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Manzella N et al, (March 2015) Circadian gene expression and extremely low-frequency magnetic fields: An in vitro study, Bioelectromagnetics

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Authors not listed · 2015

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Power line frequency magnetic fields can reset human cellular clocks, potentially disrupting circadian rhythms essential for health.

Plain English Summary

Summary written for general audiences

Researchers exposed human skin cells to 50 Hz magnetic fields (the same frequency as power lines) and found these fields could reset the cells' internal biological clocks. The magnetic field exposure altered the timing of key genes that control daily rhythms, suggesting that power line frequency EMF can disrupt our body's natural circadian processes.

Why This Matters

This study reveals a concerning mechanism by which power line frequency EMF may affect human health through circadian disruption. The science demonstrates that 50 Hz magnetic fields at just 0.1 mT can entrain peripheral clock genes in human cells. Put simply, the same frequency that powers your home's electrical grid can reset your cellular clocks. What this means for you is significant, as circadian rhythm disruption links to numerous health problems including sleep disorders, metabolic dysfunction, and increased cancer risk. The 0.1 mT exposure level used in this study is well within the range you might experience from household appliances, power lines, or electrical wiring. The reality is that your body's peripheral tissues may be responding to EMF exposures you encounter daily, potentially throwing off the precise biological timing that keeps you healthy.

Exposure Information

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

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2015). Manzella N et al, (March 2015) Circadian gene expression and extremely low-frequency magnetic fields: An in vitro study, Bioelectromagnetics.
Show BibTeX
@article{manzella_n_et_al_march_2015_circadian_gene_expression_and_extremely_low_frequency_magnetic_fields_an_in_vitro_study_bioelectromagnetics_ce2039,
  author = {Unknown},
  title = {Manzella N et al, (March 2015) Circadian gene expression and extremely low-frequency magnetic fields: An in vitro study, Bioelectromagnetics},
  year = {2015},
  doi = {10.1002/bem.21915},
  
}
DOI: 10.1002/bem.21915PubMed: 25808738

Quick Questions About This Study

Yes, this study found that 50 Hz magnetic fields at 0.1 mT could entrain key circadian clock genes in human fibroblast cells, demonstrating that power line frequency EMF can directly influence cellular timing mechanisms.
The study found that 50 Hz magnetic field exposure affected five key clock genes: BMAL1, PER2, PER3, CRY1, and CRY2. These genes are critical for maintaining proper circadian rhythms in peripheral tissues.
The researchers used a 0.1 mT (1 Gauss) magnetic field, which is comparable to levels you might encounter near household appliances or electrical installations, showing that relatively weak EMF can affect biological timing.
Yes, the study showed that 50 Hz magnetic field treatment could alter circadian clock gene expression that had been previously synchronized by serum shock, suggesting EMF can interfere with natural circadian entrainment processes.
This research supports the hypothesis that peripheral tissues, not just the brain's master clock, can be influenced by electromagnetic fields, potentially affecting circadian processes throughout the body via non-photic pathways.