Megha K et al. · 2012
Researchers exposed male Fischer-344 rats to 900 MHz and 1800 MHz microwave radiation for 30 days at 2 hours per day to evaluate oxidative stress, cognitive impairment, and inflammation in the brain. Compared with sham-exposed animals, microwave-exposed rats showed significant impairment in cognitive function and oxidative stress in brain tissues. A significant increase in the cytokines IL-6 and TNF-alpha was also observed following microwave exposure.
Nazıroğlu M et al. · 2012
Researchers divided rats into four groups: a cage control, a sham control, a group exposed to 2.45 GHz electromagnetic radiation, and a group exposed to the same radiation while also receiving melatonin. The radiation-exposed groups received that exposure for 60 minutes per day for 30 days, after which brain cortex and dorsal root ganglion samples and EEG recordings were collected. Lipid peroxidation, cell viability, and cytosolic calcium values in dorsal root ganglion neurons were higher in the radiation-only group than in the control groups. The melatonin-plus-radiation group showed lower EEG spike numbers and higher brain cortex vitamin E concentration compared with the radiation-only group.
Yang XS, He GL, Hao YT, Xiao Y, Chen CH, Zhang GB, Yu ZP. · 2012
Researchers exposed adult male Sprague-Dawley rats to a 2.45 GHz electromagnetic field at a specific absorption rate of 6 W/kg, or to sham conditions, then examined gene and protein expression in the hippocampus. Of 2048 candidate genes examined, 23 were upregulated and 18 were downregulated. Two heat shock proteins, HSP27 and HSP70, stood out because their expression levels were increased in the rat hippocampus. The researchers concluded that their data provide direct evidence that exposure to electromagnetic fields elicits a stress response in the rat hippocampus.
Fournier NM, Mach QH, Whissell PD, Persinger MA. · 2012
Pregnant Wistar rats were continuously exposed to one of four intensities of a complex magnetic field throughout gestation. Exposure to weaker or stronger intensities of the same field pattern did not interfere with hippocampal development or fear behavior.
Korpinar MA, Kalkan MT, Tuncel H. · 2012
Anxiety and stress-related behavioral changes were investigated by elevated plus-maze and hole-board systems. In the elevated plus-maze, exposed rats spent proportionally less time on open arms than control rats (0.12±0.08 versus 0.34±0.18, p <0.01), while hole-board results showed no statistically significant differences between the two groups.
Rauš S, Selaković V, Radenović L, Prolić Z, Janać B. · 2012
Researchers studied how an extremely low frequency magnetic field affects motor behaviour in 3-month-old Mongolian gerbils that had undergone global cerebral ischemia. After a 10-minute blockage of both common carotid arteries, gerbils were continuously exposed to ELF-MF at 50 Hz and 0.5 mT for 7 days, and their behaviour was monitored on days 1, 2, 4, 7, and 14 after reperfusion. Ischemia alone caused significant increases in locomotion, stereotypy, and rotations, along with decreased immobility, up to day 4 after reperfusion compared to control gerbils. ELF-MF exposure inhibited ischemia-induced motor hyperactivity throughout the observation period, though significantly only in the first 2 days after reperfusion.
Rageh MM, El-Gebaly RH, El-Bialy NS. · 2012
Researchers exposed newborn rats continuously to a 50 Hz, 0.5 mT extremely low-frequency magnetic field for 30 days, starting when the rats were 10 days old. DNA damage in brain cells, measured by comet assay, was significantly higher in the exposed group. Exposure was associated with a significant four-fold increase in micronucleus induction and about a three-fold increase in mitotic index in bone marrow cells. Exposed rats also showed significantly higher levels of MDA and SOD, while ELF-MF failed to alter the activity of GSH.
Tasset I et al. · 2012
Researchers investigated the neuroprotective effects of extremely low-frequency electromagnetic fields (ELFEF) in a rat model of Huntington's disease induced by 3-nitropropionic acid (3NP). Rats were given 3NP over four consecutive days at 20 mg/kg body weight, and ELFEF at 60 Hz and 0.7 mT was applied over 21 days, starting after the last injection. Rats treated with 3NP showed significant differences in behavior, neurotrophic factor levels, oxidative stress biomarkers, and reduced neuronal density compared with neuronal controls. ELFEF improved neurological scores, enhanced neurotrophic factor levels, and reduced both oxidative damage and neuronal loss in 3NP-treated rats.
Tasset I et al. · 2012
Researchers exposed rats with Huntington's disease-like symptoms to extremely low-frequency electromagnetic fields (60 Hz at 0.7 milliTesla) for 21 days. The EMF exposure improved the rats' neurological function, increased protective brain proteins, and prevented nerve cell death in the brain region most affected by Huntington's disease. This suggests that specific types of EMF exposure might have therapeutic potential for neurodegenerative diseases.
Lu YS, Huang BT, Huang YX. · 2012
Researchers studied reactive oxygen species (ROS) formation and apoptosis in human peripheral blood mononuclear cells (PBMC) exposed to 900 MHz radiofrequency electromagnetic fields at a specific absorption rate of ~0.4 W/kg. ROS was found to play an important role in apoptosis when exposure lasted longer than two hours, with apoptosis induced through the mitochondrial pathway and mediated by activating ROS and caspase-3, and decreasing the mitochondrial potential. The imbalance between antioxidant defenses and ROS formation was associated with about 37% human PBMC death in eight hours.
Megha K et al. · 2012
Researchers exposed rats to cell phone-level microwave radiation (900 MHz) for 2 hours daily over 30 days and found significant brain damage including memory problems, cellular stress, and inflammation. The exposure level was extremely low - about 1,000 times weaker than current safety limits - yet still caused measurable harm to brain tissue. This challenges the assumption that only high-intensity radiation poses health risks.
Misa Agustiño MJ et al. · 2012
Fifty-four adult female Sprague-Dawley rats were individually exposed to 2.45 GHz radiation for 30 minutes in a GTEM cell at non-thermal SAR levels. Ninety minutes after exposure HSP-90 and HSP-70 decreased significantly at SAR values of 0.046±1.10 W/Kg and 0.104±5.10−3 W/Kg. Twenty-four hours after exposure HSP-90 had partially recovered and HSP-70 had recovered completely. There were few indications of lesions in the glandular structure and signs of apoptosis were negative in all radiated animals.
Calabrò E et al. · 2012
Italian researchers exposed human brain-like cells to 1800 MHz microwave radiation (the same frequency used by GSM cell phones) for 2 and 4 hours. They found that this exposure altered the production of heat shock proteins - cellular stress indicators that help protect cells from damage. Specifically, one protective protein (Hsp20) decreased at both exposure times, while another stress protein (Hsp70) increased after 4 hours, suggesting the cells were responding to electromagnetic stress.
Hong MN et al. · 2012
Researchers exposed MCF10A human breast epithelial cells to 1 mT of 60 Hz ELF-MF for 4 hours and measured intracellular ROS level, SOD activity, and GSH/GSSG ratio. The ELF-MF exposed cells showed no statistically significant changes in these parameters compared to incubator controls or sham-exposed cells. In contrast, ionizing radiation exposed cells showed marked changes in ROS level, SOD activity, and GSH/GSSG ratio, and were positive for morphological changes and SA-β-Gal activity.
Kwon MK, Kim SK, Koo JM, Choi JY, Kim DW. · 2012
The study used a double-blind design with 17 EHS and 20 non-EHS volunteers exposed to real and sham RF-EMF sessions. There was no indication that EHS subjects perceive RF-EMFs better than non-EHS subjects. Exposure used a WCDMA module at 1950 MHz with an average power of 24 dBm and a specific absorption rate of 1.57 W/kg for 32 min.
Unknown authors · 2012
Researchers used sixty-four four-month-old male Wistar rats divided into eight groups of eight rats each. Seven groups were exposed to varying dosages of manganese and a 50 Hz magnetic field of approximately 1 mT, while the last group served as a cage control. The study investigated interactions between the magnetic field and manganese and the elements calcium, zinc, magnesium, and phosphorus thought to be involved in caries in rat teeth. Levels of calcium, magnesium, zinc, and phosphorus in the experimental group rats were different from those in the control group.
Unknown authors · 2011
The Health Council of the Netherlands examined whether exposure limits should shift from specific absorption rate to a maximum allowable temperature increase. The council evaluated this change across six criteria including consistency, applicability, and causality. The council concluded that changing the dosimetric quantity would not advance the debate on non-thermal effects from long-duration, low-intensity exposure. The council recommended keeping the current system of basic restrictions and reference levels expressed as SAR and in V/m or µT.
Unknown authors · 2011
The Health Council of the Netherlands examined whether electromagnetic field exposure limits should shift from measuring SAR (specific absorption rate) to measuring temperature increases. They concluded that maintaining current SAR-based limits is preferable and that changing the measurement approach wouldn't resolve scientific debates about non-thermal EMF effects.
Kesari KK, Kumar S, Behari J. · 2011
Researchers exposed 35-day old Wistar rats to a mobile phone for 2 hours per day for 45 days at a specific absorption rate of 0.9 W/Kg. Animals were divided into a sham exposed group and an exposed group, each with 6 animals. The exposed group showed a significant decrease in glutathione peroxidase and superoxide dismutase, and a significant increase in reactive oxygen species. The researchers concluded that these findings on biomarkers are clear indications of possible health implications.
Kesari KK, Kumar S, Behari J. · 2011
Researchers exposed young rats to cell phone radiation (900 MHz) for two hours daily over 45 days. The study found increased harmful molecules and reduced protective antioxidants in brain tissue, suggesting cell phone radiation may cause oxidative stress that could contribute to neurological problems.
Falzone N, Huyser C, Becker P, Leszczynski D, Franken DR. · 2011
Highly motile human spermatozoa were exposed for 1 hour to 900-MHz mobile phone radiation at a specific absorption rate of 2.0 W/kg and examined at various times after exposure. The radiation did not affect the sperm acrosome reaction, but significant reductions were found in sperm head area and acrosome percentage of the head area among exposed sperm compared with unexposed controls. The mean number of zona-bound sperm was 22.8 in exposed samples versus 31.8 in controls, a statistically significant difference (p < 0.05). The researchers concluded that these results could indicate a significant effect of RF-EMF on sperm fertilization potential.
Esmekaya MA, Ozer C, Seyhan N · 2011
Researchers exposed male Wistar albino rats to 900 MHz pulse-modulated RF radiation at a SAR of 1.20 W/kg for 20 minutes per day over three weeks to investigate oxidative damage in multiple tissues. MDA and NOx levels were significantly increased in liver, lung, testis, and heart tissues of the exposed group compared to sham and control groups, while GSH levels were significantly lower in exposed rat tissues. No significant difference was observed between the sham and control groups.
Esmekaya MA, Ozer C, Seyhan N. · 2011
Researchers exposed rats to cell phone radiation (900 MHz) for 20 minutes daily over three weeks. The radiation caused oxidative damage in the heart, lungs, liver, and testicles by increasing harmful molecules while depleting natural antioxidants, suggesting cellular harm from brief daily exposures.
Saygin M, Caliskan S, Karahan N, Koyu A, Gumral N, Uguz A · 2011
Researchers used twelve-week-old male Wistar Albino rats divided into cage control, sham control, and 2.45 GHz EMR groups, with the exposure group receiving 3.21 W/kg for 60 minutes daily over 28 days. The exposed rats showed a significant reduction in Leydig cell numbers compared to cage controls. Spermatogenesis scores differed significantly between groups, and Bax gene and Caspase-8 enzyme levels showed significant changes.
McCarty DE et al. · 2011
