independent experiments with P3 X 63-Ag8 (non-secreting variant) mouse myeloma cells. Three mouse X mouse (Vinca 1-3) and two rat X mouse (Vinca 4 and 5) hybrids were selected for
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