Anti-tumor promoting effects of sesquiterpenes from Maytenus cuzcoina (celastraceae)
摘要:
Ten sesquiterpenoids (1-10), with a dihydro-beta-agarofuran skeleton, were isolated from Maytenus cuzcoina (Celastraceae). Their structures were elucidated on the basis of spectral analysis, including homo- and heteronuclear correlations NMR experiments (COSY, ROESY, HMQC and HMBC), and chemical correlations. The compounds have been tested for their inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA), as a test for potential cancer chemopreventive agents. Compounds 1-3, 6 and 7 showed strong inhibitory effects on EBV-EA induction (100% inhibition at 1000 mol ratio/TPA). Their structure-activity relationship is discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.
SAR Studies of Dihydro-β-agarofuran Sesquiterpenes as Inhibitors of the Multidrug-Resistance Phenotype in a <i>Leishmania </i><i>t</i><i>ropica</i> Line Overexpressing a P-Glycoprotein-Like Transporter
作者:Fernando Cortés-Selva、Mercedes Campillo、Carolina P. Reyes、Ignacio A. Jiménez、Santiago Castanys、Isabel L. Bazzocchi、Leonardo Pardo、Francisco Gamarro、Angel G. Ravelo
DOI:10.1021/jm0309699
日期:2004.1.1
sesquiterpenes isolated from the leaves of Maytenus cuzcoina (1-10) or semisynthetic derivatives (11-30) have been tested on a multidrug-resistantLeishmaniatropicaline overexpressing a P-glycoprotein-like transporter to determine their ability to revert the resistance phenotype and to modulate intracellular drug accumulation. Almost all natural compounds showed potent reversalactivity with different degrees
Anti-tumor promoting effects of sesquiterpenes from Maytenus cuzcoina (celastraceae)
作者:Antonio G. González、Benigna M. Tincusi、Isabel L. Bazzocchi、Harukuni Tokuda、Hoyoku Nishino、Takao Konoshima、Ignacio A. Jiménez、Angel G. Ravelo
DOI:10.1016/s0968-0896(00)00107-3
日期:2000.7
Ten sesquiterpenoids (1-10), with a dihydro-beta-agarofuran skeleton, were isolated from Maytenus cuzcoina (Celastraceae). Their structures were elucidated on the basis of spectral analysis, including homo- and heteronuclear correlations NMR experiments (COSY, ROESY, HMQC and HMBC), and chemical correlations. The compounds have been tested for their inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA), as a test for potential cancer chemopreventive agents. Compounds 1-3, 6 and 7 showed strong inhibitory effects on EBV-EA induction (100% inhibition at 1000 mol ratio/TPA). Their structure-activity relationship is discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.