42 female rats were divided into 4 groups: 1) exposure to the electromagnetic field for 6 hours/day for one week (n=14), 2) sham exposure for 6 hours/day for one week (n=7), 3) exposure to the electromagnetic field for 3 hours/day for one week (n=14), 4) sham exposure for 3 hours/day for one week (n=7). For histopathological analysis, both sham exposure groups were pooled. All animals were killed on day 9 after the beginning of the exposure.
|Distance between exposed object and exposure source||5 cm|
|Setup||the mobile phone in talk mode was used for exposure; the distance between the antenna of the mobile phone and the head of the animals was 5 cm; during the exposure, animals were immobilized by placing their body in plexiglas restrainers|
|Sham exposure||A sham exposure was conducted.|
There were no significant differences on the insulin level found in the exposure groups (groups 1 and 3) compared to the respective sham exposure groups.
In the liver of animals from group 1 (exposure for 6 h/day), severe infiltration of mononuclear cells into the portal spaces of the hepatic lobules with penetration of the cells into the limiting plate was observed. Only mild mononuclear cellular infiltration in the portal spaces with no penetration into the limiting plates was found in group 3 (exposure for 3 h/day) and no histopathological abnormalities were found in the sham exposure groups.
In the pancreas of animals from group 1, dissociation and in group 3 mild dissociation of most of the Langerhans islets was observed, while there were no histopathological abnormalities found in the sham exposure groups.
The authors conclude that exposure of rats to a 900 MHz electromagnetic field (GSM) could induce histopathological changes in the liver and pancreas. (remark EMF-Portal: This conclusion corresponds to the abstract. The conclusion presented at the end of the article shows no logical association to the rest of the article and does therefore probably not belong to the study).