miR-7-5p negatively regulated TFF3 protein expression. (A) Quantitative-polymerase chain reaction was performed to determine the expression of miR-7-5p post-transfection of LS174T cells with miR-7-5p mimic or inhibitor. (B) Western blotting was performed to determine the expression of TFF3 protein post-transfection of LS174T cells with miR-7-5p mimic or inhibitor. Results were normalized to GAPDH. *P<0.05 vs. NC cells. NC, cells without transfection; miR-7-5p mimic NC, cells transfected with miR-7-5p mimic NC miRNA; miR-7-5p mimic, cells transfected with miR-7-5p mimics; miR-7-5p inhibitor NC, cells transfected with miR-7-5p inhibitor NC miRNA; miR-7-5p inhibitor, cells transfected with miR-7-5p inhibitor. miR, microRNA; NC, negative control; TFF3, Trefoil factor 3.