Although other members of the OATP family are expressed in some types of tumors and can transport antitumor drugs, such as OATP1C1 (SLCO1C1), which transports docetaxel[59], OATP4C1 (SLCO4C1), methotrexate[60], and OATP5A1 (SLCO5A1), satraplatin[61], their role in cancer chemoresistance is poorly understood. The gene discussed is SLCO4C1; the disease is cancer.