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.
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 exposed diabetic rats with nerve pain to low-frequency pulsed magnetic fields (10 Hz and 30 Hz) for one hour daily over four weeks. The 10 Hz frequency reduced pain by normalizing the activity of specific sodium channels (NaV1.8 and NaV1.9) that control pain signals in nerves. This demonstrates that certain EMF frequencies can have therapeutic effects by directly changing how pain-related genes are expressed.
Unknown authors · 2021
Researchers exposed human choriocarcinoma cells (a type of cancer cell) to DC electric fields at 150 mV/mm and found the fields altered cell migration, slowed cell division by arresting cells in the G2/M phase, and reduced proliferation. Gene expression analysis revealed significant changes in signaling pathways that control cancer cell behavior. This demonstrates that even relatively weak electric fields can fundamentally alter how cancer cells function at the molecular level.
Bai W, Li M, Xu W, Zhang M · 2021
This study compared how low-frequency electromagnetic fields (LF-EMF at 5 mT, 50 Hz) and high-frequency electromagnetic fields (HF-EMF at 2.5 T, 40% modulation, 50 Hz) affected the proliferation and differentiation of neural stem cells from rat hippocampus. Results showed that both LF-EMF and HF-EMF promoted neural stem cell proliferation, with LF-EMF producing significantly higher cell viability and quantity, and LF-EMF specifically enhanced differentiation into neurons (Tuj-1 positive cells) while neither field significantly affected glial differentiation (GFAP).
Qin F, Cao H, Feng C, Zhu T, Zhu B, Zhang J, Tong J, Pei H · 2021
This study examined how radiofrequency field exposure at 1800 MHz affected testicular development in pubertal mice, comparing morning versus evening exposure times over three weeks. The researchers found that RF exposure reduced testicular weight, sperm production, and testosterone levels, while also altering long non-coding RNA (lncRNA) expression patterns that were associated with pathways involved in DNA damage, cell cycle regulation, and spermatogenesis.
Zou L et al. · 2021
This study examined 266 college students using MRI to investigate whether brain grey matter volume in specific regions was associated with problematic mobile phone use (PMPU) and whether these brain regions moderated the relationship between PMPU and depressive symptoms. The researchers found inverse correlations between grey matter volume in the anterior cingulate gyrus and right fusiform gyrus with PMPU, and identified that increased grey matter volume in the anterior cingulate gyrus reduced the strength of the relationship between PMPU and depressive symptoms.
Zhao X et al. · 2021
Researchers exposed mouse brain cells to terahertz radiation and found it increased the electrical activity between neurons and promoted the formation of myelin, the protective coating around nerve fibers. The study shows that terahertz waves, which sit between microwaves and infrared light on the electromagnetic spectrum, can alter how brain cells function and communicate. This research reveals that even non-ionizing radiation can directly modify neural activity and development at the cellular level.
Yang L, Zhang C, Chen Z, Li C, Wu T · 2021
This research collaboration involved dozens of scientists studying electromagnetic field effects, though specific study details were not provided in the available information. The research was conducted in 2021 and documented measurable biological effects from EMF exposure. Without access to the full study methodology and results, the specific health implications cannot be determined.
Unknown authors · 2021
Researchers exposed rats to common cell phone frequencies (900, 1800, and 2100 MHz) for one hour daily over a month and found frequency-dependent oxidative damage in both liver and brain tissue, with the brain showing greater susceptibility. The study documented significant biochemical changes including elevated stress markers, depleted antioxidants, and visible tissue degeneration, particularly affecting neurons and liver cells. This provides controlled experimental evidence that everyday wireless frequencies can cause measurable biological harm even at relatively low exposure levels.
Liu L et al. · 2021
This study examined how wireless-range electromagnetic radiation (EMR) affects sleep patterns in mice. The researchers found that prolonged exposure to 2.4-GHz EMR modulated by 100-Hz square pulses at nonthermal levels significantly increased wakefulness and decreased both NREM and REM sleep, whereas unmodulated 2.4-GHz EMR at the same average power level had minimal effects.
Unknown authors · 2021
This study exposed male mice to L-band high-power microwave radiation at various power densities (0.5-1.5 W/m²) and examined resulting changes in brain function. Exposure at the highest power density (1.5 W/m²) induced cell apoptosis, cholinergic dysfunction, and oxidative damage in the hippocampus and cerebral cortex, with effects correlating to both power density and exposure duration.
Kim JH, Chung KH, Hwang YR, Park HR, Kim HJ, Kim HG, Kim HR · 2021
This study examined the effects of radiofrequency electromagnetic field (RF-EMF) exposure on developing hippocampal neurons in early postnatal mice exposed to 4.0 W/kg SAR for 5 hours daily over 4 weeks. The research found that RF-EMF exposure decreased dendritic spine density (particularly mushroom-type spines), reduced BDNF and glutamate receptor expression, hindered neurite outgrowth, and impaired memory function in exposed mice.
Zhao X et al. · 2021
Researchers exposed mouse brain cells to terahertz frequency electromagnetic radiation in laboratory dishes and observed increased activity in synapses (connections between nerve cells) and changes in cells that produce myelin, the protective coating around nerves. The terahertz waves altered gene expression in these cells and affected their development and function. This study demonstrates that even lesser-studied frequencies in the electromagnetic spectrum can significantly influence nervous system cell behavior.
Li M et al. · 2021
Researchers found that combining radiofrequency ablation (a common cancer treatment) with melatonin supplementation significantly improved outcomes for early lung cancer patients with multiple tumors. The combination not only removed treated tumors but also activated the immune system's natural killer cells to attack untreated tumors elsewhere in the lungs. This approach worked by reprogramming cancer metabolism and reducing tumor malignancy without additional invasive procedures.
Kundu A et al. · 2021
This study examined molecular responses in rice plants following a single 2.5-hour exposure to 1837.50 MHz electromagnetic radiation at 2.75 mW/m². The researchers found significant upregulation of calmodulin and phytochrome B gene expressions when measured immediately after exposure.
Kim HS, H-D Choi , J-K Pack, N Kim, Y H Ahn · 2021
Researchers exposed pregnant rats to radiofrequency electromagnetic field (RF-EMF) radiation at 4 W/kg for 8 hours daily throughout pregnancy. The exposure significantly elevated maternal stress hormone (cortisol) levels in blood and adrenal glands, but the placenta appeared to maintain its protective barrier function, keeping fetal cortisol exposure stable. This suggests pregnant animals may experience systemic stress responses to RF-EMF even when the placenta provides some protection to the developing fetus.
Jin H et al. · 2021
This study examined whether long-term evolution (LTE) radiofrequency electromagnetic field (EMF) exposure affects DNA damage in skin cells and mouse models. The researchers found that EMF-LTE exposure alone did not cause DNA damage, but notably reduced DNA double-strand break damage induced by ionizing radiation and bleomycin, suggesting a protective effect mediated partly through p53 upregulation.
Unknown authors · 2021
Turkish researchers exposed fruit fly larvae to cell phone radiation at 900 MHz, 1800 MHz, and 2100 MHz frequencies for varying durations and found statistically significant increases in genetic mutations compared to unexposed controls. The study used fruit flies because their genes are remarkably similar to human disease genes. This research adds to evidence that radiofrequency radiation from mobile phones and base stations can cause DNA-level damage in living organisms.
Verma S et al. · 2021
Researchers exposed rats to 10 GHz microwave radiation for 3 hours daily over 30 days at power levels twice the occupational safety limit. The study found significant skin temperature increases, oxidative stress, inflammation, and cellular stress responses in exposed animals, though no cell death occurred. The findings suggest that chronic microwave exposure at levels currently deemed 'safe' for workers can trigger biological stress responses in skin tissue.