miR-26a did not regulate DAL-1 in lung cancer. (A) Luciferase reporter assay with co-transfection of miR-26a mimic/mimic NC and WT or Mut 3′UTR of DAL-1 in 293T cells. (B) Western blotting results of DAL-1 protein in A549 cells transfected with miR-26a mimic, miR-26a inhibitor and their respective NC at 48 h. (C) Western blotting results of DAL-1 protein in H460 cells transfected with a miR-26a mimic, miR-26a inhibitor and the respective NC at 48 h. DAL-1, differentially expressed in adenocarcinoma of the lung; NC, negative control; miR, microRNA; mut, mutant; UTR, untranslated region.