Objective To observe the antioxidant effect on the proliferation of acute monocytic leukemia cells by establishing its reactive oxygen species(ROS)cell model.Methods U937 cell treated with different concentrations of hydrogen peroxide(H_2O_2)was used to establish ROS cell model.The proliferative cells were treated with various concentrations of antioxidant superoxide dismutase(SOD).We detected cell proliferation,intracellular content of ROS and mitochondrial membrane potential changes.Results(1)Low concentr...