Erratum: Combined effects of 60 Hz electromagnetic field exposure with various stress factors on cellular transformation in NIH3T3 cells: Erratum

Division of Radiation Effects, Korea Institute of Radiological and Medical Sciences, Seoul, Korea.
Bioelectromagnetics (Impact Factor: 1.71). 01/2014; 33(3):207-14. DOI: 10.1002/bem.20700
Source: PubMed


Epidemiological studies have suggested that extremely low-frequency magnetic fields (ELF-MF) are associated with an increased incidence of cancer. Studies using in vitro systems have reported mixed results for the effects of ELF-MF alone, and the World Health Organization (WHO) Research Agenda published in 2007 suggested that high priority research should include an evaluation of the co-carcinogenic effects of ELF-MF exposure using in vitro models. Here, the carcinogenic potential of ELF-MF exposure alone and in combination with various stress factors was investigated in NIH3T3 mouse fibroblasts using an in vitro cellular transformation assay. NIH3T3 cells were exposed to a 60 Hz ELF-MF (1 mT) alone or in combination with ionizing radiation (IR), hydrogen peroxide (H₂O₂), or c-Myc overexpression, and the resulting number of anchorage-independent colonies was counted. A 4 h exposure of NIH3T3 cells to ELF-MF alone produced no cell transformation. Moreover, ELF exposure did not influence the transformation activity of IR, H₂O₂, or activated c-Myc in our in vitro assay system, suggesting that 1 mT ELF-MF did not affect any additive or synergistic transformation activities in combination with stress factors such as IR, H₂O₂, or activated c-Myc in NIH3T3 cells.

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    • "These data suggest an oxidative stress response following some RF EMF exposure programs and led to the hypothesis that long-term exposure to EMF would cause chronic elevation of ROS and subsequent decrease in melatonin, leading to an increased risk for DNA damage and malignancy[39]. However, there have not been indications of increased transformation following EMF exposure alone or in combination with other stress factors, suggesting that EMF did not work in synergy with other stress factors to transform the cells[40]. "
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