Deshmukh PS et al. · 2016
Researchers exposed male Fischer rats to microwave radiation for 90 days at 900, 1800, and 2450 MHz to investigate effects on cognitive function, heat shock protein 70 (HSP70) levels, and DNA damage in the brain. Cognitive function was tested using the elevated plus maze and Morris water maze, HSP70 levels were measured by ELISA, and DNA damage was assessed using alkaline comet assay. The results suggest that low-level microwave exposure at these frequencies may lead to hazardous effects on the brain.
Hidisoglu E et al. · 2016
Researchers exposed rats to 2100-MHz electromagnetic fields for 2 hours per day for either 1 or 10 weeks, then recorded visual evoked potentials and measured markers of oxidative stress in the brain. After 1 week of exposure, visual response latencies were shortened and several antioxidant markers were increased. After 1 or 10 weeks, the effects on visual response latencies differed: latencies were shortened in the 1-week group but prolonged in the 10-week group. The researchers concluded that the effects of EMF on visual evoked potentials depend on exposure duration.
Sırav B, Seyhan N · 2016
Researchers used young adult male and female Wistar albino rats to investigate whether pulse modulated 900 MHz and 1800 MHz radio-frequency radiation affects the permeability of the blood-brain barrier. Permeability was measured by quantifying Evans blue dye that passed into the brain after intravenous injection. In both male radio-frequency radiation exposed groups, blood-brain barrier permeability was found to be increased compared with controls, with 1800 MHz found more effective in males. For female rats, 900 MHz exposure was associated with increased permeability, but no statistical difference was found between the 1800 MHz exposed and control groups.
Esmekaya MA et al. · 2016
Researchers studied whether cellular phone radiation affects oxidative stress and nitric oxide levels in mouse brain during epileptic seizures induced by pentylenetetrazole (PTZ). Eight-week-old mice were divided into groups: a PTZ-only control group, a group exposed to 15 minutes of radiation before and 30 minutes after PTZ treatment, and a group exposed to 30 minutes of radiation before and 30 minutes after PTZ treatment. Lipid peroxidation and nitric oxide levels increased significantly in the radiation-exposed groups compared to the control group, while glutathione levels were significantly lower in those same groups.
Şahin D et al. · 2016
The main finding was increased oxidative DNA damage in the brain after 10 days of exposure, while after 40 days oxidative DNA damage was decreased compared to control groups. A decreased level of the lipid peroxidation marker MDA was also observed after 40 days of exposure.
Deshmukh PS et al. · 2016
Researchers exposed rats to cell phone radiation (900 MHz) at extremely low levels for 90 days. The rats developed impaired learning and memory, elevated stress proteins, and DNA damage in brain cells at radiation levels thousands of times below current safety standards.
Boga A, Emre M, Sertdemir Y, Uncu İ, Binokay S, Demirhan O. · 2016
Researchers exposed adult Xenopus laevis frogs to GSM-like radiofrequency electromagnetic radiation at 900 MHz for 8 hours a day over a 5-week period, then measured effects on the embryos produced from different combinations of exposed and unexposed parents. In the control group, 2.2% of embryos were abnormal and none were dead; when only males were exposed, embryo abnormality rose to 3.3% and dead embryos rose to 8.3%. When only females were exposed, abnormal and dead embryo rates each reached 11.7%; when both parents were exposed, dead embryos reached 15% and abnormal embryos reached 11.7%. Offspring of RF-exposed females also showed more aggressive behavior compared with the control group.
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.
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.
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
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.
