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Brain & Nervous System

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

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The study failed to replicate previous reports of GSM-900-induced blood-brain barrier disruption and neuronal damage in rats under the tested conditions.

Plain English Summary

Summary written for general audiences

This study examined whether a 2-hour exposure to GSM-900 mobile phone signals would cause blood-brain barrier permeability changes and neuronal degeneration in rats, as previously reported by Salford et al. The researchers exposed rats at various SAR levels and evaluated outcomes at 14 and 50 days post-exposure, finding no statistically significant albumin leakage, neuronal degeneration, or apoptotic neurons across tested groups, contradicting the earlier findings.

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
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},
  
}
DOI: 10.3109/17482960802320396PubMed: 19708785

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.