HMGA2 and small cell lung carcinoma: To test this hypothesis, we cotransfected SCLC cells (SK‐MES‐1 and H226) with miR‐541‐mimics and lenti‐HMGA2 (miR‐541/lenti‐HMGA2 cells), and the control cells were cotransfected with miR‐541 and lenti‐control (miR‐541/lenti‐control cells).