scholarly journals Occupational exposure to extremely low frequency electric and magnetic fields and Alzheimer disease: a meta-analysis

2008 ◽  
Vol 37 (2) ◽  
pp. 329-340 ◽  
Author(s):  
A. M Garcia ◽  
A. Sisternas ◽  
S. P. Hoyos
Keyword(s):  
Occupational Exposure ◽  
Alzheimer Disease ◽  
Magnetic Fields ◽  
Meta Analysis ◽  
Low Frequency ◽  
Extremely Low Frequency ◽  
Electric And Magnetic Fields

Oxidative stress associated with long term occupational exposure to extremely low frequency electric and magnetic fields

Work ◽  
2020 ◽  
pp. 1-8
Author(s):  
Majid Bagheri Hosseinabadi ◽  
Narges Khanjani ◽  
Pirasteh Norouzi ◽  
Seyed Reza Mirbadie ◽  
Mozhgan Fazli ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Power Plant ◽  
Occupational Exposure ◽  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Low Frequency ◽  
Exposed Group ◽  
Extremely Low Frequency ◽  
Electric And Magnetic Fields

BACKGROUND: Occupational exposure to extremely low frequency electromagnetic fields (ELF-EMFs) may have harmful effects on biologic systems and has raised many concerns in the last decades. OBJECTIVE: The aim of this study was to determine the effects of exposure to extremely low frequency electric and magnetic fields on lipid peroxidation and antioxidant enzyme activities. METHODS: This study was conducted on 115 power plant workers as the exposed group and 145 office workers as the non-exposed group. The levels of Malondialdehyde (MDA), Superoxide Dismutase (SOD), Catalase (Cat), and Total Antioxidant Capacity (TAC) were measured in the serum of all subjects. Exposure to ELF-EMFs was measured based on spot measurements and the IEEE Std C95.3.1 standard. RESULTS: The levels of MDA, SOD, and Cat in the exposed group were significantly higher than in the non-exposed group. However, the level of TAC was not significantly different between the exposed (2.45±1.02) and non-exposed (2.21±1.07) groups. The levels of MDA and SOD were higher among workers with higher exposure to electric fields than workers with low exposure. All oxidative stress indicators increased with increased exposure to magnetic fields, except TAC. CONCLUSIONS: The antioxidant system imbalance among power plant workers may be related to long term occupational exposure to electromagnetic fields.

Occupational Exposure to Electric Shocks and Extremely Low-Frequency Magnetic Fields and Motor Neurone Disease

2020 ◽  
Author(s):  
Grace X Chen ◽  
Andrea’t Mannetje ◽  
Jeroen Douwes ◽  
Leonard H Berg ◽  
Neil Pearce ◽  
...  
Keyword(s):  
Occupational Exposure ◽  
Magnetic Fields ◽  
Low Frequency ◽  
Population Based ◽  
Motor Neurone ◽  
Motor Neurone Disease ◽  
Cumulative Exposure ◽  
Spine Injury ◽  
Extremely Low Frequency ◽  
Electric Shocks

Abstract In a New Zealand population-based case-control study we assessed associations with occupational exposure to electric shocks, extremely low-frequency magnetic fields (ELF-MF) and motor neurone disease using job-exposure matrices to assess exposure. Participants were recruited between 2013 and 2016. Associations with ever/never, duration, and cumulative exposure were assessed using logistic regression adjusted for age, sex, ethnicity, socioeconomic status, education, smoking, alcohol consumption, sports, head or spine injury and solvents, and mutually adjusted for the other exposure. All analyses were repeated stratified by sex. An elevated risk was observed for having ever worked in a job with potential for electric shocks (odds ratio (OR)=1.35, 95% confidence interval (CI): 0.98, 1.86), with the strongest association for the highest level of exposure (OR=2.01, 95%CI: 1.31, 3.09). Analysis by duration suggested a non-linear association: risk was increased for both short-duration (<3 years) (OR= 4.69, 95%CI: 2.25, 9.77) and long-duration in a job with high level of electric shock exposure (>24 years; OR=1.88; 95%CI: 1.05, 3.36), with less pronounced associations for intermediate durations. No association with ELF-MF was found. Our findings provide support for an association between occupational exposure to electric shocks and motor neurone disease but did not show associations with exposure to work-related ELF-MF.

scholarly journals O4A.6 Occupational exposure to extremely low frequency magnetic fields and melatonin in male rotating shift workers

2019 ◽  
Vol 76 (Suppl 1) ◽  
pp. A33.3-A33
Author(s):  
Michelle C Turner ◽  
Esther Gracia-Lavedan ◽  
Gemma Castaño-Vinyals ◽  
Debra J Skene ◽  
Benita Middleton ◽  
...  
Keyword(s):  
Occupational Exposure ◽  
Magnetic Fields ◽  
Geometric Mean ◽  
Night Shift ◽  
Low Frequency ◽  
Personal Characteristics ◽  
Peak Time ◽  
Shift Workers ◽  
Extremely Low Frequency ◽  
Melatonin Production

BackgroundOccupational exposure to extremely low frequency magnetic fields (ELF-MF) is a suspected cancer risk factor, however, the epidemiological literature is limited and potential biological mechanisms unclear. Night shift work and associated circadian misalignment, leading to decreased melatonin production is also suspected in cancer. It has been suggested that ELF-MF exposure may decrease melatonin production leading to the promotion of cancer development, however previous findings are inconsistent. We assessed ELF-MF exposure and melatonin production in a recent study of male rotating shift workers.MethodsA total of 50 male shift workers rotating in a 3 week night, 3 week evening, and 3 week morning schedule were recruited at a local car manufacturing facility. Personal full-shift measurements of ELF-MF exposure were performed (EMDEX II, 40–800 Hz) and urine samples from all voids over 24 hour collected on two working days (end of 3 week night and end of 3 week morning shifts). Urinary concentrations of 6-sulfatoxymelatonin (aMT6s), the main melatonin metabolite, were measured in all samples (creatinine corrected), with the mesor (24 hour mean) derived based on cosinor models.ResultsArithmetic mean (AM (SD)) and geometric mean (GM (GSD)) ELF-MF levels were 0.05 (0.06) µT and 0.03 (0.02) µT, respectively. Peak production of aMT6s occurred 9 hours later in night compared with morning shifts, though with a similar mesor indicating adaptation. The adjusted mesor varied somewhat by age group and other personal characteristics, and was somewhat lower among those with higher AM and GM ELF-MF levels (i.e. ≥50 th or 75th percentile), with differences ranging from 0.94–1.38 ng/mg creatinine/hour in the morning to 0.96–4.33 in the night shift observed, with some differences significant.ConclusionsOverall, small differences in mean aMT6s levels were observed according to ELF-MF. Workers during the night shift adapted, showing a delay in the peak time of aMT6s production compared to the day shift.

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