Isabel López et al. · 2021
Spanish researchers surveyed 268 residents living near nine cell phone towers in Madrid and measured electromagnetic radiation levels in their homes. People exposed to higher radiation levels experienced significantly more headaches, nightmares, dizziness, and sleep problems. The neighborhood also showed cancer rates 10 times higher than the Spanish national average.
Hardell & Carlberg · 2021
This 2021 analysis by Hardell and Carlberg examines historical patterns of delayed cancer prevention, focusing on radiofrequency radiation from wireless devices. The researchers found increasing brain tumor rates in Sweden, particularly among 20-39 year olds, coinciding with widespread wireless phone adoption. They argue that current safety standards ignore non-thermal biological effects and call for proper health evaluation before 5G deployment.
Unknown authors · 2021
This comprehensive review examined research on how non-ionizing electromagnetic fields (including cell phone radiation and power line frequencies) affect genes and DNA in living cells and animals. The majority of studies found that EMF exposure can damage DNA and alter gene expression, with effects occurring at radiation levels similar to everyday public exposure from phones and wireless devices.
Kim et al · 2021
Korean researchers analyzed 18 studies covering 4,280 sperm samples to examine how mobile phone use affects male fertility. They found that exposure to radiofrequency radiation from phones consistently reduced sperm motility (movement), viability (survival), and concentration. Surprisingly, longer phone usage didn't make the damage worse, suggesting even minimal exposure can harm sperm quality.
Panagopoulos et al · 2021
This 2021 review study examined how human-made electromagnetic fields from power lines and wireless devices can damage DNA in cells. The researchers found that EMFs disrupt voltage-gated ion channels in cell membranes, leading to cellular imbalance and DNA damage through increased free radicals. This mechanism helps explain how EMF exposure may contribute to cancer and other health problems.
Bertagna et al · 2021
This systematic review analyzed 22 studies examining how electromagnetic fields affect ion channels in nerve cells. Researchers found that EMF exposure consistently disrupts calcium balance in neurons, with effects varying based on frequency, exposure time, and tissue properties. The findings suggest that ion channels serve as key pathways through which EMFs influence brain and nervous system function.
Unknown authors · 2021
This study investigated how different modes of extremely low-frequency electromagnetic fields (ELF-EMFs) at 15 Hz/2 mT affect long-term potentiation (LTP) at hippocampal synapses in rat brain slices. The researchers found that all three modes tested (sinusoidal, single-frequency pulse, and rhythm pulse) inhibited LTP in a time-dependent manner, with continuous sinusoidal fields producing the strongest inhibitory effect.
Unknown authors · 2021
Researchers tested whether extremely low frequency electromagnetic fields (ELF-EMFs) affect brain learning and memory by comparing EMF exposure to direct electrical current in rat brain tissue. Both EMF exposure and tiny electrical currents reduced long-term potentiation (LTP), a key process for learning and memory formation. The study suggests EMF effects aren't solely due to the electrical currents they induce in brain tissue.
Xia P, Zheng Y, Dong L, Tian C · 2021
Researchers exposed rat brain tissue to extremely low-frequency electromagnetic fields (ELF-EMF) and found it disrupted normal learning and memory processes in the hippocampus. The EMF weakened the brain's ability to strengthen connections between neurons while making it easier to weaken those connections. The study identified the specific biological pathway responsible, involving calcium channels and an enzyme called calcineurin.
Shuo T et al. · 2021
This study exposed male Wistar rats to static magnetic fields (SMF) at varying intensities (50-200 mT) for 1 hour daily over 15 days and measured effects on brain glucose metabolism, enzyme expression, behavior, and brain tissue. Moderate and high-intensity SMF exposure induced intensity-dependent changes in glucose metabolism, decreased expression of rate-limiting metabolic enzymes (HK1 and PFK1), reduced exploratory behavior in open field tests, and caused pathological changes including neuronal pyknosis and edema.
Unknown authors · 2021
Researchers exposed rats to 50 Hz electromagnetic fields at 3 millitesla (similar to industrial equipment) and found significant damage to brain cells in the substantia nigra region. The EMF exposure increased harmful oxidative stress and damaged cell membranes and protective myelin sheaths, but vitamin E supplementation reduced these harmful effects.
Unknown authors · 2021
Researchers crushed the sciatic nerves of rats and then exposed some to low-frequency pulsed electromagnetic fields (2 Hz, 0.3 mT) for 4 hours daily over 40 days. They found PEMF accelerated nerve recovery in the first two weeks, with better electrical signals and walking function, but offered no advantage in longer-term healing. This suggests that PEMF therapy may help only during early-stage nerve repair.
Unknown authors · 2021
Researchers examined 15 studies linking workplace exposure to extremely low-frequency magnetic fields (like those from power lines and electrical equipment) with amyotrophic lateral sclerosis (ALS), a fatal neurological disease. The analysis found these studies were too different in methods to draw firm conclusions, but showed enough promise to justify a major pooled study. Eight research teams agreed to share their original data for better analysis.
Unknown authors · 2021
Iranian researchers exposed human gastric cancer cells to 50 Hz electromagnetic fields at power levels similar to everyday appliances (0.2 and 2 milliTesla). The EMF exposure reduced cancer cell viability and altered the expression of microRNAs, which are molecules that regulate gene activity. These changes persisted for 36 hours after exposure ended, suggesting EMFs can influence cellular behavior at the molecular level.
Xu C, Feng S, Yu Y, Zhang Y, Wei S · 2021
This study investigated how exposure to near-null magnetic fields affects fruit growth in Arabidopsis plants, examining the role of cryptochrome proteins and gibberellin hormones. Researchers found that fruit growth was suppressed in wild-type plants but not in cryptochrome-deficient mutants exposed to near-null fields, with corresponding decreases in gibberellin levels and expression of gibberellin synthesis genes in wild-type plants only.
Unknown authors · 2021
This 2021 study investigated how pulsed electromagnetic field (PEMF) therapy at varying frequencies affects bone mass and microarchitecture in an osteoporotic mouse model. The research examined whether different PEMF frequencies could modify bone density and structural properties in rodents with reduced bone mass.
Unknown authors · 2021
Researchers exposed buffalo embryos and reproductive cells to pulsed electromagnetic fields (30 μT for 3 hours) and found the treatment improved embryo development rates by 20% while reducing cell death. The EMF exposure also changed the activity of genes controlling cell growth and development in ways that appeared beneficial.
Unknown authors · 2021
Researchers exposed mouse sperm stem cells to 50 Hz electromagnetic fields (like power lines) and found it caused oxidative damage and cell death. However, protective molecules called exosomes from neighboring Sertoli cells could reverse this damage. The study suggests EMF exposure harms male reproductive cells, but natural protective mechanisms exist.
Mustafa E, Luukkonen J, Makkonen J, Naarala J · 2021
Finnish researchers exposed mouse blood cells to 50 Hz magnetic fields (the same frequency as power lines) at 200 µT for various durations. They found that longer exposures disrupted genes related to sleep cycles and reduced the cells' ability to repair DNA damage from toxic chemicals.
Unknown authors · 2021
Researchers exposed gastric cancer cells and normal cells to extremely low frequency magnetic fields at different strengths for 18 hours. The magnetic fields decreased cancer cell survival while increasing normal cell survival, and changed the expression of NOTCH1, a gene involved in cancer growth. This suggests ELF magnetic fields might selectively target cancer cells while protecting healthy tissue.
Lv Y, Chen S, Zhu B, Xu H, Xu S, Liu W, Shen Y, Zeng Q · 2021
Researchers exposed three types of human cells to 50 Hz magnetic fields (the same frequency as electrical power systems) at various intensities for up to 24 hours, then used a sensitive DNA damage marker called gamma H2AX to look for breaks in the DNA strands. They found no significant DNA damage at any exposure level or duration tested. This adds to the body of research examining whether the extremely-low-frequency fields from power lines and electrical systems can directly break DNA.
Jeong H, Jo Y, Yoon M, Hong S · 2021
This study examined whether thymidine could mitigate DNA damage and apoptosis caused by tumor-treating fields (TTFields), which use alternating electric fields for cancer treatment. Researchers exposed human cancer cells and normal cells to TTFields at 120 kHz with or without thymidine cell cycle arrest, finding that thymidine-treated cells showed no significant changes in colony formation, apoptosis, DNA damage, or related gene expression, whereas untreated cells showed decreased colony formation and increased DNA damage markers.
Unknown authors · 2021
Researchers exposed human gastric cancer cells to extremely low-frequency electromagnetic fields at two different strengths (0.2 and 2 mT) for 18 hours. The stronger exposure reduced cancer cell viability and altered the expression of BCL2 (a protein that helps cancer cells survive) and two microRNAs that regulate it. This suggests ELF-EMF may affect how cancer cells respond to their normal genetic controls.
Int J Mol Sci 22(12):6438, 2021 · 2021
This study investigated how pulsed electromagnetic fields (PEMF) combined with piezoelectric scaffolds made from polycaprolactone-tricalcium phosphate coated with polyvinylidene fluoride (PVDF) affect bone cell growth and mineralization in MC3T3-E1 cells. The researchers found that PEMF at 0.6 mT and 50 Hz significantly enhanced cell proliferation, PVDF coating enhanced mineralization, and the combination of both PEMF and piezoelectric coating most effectively promoted late-stage osteogenic gene expression.
Unknown authors · 2021
Researchers tested whether electromagnetic fields could help overcome chemotherapy resistance in aggressive brain cancer cells. They found that combining 50 Hz EMF exposure with the drug temozolomide killed more cancer cells and reduced their ability to spread. The electromagnetic fields appeared to make the chemotherapy more effective by changing how key cancer-related genes and proteins behaved.
