Urnukhsaikhan E, Mishig-Ochir T, Kim S-C, Park J-K, Seo Y-K · 2017
Researchers exposed C57B6 mice to LF-PEMF at 60 Hz and 10 mT after inducing ischemic stroke via photothrombotic occlusion. They measured the BDNF/TrkB/Akt signaling pathway, pro-apoptotic and pro-survival protein and gene expressions, inflammatory mediators, and performed behavioral tests. LF-PEMF treatment promoted activation of the BDNF/TrkB/Akt signaling pathway. Pro-survival proteins increased significantly, while pro-apoptotic proteins and inflammatory mediators decreased. The results demonstrated a neuroprotective effect of LF-PEMF exposure after ischemic stroke in mice during recovery.
Unknown authors · 2017
Researchers studied the effects of pulsed electromagnetic fields on human bone marrow stromal cells using microarray analysis. PEMF stimulation of the cells mainly affected genes involved in cell cycle regulation, cell structure, and growth receptors or kinase pathways. During differentiation, PEMF regulated the TGF-β signaling pathway and microRNA 21, stimulated Smad2 activation and miR21-5p expression, and decreased Smad7 expression. PEMF increased Runx2 expression, and this increase was prevented by a miR21-5p inhibitor.
Pesqueira T, Costa-Almeida R, Gomes ME · 2017
Researchers exposed human tendon-derived cells to a low-frequency static magnetic field (2 Hz, 350 mT) using short-term exposures of 4 and 8 hours and long-term regimens of continuous, every 24 hours, or every 48 hours over an 8-hour period. In short-term studies, 8-hour stimulation significantly upregulated the tendon-associated genes SCX, COL1A1, TNC, and DCN and altered intracellular Ca2+ levels. In long-term studies, the every-24-hour regimen upregulated COL1A1, COL3A1, and TNC at day 14, while continuous exposure differentially regulated IL-1β and IL-10 release at day 7.
Li DK et al · 2017
Researchers conducted a prospective cohort study of 913 pregnant women to examine the association between high magnetic field exposure and miscarriage risk. Using Cox proportional hazards regression and controlling for multiple factors, they found women with higher magnetic field exposure had 2.72 times the miscarriage risk of those with lower exposure (hazard ratio = 2.72, 95% CI: 1.42–5.19). The increased risk was consistent regardless of the origin of the high magnetic field and was stronger when exposure was measured on a typical pregnancy day.
Momoli F et al. · 2017
Researchers re-analyzed Canadian data from the 13-country Interphone case-control study (2001–2004) to evaluate associations between mobile phone use and risks of brain, acoustic neuroma, and parotid gland tumors. For glioma, the odds ratio for the highest quartile of use (>558 lifetime hours) compared to non-regular users was 2.0 (95% CI 1.2–3.4), and after adjusting for selection and recall biases it became 2.2 (95% limits 1.3–4.1). There was little evidence of increased risk for meningioma, acoustic neuroma, or parotid gland tumors.
Schoeni A, Roser K, Röösli M. · 2017
Researchers conducted a prospective cohort study of 439 Swiss adolescents aged 12-17 years who completed questionnaires about mobile and cordless phone use and symptoms at baseline and one year later. Operator-recorded mobile phone data were obtained for a subgroup of 234 adolescents, and RF-EMF dose measures for the brain and whole body were computed. Data were analyzed using mixed-logistic cross-sectional and cohort models adjusted for confounders. Symptoms such as tiredness were more strongly associated with text message frequency (OR 1.81 cross-sectional, OR 1.87 cohort) than with call duration or RF-EMF dose measures. The pattern of stronger associations with device use than with RF-EMF dose does not support a causal effect of RF-EMF exposure on symptoms.
Schauer I, Mohamad Al-Ali B. · 2017
Researchers conducted a retrospective analysis of 468 men attending an infertility clinic from 1993 to 2007. Varicoceles were determined by clinical examination and patients were questioned on cell phone usage and storage fashion. Varicocele showed an effect on sperm concentration, LH, and testosterone. Cell phone storage in trousers pockets showed an influence on the percentage of normal sperm morphology and LH. No combined effect of varicocele and cell phone storage was detected.
Sato Y, Kojimahara N, Yamaguchi N · 2017
The study included 82 patients aged 6 to 18 years diagnosed with brain tumors between 2006 and 2010. Patients were divided into 16 mobile phone owners and 66 non-owners one year before diagnosis. Researchers used three general-population surveys to calculate expected ownership and found age-adjusted standardized ownership ratios of 0.83, 0.51, and 0.75 with confidence intervals of 0.56-1.22, 0.24-1.04, and 0.42-1.32. Mobile phone ownership prevalence among the young patients did not differ from general population estimates.
Danese E et al. · 2017
Researchers exposed blood samples from 14 healthy volunteers to 900 MHz radiofrequency from a commercial mobile phone for 30 minutes. A control sample was kept away from radiofrequency sources. DNA integrity was measured by analyzing γ-H2AX foci in lymphocytes using immunofluorescence staining. No measure of γ-H2AX foci was significantly influenced by the exposure, and the odds ratio for genetic damage ranged from 0.27 to 1.00.
Choi KH et al. · 2017
Andrianome S et al. · 2017
Researchers compared autonomic nervous system activity in 30 self-declared electrohypersensitive participants and 25 matched controls using heart rate variability and skin conductance. The electrohypersensitive group showed more skin conductance responses to auditory stimuli, while short-term heart rate variability did not differ between groups. In a double-blind, counterbalanced session, 10 electrohypersensitive volunteers were exposed to GSM 900, GSM 1800, DECT, and Wi-Fi at 1 V/m. No changes in heart rate variability or skin conductance were observed during or after exposure.
Zhang J, Sumich A, Wang GY. · 2017
The review focuses on recent neuroimaging and electroencephalography studies to analyze effects of MP EMF exposure on neurocognitive function. Several studies indicate an increase in cortical excitability and/or efficiency with EMF exposure, more prominent in fronto-temporal regions and associated with faster reaction time. Cortical excitability might also underpin disruption to sleep. However, several inconsistent findings exist and conclusions regarding adverse effects of EMF exposure are currently limited.
Yilmaz A et al. · 2017
Pregnant rats were exposed to 900 MHz EMF for 24 hours a day over 20 days using a digital signal generator placed under the cage. Livers and blood were collected from male and female offspring 60 days after birth for biochemical and histopathological analysis. Liver malondialdehyde levels increased significantly while glutathione levels decreased significantly, and serum ALT and AST levels were significantly elevated. Liver sections showed intense hepatocyte degeneration with cytoplasmic eosinophilic structures, pyknotic nuclei, and fibrosis. The researchers concluded that intrauterine EMF exposure causes harmful liver effects that persist into adulthood.
Wang J, Su H, Xie W, Yu S. · 2017
Researchers performed a systematic review and meta-analysis of 7 cross-sectional studies on MP use and headache. The pooled analysis found a 38% increased risk of headache in MP users versus non-MP users. Among MP users, longer daily call duration and higher daily call frequency were each associated with greater headache risk.
Sato Y, Kojimahara N, Taki M, Yamaguchi N · 2017
The study aimed to clarify the distribution of ear side of mobile phone use in Japan and factors associated with it. Statistically significant differences were observed only in talk time per call with an odds ratio of 2.17 and a 95% confidence interval of 1.22 to 3.99. In right-handed adults, left-ear use was significantly associated with age groups 30-39 (OR = 2.55; 95% CI: 1.79-3.68), 40-49 (OR = 3.08; 95% CI: 2.15-4.43), over 50 (OR = 1.85; 95% CI: 1.20-2.85), and with work-related talk time of 51-100% (OR = 1.75; 95% CI: 1.21-2.55). The survey included 2,518 children and 1,529 adults who completed an Internet-based survey, and data were analyzed by logistic regression. In children, the analysis focused on right-ear use in right-handed individuals due to dominant-hand tendency.
Martens AL et al. · 2017
Lu X, Oda M, Ohba T, Mitsubuchi H, Masuda S, Katoh T. · 2017
The study aimed to determine the associations of excessive mobile phone use with neonatal birth weight and infant health status. A sample of 461 mother and child pairs participated in a survey on maternal characteristics, infant characteristics, and maternal mobile phone usage information during pregnancy. The mean infant birth weight was lower in the excessive use group than in the ordinary use group, and the frequency of infant emergency transport was significantly higher in the excessive use group than in the ordinary use group.
Lee AK, Hong SE, Kwon JH, Choi HD, Cardis E. · 2017
Researchers calculated specific absorption rate for four anatomical head models at different ages using 11 numerical phone models of different shapes and antenna configurations. The 11 models represented phone types accounting for around 86% of the approximately 1400 commercial phone models released into the Korean market since 2002. Seven of the phone models selected had an internal dual-band antenna and the remaining four had an external antenna. The 1 g peak spatial SAR and ipsilateral and contralateral brain-averaged SARs were reported for all 11 phone models, and the effects of phone type, phone position, operating frequency, and age of head models on brain SAR were comprehensively determined.
Kamali K et al. · 2017
Researchers collected 40 semen samples from healthy men and divided them into exposed and unexposed groups. The exposed group was placed in an incubator with a 3G+Wi-Fi modem downloading data for 50 minutes, while the unexposed group was shielded with aluminum foil. Sperm motility class C was significantly lower in the exposed group, while class D was significantly higher. Several velocity parameters were significantly higher in the unexposed group. The authors concluded that electromagnetic waves from 3G+Wi-Fi modems significantly decrease sperm motility and velocity.
Hardell L, Carlberg M. · 2017
Researchers analyzed brain tumor rates in the Swedish National Inpatient Register and Swedish Cancer Register from 1998 to 2015. The average annual percentage change for brain tumors increased by 2.06% per 100,000 in both genders combined. A joinpoint in 2007 showed a shift from a 0.16% annual change before 2007 to a 4.24% annual change after 2007. The highest increase was in the 20-39 year age group. The authors concluded that underreporting to the Cancer Register means real incidence is higher and trends should be used with caution.
Halgamuge MN. · 2017
The analysis found that 89.9% of studies reported physiological or morphological effects from mobile phone RF-EMF (p < 0.001). Maize, roselle, pea, fenugreek, duckweeds, tomato, onions, and mungbean appeared especially sensitive to RF-EMF.
Gkonis F, Boursianis A, Samaras T. · 2017
Researchers investigated changes in electromagnetic field exposure from television signals due to the digital switchover in Thessaloniki, Greece. Measured electric fields complied with ICNIRP guidelines but were higher than those reported in other countries. The authors noted that the higher values may be attributed to the selection of measurement points. The median power density dropped from 60 μW m during analog broadcasting to 13.3 μW m for digital television. The authors concluded that the digital switchover resulted in reduced population exposure to radiofrequency fields in the UHF range.
Eghlidospour M, Ghanbari A, Mortazavi SMJ, Azari H. · 2017
Researchers exposed adult murine neural stem cells to GSM 900-MHz radiofrequency radiation from a mobile phone for varying durations. They used neurosphere assays to evaluate proliferation, immunofluorescence to examine differentiation, and alamarBlue and caspase 3 apoptosis assays to assess harmful effects. Neurosphere number and size and the proportion of cells becoming neurons decreased significantly with longer exposure. Cell viability, apoptosis, and astrocytic differentiation were unchanged.
Durusoy R, Hassoy H, Özkurt A, Karababa AO. · 2017
Headache, fatigue, and sleep disturbances were reported 1.90, 1.78, and 1.53 times more often among mobile phone users. Dose-response relationships were found for call frequency, call duration, text message frequency, phone position at night, and charging while calling with symptoms such as headache, concentration difficulties, fatigue, sleep disturbances, ear warming, and flushing. No association was found between school EMF levels and symptoms, while limited associations were seen for proximity to base stations. Data were collected via questionnaire and EMF measurements from November 2009 to April 2011 using an Aaronia Spectran HF-4060 device.
de Oliveira FM, Carmona AM2 Ladeira C. · 2017
To test whether mobile phone-associated EMF exposure affects micronucleus frequency in exfoliated buccal cells, the researchers obtained cell smears from the left and right inner cheeks of 86 healthy mobile phone users aged 18-30 who completed a characterization survey. No relationship was observed between micronucleus frequency and duration of mobile phone use in daily calls. Cells on the same side as phone use did not show a statistically significantly higher micronucleus frequency compared to cells on the opposite side. A highly statistically significant increase in micronucleus frequency was found in subjects reporting regular exposure to genotoxic agents.
