Synthesis and evaluation of Strychnos alkaloids as MDR reversal agents for cancer cell eradication.
No Thumbnail Available
Date
2014-01-24
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Natural products represent the fourth generation of multidrug resistance MDR reversal agents that resensitize MDR cancer cells overexpressing P glycoprotein Pgp to cytotoxic agents We have developed an effective synthetic route to prepare various Strychnos alkaloids and their derivatives Molecular modeling of these alkaloids docked to a homology model of Pgp was employed to optimize ligand protein interactions and design analogues with increased affinity to Pgp Moreover the compounds were evaluated for their 1 binding affinity to Pgp by fluorescence quenching and 2 MDR reversal activity using a panel of in vitro and cell based assays and compared to verapamil a known inhibitor of Pgp activity Compound 7 revealed the highest affinity to Pgp of all Strychnos congeners Kd 4 4 M the strongest inhibition of Pgp ATPase activity and the strongest MDR reversal effect in two Pgp expressing cell lines Altogether our findings suggest the clinical potential of these synthesized compounds as viable Pgp modulators justifies further investigation