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Mobile phone electromagnetic radiation activates MAPK signaling and regulates viability in Drosophila.

Bioeffects Seen

Lee KS, Choi JS, Hong SY, Son TH, Yu K. · 2008

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Cell phone radiation at current safety limits activated stress responses in fruit flies, while higher levels caused brain cell death.

Plain English Summary

Summary written for general audiences

Researchers exposed fruit flies to cell phone radiation at two different intensities to see how it affected their survival and cellular responses. At the current safety limit (1.6 W/kg), most flies survived 30 hours of exposure, but at higher levels (4.0 W/kg), flies began dying after 12 hours. The radiation triggered different cellular stress pathways depending on the intensity, with higher levels causing brain cell death.

Why This Matters

This study provides compelling evidence that even current safety limits for cell phone radiation trigger measurable biological responses in living organisms. The researchers found that exposure at 1.6 W/kg, which is the ANSI safety standard, activated survival signaling pathways in fruit flies, while higher exposures activated cell death pathways and caused brain damage. What makes this particularly significant is that fruit flies share many fundamental cellular mechanisms with humans, making them a valuable model for understanding potential health effects. The fact that 'safe' exposure levels still triggered stress responses and activated specific signaling pathways suggests our current safety standards may not account for all biological effects. While we can't directly extrapolate from flies to humans, this research adds to the growing body of evidence that EMF exposure causes measurable biological changes at levels considered safe by regulatory agencies.

Exposure Details

SAR
1.6 and 4 W/kg
Source/Device
835 MHz
Exposure Duration
continuous for 6, 12, 18, 24, 30, and 36 h

Exposure Context

This study used 1.6 and 4 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: 1.6 and 4 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 835 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 835 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

In this report, we show biological effects of the mobile phone 835 MHz electromagnetic field (EMF) in the Drosophila model system.

When flies were exposed to the specific absorption rate (SAR) 1.6 W/kg, which is the proposed expos...

These findings demonstrate that the exposure limit on electromagnetic radiation proposed by ANSI triggered ERK‐survival signaling but the strong electromagnetic radiation activated JNK‐apoptotic signaling in Drosophila.

Cite This Study
Lee KS, Choi JS, Hong SY, Son TH, Yu K. (2008). Mobile phone electromagnetic radiation activates MAPK signaling and regulates viability in Drosophila. Bioelectromagnetics. 29(5):371-379, 2008.
Show BibTeX
@article{ks_2008_mobile_phone_electromagnetic_radiation_120,
  author = {Lee KS and Choi JS and Hong SY and Son TH and Yu K.},
  title = {Mobile phone electromagnetic radiation activates MAPK signaling and regulates viability in Drosophila.},
  year = {2008},
  doi = {10.1002/bem.20395},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.20395},
}
DOI: 10.1002/bem.20395

Cited By (45 papers)

Quick Questions About This Study

A 2008 study found that 835 MHz radiation at 4.0 W/kg killed fruit flies after 12 hours of exposure. However, at the current safety limit of 1.6 W/kg, over 90% of flies survived even after 30 hours of continuous exposure.
Research shows 835 MHz radiation activates different stress response pathways depending on intensity. Lower levels (1.6 W/kg) trigger ERK survival signaling, while higher levels (4.0 W/kg) activate JNK pathways that lead to programmed cell death.
Studies using fruit flies show that 835 MHz radiation at current safety limits (1.6 W/kg) does not cause significant brain cell death. However, exposure at 4.0 W/kg does increase apoptotic brain cells and triggers cell death pathways.
Yes, research demonstrates that 835 MHz cell phone radiation increases reactive oxygen species production in fruit flies at both safety limit levels (1.6 W/kg) and higher intensities, indicating oxidative stress responses in living organisms.
Studies show 835 MHz radiation activates MAPK signaling pathways, specifically ERK and JNK kinases, but not p38. The activation pattern depends on exposure intensity, with different pathways triggered at safety limits versus higher power levels.