Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.
Amyotrophic Lateral Sclerosis (ALS) and extremely-low frequency (ELF) magnetic fields: a study in the SOD-1 transgenic mouse model
No Effects Found
Authors not listed · 2008
Seven weeks of power line frequency magnetic field exposure did not accelerate ALS in genetically susceptible mice.
Plain English Summary
Summary written for general audiences
Researchers exposed genetically modified mice predisposed to ALS (Lou Gehrig's disease) to power line frequency magnetic fields for 7 weeks before disease onset. The study found no evidence that 50 Hz magnetic field exposure at levels of 100 or 1000 microTesla affected disease progression, motor function, or survival time. This controlled animal study failed to support epidemiological findings suggesting a link between occupational EMF exposure and ALS.
Exposure Information
Cite This Study
Unknown (2008). Amyotrophic Lateral Sclerosis (ALS) and extremely-low frequency (ELF) magnetic fields: a study in the SOD-1 transgenic mouse model.
Show BibTeX
@article{amyotrophic_lateral_sclerosis_als_and_extremely_low_frequency_elf_magnetic_fields_a_study_in_the_sod_1_transgenic_mouse_model_ce1413,
author = {Unknown},
title = {Amyotrophic Lateral Sclerosis (ALS) and extremely-low frequency (ELF) magnetic fields: a study in the SOD-1 transgenic mouse model},
year = {2008},
doi = {10.3109/17482960802320396},
}Quick Questions About This Study
No, this study found that 7 weeks of 50 Hz magnetic field exposure at 100 and 1000 microTesla did not affect disease progression, motor performance, or lifespan in SOD-1 transgenic mice predisposed to ALS.
The researchers tested two magnetic field strengths: 100 microTesla and 1000 microTesla at 50 Hz frequency. These levels are comparable to occupational exposures near power lines and industrial electrical equipment.
This mouse study found no EMF effects on ALS, while some human epidemiological studies suggest associations. However, the 7-week mouse exposure was much shorter than decades-long human occupational exposures.
SOD-1 transgenic mice carry a mutated gene that causes them to develop ALS-like symptoms. This allows researchers to study potential disease triggers in a controlled laboratory setting with genetically susceptible animals.
The mice were exposed to 50 Hz magnetic fields for 7 weeks before clinical signs of ALS appeared. This short duration contrasts with typical human occupational exposures lasting years or decades.