Antiproliferative activity of arborescidine alkaloids and derivatives
摘要:
Current issues in cancer research involve searching for novel anticancer compounds that can be used to regulate the cell cycle and lead to more effective treatments of tumors. In this study, it was hypothesized that possessing a cyclic alkaloid similar to harmine, arborescidines can disrupt the proliferative state of cancer cells and block the activity of topoisomerases. The antiproliferative activity of arborescidines A-C and their derivatives was evaluated in vitro against four human tumor cell lines: gastric adenocarcinoma, lung cancer, bladder carcinoma and leukemia. Assuming the mechanism of action by topoisomerase II binding model, the compounds possessing the greatest activity had nonpolar side-chain into hydrophobic binding region on the DNA/topo II complex. (C) 2009 Elsevier Masson SAS. All rights reserved.
Antiproliferative activity of arborescidine alkaloids and derivatives
摘要:
Current issues in cancer research involve searching for novel anticancer compounds that can be used to regulate the cell cycle and lead to more effective treatments of tumors. In this study, it was hypothesized that possessing a cyclic alkaloid similar to harmine, arborescidines can disrupt the proliferative state of cancer cells and block the activity of topoisomerases. The antiproliferative activity of arborescidines A-C and their derivatives was evaluated in vitro against four human tumor cell lines: gastric adenocarcinoma, lung cancer, bladder carcinoma and leukemia. Assuming the mechanism of action by topoisomerase II binding model, the compounds possessing the greatest activity had nonpolar side-chain into hydrophobic binding region on the DNA/topo II complex. (C) 2009 Elsevier Masson SAS. All rights reserved.
Novel Supramolecular Palladium Catalyst for the Asymmetric Reduction of Imines in Aqueous Media
作者:Wender A. da Silva、Manoel T. Rodrigues、N. Shankaraiah、Renan B. Ferreira、Carlos Kleber Z. Andrade、Ronaldo A. Pilli、Leonardo S. Santos
DOI:10.1021/ol9011772
日期:2009.8.6
A novel approach to the asymmetric reduction of dihydro-β-carboline derivatives to the corresponding tetrahydro-β-carbolines is described based on the supramolecular lyophilized complex formed from β-cyclodextrin/imines as an enzyme mimetic and palladium hydride as the reducing agent. The methodology allowed us to develop a short and efficient preparation of (R)-harmicine and (R)-deplancheine alkaloids
Bioreduction of β-carboline imines to amines employing Saccharomyces bayanus
作者:Marlene Espinoza-Moraga、Tania Petta、Marco Vasquez-Vasquez、V. Felipe Laurie、Luis A.B. Moraes、Leonardo Silva Santos
DOI:10.1016/j.tetasy.2010.06.036
日期:2010.8
beta-Carboline imine reductions mediated by Saccharomyces bayanus have been described achieving moderate to good enantiomeric excesses of the amine products. The enantiomeric excesses of the bioreduction showed a dependence on the imine substituents. Compounds presenting C-1-C-11 aliphatic substituent groups afforded amines with an (S)-configuration, whereas C-15 and higher aliphatic, and aromatic substituted B-carboline imines achieved inversion of the configuration in the final (R)-2 amine products. Based on this data, a model for the Saccharomyces reduction is proposed. (C) 2010 Elsevier Ltd. All rights reserved.
Antiproliferative activity of arborescidine alkaloids and derivatives
作者:Leonardo S. Santos、Cristina Theoduloz、Ronaldo A. Pilli、Jaime Rodriguez
DOI:10.1016/j.ejmech.2009.04.005
日期:2009.9
Current issues in cancer research involve searching for novel anticancer compounds that can be used to regulate the cell cycle and lead to more effective treatments of tumors. In this study, it was hypothesized that possessing a cyclic alkaloid similar to harmine, arborescidines can disrupt the proliferative state of cancer cells and block the activity of topoisomerases. The antiproliferative activity of arborescidines A-C and their derivatives was evaluated in vitro against four human tumor cell lines: gastric adenocarcinoma, lung cancer, bladder carcinoma and leukemia. Assuming the mechanism of action by topoisomerase II binding model, the compounds possessing the greatest activity had nonpolar side-chain into hydrophobic binding region on the DNA/topo II complex. (C) 2009 Elsevier Masson SAS. All rights reserved.