Fig. 2

CD73 was a direct target of miR-30a. a Predicted miR-30a target sequences in the 3′-UTR of CD73 and its mutant containing altered nucleotides in the 3′-UTR. b The miR-30a target sequence from CD73 was cloned into the 3′-UTR of a luciferase reporter gene. Seed site mutagenesis was used to control for binding specificity. Luciferase activity was determined by Dual-Luciferase Reporter Assay System. c CD73 protein expression levels in CRC cells infected with miR-30a precursor or miR-30a sponge were determined by western blotting. d CD73 mRNA expression levels in CRC cells infected with miR-30a precursor or miR-30a sponge were determined by qRT-PCR. Error bars represent mean ± SD from three independent experiments. *P < 0.05, **P < 0.01 compared with the NC group. The luciferase reporter assay data were measured in triplicates for each independent transfection experiment