SLCO1B3 and cancer: In particular, amplified expression of OATP1A2, OATP1B1, and OATP1B3 has been found in various cancer tissues,109 which is considered associated with chemosensitivity because of its role in the uptake of several classes of anticancer drugs, such as taxanes, platinum‐based drugs, camptothecin analogs, methotrexate, and some tyrosine kinase inhibitors (TKIs).110, 111