Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.
Effects of head-only exposure of rats to GSM-900 on blood-brain barrier permeability and neuronal degeneration
No Effects Found
de Gannes FP, Billaudel B, Taxile M, Haro E, Ruffié G, Lévêque P, Veyret B, Lagroye I · 2009
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
Cite This Study
de Gannes FP, Billaudel B, Taxile M, Haro E, Ruffié G, Lévêque P, Veyret B, Lagroye I (2009). Effects of head-only exposure of rats to GSM-900 on blood-brain barrier permeability and neuronal degeneration.
Show BibTeX
@article{de_gannes_fp_billaudel_b_taxile_m_haro_e_ruffi_g_lvque_p_veyret_b_lagroye_i_ce3201,
author = {de Gannes FP and Billaudel B and Taxile M and Haro E and Ruffié G and Lévêque P and Veyret B and Lagroye I},
title = {Effects of head-only exposure of rats to GSM-900 on blood-brain barrier permeability and neuronal degeneration},
year = {2009},
doi = {10.3109/17482960802320396},
}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.