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Updated: Apr 28, 2026

Homogeneous Time-resolved Förster Resonance Energy Transfer-based Assay for Detection of Insulin Secretion
Published on: May 10, 2018
Discovery of novel insulin-like growth factor-1 receptor inhibitors with unique time-dependent binding kinetics
Meizhong Jin1, Brenda A Petronella1, Andy Cooke1
1OSI Pharmaceuticals, LLC , A wholly owned subsidiary of Astellas US LLC, 1 Bioscience Park Drive, Farmingdale, New York 11735, United States.
Abstract:
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 PD effects in conjunction with tumor growth inhibition in xenograft models at a remarkably low and intermittent dose, which correlated with the observed in vitro slow off-rate properties.
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