germacranolide/kanker

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The germacranolide sesquiterpene lactone neurolenin B of the medicinal plant Neurolaena lobata (L.) R.Br. ex Cass inhibits NPM/ALK-driven cell expansion and NF-κB-driven tumour intravasation.

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BACKGROUND The t(2;5)(p23;q35) chromosomal translocation results in the expression of the fusion protein NPM/ALK that when expressed in T-lymphocytes gives rise to anaplastic large cell lymphomas (ALCL). In search of new therapy options the dichloromethane extract of the ethnomedicinal plant

Texas Native Plants Yield Compounds with Cytotoxic Activities against Prostate Cancer Cells.

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There remains a critical need for more effective therapies for the treatment of late-stage and metastatic prostate cancers. Three Texas native plants yielded three new and three known compounds with antiproliferative and cytotoxic activities against prostate cancer cells with IC50 values in the

Structure-activity relationships among in vivo active germacranolides.

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Nine structurally related germacranolides from Eupatorium semiserratum and Eriophyllum confertiflorum were assayed in two standard tumor systems (PS and KB) to determine the structural features required for in vivo antileukemic activity. The moieties necessary for in vivo activity were found to be

Antitumor agents XXXVIII: Isolation and structural elucidation of novel germacranolides and triterpenes from Elephantopus mollis.

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The ethanolic extract of Elephantopus mollis yielded three novel cytotoxic antitumor germacranolides, molephantin, molephantinin, and phantomolin. The extract also yielded three inactive known triterpenes, beta-amyrin acetate, lupeol acetate, and epifriedelanol, as well as stigmasterol. The

Potentiation of 1,25-dihydroxyvitamin D(3)-induced differentiation of human promyelocytic leukemia cells into monocytes by costunolide, a germacranolide sesquiterpene lactone.

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Costunolide, a germacranolide sesquiterpene lactone that exists in several medicinal plants, is known to be a possible anti-cancer and chemopreventive agent for tumorigenesis. In this report, we investigated the effect of costunolide on cellular differentiation in the human promyelocytic leukemia

Cytotoxic germacranolide sesquiterpene from Inula cappa.

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A new germacranolide, inulacappolide (1), was isolated from the EtOH extract of the whole plant of Inula cappa along with 16 known compounds. The structure of inulacappolide was a rare 1(10)-saturated type of germacran-6,12-olide, identified as

Four new cytotoxic germacranolides from Carpesium divaricatum.

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In a bioassay-guided search for cytotoxic compounds from higher plants of South Korea, four new sesquiterpenes of the germacranolide type, named cardivins A (1), B (2), C (3), and D (4), have been isolated from the aerial parts of Carpesium divaricatum. Structures of these compounds were elucidated

Three New Highly Oxygenated Germacranolides from Carpesium Divaricatum and Their Cytotoxic Activity.

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Three new highly oxygenated (2⁻4), and two known (1 and 5) germacranolides, were isolated from the whole plant of Carpesium divaricatum. The planar structures and relative configurations of the new compounds were determined by detailed spectroscopic analysis. The absolute configuration of 1 was

Cytotoxic germacranolide sesquiterpene lactones from Carpesium triste var. manshuricum.

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Four known germacranolide sesquiterpene lactones, 2alpha,5-epoxy-5,10-dihydroxy-6alpha-angeloyloxy-9beta-isobutyloxy-germacran-8alpha,12-olide (1), 2alpha,5-epoxy-5,10-dihydroxy-6alpha,9beta-diangeloyloxy-germacran-8alpha,12-olide (2, divaricin B),

New Highly Oxygenated Germacranolides from Carpesium divaricatum and their Cytotoxic Activity.

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Eight highly oxygenated germacranolides (1-8) including four new ones (2-5) were isolated from the whole plant of Carpesium divaricatum. The planar structures and relative configurations of the new compounds were determined by NMR experiment and HRESIMS data. The absolute configuration of 1 was

Sesquiterpene lactones as drugs with multiple targets in cancer treatment: focus on parthenolide.

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Sesquiterpene lactones (SLs) constitute a large and diverse group of biologically active plant compounds that possess anti-inflammatory and antitumor activity. The subclass germacranolides is one of the major groups of SLs. It includes parthenolide, a highly cytotoxic SL that is being tested in

Antiproliferative activity of Artemisia asiatica extract and its constituents on human tumor cell lines.

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The extract of Artemisia asiatica herb with antiproliferative activity against four human tumor cell lines (A2780, A431, HeLa, and MCF7) was analyzed by the MTT assay, and bioassay-directed fractionation was carried out in order to identify the compounds responsible for the cytotoxic activity.

Constituents of Paramichelia baillonii: a new antitumor germacranolide alkaloid.

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Paramichelia baillonii has been used by the natives of Northern Thailand for medicinal purposes. Four components have been isolated from the bark of this plant and their structures determined by spectroscopic means. Three of the components had been reported previously: the germacranolide epoxides

Germacranolides from Elephantopus scaber L. and their cytotoxic activities

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Seven undescribed germacranolides, named as scabertopinolide A-G were obtained from whole herbs of Elephantopus scaber L. The determination of their structures was conducted via comprehensive spectroscopic analyses combined with experimental electronic circular dichroism (ECD) spectroscopic data and

Cytotoxic germacranolides from Inula verbascifolia subsp. methanea.

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The aerial parts of Inula verbascifolia subsp. methanea yielded three new epoxygermacranolides, compounds 1-3, in addition to the previously known 9beta-hydroxyparthenolide. The structures of 1-3 have been elucidated on the basis of their spectral data (MS, CD, 1D and 2D NMR) and by quantum

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