Observation of hepatocyte apoptosis by TUNEL staining. Cells with nuclei that stained dark brown were considered to be TUNEL positive. A) The control group; B) 25 mg/L MAG group; C) 50 mg/L MAG group; D) 100 mg/L MAG group; E) 200 mg/L MAG group. In the MAG groups, decreased apoptotic cell number was seen compared to the control group. Scale bar=200μm.