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Activity and expression of acetylcholinesterase in PC12 cells exposed to intermittent 1.8 GHz 217-GSM mobile phone signal.

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Valbonesi P, Franzellitti S, Bersani F, Contin A, Fabbri E. · 2016

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Cell phone radiation at legal limits increased a critical brain enzyme by 40%, potentially affecting memory and learning functions.

Plain English Summary

Summary written for general audiences

Italian researchers exposed rat brain cells to cell phone radiation at the legal safety limit for 24 hours and found that a key brain enzyme called acetylcholinesterase increased by 40%. This enzyme is crucial for memory, learning, and proper brain function, and disruptions to it are linked to neurodegenerative diseases like Alzheimer's.

Why This Matters

This study provides concerning evidence that cell phone radiation can directly affect brain chemistry at exposure levels considered 'safe' by regulators. The 2 W/kg SAR used in this research represents the legal limit for cell phones in many countries, meaning millions of people may be experiencing these effects during normal phone use. What makes this finding particularly significant is that acetylcholinesterase disruption is a hallmark of neurological disorders. The researchers found this effect occurred without changes in gene expression, suggesting the radiation directly interferes with enzyme function rather than cellular programming. While this was a laboratory study using isolated cells, it adds to a growing body of evidence that our current safety standards may not adequately protect the nervous system from RF radiation effects.

Exposure Details

SAR
2 W/kg
Source/Device
1.8 GHz 217-GSM
Exposure Duration
24 hours

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 rangeFCC limit is 1x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.80 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.80 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

We investigated possible alterations of enzymatic activity, gene and protein expression of AChE in neuronal-like cells exposed to a 1.8 GHz Global System for Mobile Communication (GSM) modulated signal (217-GSM).

Rat PC12 cells were exposed for 24 h to 1.8 GHz 217-GSM signal. Specific adsorption rate (SAR) was 2...

AChE enzymatic activity increased of 1.4-fold in PC12 cells exposed to 217-GSM signal for 24 h, whil...

Our results provide the first evidence of effects on AChE activity after in vitro exposure of mammalian cells to the RF-EMF generated by GSM mobile phones, at the SAR value 2 W/kg. The obtained evidence promotes further investigations on AChE as a possible target of RF-EMF and confirm the ability of 1.8 GHz 217-GSM signal to induce biological effects in different mammalian cells.

Cite This Study
Valbonesi P, Franzellitti S, Bersani F, Contin A, Fabbri E. (2016). Activity and expression of acetylcholinesterase in PC12 cells exposed to intermittent 1.8 GHz 217-GSM mobile phone signal. Int J Radiat Biol. 92(1):1-10.
Show BibTeX
@article{p_2016_activity_and_expression_of_1397,
  author = {Valbonesi P and Franzellitti S and Bersani F and Contin A and Fabbri E.},
  title = {Activity and expression of acetylcholinesterase in PC12 cells exposed to intermittent 1.8 GHz 217-GSM mobile phone signal.},
  year = {2016},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/26630175/},
}
PubMed: 26630175

Cited By (17 papers)

Quick Questions About This Study

Yes, Italian researchers found that 24-hour exposure to 1.8 GHz GSM radiation at legal safety limits increased acetylcholinesterase enzyme activity by 40% in rat brain cells. This enzyme is crucial for memory, learning, and proper brain function.
Research shows that cell phone radiation at 2 W/kg SAR (the legal safety limit) can increase acetylcholinesterase enzyme activity by 1.4-fold in brain cells after 24 hours of exposure, potentially affecting memory and cognitive function.
PC12 rat brain cells exposed to GSM phone signals for 24 hours showed a 40% increase in acetylcholinesterase enzyme activity. This enzyme disruption is linked to neurodegenerative diseases like Alzheimer's and affects memory formation.
While 217-GSM radiation increased acetylcholinesterase enzyme activity by 40%, it didn't affect the actual production pathways of the enzyme. The radiation appears to modify existing enzyme function rather than creating more enzymes.
Yes, this 2016 study provides the first evidence that acetylcholinesterase enzyme activity is affected by mobile phone radiation. The 40% increase suggests this brain enzyme may be particularly sensitive to GSM signals.