Effects of miR-125b on HEC1B cell invasion. (A–D) represent photographs of invasive cells on the membrane by transfection vehicle, control miR, pre-miR-125b and anti-miR-125b respectively, magnification, 400×. The membrane was formaldehyde fixed and hematoxylin-stained. Randomly 5 fields were selected to calculate the trans-membrane cells, which represented the invasion ability of HEC1B cells.