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Studying gene expression profile of rat neuron exposed to 1800MHz radiofrequency electromagnetic fields with cDNA microassay.

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Zhao R, Zhang S, Xu Z, Ju L, Lu D, Yao G. · 2007

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Exposure to 1800 MHz radiofrequency electromagnetic fields altered gene expression in rat neurons, with 24 genes up-regulated and 10 down-regulated.

Plain English Summary

Summary written for general audiences

Researchers investigated whether 1800 MHz radiofrequency electromagnetic fields could influence gene expression in rat neurons. Among 1200 candidate genes, 24 were up-regulated and 10 were down-regulated after 24 hours of intermittent exposure at a SAR of 2 W/kg. The researchers concluded that gene expression in rat neurons could be altered by exposure to radiofrequency electromagnetic fields under their experimental conditions.

Why This Matters

The study used an Affymetrix Rat Neurobiology U34 array to look at changes in gene expression in rat neurons. The radiofrequency signal was pulsed at 1800 MHz and modulated by 217 Hz. The altered genes were associated with multiple cellular functions, including cytoskeleton, signal transduction pathways, and metabolism. The microarray findings were further confirmed using quantitative real-time polymerase chain reaction.

Exposure Details

SAR
2 W/kg
Source/Device
1800 MHz modulated by 217 Hz
Exposure Duration
24h

Exposure Context

This study used 2 W/kg for SAR (device absorption):

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 2 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)This level is 1 times the FCC limit
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 217 Hz - 1.80 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 217 Hz - 1.80 GHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

The aim of this investigation was to determine whether 1800 MHz radiofrequency electromagnetic fields (RF EMF) can influence the gene expression of neuron.

Affymetrix Rat Neurobiology U34 array was applied to investigate the changes of gene expression in r...

Among 1200 candidate genes, 24 up-regulted genes and 10 down-regulated genes were identified after 2...

The present results indicated that the gene expression of rat neuron could be altered by exposure to RF EMF under our experimental conditions.

Cite This Study
Zhao R, Zhang S, Xu Z, Ju L, Lu D, Yao G. (2007). Studying gene expression profile of rat neuron exposed to 1800MHz radiofrequency electromagnetic fields with cDNA microassay. Toxicology 235:167-175, 2007.
Show BibTeX
@article{r_2007_studying_gene_expression_profile_25,
  author = {Zhao R and Zhang S and Xu Z and Ju L and Lu D and Yao G.},
  title = {Studying gene expression profile of rat neuron exposed to 1800MHz radiofrequency electromagnetic fields with cDNA microassay.},
  year = {2007},
  
  url = {http://www.sciencedirect.com/science/article/pii/S0300483X07001837},
}

Quick Questions About This Study

The study examined gene expression in rat neurons.
Out of 1200 candidate genes, 24 were up-regulated and 10 were down-regulated.
The altered genes were associated with cellular functions such as cytoskeleton structure, signal transduction pathways, and metabolism.
The results were confirmed using quantitative real-time polymerase chain reaction.
Neurons were exposed intermittently for 24 hours at an average specific absorption rate of 2 W/kg.