Human Endogenous Metabolite
There is a pH-dependent effect on organic anion transporting polypeptide 3A1 (OATP3A1) uptake, with more efficient simvastatin acid uptake at pH5.5 in HEK293 cells transfected with the OATP3A1 gene. The Michaelis-Menten constant (Km) for simvastatin acid uptake by OATP3A1 was 0.017 μM and the Vmax was 0.995 fmol/min/105 cells.