THE ACTIVATING ACTION OF LOW LEVEL HELIUM NEON LASER RADIATION ON MACROPHAGES IN THE MOUSE MODEL
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A two-part in vivo and in vitro study is described to assess the effects of helium neon laser radiation on the mouse macrophage. In the first in vivo section 36 mice were used, divided into three groups: two helium neon (HeNe) laser irradiation groups, and the unirradiated control group. For the HeNe groups, the area over the liver or spleen of the mouse was irradiated with the HeNe laser at an energy density of 3,82 J/cm2. After irradiation, in all three groups, a Chinese calligraphic ink solution (containing a high concentration of pure carbon particles) was injected into the veins in the tail, and clearance of the carbon particles from the blood was assayed. It was demonstrated that the clearance of carbon granules increased in those animals who had HeNe LLLT. In the second section of the study, peritoneal macrophages were irradiated in vitro using the HeNe laser at a range of doses (3.1 J/cm2, 21.8 J/cm2 and 46.8J/cm2, The amount of lysozyme (48 animals in four groups: control plus three laser) and activity of acid phosphatase in the lysosomes (72 animals in four groups) were found to be statistically markedly higher in the laser-irradiated solutions than in the controls, especially at the two higher energy densities. The results indicated that the HeNe laser may exert an activating influence upon the immune response of the mononuclear macrophage system both in vivo and in vitro, and that additionally the degree of the influence is dose-related,
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