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4 demethyl epipodophyllotoxin/leucemia
Il collegamento viene salvato negli appunti
13 risultati
[Acute leukemia and various hematosarcomas. Trial treatment with a second derivative of podophyllotoxin (4-demethyl-epipodophyllotoxin beta D ethylidene glucoside VP 16213 or EPE)].
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Comparison of uptake and binding of two epipodophyllotoxin glucopyranosides, 4'-demethyl epipodophyllotoxin thenylidene-beta-D-glucoside and 4'-demethyl epipodophyllotoxin ethylidene-beta-D-glucoside, in the L1210 leukemia cell.
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Epipodophyllotoxin VP 16213 in treatment of acute leukaemias, haematosarcomas, and solid tumours.
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Epipodophyllotoxin VP 16213 (4-demethyl-epipodophyllotoxin-beta-D-ethylidene glucoside), given to 250 patients with various types of malignant disease, induced apparently complete remissions in four out of eight cases of acute monocytoid and acute myelomonocytoid leukaemia but only one complete
GP7 can induce apoptotic DNA fragmentation of human leukemia cells through caspase-3-dependent and -independent pathways.
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GP7 (4-[4"-(2",2",6",6"-tetramethyl-l"-piperidinyloxy)amino]-4'-demethyl epipodophyllotoxin), a new spin-labeled derivative of podophyllotoxin, is a promising anticancer drug of podophyllotoxin class. The primary effect of GP7 is the anticancer activity on transplanted mouse tumors and cultured
Reversal of mdr1-mediated multidrug resistance in human leukemia cells by a new spin-labeled derivative of podophyllotoxin.
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GP7 (4-[4"-(2", 2", 6", 6"-tetramethyl-l"-piperidinyloxy) amino]-4'-demethyl epipodophyllotoxin) is a promising anticancer drug of the podophyllotoxin class. However, little is known about its anti-multidrug resistance effects. In the present study, we investigated the effects of GP7 on
A clinical trial of the oral form of 4'-demethyl-epipodophyllotoxin-beta-D ethylidene glucoside (NSC 141540) VP 16-213.
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A clinical trial of the oral form of VP 16-213 (NSC-141540), a semisynthetic podophyllotoxin, was undertaken. In 20 patients, treatment was started at 200 mg/day p.o. for 5 days; courses were repeated after a rest period of 16 days. Five patients were treated at the same dose, repeated with only
[Synthesis and antitumor activities of 4-acylthiol-4-deoxy-4'-demethylepipodophyllotoxin analogues].
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This paper describes the synthesis and antitumor activity of 4-acylthiol-4-deoxy-4'-demethylepipodophyllotoxin analogues. 4-Mercapto-4-deoxy-4'-demethylepipodophyllotoxin prepared from 4'-demethylepipodophyllo-toxin with H2S in the presence of BF3.Et2O, was acylated with different acids using
GP7 induces internucleosomal DNA fragmentation independent of caspase activation and DNA fragmentation factor in NB4 cells.
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DNA fragmentation into internucleosomal fragments is the best recognized biochemical event of apoptosis. Two major caspase pathways have been identified in the signal transduction leading to DNA fragmentation: the receptor pathway and the mitochondrial pathway. DNA fragmentation factor (DFF) has
In vitro test-system for chemo- and thermosensitivity: an analysis of survival fractions and cell-cycle distributions in human Ewing's sarcomas as a modelfor tumors in pediatric oncology.
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BACKGROUND
Tumor cell resistance to anticancer drugs is the primary reason for treatment failure in childhood cancer. Resistance can exist at the onset of treatment or can become clinically apparent under selective pressure of drug exposure. In vitro predictive tests are important for the
Studies in sugar chemistry. VII. Glucuronides of podophyllum derivatives.
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The antitumor activities of several glucuronide methyl esters of podophyllum derivatives were tested in vitro against two human tumor cell lines and their drug resistant sublines. The most active compound studied was methyl (4'-carbobenzoxy-4'-demethyl-epipodophyllotoxin-D-glucopyranoside)uronat e
[Japanese-French cooperation in tumor pharmacotherapy: 1970-1990].
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Since 1970, we have carried out cancer chemotherapy and immunotherapy in cooperation with Japanese scientists, particularly Prof. H. Umezawa, who has generously supplied bleomycin, peplomycin, acalcinomycin A (ACM), THP-adriamycin (THP), neothramycin and bestatin. Malignant tumors curable by
New spin labeled analogues of podophyllotoxin as potential antitumor agents.
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Four new nitroxyl labeled derivatives of podophyllotoxin, 4-(2, 2, 6, 6-tetramethyl-1-oxyl-4-piperidyl)oxy-epipodophyllotoxin (4), 4-(2, 2, 6, 6-tetramethyl-1-oxyl-4-piperidyl)oxy-4'-demethylepipodophyllotoxin (5), 4-(2, 2, 5, 5-tetramethyl-1-oxyl-3-pyrrolinyl)formyloxy-epipodophyllotox in (6) and
Induction of apoptosis through caspase-independent or caspase-9-dependent pathway in mouse and human osteosarcoma cells by a new nitroxyl spin-labeled derivative of podophyllotoxin.
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Previous study has found that a new nitroxyl spin-labeled derivative of podophyllotoxin, 4-[4"-(2",2",6",6"-tetramethyl-1"-piperidinyloxy)amino]-4'-demethyl-epipodophyllotoxin (GP7), can induce apoptosis in human leukemia cells. However, there have been no studies about the effects of GP7 on
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