title: Effect of high-frequency electromagnetic fields with a wide range of SARs on chromosomal aberrations in murine m5S cells.
abstract: To investigate the induction of chromosomal aberrations in mouse m5S cells after exposure to high-frequency electromagnetic fields (HFEMFs) at 2.45 GHz, cells were exposed for 2 h at average specific absorption rates (SARs) of 5, 10, 20, 50 and 100 W/kg with continuous wave-form (CW), or at a mean SAR of 100 W/kg (with a maximum of 900 W/kg) with pulse wave-form (PW). The effects of HFEMF exposure were compared with those in sham-exposed controls and with mitomycin C (MMC) or X-ray treatment as positive controls. We examined all structural, chromatid-type and chromosome-type changes after HFEMF exposures and treatments with MMC and X-rays. No significant differences were observed following exposure to HFEMFs at SARs from 5 to 100 W/kg CW and at a mean SAR of 100 W/kg PW (a maximum SAR of 900 W/kg) compared with sham-exposed controls, whereas treatments with MMC and X-rays increased the frequency of chromatid-type and chromosome-type aberrations. In summary, HFEMF exposures at 2.45 GHz for 2 h with up to 100 W/kg SAR CW and an average 100 W/kg PW (a maximum SAR of 900 W/kg) do not induce chromosomal aberrations in m5S cells. Furthermore, there was no difference between exposures to CW and PW HFEMFs.
authors.affiliation: Department of Radiological Technology, School of Health Sciences, Faculty of Medicine, Hirosaki University, Hirosaki, Aomori 036-8564, Japan.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Komatsubara
authors.forename: Hideki
authors.initials: H
authors.lastname: Hirose
authors.forename: Tomonori
authors.initials: T
authors.lastname: Sakurai
authors.forename: Shin
authors.initials: S
authors.lastname: Koyama
authors.forename: Yukihisa
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Masao
authors.initials: M
authors.lastname: Taki
authors.forename: Junji
authors.initials: J
authors.lastname: Miyakoshi
mesh_terms: D000327:Adsorption; D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000494:pharmacology; D002460:Cell Line; D002869:Chromosome Aberrations / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D004574:Electromagnetic Fields / Q000009:adverse effects*; D051379:Mice; D016685:Mitomycin / Q000494:pharmacology
chemical_list: D000903:Antibiotics, Antineoplastic; D016685:Mitomycin