No effects of 900 MHz and 1800 MHz electromagnetic field emitted from cellular phone on nocturnal serum melatonin levels in rats.
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Date
2005-06-30
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Abstract
In this study the effects of exposure to a 900 MHz and 1800 MHz electromagnetic field EMF on serum nocturnal melatonin levels of adult male Sprague Dawley rats were studied Thirty rats were used in three independent groups 10 of which were exposed to 900 MHz 10 of which were exposed to 1800 MHz and 10 of which were sham exposed control The exposures were performed 30 min day for five days week for four weeks to 900 MHz or 1800 MHz EMF Control animals were kept under the same environmental conditions as the study groups except with no EMF exposure The concentration of nocturnal melatonin in the rat serum was measured by using a radioimmunoassay method There were no statistically significant differences in serum melatonin concentrations between the 900 MHz EMF group and the sham exposed group P 0 05 The values at 12 00 pm were 39 11 6 5 pg mL in the sham exposed group and 34 97 5 1 pg mL in the 900 MHz EMF exposed group Also there were no statistically significant differences in serum melatonin concentrations between the sham exposed group and the 1800 MHz EMF exposed group P 0 05 The values at 12 00 pm were 39 11 6 5 pg mL in the sham exposed group and 37 96 7 4 pg mL in the exposed group These results indicate that mobile phones emitting 900 and 1800 MHz EMF have no effect on nocturnal serum melatonin levels in rats