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A significant number of organic carboxylic acids have been shown to influence the absorption and distribution of drugs mediated by organic anion transporters(OATs). In this study, uptake experiments were performed to assess the inhibitory effects of cinnamic acid, ferulic acid, oleanolic acid, deoxycholic acid, and cynarin on hOAT1, hOAT3, hOATP1B1, and hOATP2B1. After a drug-drug interaction(DDI) investigation, cinnamic acid, ferulic acid, deoxycholic acid, and cynarin were found and validated to inhibit hOAT1 in a competitive manner, and deoxycholic acid was found to be an inhibitor of all four transporters. The apparent 50% inhibitory concentrations of cinnamic acid, ferulic acid, deoxycholic acid, and cynarin were estimated to be 133.87, 3.69, 90.03 and 6.03 μmol L 1for hOAT1, respectively. The apparent 50% inhibitory concentrations of deoxycholic acid were estimated to be 9.57 μmol L 1for hOAT3, 70.54 μmol L 1for hOATP1B1, and 168.27 μmol L 1for hOATP2B1. Because cinnamic acid, ferulic acid, and cynarin are ingredients of food or food additives, the present study suggests there are new food-drug interactions to be disclosed. In addition, deoxycholic acid may be used as a probe for studying the correlation of OATs and OATPs.
A significant number of organic carboxylic acids have been shown in influence the absorption and distribution of drugs mediated by organic anion transporters (OATs). In this study, uptake experiments were conducted to assess the inhibitory effects of cinnamic acid, ferulic acid, oleanolic acid, deoxycholic acid, and cynarin on hOAT1, hOAT3, hOATP1B1, and hOATP2B1. After a drug-drug interaction (DDI) investigation, cinnamic acid, ferulic acid, deoxycholic acid, and cynarin were found and validated against hAT1 in a competitive manner, and The apparent 50% inhibitory concentrations of cinnamic acid, ferulic acid, deoxycholic acid, and cynarin were estimated to be 133.87, 3.69, 90.03 and 6.03 μmol L 1 for hOAT1, respectively. The deoxycholic acid was found to be an inhibitor of all four transporters. apparent 50% inhibitory concentrations of deoxycholic acid were estimated to be 9.57 μmol L 1 for hOAT3, 70.54 μmol L 1for hOATP1B1, and 168.27 μmol L 1for hOATP2B1. Because cinnamic acid , ferulic acid, and cynarin are ingredients of food or food additives, the present study suggests there are new food-drug interactions to be disclosed.