Electrical Wiring EMF Research

Testicular development evaluation in rats exposed to 60 Hz and 1 mT electromagnetic field

Unknown authors · 2010

Extremely low-frequency electromagnetic fields affect the immune response of monocyte-derived macrophages to pathogens.

Akan Z, Aksu B, Tulunay A, Bilsel S, Inhan-Garip A · 2010

Researchers applied 50 Hz, 1 mT electromagnetic fields for 4 to 6 hours to human monocytic leukemia cells (THP-1) that had been stimulated with Staphylococcus aureus or interferon gamma/lipopolysaccharide. Field application increased nitric oxide levels, with the increase appearing earlier and being more prominent in cells stimulated with S. aureus. ELF-EMF alone caused increased hsp70 levels in a time-dependent manner, and the growth curve of exposed bacteria was lower than the control. The researchers suggested that ELF-EMF could be exploited for beneficial uses.

Extremely low frequency electromagnetic field exposure affects fertilization outcome in swine animal model

Unknown authors · 2010

Involvement of mitochondrial activity in mediating ELF-EMF stimulatory effect on human sperm motility

Unknown authors · 2010

Human sperm were exposed to a 50 Hz, 5 mT ELF-EMF with a square waveform. Exposure increased mitochondrial membrane potential and levels of ATP, ADP, and NAD+ and improved sperm kinematic parameters. Inhibiting oxidative phosphorylation with CICCP blocked the ELF-EMF effect on energy parameters and motility in glucose medium. When pyruvate and lactate replaced glucose, ELF-EMF increased energy status and motility, indicating mitochondrial oxidative phosphorylation mediates the effect.

Bioelectromagnetic field effects on cancer cells and mice tumors

Unknown authors · 2010

Differentiation of K562 Cells Under ELF-EMF Applied at Different Time Courses

Ayşe IG, Zafer A, Sule O, Işil IT, Kalkan T. · 2010

Researchers studied the effect of ELF-EMF on the differentiation of K562 cells at different time courses. A single exposure to ELF-EMF resulted in a decrease in differentiation, while ELF-EMF applied every day for 1 hour caused an increase in differentiation. ELF-EMF increased ROS levels in K562 cells not treated with hemin, but did not change ROS levels in hemin-treated cells, indicating that ROS was not the cause of the differentiation effects.

Effects of extremely low-frequency electromagnetic fields on Helicobacter pylori biofilm

Unknown authors · 2010

Researchers exposed H. pylori ATCC 43629 cultures and 2-day-old biofilm to ELF-EMF at 50 Hz and 1 mT for 2 days. Exposed cultures and sham-exposed controls were studied for cell viability, morphology, biofilm mass, genotypic profile, and luxS and amiA gene expression. During biofilm formation, ELF-EMF exposure significantly increased spiral forms to 58.41% versus 33.14% in controls and reduced biofilm cell mass. On mature biofilm, no significant differences were found compared to controls, though biofilm mass was also reduced. No changes in DNA patterns were recorded, but amiA gene expression was modulated.

Effects of extremely low-frequency magnetic field exposure on cognitive functions: results of a meta-analysis

Unknown authors · 2010

Researchers conducted a meta-analysis of nine studies that met minimum design criteria, all using 50 Hz magnetic field exposure. Small but significant effect sizes were found in two cognitive dimensions: exposed subjects performed better on the hard level of visual duration discrimination but worse on the intermediate level. A significant improvement in correct responses was also observed in the flexibility dimension under exposure. However, the authors caution that the small number of studies per dimension makes the estimates unstable and the findings must be treated with extreme caution. Overall, the meta-analysis provides little evidence that ELF-MFs have any effects on cognitive functions.

Effects of extremely low-frequency magnetic field exposure on cognitive functions: results of a meta-analysis

Unknown authors · 2010

Researchers analyzed 17 studies on how 50 Hz magnetic fields (from power lines and appliances) affect thinking abilities like memory and attention. They found minimal effects - people performed slightly better on some visual tasks but slightly worse on others. Overall, the evidence shows little impact on cognitive function.

Sinusoidal ELF magnetic fields affect acetylcholinesterase activity in cerebellum synaptosomal membranes

Ravera S et al. · 2010

Researchers investigated how extremely low frequency magnetic fields affect acetylcholinesterase (AChE) activity in synaptosomal membranes from the cerebellum. Sinusoidal 50 Hz fields at different amplitudes caused AChE activity to decrease about 27%, with a threshold of about 0.74 mT. The decrease was completely reversible and independent of the time spent in the field. When the synaptosomal membranes were solubilized with Triton, the fields did not affect AChE activity, suggesting the membrane plays a crucial role in the effect.

Sinusoidal ELF magnetic fields affect acetylcholinesterase activity in cerebellum synaptosomal membranes.

Ravera S et al. · 2010

Researchers exposed brain tissue to 50 Hz magnetic fields (power line frequency) and found it reduced activity of a key brain enzyme by 27%. This enzyme controls nerve communication for memory and learning, suggesting power-frequency fields can disrupt basic brain chemistry.

Effect of 2.45 mT sinusoidal 50 Hz magnetic field on Saccharomyces cerevisiae strains deficient in DNA strand breaks repair

Unknown authors · 2010

Researchers exposed wild-type and DNA-repair-deficient Saccharomyces cerevisiae strains to a 2.45 mT, 50 Hz sinusoidal magnetic field for 96 hours. Growth increased significantly in the rad52 strain and nearly significantly in the rad52 hdf1 strain. Survival was lower in all magnetic-field-exposed strains compared with controls, with the overall difference close to statistical significance. Cell cycle progression and DNA patterns were unchanged in all strains after exposure.

The relationship between residential proximity to extremely low frequency power transmission lines and adverse birth outcomes

Unknown authors · 2010

The study analyzed live singleton births in Montréal and Québec from 1990 to 2004 using the Québec birth file. Proximity was defined as residing within 400 meters of a transmission line, and generalized estimating equations assessed associations with preterm birth, low birth weight, small-for-gestational-age birth, and infant sex while adjusting for maternal and neighborhood factors. No association was found for preterm birth, low birth weight, or infant sex, but a lower likelihood of small-for-gestational-age birth appeared for some distance categories such as 50–75 meters compared to 400 meters or more.

Effects of 50-Hz magnetic field exposure on hormone secretion and apoptosis-related gene expression in human first trimester villous trophoblasts in vitro

Unknown authors · 2010

Researchers isolated trophoblasts from first trimester human chorionic villi and exposed them to a 50-Hz magnetic field for different durations. Exposure at 0.2 mT for 72 hours did not affect hCG and progesterone secretion. Exposure at 0.4 mT for 48 hours showed no significant change in hormone secretion. Exposure at 0.4 mT for 72 hours significantly inhibited hCG and progesterone secretion. Apoptosis-related gene expression (bcl-2, bax, caspase-3, p53, fas) did not differ after 72 hours at 0.4 mT.

Effects of 50-Hz magnetic field exposure on hormone secretion and apoptosis-related gene expression in human first trimester villous trophoblasts in vitro

Unknown authors · 2010

Researchers exposed human placental cells from early pregnancy to 50 Hz magnetic fields (the same frequency as power lines) to see if it affected hormone production and cell death. They found that prolonged exposure at higher intensities reduced production of key pregnancy hormones, but didn't trigger cell death pathways.

Effect of exposure to 50 Hz magnetic field with or without insulin on blood-brain barrier permeability in streptozotocin-induced diabetic rats.

Gulturk S et al. · 2010

Rats in the magnetic field groups were exposed to a 5 mT field for 165 minutes every day for 30 days, and all rats underwent Evans blue measurement to evaluate the blood-brain barrier. Diabetes and magnetic field exposure each increased blood-brain barrier permeability, their combination caused a greater increase, and insulin reduced that effect.

Effect of exposure to 50 Hz magnetic field with or without insulin on blood-brain barrier permeability in streptozotocin-induced diabetic rats.

Gulturk S et al. · 2010

Scientists exposed diabetic rats to 50 Hz magnetic fields (from power lines) for three hours daily over 30 days. The magnetic fields increased blood-brain barrier permeability, allowing substances to pass more easily into brain tissue. This matters because a compromised barrier can let toxins reach the brain.

Signal transduction of the melatonin receptor MT1 is disrupted in breast cancer cells by electromagnetic fields

Unknown authors · 2010

Signal transduction of the melatonin receptor MT1 is disrupted in breast cancer cells by electromagnetic fields

Unknown authors · 2010

Researchers exposed breast cancer cells to 50 Hz electromagnetic fields at 1.2 microT (similar to power line levels) for 48 hours and found the EMF completely blocked melatonin's protective anti-cancer effects. Melatonin normally helps suppress breast cancer growth, but the electromagnetic field disrupted the cellular pathways that allow this hormone to work properly.

Brain DNA damage and 70-kDa heat shock protein expression in CD1 mice exposed to extremely low frequency magnetic fields

Unknown authors · 2010

Brain DNA damage and 70-kDa heat shock protein expression in CD1 mice exposed to extremely low frequency magnetic fields

Unknown authors · 2010

Italian researchers exposed mice to 50 Hz magnetic fields at 1 milliTesla (power line frequency) for up to 7 days and found DNA damage in all brain regions immediately after exposure. The DNA damage was reversible, healing within 24 hours after exposure ended, and didn't trigger stress protein responses.

Effects of extremely low-frequency electromagnetic field on fertility and heights of epithelial cells in pre-implantation stage endometrium and fallopian tube in mice

Unknown authors · 2010

Researchers exposed female NMRI mice to 50 Hz, 0.5 mT ELF-EMF for 4 hours per day, 6 days a week for 2 weeks. The exposed mice had significantly fewer flushed blastocysts than controls. Fallopian tube epithelial cell height increased significantly in exposed mice, while endometrial epithelial cell height showed an insignificant increase.

Mobile-phone pulse triggers evoked potentials.

Carrubba S, Frilot C 2nd, Chesson AL Jr, Marino AA. · 2010

Researchers tested whether cell phone signals can trigger measurable brain responses by exposing 20 volunteers to the low-frequency pulse pattern (217 Hz) that cell phones emit. They found that 90% of participants showed detectable brain activity changes (called evoked potentials) in response to these pulses, suggesting the brain can sense and respond to cell phone signals even when people aren't consciously aware of it.

Repeated exposure to low-level extremely low frequency-modulated microwaves affects cortex-hypothalamus interplay in freely moving rats: EEG study.

Vorobyov V, Janać B, Pesić V, Prolić Z. · 2010

Researchers studied EEG in 10 freely moving rats with electrodes implanted in the cortex and dorsomedial hypothalamus over five consecutive days. Rats were exposed to ELF-MW (915 MHz, 20-ms pulse duration, approximately 0.3 mW/cm(2), 4 Hz) intermittently (1-min 'On', 1-min 'Off') for 10 min several times per day. Baseline EEG showed dominant activity in the 3.2-6.0 Hz and 17.8-30.5 Hz ranges in the cortex, and in the 6.0-17.8 Hz range in the hypothalamus. ELF-MW exposure increased beta(2) activity in the hypothalamus more than in the cortex, significantly reducing the initial cortical-hypothalamic EEG imbalance. A cumulative effect was observed across repeated exposures.

Effect of long-term exposure to a randomly varied 50 Hz power frequency magnetic field on the fertility of the mouse

Unknown authors · 2010