In in vitro system using Caco-2 cells and recombinant OATP1B1 or OATP1B3 expressing human embryonic kidney 293 cells, both S 033188 and S 033447 are substrates of P-glycoprotein (P-gp), but not substrates of breast cancer resistance protein (BCRP). S-033447 was not substrate of OATP1B1 and OATP1B3.
In inhibitor assessments of S-033188 and S-033447, S-033188 inhibit P-gp and S-033447 inhibit BCRP, OATP1B1, organic cation transporter 1, multidrug and toxin extrusion protein (MATE) 1 and MATE2-K.