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To investigate the effects of prenatal exposure to electromagnetic fields on the number of granule cells in the dentate gyrus of rats.
The production and plasticity of new neurons in the dentate gyrus may have an important role in hippocampal functions. Although the production of dentate gyrus granule cells begins prenatally, they are formed at a high rate during the first 20 days after birth. Pregnant rats (n=6) were assigned to a control group and a 900 MHz exposure group. The 4-weeks-old offspring of the control group (n=5) and the exposure group (n=6) was investigated.
|ばく露時間||60 min/day, from the first to the last day of gestation|
|Distance between exposed object and exposure source||1 cm|
|ばく露装置の詳細||12 cm long plastic tube cage with a diameter of 5.5 cm, antenna inside the cage|
Prenatal electromagnetic field exposure caused a decrease in the number of granule cells in the dentate gyrus of the rats compared to the control group. In the exposure group morphology was affected (increased number of granule cells with darkly stained neurons), whereas in the control group the morphology of the granule cells was normal. Both groups showed no significant difference in weight.
The results suggest that prenatal exposure to a 900 MHz electromagnetic field affects the development of the dentate gyrus granule cells in the rat hippocampus.