Water-soluble isoindolo[2,1-a]quinoxalin-6-imines: In vitro antiproliferative activity and molecular mechanism(s) of action
作者:Barbara Parrino、Anna Carbone、Cristina Ciancimino、Virginia Spanò、Alessandra Montalbano、Paola Barraja、Girolamo Cirrincione、Patrizia Diana、Claudia Sissi、Manlio Palumbo、Odra Pinato、Marzia Pennati、Giovanni Beretta、Marco Folini、Peter Matyus、Balázs Balogh、Nadia Zaffaroni
DOI:10.1016/j.ejmech.2015.03.005
日期:2015.4
Water-soluble isoindoloquinoxalin (IIQ) imines and the corresponding acetates were conveniently prepared from the key intermediates 2-(2'-aminophenyl)-2H-isoindole-1-carbonitriles obtained by a Strecker reaction between substituted 1,2-dicarbaldehydes and 1,2-phenylenediamines. Both series were screened by the National Cancer Institute (Bethesda, MD) and showed potent antiproliferative activity against a panel of 60 human tumor cell lines. Several of the novel compounds showed GI(50) values at a nanomolar level on the majority of the tested cell lines. Among IIQ derivatives, methoxy substituents at positions 3 and 8 or/and 9 were especially effective in impairing cell cycle progression and inducing apoptosis in cancer cells. These effects were associated to IIQ-mediated impairment of tubulin polymerization at pharmacologically significant concentrations of tested compounds. In addition, impaired DNA topoisomerase I functions and perturbation in telomere architecture were observed in cells exposed to micromolar concentrations of IIQ derivatives. The above results suggest that IIQ derivatives exhibit multi-target cytotoxic activities. (C) 2015 Elsevier Masson SAS. All rights reserved.