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Combined effects of 60 Hz electromagnetic field exposure with various stress factors on cellular transformation in NIH3T3 cells
Author(s) -
Lee HaeJune,
Jin Yeung Bae,
Lee Jae Seon,
Choi JongIl,
Lee JuWoon,
Myung Sung Ho,
Lee YunSil
Publication year - 2012
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.20700
Subject(s) - carcinogen , in vitro , ionizing radiation , transformation (genetics) , oxidative stress , hydrogen peroxide , chemistry , toxicology , microbiology and biotechnology , biology , biochemistry , irradiation , physics , nuclear physics , gene
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 (H 2 O 2 ), 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, H 2 O 2 , 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, H 2 O 2 , or activated c‐Myc in NIH3T3 cells. Bioelectromagnetics 33:207–214, 2012. © 2011 Wiley Periodicals, Inc.