Superoxide dismutase activity in the skin of rats irradiated by He-Ne laser

The activity of the enzyme superoxide dismutase has been measured in the skin of rats irradiated by a lowpower He−Ne laser. The irradiation was performed at the doses of 4, 8 and 20 J/cm2 in a single or repeated treatment. The increase in activity of superoxide dismutase in the skin of irradiated animals was not statistically significant.