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Reactive oxygen species mediates 50-Hz magnetic field-induced EGF receptor clustering via acid sphingomyelinase activation.

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Sun L, Chen L, Bai L, Xia Y, Yang X, Jiang W, Sun W. · 2018

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Power frequency magnetic fields trigger cancer-related cellular changes through oxidative stress at levels found near power lines.

Plain English Summary

Summary written for general audiences

Researchers exposed human cells to power line frequency magnetic fields for 15 minutes and found they triggered harmful cellular changes linked to uncontrolled cell growth. The magnetic fields increased damaging molecules called reactive oxygen species, proving these everyday exposures can disrupt normal cell function.

Why This Matters

This study provides crucial mechanistic evidence for how power frequency magnetic fields can trigger cellular changes that may contribute to cancer development. The 0.4 milliTesla exposure level is significant - while higher than typical home exposures (usually 0.1-0.3 mT near appliances), it's well within ranges found near power lines or in some occupational settings. What makes this research particularly important is that it identifies the specific biological pathway: magnetic fields generate reactive oxygen species, which then activate enzymes that cause growth factor receptors to cluster abnormally. This receptor clustering is a known early step in cancer development. The fact that antioxidants completely blocked these effects suggests our cells' natural defenses can be overwhelmed by EMF exposure, supporting the growing body of evidence that these fields are not as biologically inert as once assumed.

Exposure Details

Magnetic Field
0.4 mG
Source/Device
50-Hz
Exposure Duration
15 min

Exposure Context

This study used 0.4 mG for magnetic fields:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.4 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Slight Concern rangeFCC limit is 5,000x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

Exposure to extremely low frequency electromagnetic fields (ELF-EMFs) could elicit biological effects including carcinogenesis. However, the detailed mechanisms by which these ELF-EMFs interact with biological system are currently unclear. Previously, we found that a 50-Hz magnetic field (MF) exposure could induce epidermal growth factor receptor (EGFR) clustering and phosphorylation on cell membranes. In the present experiment, the possible roles of reactive oxygen species (ROS) in MF-induced EGFR clustering were investigated.

Human amnion epithelial (FL) cells were exposed to a 50-Hz MF with or without N-acetyl-l-cysteine (N...

Results showed that exposure of FL cells to a 50-Hz MF at 0.4 mT for 15 min significantly enhanced t...

The present and previous data suggest that ROS mediates the MF-induced EGFR clustering via ASMase activation.

Cite This Study
Sun L, Chen L, Bai L, Xia Y, Yang X, Jiang W, Sun W. (2018). Reactive oxygen species mediates 50-Hz magnetic field-induced EGF receptor clustering via acid sphingomyelinase activation. Int J Radiat Biol. 94(7):678-684, 2018.
Show BibTeX
@article{l_2018_reactive_oxygen_species_mediates_468,
  author = {Sun L and Chen L and Bai L and Xia Y and Yang X and Jiang W and Sun W.},
  title = {Reactive oxygen species mediates 50-Hz magnetic field-induced EGF receptor clustering via acid sphingomyelinase activation.},
  year = {2018},
  doi = {10.1080/09553002.2018.1466208},
  url = {https://www.tandfonline.com/doi/abs/10.1080/09553002.2018.1466208},
}
DOI: 10.1080/09553002.2018.1466208

Cited By (11 papers)

Quick Questions About This Study

Yes, just 15 minutes of exposure to 50 Hz magnetic fields at 0.4 mT significantly increased harmful reactive oxygen species in human cells. This brief exposure triggered cellular changes linked to uncontrolled cell growth, demonstrating that even short exposures to power line frequencies can disrupt normal cell function.
Research shows that 50 Hz magnetic fields at 0.4 mT cause EGFR receptor clustering in human cells within 15 minutes. This clustering process is mediated by increased reactive oxygen species and acid sphingomyelinase enzyme activation, representing a significant cellular disruption from everyday power line exposures.
Yes, antioxidant compounds NAC and PDTC successfully blocked the harmful effects of 50 Hz magnetic field exposure. These antioxidants prevented both the increase in damaging reactive oxygen species and the abnormal EGFR receptor clustering that magnetic fields typically cause in human cells.
50 Hz magnetic fields activate acid sphingomyelinase (ASMase), an enzyme that contributes to harmful cellular changes. This enzyme activation occurs through increased reactive oxygen species and leads to EGFR receptor clustering, which is associated with uncontrolled cell growth and cellular dysfunction.
Human cells show significant biological changes within just 15 minutes of exposure to 0.4 mT magnetic fields at 50 Hz frequency. This rapid response includes increased reactive oxygen species, enzyme activation, and receptor clustering, proving that cellular damage from magnetic fields occurs much faster than previously thought.