RT Journal Article SR Electronic T1 Development of SGC-GAK-1 as an orally active in vivo probe for cyclin G associated kinase through cytochrome P450 inhibition JF bioRxiv FD Cold Spring Harbor Laboratory SP 629220 DO 10.1101/629220 A1 Christopher R. M. Asquith A1 James M. Bennett A1 Lianyong Su A1 Tuomo Laitinen A1 Jonathan M. Elkins A1 Julie E. Pickett A1 Carrow I. Wells A1 Zengbiao Li A1 Timothy M. Willson A1 William J. Zuercher YR 2019 UL http://biorxiv.org/content/early/2019/05/07/629220.abstract AB SGC-GAK-1 (1), a potent, selective, cell-active chemical probe for cyclin G associated kinase (GAK), was rapidly metabolized in mouse liver microsomes by P450 mediated oxidation. 1 displayed rapid clearance in mice, limiting its utility for in vivo studies. All chemical modifications of 1 that improved metabolic stability led to a loss in GAK activity. However, pretreatment of liver microsomes with the irreversible cytochrome P450 inhibitor 1-aminobenzotriazole (ABT) decreased intrinsic clearance of 1. Coadministration of ABT also greatly improved plasma exposure of 1 in mice, supporting its use as a chemical probe to study the in vivo biology of GAK inhibition.