No evidence of DNA damage by co-exposure to extremely low frequency magnetic fields and aluminum on neuroblastoma cell lines.

Milena Villarini, Angela Gambelunghe, Daniela Giustarini, Maria Vittoria Ambrosini, Cristina Fatigoni, Ranieri Rossi, Luca Dominici, Sara Levorato, Giacomo Muzi, Danilo Piobbico, Giuseppina Mariucci

Mutation research. Genetic toxicology and environmental mutagenesis 2017 Nov

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Whether exposure to 50-60Hz extremely low frequency magnetic fields (ELF-MF) exerts neurotoxic effects is a debated issue. Analogously, the potential role of Aluminum (Al) in neurodegeneration is a matter of controversial debate. As all living organisms are exposed to ELF-MF and/or Al daily, we found investigating the early effects of co-exposure to ELF-MF and Al in SH-SY5Y and SK-N-BE-2 human neuroblastoma (NB) cells intriguing. SH-SY5Y5 and SK-N-BE-2 cells underwent exposure to 50Hz ELF-MF (0.01, 0.1 or 1mT) or AlCl3 (4 or 40μM) or co-exposure to 50Hz ELF-MF and AlCl3 for 1h continuously or 5h intermittently. The effects of the treatment were evaluated in terms of DNA damage, redox status changes and Hsp70 expression. The DNA damage was assessed by Comet assay; the cellular redox status was investigated by measuring the amount of reduced glutathione (GSH) and glutathione disulfide (GSSG) while the inducible Hsp70 expression was evaluated by western blot analysis and real-time RT-PCR. Neither exposure to ELF-MF or AlCl3 alone induced DNA damage, changes in GSH/GSSG ratio or variations in Hsp70 expression with respect to the controls in both NB cell lines. Similarly, co-exposure to ELF-MF and AlCl3 did not have any synergic toxic effects. The results of this in vitro study, which deals with the effects of co-exposure to 50Hz MF and Aluminum, seem to exclude that short-term exposure to ELF-MF in combination with Al can have harmful effects on human SH-SY5Y and SK-N-BE-2 cells. Copyright © 2017 Elsevier B.V. All rights reserved.

Citation

Milena Villarini, Angela Gambelunghe, Daniela Giustarini, Maria Vittoria Ambrosini, Cristina Fatigoni, Ranieri Rossi, Luca Dominici, Sara Levorato, Giacomo Muzi, Danilo Piobbico, Giuseppina Mariucci. No evidence of DNA damage by co-exposure to extremely low frequency magnetic fields and aluminum on neuroblastoma cell lines. Mutation research. Genetic toxicology and environmental mutagenesis. 2017 Nov;823:11-21