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The effects of chronic exposure of mice to a 900-1900 MHz electromagnetic field (2G) on testes should be investigated.
21-days-old mice were divided into the following groups (n=3 each): exposure to the electromagnetic field for 1) 30, 2) 60, 3) 90, 4) 120, 5) 150 and 6) 180 days. For each exposure group, a separate sham exposure group (n=3 mice each) was used. Mice were sacrificed 24 hours after the end of exposure, respectively.
生殖系への影響: testis histology and blood testosterone level
intermittent 2 minutes every half an hour (total of 48 minutes per day) for 30 days
cages with a temperature of 22 ± 1°C and 60% relative humidity
18 mice were exposed in a cage; cell phone was placed under cage roof at a distance of 5 cm to the floor; phone was put in non-vibrating, silent, do not disturb (DND) and auto answer activated mode and was rung upon from another cell phone
生殖系への影響: testis weight and volume (water displacement method)
形態学/組織学的変化: testes histology (density, diameter and Johnson testicular biopsy score count of seminiferous tubules, number of Sertoli cells/tubule, number of Leydig cells; hematoxylin-eosin stain, microscopy)
Body weight was significantly reduced after 30, 60 and 120 days of exposure (groups 1, 2 and 4), mean testis weight was significantly reduced in all exposure groups except for group 4 and the mean testis volume was significantly reduced in groups 1-3 compared to sham exposed mice. In histological analysis, the mean density of seminiferous tubules was significantly lower in all exposure groups except for group 1, the mean seminiferous tubule diameter was significantly reduced in all exposure group except for group 2, and the numbers of Sertoli cells/tubule and Leydig cells was significantly reduced in all exposure groups compared to the sham exposure groups. For Johnson testicular biopsy score count and testosterone level all exposure groups were pooled and a significantly reduced serum testosterone level and mild histological changes compared to sham exposed animals were found. The authors conclude that chronic exposure of mice to a 900-1900 MHz electromagnetic field (2G) might have detrimental effects on testes histology and function with possible consequences for fertility.