Figure 6.

INA-UV treatment inhibits the calcein efflux of MRP1 expressing cells. The loading of calcein by 293/MRP1 and 293 cells was assessed by FACS analysis. A. Histogram of the calcein fluorescence of 293/MRP1 cells treated or not with 50 μM INA-UV or 40 μM verapamil. B. Histogram of the calcein fluorescence of 293 cells treated or not with 50 μM INA-UV or 40 μM verapamil.