Zuo H et al. · 2015
Researchers exposed differentiated PC12 cells to continuous microwave radiation at 2.856 GHz for 5 minutes with an average power density of 30 mW/cm2. After exposure, RKIP was downregulated while the MEK/ERK/CREB signaling pathway was activated excessively. The ratio of Bcl-2/Bax decreased, caspase-3 activity increased, and apoptotic DNA fragmentation increased. The researchers suggested that RKIP may act as a key regulator of neuronal damage caused by microwave radiation.
Danker-Hopfe H et al. · 2015
Researchers conducted a double-blind, randomized, sham-controlled cross-over study to examine whether electromagnetic fields from GSM 900 and WCDMA/UMTS devices affected sleep. Thirty healthy young men between 18 and 30 years old were each exposed three times per exposure condition while their sleep was recorded. The only consistent finding across individuals was an increase of stage R sleep under GSM 900 MHz exposure in 9 of 30 subjects and under WCDMA/UMTS exposure in 10 of 30 subjects.
Tang J et al. · 2015
Researchers exposed 108 male Sprague-Dawley rats to a 900 MHz, 1 mW/cm2 electromagnetic field for 14 or 28 days at 3 hours per day, with some rats left unexposed as a sham group. Rats exposed for 28 days crossed platforms less often and spent less time in the target quadrant than rats exposed for 14 days and unexposed rats. Twenty-eight days of exposure was also associated with cellular edema, neuronal cell organelle degeneration, and albumin and HO-1 extravasation in the hippocampus and cortex. The researchers found that 28 days of EMF exposure induced the expression of mkp-1, resulting in ERK dephosphorylation.
Cao H, Qin F, Liu X, Wang J, Cao Y, Tong J, Zhao H · 2015
Researchers exposed male Sprague Dawley rats to 1.8 GHz radiofrequency fields at different times of day to study whether circadian rhythms of plasma antioxidants were affected. Six groups of animals were exposed at a power density of 201.7 μW/cm2 and a specific absorption rate of 0.05653 W/kg for 2 hours per day for 32 consecutive days, each at a different time of day, while a seventh group served as sham-exposed controls. The circadian rhythms of melatonin, GSH-Px, and SOD were shifted in exposed rats, with levels significantly decreased when exposure was given at 23 and 3 h GMT. The researchers concluded that there may be adverse effects of radiofrequency exposure on antioxidant function, affecting both daily antioxidant levels and circadian rhythmicity.
Wang X et al. · 2015
Researchers exposed Neuro-2a cells to 900 MHz GSM signals at specific absorption rates of 0, 0.5, 1, or 2 W/kg for 24 hours, with or without silencing of the DNA repair enzyme OGG1. Without OGG1 silencing, 2 W/kg RF-EMFs induced oxidative DNA base damage, and with OGG1 silencing, damage was observed at exposures as low as 1 W/kg. Increases in oxidative DNA base damage were accompanied by similar increases in reactive oxygen species, but neither DNA strand breakage nor altered cell viability was observed.
Cao H, Qin F, Liu X, Wang J, Cao Y, Tong J, Zhao H. · 2015
Researchers exposed rats to cell phone-level radiation for 2 hours daily over 32 days. The radiation disrupted natural 24-hour cycles of antioxidant production, with nighttime exposures causing the biggest drops in protective compounds like melatonin. This suggests RF radiation may interfere with the body's internal clock.
Masuda H et al. · 2015
The cortex tissue targeted was locally exposed to 1439 MHz RF using a figure-8 loop antenna at an averaged specific absorption rate of 2.0 W/kg in the target area for 50 min. Three microcirculatory parameters related to cerebral inflammation were measured by the cranial window method in real-time under RF exposure. No extravasation of intravenously injected fluorescent dye was observed during RF exposure. There was no significant difference either in pial venule blood flow velocity or diameter between exposed and sham-exposed rats. Histological evaluation for the brain immediately after RF exposure did not reveal any serum albumin leakage sites or degenerate neurons.
Şahin A et al. · 2015
The study consisted of control, sham-exposed, and EMF-exposed groups with six rats in each. The EMF-exposed group received 900 MHz EMF for 1 hour per day for 30 days while the sham group was placed in the same jar without exposure. Stereological analysis revealed a significantly lower total number of pyramidal neurons in the cornu ammonis of EMF-exposed rats compared to both control and sham groups, and histopathology showed abnormal cells with dark cytoplasm and shrunken morphology.
Bin-Meferij MM, El-Kott AF · 2015
İkinci A et al. · 2015
Researchers exposed young male rats to 900 MHz radiofrequency radiation (similar to cell phone frequencies) for one hour daily during adolescence and examined their spinal cords. They found significant damage including breakdown of the protective myelin sheaths around nerve fibers, increased oxidative stress markers, and structural abnormalities in nerve cells. This suggests that radiofrequency exposure during critical developmental periods may harm the developing nervous system.
Kazemi E et al. · 2015
The study investigated the effect of 900 MHz GSM on oxidative stress and intracellular ROS levels in human mononuclear cells, monocytes, and lymphocytes. Blood samples from 13 healthy volunteers were exposed to RF radiation from a mobile phone simulator for 2 hours, while control samples were not exposed. Mononuclear cells were isolated by density gradient centrifugation and ROS was measured using a CM-H2DCFDA fluorescence probe and flow cytometry. Results showed a significant increase in ROS production in monocyte-rich cell populations after exposure, but no significant change in lymphocyte-rich populations.
Yüksel M, Nazıroğlu M, Özkaya MO. · 2015
Researchers exposed pregnant rats and their offspring to 900, 1800, and 2450 MHz electromagnetic radiation for 60 minutes daily during pregnancy and growth. Uterine lipid peroxidation increased in exposed groups while glutathione peroxidase activity and prolactin levels decreased in developing rats. In maternal rats, plasma prolactin, estrogen, and progesterone decreased while total oxidant status and body temperature increased. No changes occurred in reduced glutathione, total antioxidants, or vitamins A, C, and E in maternal uterine and plasma samples.
Bin-Meferij MM, El-Kott AF. · 2015
Researchers exposed male rats to cell phone radiation (900 MHz) for one hour daily over several weeks and found significant damage to sperm quality, count, and testicular tissue structure. The radiation caused irregular sperm development, cell death, and reduced fertility markers. However, when rats were also given Moringa leaf extract (a plant rich in antioxidants), the protective compounds largely prevented this reproductive damage.
Mugunthan N et al. · 2015
Mice were exposed to 2G and 3G radiation for 48 minutes per day over periods of 30 to 180 days. Exposed mice showed significant reductions in body weight at the first, second, and fourth months, and in testis weight and volume during the first three months. Serum testosterone levels were significantly lower in exposed mice at the first, second, third, fourth, and sixth months, with no significant difference between the 2G and 3G groups. Histological analysis revealed lower seminiferous tubule density and diameter, fewer Sertoli and Leydig cells, and microscopic changes such as wide interstitium, cell detachment, vacuolar degeneration, reduced epithelial thickness, maturation arrest, and Johnson scores of 7 to 9.
Olgar Y et al. · 2015
Researchers exposed rats to 2.1 GHz radiofrequency radiation (similar to cell phone frequencies) for 2 hours daily over 10 weeks and studied heart muscle cells. While basic heart function remained normal, the cells showed reduced responsiveness to stress hormones like adrenaline, and nitric oxide levels increased in heart tissue. This suggests that chronic EMF exposure may impair the heart's ability to respond properly during physical or emotional stress.
Şahin A et al. · 2015
Researchers exposed young rats (equivalent to pre-adolescent humans) to 900-MHz cell phone radiation for one hour daily over 30 days, then examined their brain tissue. They found significant loss of pyramidal neurons in the hippocampus (a brain region crucial for memory and learning) and observed damaged cells with abnormal appearance. This suggests that cell phone radiation exposure during development may harm critical brain cells needed for cognitive function.
Shokri S, Soltani A, Kazemi M, Sardari D, Mofrad FB. · 2015
Three-month-old male Wistar rats (n=27) were exposed to 2.45 GHz radiation in a chamber with two Wi-Fi antennas and divided into a control group and groups exposed for 1 hour or 7 hours per day for two months. Sperm parameters, caspase-3 concentrations, histomorphometric changes of testis, and apoptotic indexes were evaluated. Both exposure groups showed a decrease in sperm parameters in a time-dependent pattern, increased apoptosis-positive cells and caspase-3 activity in seminiferous tubules, and significantly reduced seminal vesicle weight compared to controls.
Malek F, Rani KA, Rahim HA, Omar MH · 2015
The study aimed to determine whether short-term exposure at 1 V/m to typical GSM and UMTS signals affects cognitive performance and physiological parameters. The sample included 200 subjects, with 50.0% reporting idiopathic environmental intolerance attributed to electromagnetic fields (IEI-EMF) and 50.0% non-IEI-EMF. No statistically significant differences were found between real exposure and sham exposure for cognitive performance or physiological effects in either group (P’s > 0.05).
Salunke BP, Umathe SN, Chavan JG. · 2015
Researchers exposed mice to 2.45 GHz HF-EMF for 60 minutes per day for 7 or 30 or 60 or 90 or 120 days. Anxiety-like behavior was assessed with the elevated plus maze, open field test, and social interaction test; OCD-like behavior with marble burying; and depression-like behavior with the forced swim test and tail suspension test. The study found no evidence that HF-EMF exposure produced anxiety, OCD, or depression-like behavior in mice up to 120 days.
Söderqvist F, Carlberg M, Hardell L · 2015
Researchers conducted a single-blinded randomized counterbalanced study with 24 healthy subjects aged 18–30 years who underwent three exposure conditions. The study tested whether microwaves from an 890-MHz phone-like signal at SAR10G of 2 W/kg and 0.2 W/kg versus sham gave acute effects on brain-shielding barriers using blood serum biomarkers. Over time, statistically significant variations were found for TTR and β-trace protein, but no difference was found between exposure conditions and no interaction between exposure condition and time of blood sampling. The study concluded it failed to show any acute clinically or statistically significant effect of short-term microwave exposure on serum levels of S100β, TTR, and β-trace protein with follow-up limited to two hours.
Unknown authors · 2015
Japanese researchers exposed developing rats' brain cortex to 1457 MHz radiofrequency radiation (similar to cell phone frequencies) for 50 minutes at 2.0 W/kg to test blood-brain barrier effects. Using advanced fluorescence microscopy, they found no changes in barrier permeability in either juvenile or young adult rats. The study suggests this specific RF exposure doesn't immediately compromise the protective barrier around the developing brain.
Bin-Meferij MM, El-Kott AF · 2015
Researchers exposed male rats to 900 MHz mobile phone radiation for one hour daily over eight weeks and found significant damage to sperm quality, testicular tissue, and fertility markers. The study also tested whether Moringa oleifera leaf extract could protect against this damage, finding that the antioxidant-rich plant extract significantly prevented radiation-induced reproductive harm.
Bin-Meferij MM, El-Kott AF · 2015
Researchers exposed male rats to 900 MHz mobile phone radiation for one hour daily over eight weeks, finding significant damage to sperm count, motility, and testicular tissue structure. The study also tested whether Moringa oleifera leaf extract could protect against this damage, showing that the plant extract helped preserve sperm parameters and testicular health. This adds to growing evidence that cell phone radiation may impact male fertility.
Dasdag S, Taş M, Akdag MZ, Yegin K. · 2014
The study used Wistar Albino adult male rats divided into a sham group and an exposure group, with rats in the exposure group exposed to 2.4 GHz radiofrequency radiation for 24 hours a day during 12 months. Sperm head defects increased in the exposed group, and weight of the epididymis and seminal vesicles, seminiferous tubule diameter, and tunica albuginea thickness all decreased. Other measured parameters did not show statistically significant differences between the groups.
Ragy MM. · 2014
Researchers exposed male rats to 900-MHz electromagnetic radiation for one hour daily over 60 days, with a withdrawal group that had a 30-day recovery period. Exposure significantly increased malondialdehyde levels and decreased total antioxidant capacity in brain, liver, and kidney tissues. Serum levels of alanine transaminase, aspartate aminotransferase, urea, creatinine, and corticosterone were significantly increased, while catecholamines were not significantly changed. All these alterations were corrected after the withdrawal period.
