Sun C, Wei X, Fei Y, Su L, Zhao X, Chen G, Xu Z · 2016
Researchers exposed mouse embryonic cells to 1,800 MHz radiofrequency radiation (similar to cell phone signals) at high power levels for 1-12 hours and found it initially caused DNA breaks. However, after prolonged exposure, the cells' DNA repair systems became so active that DNA damage dropped below normal background levels - a phenomenon called hormesis where low doses of a harmful substance trigger beneficial protective responses.
Çeliker M et al. · 2016
Fourteen adult Wistar albino rats were randomly divided into two groups of seven, with the study group exposed continuously for 30 days to a 2100 MHz GSM-like electromagnetic field at 5.4 dBm (3.47 mW) to simulate mobile phone talk mode. Auditory brainstem responses recorded after 30 days did not differ significantly between exposed and control rats. Histopathologic analysis showed increased degeneration signs in the exposed group (p = 0.007), and immunohistochemical analysis revealed an increased apoptotic index (p = 0.002).
İkinci A et al. · 2016
The study began with 24 Sprague-Dawley male rats aged 3 weeks, divided equally into control, sham, and EMF exposure groups. EMF group rats were exposed to 900 MHz EMF for 1 hour daily from postnatal day 21 to 46. Biochemistry showed significantly increased malondialdehyde and glutathione in the EMF group versus control and sham, while catalase and superoxide dismutase were higher in both sham and EMF groups versus control. Light microscopy revealed spinal cord atrophy, vacuolization, myelin thickening, and perikarya irregularities in the EMF group. Transmission electron microscopy showed loss of myelin sheath integrity, invagination into the axon, and broad vacuoles in axoplasm.
Mugunthan N et al. · 2016
Researchers exposed 36 mice to 2G mobile phone radiation for 48 minutes per day over 30 to 180 days. Neuron density was significantly lower in the CA1, CA2, and DGDB regions of exposed mice from the first to sixth month. Neuron density was significantly higher in the CA3 and DGVB regions of exposed mice. Nuclear diameter of neurons was lower in all studied hippocampal regions of exposed mice from the first to sixth month.
Odacı E et al. · 2016
Purkinje cell numbers in the cerebellum of 32-day-old female offspring were significantly lower in the EMF group compared to both control and sham groups. Pathological changes including pyknotic neurons with dark cytoplasm were observed in the EMF group.
Hidisoglu E et al. · 2016
Researchers exposed rats to cell phone-frequency radiation for 1 week versus 10 weeks. Short exposure improved brain function and antioxidant protection, while long exposure caused slower brain responses and oxidative damage. This shows EMF effects depend critically on exposure duration.
Kerimoğlu G, Aslan A, Baş O, Çolakoğlu S, Odacı E. · 2016
Kerimoğlu G et al. · 2016
Eighteen male Sprague Dawley rats aged 21 days were randomly assigned to control, sham, and EMF groups. The EMF group received a 900-MHz field for one hour each day throughout adolescence while the sham group was placed in the same cage without exposure. The EMF-exposed rats had fewer pyramidal neurons, more pyknotic neurons, higher malondialdehyde and glutathione levels, and lower catalase levels than the other groups.
Rostami A et al. · 2016
Researchers exposed male rats to 3 Hz and 60 Hz ELF/EMF using a protocol of two cycles of 2 hours per day for four days with a two-day interval. Immediately after exposure, locomotor activity was significantly lower in both exposed groups compared with sham-exposed rats. The exposure did not change anxiety-like behavior or short-term memory over the following two weeks. Electrophysiological recording showed a significant reduction in locus coeruleus firing rate after two hours of exposure. Proteomic analysis indicated global changes in the whole brain proteome after treatment.
Akdag MZ et al. · 2016
The study used 16 adult male Wistar-Albino rats, with 8 exposed to 2.4 GHz radiation for over a year and 8 sham-exposed. DNA damage in brain, liver, kidney, skin, and testicular tissues was measured using the comet assay as percentage tail DNA. Percentage tail DNA increased in brain, kidney, liver, and skin of exposed rats but the increases were not statistically significant. In contrast, DNA damage in testicular tissue increased significantly (p < 0.01). The authors concluded that long-term 2.4 GHz Wi-Fi exposure does not cause DNA damage in the examined organs except testes, which appear more sensitive.
Safian F et al. · 2016
Researchers exposed mouse 2-cell embryos to EMF (900–1800 MHz) for 30 minutes per day over four days and compared them with unexposed controls. The rate of embryo survival to the blastocyst stage was similar in both groups. However, the percentage of dead embryos at the 2-cell stage was significantly higher in the EMF-exposed group, and loss of cell viability significantly increased in experimental blastocysts.
Reale M et al. · 2016
Researchers exposed SH-SY5Y neuroblastoma cells to 50 Hz/1 mT ELF-EMF for short (1h-3h) and sub-chronic (48 h) periods. Exposed cells showed an increased intracellular 5-hydroxyindoleacetic acid/5-hydroxytryptamine ratio reflecting transmitter synthesis, catabolism, and release. Matrix metalloproteinases involved in neuronal cell death were not significantly altered. The balance between reactive oxygen species generation and elimination, and between pro- and anti-inflammatory cytokines, was maintained. The changes were minor compared to damage expected to underlie neurodegeneration or cognitive impairment.
Liu Q, Si T, Xu X, Liang F, Wang L, Pan S. · 2015
Rats were exposed to 900 MHz electromagnetic radiation at a specific absorption rate of 0.66 ± 0.01 W/kg for 2 h/d, and sperm were examined after 50 days. The percentage of apoptotic sperm cells in the exposure group was significantly increased by 91.42% compared with the control group. Reactive oxygen species concentration in the exposure group was increased by 46.21%, while total antioxidant capacity was decreased by 28.01%. Radiation also decreased the protein and mRNA expression of bcl-2 and increased that of bax, cytochrome c, and caspase-3.
Unknown authors · 2015
D'Angelo C et al · 2015
Researchers studied MCP-1 expression in HaCaT, SH-SY5Y, THP-1, and K562 cells exposed to a sinusoidal EMF at 50 Hz with a flux density of 1 mT (rms). Preliminary results showed that EMF exposure differently modifies MCP-1 expression in different cell types. The authors state that MCP-1 expression needs to be better determined with additional studies using different parameters and exposure times.
D'Angelo C et al · 2015
Italian researchers exposed four different types of human cells to 50 Hz electromagnetic fields (the same frequency as power lines) at 1 milliTesla strength. They found that this exposure changed the production of MCP-1, a protein involved in immune response and inflammation, but the effects varied depending on the cell type. This suggests that power-frequency EMFs can trigger biological responses in human cells, though more research is needed to understand the health implications.
Unknown authors · 2015
Researchers exposed male rats to Wi-Fi radiation (2.4 GHz) for 24 hours daily over 12 months to study reproductive effects. The exposed rats showed increased sperm head defects and reduced sizes of reproductive organs and tissues compared to unexposed controls. This suggests long-term Wi-Fi exposure may harm male fertility.
Megha et al. · 2015
Researchers exposed 24 male Fischer 344 rats to microwave radiation at 900, 1800, and 2450 MHz with specific absorption rates of 0.59, 0.58, and 0.66 mW/kg for 60 days (2 hours per day, 5 days per week). Exposure increased oxidative stress markers malondialdehyde, protein carbonyl, and catalase, while decreasing reduced glutathione and superoxide dismutase. Pro-inflammatory cytokines IL-2, IL-6, TNF-α, and IFN-γ were significantly elevated in exposed rats. Significant DNA damage was observed in the microwave exposed groups compared to sham.
Unknown authors · 2015
Researchers exposed rats to low-intensity microwave radiation at cell phone frequencies (900, 1800, and 2450 MHz) for 60 days and found significant brain damage. The study revealed increased oxidative stress, inflammation, and DNA damage in the hippocampus, with effects becoming more severe at higher frequencies. This suggests that even very low power microwave exposure can harm brain tissue through multiple biological pathways.
Ragy MM · 2015
Researchers exposed rats to 900-MHz electromagnetic radiation (similar to cell phone frequencies) for one hour daily over 60 days and found significant damage to the brain, liver, and kidneys. The exposure increased harmful oxidative stress markers and damaged tissue function, but these effects reversed when the EMF exposure was stopped for 30 days. This suggests that cell phone radiation may cause measurable biological damage that could potentially be reversed with reduced exposure.
Tang J et al. · 2015
Researchers exposed rats to cell phone radiation (900 MHz) for 28 days and found it damaged the blood-brain barrier and impaired memory. The radiation caused brain cells to swell and allowed harmful substances to leak into brain tissue, providing direct evidence of cognitive damage.
Unknown authors · 2015
Researchers exposed transgenic 5xFAD and wild-type mice to 1950 MHz RF-EMF for eight months at a SAR of 5 W/kg, two hours per day, five days per week. The exposure significantly reduced Aβ plaques, APP, and APP carboxyl-terminal fragments in the whole brain including hippocampus and entorhinal cortex, and reduced the Aβ42/Aβ40 ratio in the hippocampus of Tg-5xFAD mice. RF-EMF inhibited parenchymal BACE1 expression and neuroinflammation in the transgenic mice. The treatment rescued memory impairment in the transgenic mice. Gene profiling showed that five Aβ-related genes were significantly altered in transgenic mice, with opposite expression patterns compared with wild-type mice.
Unknown authors · 2015
Researchers exposed Alzheimer's disease mice to 1950 MHz radiofrequency radiation (similar to cell phone frequencies) for 8 months and found it reduced brain plaques and improved memory. The EMF exposure appeared to slow disease progression by decreasing harmful protein buildup and brain inflammation. This unexpected finding suggests certain RF exposures might have protective effects in advanced Alzheimer's cases.
Çiğ B, Nazıroğlu M. · 2015
Researchers exposed MCF-7 breast cancer cells to 900, 1800, and 2450 MHz electromagnetic radiation at distances from 0 to 25 cm for one hour. At distances of 0, 1, and 5 cm, exposed cells showed higher reactive oxygen species, calcium concentrations, apoptosis, and caspase activity compared to controls, while cell viability increased with distance. No statistically significant differences were observed between control cells and those exposed at 20 or 25 cm.
Çiğ B, Nazıroğlu M · 2015
Researchers exposed breast cancer cells to radiation from mobile phones (900 MHz, 1800 MHz) and Wi-Fi (2450 MHz) at various distances for one hour. They found that EMF exposure within 10 cm triggered harmful cellular effects including oxidative stress, calcium overload, and programmed cell death, while distances beyond 10 cm showed no significant effects. This suggests maintaining distance from wireless devices may reduce biological harm.
