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Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Brain & Nervous System

de Gannes FP, Billaudel B, Taxile M, Haro E, Ruffié G, Lévêque P, Veyret B, Lagroye I

No Effects Found

Authors not listed · 2009

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Controlled study found no link between power line frequency magnetic fields and ALS progression in susceptible mice.

Plain English Summary

Summary written for general audiences

French researchers exposed genetically modified mice prone to ALS (Lou Gehrig's disease) to 50 Hz magnetic fields at levels similar to occupational exposure for 7 weeks. The study found no evidence that magnetic field exposure accelerated disease onset, worsened symptoms, or shortened lifespan in these ALS-susceptible mice.

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
Cite This Study
Unknown (2009). de Gannes FP, Billaudel B, Taxile M, Haro E, Ruffié G, Lévêque P, Veyret B, Lagroye I.
Show BibTeX
@article{de_gannes_fp_billaudel_b_taxile_m_haro_e_ruffi_g_lvque_p_veyret_b_lagroye_i_ce3201,
  author = {Unknown},
  title = {de Gannes FP, Billaudel B, Taxile M, Haro E, Ruffié G, Lévêque P, Veyret B, Lagroye I},
  year = {2009},
  doi = {10.3109/17482960802320396},
  
}
DOI: 10.3109/17482960802320396PubMed: 19922126

Quick Questions About This Study

This study found no evidence that 50 Hz magnetic field exposure worsened motor symptoms, accelerated disease progression, or shortened survival time in mice genetically prone to developing ALS.
Researchers tested 100 and 1000 microTesla magnetic fields, representing moderate to high occupational exposure levels. Most people experience much lower daily exposures, typically under 1 microTesla.
SOD-1 transgenic mice carry genetic mutations that cause them to develop ALS-like symptoms, making them useful research models. However, animal studies don't always translate directly to human disease outcomes.
The mice were exposed to 50 Hz magnetic fields for 7 weeks, starting before clinical ALS symptoms appeared. Researchers monitored body weight, motor performance, and lifespan throughout the study.
While this controlled animal study found no effects, it doesn't definitively rule out all magnetic field risks for ALS. Human epidemiological studies have suggested possible occupational associations that warrant continued research.