Direct and quantitative evaluation of the major human CYP contribution (fmCYP) to drug clearance using the in vitro Silensomes™ model.

1. We have applied the concept of using MBIs to produce CYP-Silensomes to quantify the contribution of the major CYPs to drug metabolism (fmCYP). 2.

Direct and quantitative evaluation of the human CYP3A4 contribution (f) to drug clearance using the in vitro SILENSOMES model.

1. Among the different in vitro studies recommended by the regulatory agencies, no gold-standard model can easily and directly measure the quantitative CYP450 contributions to drug biotransformation. In this article, we propose an original strategy, called Silensomes, to produce human liver microsomes silenced for one specific CYP450, thanks to specific mechanism-based inhibitors (MBI).

Effect of cryopreservation on the activity of OATP1B1/3 and OCT1 in isolated human hepatocytes.

Drug metabolism in liver is the major pathway for xenobiotic elimination from the body. Access to intracellular metabolising enzymes is possible through passive diffusion of lipophilic drugs through cell membrane or active uptake of more polar drugs by specific uptake transporters. Organic Anion Transporting Polypeptides (OATP/SLCO) and Organic Cation Transporters (OCT/SLC22A) are among the most important transporters involved in xenobiotic transport into hepatocytes.