Discovery of Novel Insulin-Like Growth Factor-1 Receptor Inhibitors with Unique Time-Dependent Binding Kinetics
摘要:
This letter describes a series of small molecule inhibitors of IGF-1R with unique time-dependent binding kinetics and slow off-rates. Structure activity and structure kinetic relationships were elucidated and guided further optimizations within the series, culminating in compound 2. With an IGF-1R dissociative half-life (t(1/2)) of >100 h, compound 2 demonstrated, significant and extended pp effects in conjunction with tumor growth inhibition to xenograft models at a remarkably low and intermittent dose, which correlated with the observed in vitro slow off-rate properties.