Résumé
Objective To study the effect of static magnetic fields on the micronucleus in polychromatic erythrocytes(PCE) in the bone marrow and and the lipid peroxidation in the brain tissue in mice.Methods Fourty Kunming mice were randomly divided in to the negative control group,positive control group(cyclophosphamide:145 mg/kg) and the static magnetic fields(20,40,50,60,80 and 100 mT) exposure group,exposed twice a day,for two hours each time.After 15 days,the micronuclei rate of the bone marrow,blood cells and the activity of superoxide dismutase(SOD),the protein malonaldehyde(MDA) were determined.Results Compared with the control,the micronuclei rate in 50,60,80 and 100 mT exposure group increased significantly,the amount of leukocyte significantly decreased,the activity of SOD in the brain tissue in 60,80 and 100 mT exposure group decreased and the content of MDA increased significantly.Conclusion The present experiment demonstrats that static magnetic fields exposure at doses of 50,60,80 and 100 mT may induce the micronuclei rate increase,the amount of leukocyte decrease,the activity of SOD in the brain tissue decrease and the content of MDA increase.