首页> 外文期刊>The Korean Journal of Physiology & Pharmacology >Effects on G2/M Phase Cell Cycle Distribution and Aneuploidy Formation of Exposure to a 60 Hz Electromagnetic Field in Combination with Ionizing Radiation or Hydrogen Peroxide in L132 Nontumorigenic Human Lung Epithelial Cells
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Effects on G2/M Phase Cell Cycle Distribution and Aneuploidy Formation of Exposure to a 60 Hz Electromagnetic Field in Combination with Ionizing Radiation or Hydrogen Peroxide in L132 Nontumorigenic Human Lung Epithelial Cells

机译:L132非致瘤性人肺上皮细胞对G2 / M期细胞周期分布和60Hz电磁场暴露与电离辐射或过氧化氢的非整倍性形成的影响

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The aim of the present study was to assess whether exposure to the combination of an extremely low frequency magnetic field (ELF-MF; 60 Hz, 1 mT or 2 mT) with a stress factor, such as ionizing radiation (IR) or H2O2, results in genomic instability in non-tumorigenic human lung epithelial L132 cells. To this end, the percentages of G2/M-arrested cells and aneuploid cells were examined. Exposure to 0.5 Gy IR or 0.05 mM H2O2 for 9 h resulted in the highest levels of aneuploidy; however, no cells were observed in the subG1 phase, which indicated the absence of apoptotic cell death. Exposure to an ELF-MF alone (1 mT or 2 mT) did not affect the percentages of G2/M-arrested cells, aneuploid cells, or the populations of cells in the subG1 phase. Moreover, when cells were exposed to a 1 mT or 2 mT ELF-MF in combination with IR (0.5 Gy) or H2O2 (0.05 mM), the ELF-MF did not further increase the percentages of G2/M-arrested cells or aneuploid cells. These results suggest that ELF-MFs alone do not induce either G2/M arrest or aneuploidy, even when administered in combination with different stressors.
机译:本研究的目的是评估暴露于极低频磁场(ELF-MF; 60 Hz,1 mT或2 mT)与应力因子(例如电离辐射(IR)或H < sub> 2 O 2 ,导致非致瘤性人肺上皮L132细胞的基因组不稳定。为此,检查了G2 / M停滞的细胞和非整倍体细胞的百分比。暴露于0.5 Gy IR或0.05 mM H 2 O 2 9 h导致非整倍性水平最高。然而,在subG1期未观察到细胞,这表明没有凋亡细胞死亡。单独暴露于ELF-MF(1 mT或2 mT)不会影响G2 / M阻滞的细胞,非整倍体细胞或subG1期细胞的百分比。此外,当细胞暴露于1 mT或2 mT ELF-MF与IR(0.5 Gy)或H 2 O 2 (0.05 mM)结合时,ELF -MF不会进一步增加G2 / M停滞的细胞或非整倍体细胞的百分比。这些结果表明,即使与不同的应激源联合使用,单独的ELF-MF也不诱导G2 / M阻滞或非整倍性。

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