Document Report Card

ID: ALA1127678

Journal: J Med Chem

Title: Dianilinophthalimides: potent and selective, ATP-competitive inhibitors of the EGF-receptor protein tyrosine kinase.

Authors: Trinks U, Buchdunger E, Furet P, Kump W, Mett H, Meyer T, Müller M, Regenass U, Rihs G, Lydon N.

Abstract: Dianilinophthalimides represent a novel class of inhibitors of the EGF-receptor protein tyrosine kinase with a high degree of selectivity versus other tyrosine and serine/threonine kinases. Steady-state kinetic analysis of compound 3, which showed potent inhibitory activity, revealed competitive type kinetics relative to ATP. Despite a highly symmetrical structure of compound 3, X-ray studies revealed an unsymmetrical propeller-shaped conformation of the molecule which differs clearly from that of the constitutionally related staurosporine aglycons. These conformational differences may explain the reversal of the selectivity profile of compound 3 relative to the staurosporine aglycons. In cellular assays compounds 3 and 4 have been shown to inhibit EGF-induced receptor autophosphorylation, c-fos induction and EGF-dependent proliferation of Balb/c MK cells. This inhibition was selective as compounds had no effect on PDGF-induced receptor autophosphorylation and c-fos induction. Furthermore, compound 3 showed potent antitumor activity in vivo at well-tolerated doses.

CiteXplore: 8151612

DOI: 10.1021/jm00033a019