Sun LX, Yao K, He JL, Lu DQ, Wang KJ, Li HW. · 2006
Cultured LECs were exposed to 217 Hz modulated 1.8 GHz microwave radiation at specific absorption rates of 0, 1, 2, 3, and 4 W/kg for 2 hours. DNA single strand breaks were detected with comet assay at 0, 30, 60, 120, and 240 minutes after irradiation. At 1 and 2 W/kg, the difference in DNA breaks between exposure and sham exposure groups was not significant at any detection time. At 3 and 4 W/kg, differences were significant immediately and 30 minutes after irradiation, with the difference disappearing after one hour in the 3 W/kg group but persisting in the 4 W/kg group.
Sun LX, Yao K, He JL, Lu DQ, Wang KJ, Li HW. · 2006
Researchers exposed human eye lens cells to cell phone radiation for 2 hours at different power levels. Lower levels caused repairable DNA damage, but higher power (4 W/kg) caused permanent breaks cells couldn't fix, suggesting a threshold where radiation overwhelms natural repair.
Sun LX, Yao K, He JL, Lu DQ, Wang KJ, Li HW. · 2006
Researchers exposed human eye lens cells to cell phone radiation for 2 hours at different power levels to see if it damages DNA. They found that lower exposure levels (up to 3 W/kg) caused temporary DNA breaks that the cells could repair, but higher exposure (4 W/kg) caused permanent DNA damage that cells couldn't fix.
Sun LX, Yao K, Jiang H, He JL, Lu DQ, Wang KJ, Li HW · 2006
Researchers exposed cultured human lens epithelial cells to 217 Hz modulated microwave radiation at four SAR levels for 2 hours. DNA single strand breaks were measured using the comet assay immediately after irradiation and at 30 and 60 minutes afterward. At the highest dose, significant DNA damage remained one hour after irradiation and cell proliferation was significantly decreased.
Sun LX, Yao K, He JL, Lu DQ, Wang KJ, Li HW · 2006
Chinese researchers exposed human eye lens cells to mobile phone radiation (1.8 GHz) at different power levels for 2 hours to see if it damaged DNA. They found that lower exposure levels (1-3 W/kg SAR) caused either no DNA damage or damage that the cells could repair within an hour, but the highest level (4 W/kg SAR) caused permanent DNA damage that cells couldn't fix.
Vanderwaal RP, Cha B, Moros EG, Roti Roti JL. · 2006
The radiofrequency exposures were 847 MHz TDMA at a SAR of 5 W kg-1 for 1, 2, or 24 h and 900 MHz GSM at a SAR of 3.7 W kg-1 for 1, 2, or 5 h. Acute hyperthermia at 45 degrees C increased the proportion of higher phosphorylated forms of HSP27. Exposure of HeLa S3 cells to 5 W kg-1 TDMA for 1, 2, or 24 h did not induce significant differences in HSP27 phosphorylation compared to incubator control or sham.
Zhao R, Zhang SZ, Yao GD, Lu DQ, Jiang H, Xu ZP · 2006
Qutob SS et al. · 2006
Researchers exposed U87MG glioblastoma cells to a 1.9 GHz pulse-modulated RF field for 4 hours at SARs of 0.1, 1.0, and 10.0 W/kg to assess global gene expression. No evidence was found that non-thermal RF fields affect gene expression in these cells compared to nonirradiated controls. Heat shock at 43°C for 1 hour up-regulated typical stress-responsive genes in the positive control group.
Shen YH, Yu D, Fu YT, Chiang H. · 2006
Five hundred female Sprague Dawley rats received a single dose of 35 mg/kg DMBA and were divided into five groups with SARs of 0, 0.44, 1.33, and 4.00 W/kg, exposed for 4 hours per day, 5 days per week for 26 weeks. The sham-exposure group had a 37% carcinoma incidence, while the exposure groups at 0.44, 1.33, and 4.00 W/kg had incidences of 25%, 34%, and 38% respectively, with no statistically significant differences between groups. The authors concluded that the study did not provide evidence that 900 MHz GSM microwave exposure promotes DMBA-induced mammary tumor development in rats.
Lixia S et al. · 2006
Researchers exposed human lens epithelial cells (hLEC) to a 1.8 GHz GSM radiofrequency field at SARs of 1, 2, and 3 W/kg for 2 hours and then measured DNA damage, Hsp70 expression, and cell proliferation. DNA breaks at 1 and 2 W/kg were not significantly different from controls at any time point, while the 3 W/kg dose showed significantly increased DNA damage only at 0 and 30 minutes after exposure. Hsp70 protein expression was significantly increased at 2 and 3 W/kg, but Hsp70 mRNA expression did not change in any group, and cell proliferation was unaffected at all doses.
Paulraj R, Behari J. · 2006
Researchers exposed 35-day-old male Wistar rats to microwave radiation at 2.45 GHz and 16.5 GHz for 35 days to study effects on developing rat brain. After exposure, the researchers measured DNA single strand breaks in brain tissue using micro gel electrophoresis (comet assay), with fifty cells from each slide and two slides per animal observed. The study found a statistically significant increase (p < 0.001) in DNA single strand breaks in the brain cells of exposed rats.
Lixia S et al. · 2006
Researchers exposed human eye lens cells to cell phone radiation at different power levels for 2 hours. Higher exposures caused temporary DNA damage and triggered cellular stress responses, suggesting that phone radiation can affect eye cells even without heating tissue.
Paulraj R, Behari J. · 2006
Researchers exposed developing rat brains to microwave radiation at frequencies used in WiFi (2.45 GHz) and other wireless devices (16.5 GHz) for 35 days. They found statistically significant increases in DNA single strand breaks in brain cells compared to unexposed rats. This suggests that chronic microwave exposure during brain development may cause genetic damage that could potentially lead to long-term health problems.
Pavicic I, Trosic I, Sarolic A · 2006
Researchers compared the effects of 864 MHz and 935 MHz microwave radiation on V79 cell proliferation, colony formation, and viability. Cells exposed to 864 MHz for 2 or 3 hours showed significantly reduced growth on day 3, whereas 3-hour 935 MHz exposure significantly increased growth. Colony-forming ability and viability did not differ significantly from controls for either frequency.
Papageorgiou CC et al. · 2006
Exposure increased the amplitude of P50 evoked by low-frequency stimuli at the Fp1 and O1 electrode leads. Exposure decreased the amplitude of P50 evoked by high-frequency stimuli at the Fp1 electrode lead.
Vian A et al. · 2006
The study aimed to investigate how microwave irradiation affects gene expression in plants. Researchers used a carefully calibrated system that mimics environmental electromagnetic fields to measure changes in mRNA encoding a stress-related bZIP transcription factor. Exposure to low-amplitude, short-duration 900 MHz EMF evoked a rapid 3.5-fold accumulation of this mRNA, peaking 5–15 minutes after stimulation, similar to mechanical stimulation.
Lantow M, Schuderer J, Hartwig C, Simko M. · 2006
Heat and PMA treatment significantly increased superoxide radical anions and ROS production in Mono Mac 6 cells. No significant differences in free radical production were detected after RF EMF exposure compared to controls. The GSM-DTX signal at 2 W/kg showed a significant difference versus sham due to a decreasing sham value, but this difference disappeared when compared to incubator controls. No significant effects on HSP70 expression were detected after RF EMF exposures.
Verschaeve L et al. · 2006
Researchers investigated combined genotoxic effects of 900 MHz radiofrequency fields and the drinking water mutagen MX in female rats over two years. MX induced DNA damage in rat brain but not in blood or liver cells. Co-exposure to RF fields and MX did not significantly increase DNA damage in blood, liver, or brain compared to MX alone. The study used alkaline comet assay and micronucleus tests on samples taken at multiple time points.
Remondini D et al. · 2006
Researchers exposed six human cell types to 900 and 1800 MHz microwaves and analyzed gene expression using whole-genome cDNA arrays. NB69 neuroblastoma cells, T lymphocytes, and CHME5 microglial cells did not show significant changes in gene expression. EA.hy926 endothelial cells, U937 lymphoblastoma cells, and HL-60 leukemia cells showed between 12 and 34 up- or down-regulated genes. The affected gene families did not indicate a stress response.
Scarfi MR et al. · 2006
Researchers exposed human peripheral blood lymphocytes from 10 healthy donors to 900 MHz GSM signals at SARs of 0, 1, 5, and 10 W/kg for 24 hours. The cytokinesis-block micronucleus assay showed no genotoxic or cytotoxic effects across the range of SARs investigated. Two independent laboratories (ENEA Rome and CNR-IREA Naples) each tested five donors and cross-scored slides, confirming the findings.
Thorlin et al. · 2006
Researchers exposed cultured astroglial and microglial cells to 900 MHz microwave radiation at various SARs and durations. They measured markers including interleukin 6, tumor necrosis factor-alpha, glial fibrillary acidic protein, total protein, and ED-1. No significant differences were found for any parameter at any time or radiation characteristic. Total protein levels remained constant and cell morphology appeared unaffected. The study concluded no evidence for effects on damage-related factors in glial cells.
Aitken RJ, Bennetts LE, Sawyer D, Wiklendt AM, King BV. · 2005
Researchers exposed mice to 900 MHz RFEMR at a specific absorption rate of approximately 90 mW/kg inside a waveguide for 7 days at 12 h per day. Sperm number, morphology, and vitality were not significantly affected by the exposure. However, detailed DNA analysis using QPCR revealed statistically significant damage to both the mitochondrial genome and the nuclear beta-globin locus.
Oktem F, Ozguner F, Mollaoglu H, Koyu A, Uz E. · 2005
Researchers exposed rats to 900-MHz mobile phone radiation for 30 minutes daily over 10 days. Exposure increased kidney tissue malondialdehyde and urine N-acetyl-beta-d-glucosaminidase while decreasing superoxide dismutase, catalase, and glutathione peroxidase activities. Melatonin administered before each exposure reversed these changes. The authors concluded that melatonin may protect against mobile phone-induced kidney impairment in rats.
Oktem F, Ozguner F, Mollaoglu H, Koyu A, Uz E · 2005
Researchers exposed rats to 900-MHz cell phone radiation for 30 minutes daily over 10 days and found significant kidney damage through oxidative stress (cellular damage from harmful molecules called free radicals). The study showed increased markers of kidney damage and reduced antioxidant defenses, but when rats were given melatonin before exposure, these harmful effects were largely prevented.
Huber R et al. · 2005
Researchers investigated the effects of radio frequency electromagnetic fields similar to those emitted by mobile phones on waking regional cerebral blood flow in 12 healthy young men. Positron emission tomography scans were taken after 30 min unilateral head exposure to pulse-modulated 900 MHz RF EMF, and a sham control condition was also included. Only the 'handset-like' signal, which had stronger low-frequency components, increased relative cerebral blood flow in the dorsolateral prefrontal cortex on the side of exposure; the 'base-station-like' signal did not.
