cephalotaxus/سرطان

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Homoharringtonine: an effective new natural product in cancer chemotherapy.

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Homoharringtonine (HHT) is a cytotoxic alkaloid isolated from the evergreen tree cephalotaxus harringtonia native to the southern provinces of China. The principal mechanism of action of HHT is the inhibition of protein synthesis in a dose- and time-dependent manner by acting on the ribosomes of

Essential oil of Cephalotaxus griffithii needle inhibits proliferation and migration of human cervical cancer cells: involvement of mitochondria-initiated and death receptor-mediated apoptosis pathways.

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This study was conducted to determine the effect of Cephalotaxus griffithii needle essential oil (CGNO) on proliferation and migration of human cervical cancer (HCC) cells. CGNO treatment decreased the viability of all the tested HCC (HeLa, ME-180 and SiHa) cells. Morphological and DNA fragmentation

Molecular modes of action of cephalotaxine and homoharringtonine from the coniferous tree Cephalotaxus hainanensis in human tumor cell lines.

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Homoharringtonine (HHT) is an ester of cephalotaxine (CET), both of which derive from the Chinese coniferous tree Cephalotaxus hainanensis. HHT inhibited tumor cell growth at molar ranges comparable to established cytostatic drugs, whereas CET was 3-4 orders of magnitude less active. Inhibition

Cephalotaxus griffithii Hook.f. needle extract induces cell cycle arrest, apoptosis and suppression of hTERT and hTR expression on human breast cancer cells.

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BACKGROUND Cephalotaxus spp. are known to possess anticancer potential. In this present work, for the first time the effects of C. griffithii needle (CGN) extracts on human cancer cells were examined. METHODS The CGN was successively extracted with petroleum ether (PE), acetone and methanol. The

Comparative in vitro antitumor activity of homoharringtonine and harringtonine against clonogenic human tumor cells.

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Harringtonine and its derivative homoharringtonine are ester-containing anti-leukemic alkaloids isolated from the tree Cephalotaxus harringtonia. In order to compare their antitumor activity against solid tumors, in vitro culture of fresh tumor cells from 23 patients was carried out with a soft agar

Homoharringtonine induces apoptosis and inhibits STAT3 via IL-6/JAK1/STAT3 signal pathway in Gefitinib-resistant lung cancer cells.

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Tyrosine kinase inhibitors (TKIs) are mostly used in non-small cell lung cancer (NSCLC) treatment. Unfortunately, treatment with Gefitinib for a period of time will result in drug resistance and cause treatment failure in clinic. Therefore, exploring novel compounds to overcome this resistance is

Synthesis of antiproliferative Cephalotaxus esters and their evaluation against several human hematopoietic and solid tumor cell lines: uncovering differential susceptibilities to multidrug resistance.

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Deoxyharringtonine (2), homoharringtonine (3), homodeoxyharringtonine (4), and anhydroharringtonine (5) are reported to be among the most potent members of the antileukemia alkaloids isolated from the Cephalotaxus genus. Convergent syntheses of these four natural products are described, each

Phase I clinical investigation of homoharringtonine.

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Homoharringtonine is a cephalotaxine ester derived from Cephalotaxus harringtonia, which is a Chinese evergreen tree. A limited clinical evaluation of this drug in China revealed antileukemic activity, which prompted clinical trials in the United States. We have treated 43 patients with a variety of

New alkaloids and a tetraflavonoid from Cephalotaxus wilsoniana.

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A new homoerythrina alkaloid, C-3-epi-wilsonione (1), a new tetraflavonoid, taiwanhomoflavone C (2), and a new stereoisomer of desmethylcephalotaxinone (3) have been isolated from the leaves and heartwood of Cephalotaxus wilsoniana, respectively. The structures were elucidated by spectroscopic

A novel cytotoxic C-methylated biflavone from the stem of Cephalotaxus wilsoniana.

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Bioassay-directed fractionation of an ethanolic extract of Cephalotaxus wilsoniana has resulted in the isolation of a novel C-methylated biflavone, taiwanhomoflavone-A (1). Its structure was elucidated on the basis of spectroscopic analysis. Taiwanhomoflavone-A is cytotoxic with ED50 values of 3.4,

Alkaloids from Cephalotaxus lanceolata and their cytotoxicities.

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A phytochemical investigation of the branches and leaves of Cephalotaxus lanceolata resulted in the isolation of three new cephalotaxus alkaloids, cephalancetines A, B, and D (1, 2, and 4, resp.), together with ten known alkaloids, 3 and 5-13. The structures of the alkaloids were elucidated on the

Five New Alkaloids from Cephalotaxus lanceolata and C. fortunei var. alpina.

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Five new alkaloids (1-5) were isolated from the leaves and twigs of Cephalotaxus lanceolata and C. fortunei var. alpina along with 24 known alkaloids. The new structures were elucidated based on spectroscopic data including 1D and 2D NMR, FTIR, UV and MS. These new alkaloids showed no cytotoxicity

Anticancer drugs from traditional toxic Chinese medicines.

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Many anticancer drugs are obtained from natural sources. Nature produces a variety of toxic compounds, which are often used as anticancer drugs. Up to now, there are at least 120 species of poisonous botanicals, animals and minerals, of which more than half have been found to possess significant

Biflavone Ginkgetin, a Novel Wnt Inhibitor, Suppresses the Growth of Medulloblastoma.

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Medulloblastoma (MB) is a form of malignant brain tumor that predominantly arises in infants and children, of which approximately 25 % is due to upregulation of canonical Wnt pathway with mainly mutations in CTNNB1. Therefore, Wnt inhibitors could offer rational therapeutic strategies and

Natural products of plant origin as anticancer agents.

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Natural products have been used as effective remedies for the treatment of various ailments. Numerous plant products in the form of decoction, tincture, tablets and capsules have been clinically used for the treatment of different kinds of cancer. This review covers some of the important plants with

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