Bile acid transporter inhibition has been shown to be an important mechanism of drug-induced liver injury (DILI), but the biophase responsible for the transporter inhibition is unclear. While the free-drug hypothesis would suggest that only unbound drug can inhibit bile acid transporters, there has been success in predicting bile acid transporter inhibitormediated DILI with DILIsym (1,2), which uses total drug concentration to represent the transporter inhibition. The role of intracellular protein binding of bile acids is also unclear.
The goal of the current simulation work was to investigate the impact of drug and bile acid binding kinetics on BSEP inhibition using a mechanistic QSP model.
2018 AAPS Annual Meeting PharmSci 360, November 4-7, 2018, Washington, DC
By Guncha Taneja, Grant Generaux, Brett A. Howell, Jeffrey L. Woodhead