[The influence of pulsed magnetic fields on SOD's activity and MDA value in metabolism of mice].
This experiment aimed to investigate the influence of pulsed extremely-low-frequency-magnetic fields on free radical metabolism of mice. Thirty-two mice were randomly divided into four groups and were exposed to 0 T, 0.25 T, 0.34 T and 0.64 T intensity pulsed magnetic fields of 20 Hz for 40 min. The 0 T exposed group was the control group. The free radical metabolism, SOD's activity and MDA, of mice were measured respectively. The result showed the SOD's activity and MDA of the 0.34 T exposed group were both significantly lower (P < 0.01, P < 0.05) than that of the control group, while the 0.25 T and 0.64 T exposed groups were not significantly different from the control group. This demonstrates that the biological effect of pulsed extremely-low-frequency magnetic fields on free radical metabolism of mice varies and depends on the intensity of the fields. The "window" effect may exist.
Wu
D
D
Laboratory for Free Radical Research, Fourth Military Medical University, Xi'an 710032.
Wang
D
D
Xi
X
X
Li
X
X
Mo
J
J
D000818:Animals; D004574:Electromagnetic Fields; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism*; D051379:Mice; D008805:Mice, Inbred A; D011829:Radiation Dosage; D011897:Random Allocation; D013482:Superoxide Dismutase / Q000378:metabolism*; D014916:Whole-Body Irradiation
D008315:Malondialdehyde; D013482:Superoxide Dismutase