4.5 Article

50-Hz magnetic field impairs the expression of iron-related genes in the in vitro SOD1G93A model of amyotrophic lateral sclerosis

Journal

INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
Volume 95, Issue 3, Pages 368-377

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/09553002.2019.1552378

Keywords

Extremely low frequency magnetic field; fALS; SOD1; G93A; iron; in vitro

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Purpose: We characterized the response to the extremely low frequency magnetic field (ELF-MF) in an in vitro model of familial Amyotrophic Lateral Sclerosis (fALS), carrying two mutant variants of the superoxide dismutase 1 (SOD1) gene. Materials and methods: SH-SY5Y human neuroblastoma cells, stably over-expressing the wild type, the G93A or the H46R mutant SOD1 cDNA, were exposed to either the ELF-MF (50 Hz, 1 mT) or the sham control field, up to 72 h. Analysis of (i) viability, proliferation and apoptosis, (ii) reactive oxygen species generation, and (iii) assessment of the iron metabolism, were carried out in all clones in response to the MF exposure. Results: We report that 50-Hz MF exposure induces: (i) no change in proliferation and viability; (ii) no modulation of the intracellular superoxide and H2O2 levels; (iii) a significant deregulation in the expression of iron-related genes IRP1, MFRN1 and TfR1, this evidence being exclusive for the SOD1(G93A) clone and associated with a slight (p = .0512) difference in the total iron content. Conclusions: 50-Hz MF affects iron homeostasis in the in vitro SOD1(G93A) ALS model.

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