9 полученные результаты
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
Background Omacetaxine mepesuccinate is indicated in adults with chronic myeloid leukemia resistant and/or intolerant to ≥ 2 tyrosine kinase inhibitor treatments. This phase I study assessed the disposition, elimination, and safety of (14)C-omacetaxine in patients with solid tumors. Methods The
Four analogs of cephalotaxine esters (C1Z, C2E, C3E, C4E) were synthesized. The ratio of the Z, E isomers of the side chain alpha, beta-unsaturated ester carboxylic acids is reported. The Z isomer was easy to transform to the E isomer. Compound C1Z showed significant activity of inducing cancer cell
Four new and clinically relevant antineoplastic natural products are reviewed. Taxol is derived from the bark of the western yew. It promotes the formation of microtubule bundles which deform the cytoskeleton and interfere with mitosis. Although phase II efficacy testing is incomplete, taxol is
Twenty-two new esters of natural (-)-cephalotaxine with synthetic acids possessing widely divergent structural features have been synthesized. Murinichloroethyl carbonate (27) esters of cephalotaxine are the most active of this group; this activity is less than that of harringtonine and other
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
Homoharringtonine (HHT) is a potent myelosuppressive agent and has antitumor activity. Recent studies suggest that it inhibits tumor growth by inducing apoptosis. HHT is an ester of the alkaloid cephalotaxine. It is isolated from genus Cephalotaxus. At least ten HHT analogs have been identified from
Cephalotaxine-type alkaloids are the anti-cancer components in twigs, leaves, roots and seeds of Cephalotaxus fortunine. It is very important to use the limited resource by finding an efficient purification technology of the alkaloids. Separation of cephalotaxine-type alkaloids in Cephalotaxus
Homoharringtonine (HHT), a natural cephalotaxine alkaloid, has been used in the People's Republic of China for treatment of leukemia for >3 decades. Here, we employed magnetic Fe3O4 nanoparticles (MNP-Fe3O4) to improve the therapeutic effect of HHT and investigated its biological effects. Within a