Discovery of 2-Chloro-<i>N</i>-(4-methoxyphenyl)-<i>N</i>-methylquinazolin-4-amine (EP128265, MPI-0441138) as a Potent Inducer of Apoptosis with High In Vivo Activity
作者:Nilantha Sirisoma、Shailaja Kasibhatla、Azra Pervin、Hong Zhang、Songchun Jiang、J. Adam Willardsen、Mark B. Anderson、Vijay Baichwal、Gary G. Mather、Kevin Jessing、Raouf Hussain、Khanh Hoang、Christopher M. Pleiman、Ben Tseng、John Drewe、Sui Xiong Cai
DOI:10.1021/jm8003653
日期:2008.8.1
Using a live cell, high-throughput caspase-3 activator assay, we have identified a novel series of 4-anilinoquinazolines as inducers of apoptosis. In this report, we discuss the discovery of 2-chloro-N-(4-methoxyphenyl)-N-methylquinazolin-4-amine, compound 2b (EP128265, MPI-0441138) as a highly active inducer of apoptosis (EC(50) for caspase activation of 2 nM) and as a potent inhibitor of cell proliferation (GI(50) of 2 nM) in T47D cells. Compound 2b inhibited tubulin polymerization, was effective in cells overexpressing ABC transporter Pgp-1, and was efficacious in the MX-1 human breast and PC-3 prostate cancer mouse models. In contrast to the SAR of 4-anilinoquinazolines as EGFR kinase inhibitors, the methyl group on the nitrogen linker was essential for the apoptosis-inducing activity of 4-anilinoquinazolines and substitution in the 6- and 7-positions of the quinazoline core structure decreased potency.