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Effects of GSM and UMTS mobile telephony signals on neuron degeneration and blood-brain barrier permeation in the rat brain.

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Poulletier de Gannes F, Masuda H, Billaudel B, Poque-Haro E, Hurtier A, Lévêque P, Ruffié G, Taxile M, Veyret B, Lagroye I. · 2017

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Cell phone radiation compromised rats' blood-brain barriers 50 days after exposure, suggesting delayed brain protection damage from intensive phone use.

Plain English Summary

Summary written for general audiences

French researchers exposed rats to cell phone radiation (GSM and UMTS signals) for 4 weeks and found that high exposure levels caused the blood-brain barrier to leak 50 days after exposure ended. The blood-brain barrier normally protects the brain from harmful substances in the blood, but this protective shield became compromised at radiation levels equivalent to what humans might experience with very high cell phone use.

Why This Matters

This study adds important evidence to concerns about cell phone radiation's effects on brain protection mechanisms. The researchers found delayed blood-brain barrier damage at exposure levels of 13 W/kg in rats, which they calculated as equivalent to 50 W/kg in humans. Put simply, this suggests that intensive cell phone use over weeks could compromise your brain's natural protective barrier, potentially allowing toxins and other harmful substances to enter brain tissue. What makes this research particularly significant is the delayed effect - the damage appeared 50 days after exposure ended, not immediately. This delayed response pattern mirrors what we've seen with other environmental toxins like tobacco, where health effects often emerge long after initial exposure. The science demonstrates that even after you reduce your EMF exposure, some biological effects may persist or even worsen over time.

Exposure Details

SAR
0.026, 0.26, 2.6, and 13 W/kg
Source/Device
GSM-1800 and UMTS-1950
Exposure Duration
2 h/day, 5 days/week, for 4 weeks

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.026, 0.26, 2.6, and 13 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Severe Concern rangeFCC limit is 62x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1800 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1800 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

Blood-brain barrier (BBB) permeation and neuron degeneration were assessed in the rat brain following exposure to mobile communication radiofrequency (RF) signals (GSM-1800 and UMTS-1950).

Two protocols were used: (i) single 2 h exposure, with rats sacrificed immediately, and 1 h, 1, 7, o...

No adverse impact in terms of BBB leakage or neuron degeneration was observed after single exposures...

Cite This Study
Poulletier de Gannes F, Masuda H, Billaudel B, Poque-Haro E, Hurtier A, Lévêque P, Ruffié G, Taxile M, Veyret B, Lagroye I. (2017). Effects of GSM and UMTS mobile telephony signals on neuron degeneration and blood-brain barrier permeation in the rat brain. Sci Rep. 2017 Nov 14;7(1):15496. doi: 10.1038/s41598-017-15690-1.
Show BibTeX
@article{f_2017_effects_of_gsm_and_1275,
  author = {Poulletier de Gannes F and Masuda H and Billaudel B and Poque-Haro E and Hurtier A and Lévêque P and Ruffié G and Taxile M and Veyret B and Lagroye I. },
  title = {Effects of GSM and UMTS mobile telephony signals on neuron degeneration and blood-brain barrier permeation in the rat brain.},
  year = {2017},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/29138435/},
}
PubMed: 29138435

Cited By (12 papers)

Quick Questions About This Study

French research found that GSM-1800 radiation at 13 W/kg caused significant blood-brain barrier leakage 50 days after exposure ended in rats. This delayed effect occurred at radiation levels equivalent to extremely high human cell phone use, suggesting potential long-term brain protection risks.
Yes, UMTS-1950 radiation at 13 W/kg caused albumin leakage through the blood-brain barrier in rats 50 days post-exposure. The study found both GSM and UMTS signals compromised this protective brain barrier at high exposure levels equivalent to intensive human phone use.
Brain barrier damage appeared 50 days after cell phone radiation exposure ended, not immediately. French researchers found no blood-brain barrier effects during or right after 4 weeks of GSM/UMTS exposure, but significant leakage occurred nearly two months later.
The 13 W/kg exposure level in rat brains equals approximately 50 W/kg in human heads according to this French study. This represents extremely high exposure levels far exceeding typical cell phone use, equivalent to about 4 times normal human brain absorption rates.
No immediate brain damage occurred from 4 weeks of GSM-1800 or UMTS-1950 exposure in this study. Researchers found no neuron degeneration or blood-brain barrier problems during exposure or immediately after, except for one brief UMTS effect at lower power levels.