Synthesis, biochemical and molecular modelling studies of antiproliferative azetidinones causing microtubule disruption and mitotic catastrophe
作者:Niamh M. O’Boyle、Miriam Carr、Lisa M. Greene、Niall O. Keely、Andrew J.S. Knox、Thomas McCabe、David G. Lloyd、Daniela M. Zisterer、Mary J. Meegan
DOI:10.1016/j.ejmech.2011.07.039
日期:2011.9
The structure-activity relationships of antiproliferative beta-lactams, focusing on modifications at the 4-position of the beta-lactam ring, is described. Synthesis of this series of compounds was achieved utilizing the Staudinger and Reformatsky reactions. The antiproliferative activity was assessed in MCF-7 cells, where the 4-(4-ethoxy)phenyl substituted compound 26 displayed the most potent activity with an IC(50) value of 0.22 mu M. The mechanism of action was demonstrated to be by inhibition of tubulin polymerisation. Cell exposure to combretastatin A-4 and 26 led to arrest of MCF-7 cells in the G2/M phase of the cell cycle and induction of apoptosis. Additionally, mitotic catastrophe for combretastatin A-4 and for 26 was demonstrated in breast cancer cells for the first time, as evidenced by the formation of giant, multinucleated cells. (C) 2011 Elsevier Masson SAS. All rights reserved.
Lead identification of conformationally restricted β-lactam type combretastatin analogues: Synthesis, antiproliferative activity and tubulin targeting effects
作者:Miriam Carr、Lisa M. Greene、Andrew J.S. Knox、David G. Lloyd、Daniela M. Zisterer、Mary J. Meegan
DOI:10.1016/j.ejmech.2010.09.033
日期:2010.12
The synthesis and study of the structure–activityrelationships of a series of rigid analogues of combretastatinA-4 are described which contain the 1,4-diaryl-2-azetidinone (β-lactam) ring system in place of the usual ethylene bridge present in the natural combretastatin stilbene products. The 1,4-diaryl-2-azetidinones are unsubstituted at C-3, or contain methyl substituent(s) at C-3. The most potent