8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Brain & Nervous System152 citations

Exposure of rat brain to 915 MHz GSM microwaves induces changes in gene expression but not double stranded DNA breaks or effects on chromatin conformation.

Bioeffects Seen

Belyaev IY, Koch CB, Terenius O, Roxstrom-Lindquist K, Malmgren LO, H Sommer W, Salford LG, Persson BR · 2006

View Original Abstract
Share:

Cell phone radiation altered brain gene activity in just 2 hours at typical exposure levels, affecting critical functions like sleep regulation.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to cell phone radiation for 2 hours at typical usage levels. While no DNA damage occurred, the radiation altered 12 brain genes controlling neurotransmitters, blood-brain barrier function, and melatonin production, showing that brief phone exposure can trigger biological changes in brain cells.

Why This Matters

This study provides compelling evidence that cell phone radiation affects brain function at the cellular level, even without causing obvious DNA damage. The SAR level of 0.4 mW/g is well within the range of typical cell phone use, making these findings directly relevant to everyday exposure. What's particularly significant is that the affected genes control critical brain functions including the blood-brain barrier, which protects the brain from toxins, and melatonin production, which regulates sleep cycles. The reality is that your brain cells are responding to cell phone radiation in measurable ways, even during short exposures. While the researchers didn't find DNA breaks, the gene expression changes they documented represent clear biological effects that warrant serious consideration when evaluating the safety of wireless devices.

Exposure Details

SAR
0.4 W/kg
Source/Device
915 MHz GSM mobile phone
Exposure Duration
2h

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.4 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 4x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 915 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 915 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

We investigated whether exposure of rat brain to microwaves (MWs) of global system for mobile communication (GSM) induces DNA breaks, changes in chromatin conformation and in gene expression.

An exposure installation was used based on a test mobile phone employing a GSM signal at 915 MHz, al...

In cerebellum from all exposed animals, 11 genes were upregulated in a range of 1.34–2.74 fold and o...

The data shows that GSM MWs at 915 MHz did not induce PFGE‐detectable DNA double stranded breaks or changes in chromatin conformation, but affected expression of genes in rat brain cells.

Cite This Study
Belyaev IY, Koch CB, Terenius O, Roxstrom-Lindquist K, Malmgren LO, H Sommer W, Salford LG, Persson BR (2006). Exposure of rat brain to 915 MHz GSM microwaves induces changes in gene expression but not double stranded DNA breaks or effects on chromatin conformation. Bioelectromagnetics. 27:295-306, 2006.
Show BibTeX
@article{iy_2006_exposure_of_rat_brain_30,
  author = {Belyaev IY and Koch CB and Terenius O and Roxstrom-Lindquist K and Malmgren LO and H Sommer W and Salford LG and Persson BR},
  title = {Exposure of rat brain to 915 MHz GSM microwaves induces changes in gene expression but not double stranded DNA breaks or effects on chromatin conformation.},
  year = {2006},
  doi = {10.1002/bem.20216},
  url = {http://onlinelibrary.wiley.com/doi/10.1002/bem.20216/abstract},
}
DOI: 10.1002/bem.20216

Cited By (152 papers)

View all 152 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, cell phone radiation can alter brain gene activity. A 2006 study found that 2 hours of 915 MHz GSM exposure changed the expression of 12 genes in rat brains, affecting neurotransmitter regulation, blood-brain barrier function, and melatonin production without causing DNA damage.
No, this study found no DNA damage from cell phone radiation. Researchers exposed rats to 915 MHz GSM signals for 2 hours and detected no double-strand DNA breaks, though the radiation did alter gene expression in brain cells.
GSM radiation can trigger biological changes in brain cells. A study showed 2 hours of 915 MHz exposure altered 12 brain genes controlling critical functions like neurotransmitters and the blood-brain barrier, indicating cellular-level effects even without DNA damage.
Cell phone radiation can change how brain genes work. Research found that typical phone usage levels altered genes controlling neurotransmitter regulation, blood-brain barrier protection, and melatonin production in rat brains after just 2 hours of 915 MHz GSM exposure.
Mobile phone radiation can alter brain gene expression without damaging DNA. A study revealed that 915 MHz GSM exposure changed 12 genes in rat brains, affecting neurotransmitter systems, blood-brain barrier function, and melatonin production after 2 hours of exposure.