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| | Inhibition Assay |
| Description: | To assess the inhibition of the MRP2, MRP3 and BSEP efflux transporters, an in vitro vesicular transporter assay from Solvo Biotechnology Inc. was used. The Test Articles (TAs) (at 0.068, 0.2, 0.62, 1.8, 5.5, 16.7 and 50 uM) were incubated with efflux transporter membrane vesicles (Solvo Biotechnology Inc.) both in the absence and presence of 4 mM ATP to distinguish between transporter mediated uptake and passive diffusion of TA's into the vesicles. In the case of MRP2 and MRP3 transporters reactions were carried out in the presence of 2 mM glutathione. Reaction mixtures were preincubated for ten minutes at 37 C. Reactions were started by the addition of 25 ul of 12 mM MgATP (4 mM final concentration in assay) or assay buffer for background controls. Reactions were stopped by adding 200 ul of ice-cold washing buffer and immediately followed by filtration on glass fiber filters in a 96-well format (filter plate). |
| Affinity data for this assay | |
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