tacca leontopetaloides/kanser

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[Discovery of Novel Biologically Active Compounds of Natural Origin, with a Focus on Anti-tumor Activity].

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Numerous clinically valuable medicines, including anticancer drugs, have been developed from biologically active natural compounds and their structurally related derivatives. This review discusses novel natural compounds with promising biological activities and those with novel chemical structures.

Plantagiolides I and J, two new withanolide glucosides from Tacca plantaginea with nuclear factor-kappaB inhibitory and peroxisome proliferator-activated receptor transactivational activities.

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A novel withanolide glucoside, plantagiolide I (1), a new withanolide glucoside, plantagiolide J (2), and six known compounds (3-8) were isolated from the whole plant of Tacca plantaginea. Their structures were determined by spectroscopic and chemical methods. Compound 3 significantly inhibited

Bioactive spirostane glycosides from Tacca plantaginea.

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Eight new spirostane glycosides, taccaosides E-L (2-7, 11, and 14), along with 7 known spirostane glycosides were isolated from the extract of the whole plants of Tacca plantaginea (Hance) Drenth. Their structures were established on the basis of physical data, spectroscopic analysis (MS, 1D and 2D

Evelynin, a cytotoxic benzoquinone-type Retro-dihydrochalcone from Tacca chantrieri.

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A new benzoquinone-type retro-dihydrochalcone, named evelynin, was isolated from the roots and rhizomes of Tacca chantrieri. The structure was elucidated on the basis of the analysis of spectroscopic data and confirmed by a simple one-step total synthesis. Evelynin exhibited cytotoxicity against

Taccasubosides A-D, four new steroidal glycosides from Tacca subflabellata.

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By analyzing the steroidal content of fresh whole plants of Tacca subflabellata (Taccaceae), we isolated one sapogenin and eight glycosides with four kinds of steroidal skeletons including four new glycosides, named taccasubosides A-D (1-4), together with five known compounds. Among them, compound 1

Cytotoxic taccalonolides and withanolides from Tacca chantrieri.

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Six new taccalonolides, taccalonolides AT-AY (1-6), and two new withanolides, chantriolides D and E (7 and 8), together with ten known compounds (9-18), have been isolated from whole plants of Tacca chantrieri. The structures, including the absolute configurations of some of the compounds, were

Potent taccalonolides, AF and AJ, inform significant structure-activity relationships and tubulin as the binding site of these microtubule stabilizers.

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The taccalonolides are a class of microtubule stabilizing agents isolated from plants of the genus Tacca. In efforts to define their structure-activity relationships, we isolated five new taccalonolides, AC-AF and H2, from one fraction of an ethanol extract of Tacca plantaginea. The structures were

The taccalonolides: microtubule stabilizers that circumvent clinically relevant taxane resistance mechanisms.

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The taccalonolides are a class of structurally and mechanistically distinct microtubule-stabilizing agents isolated from Tacca chantrieri. A crucial feature of the taxane family of microtubule stabilizers is their susceptibility to cellular resistance mechanisms including overexpression of

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