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DNA & Genetic Damage

Phosphorylation and gene expression of p53 are not affected in human cells exposed to 2.1425 GHz band CW or W-CDMA modulated radiation allocated to mobile radio base stations.

No Effects Found

Hirose H, Sakuma N, Kaji N, Suhara T, Sekijima M, Nojima T, Miyakoshi J. · 2006

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Cell tower-level RF radiation up to 10 times safety limits showed no DNA damage or cell death in human cells over 48 hours.

Plain English Summary

Summary written for general audiences

Researchers exposed human brain and lung cells to radiofrequency radiation at 2.14 GHz (similar to cell tower frequencies) for up to 48 hours to see if it would trigger cell death or DNA damage responses. They tested exposure levels from 0.08 to 0.8 watts per kilogram - with the lowest level matching international safety limits for public exposure. The study found no evidence that this RF radiation caused cells to die, damaged DNA, or activated stress response pathways even at levels 10 times higher than safety guidelines.

Why This Matters

This study represents the type of rigorous laboratory research needed to understand RF radiation effects at realistic exposure levels. The researchers specifically tested the 2.14 GHz frequency used by 3G cell towers and examined p53, a crucial protein that acts as the cell's 'guardian' against DNA damage. What makes this research particularly relevant is that the lowest exposure level (0.08 W/kg) matches the international safety limit for whole-body public exposure, while higher levels reached 0.8 W/kg - still within ranges that could occur from multiple wireless sources. The absence of cellular stress responses even at these elevated levels adds to the body of evidence suggesting that current safety standards may be appropriately protective for the specific biological endpoints examined in this study.

Exposure Details

SAR
0.08, 0.25, 0.8 W/kg
Source/Device
2.1425 GHz
Exposure Duration
24 or 48 hours, and 28 hours

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.08, 0.25, 0.8 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Severe Concern range (Building Biology)FCC limit is 20 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2.14 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2.14 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

A large-scale in vitro study focusing on low-level radiofrequency (RF) fields from mobile radio base stations employing the International Mobile Telecommunication 2000 (IMT-2000) cellular system was conducted to test the hypothesis that modulated RF fields induce apoptosis or other cellular stress response that activate p53 or the p53-signaling pathway.

First, we evaluated the response of human cells to microwave exposure at a specific absorption rate ...

Under the RF field exposure conditions described above, no significant differences in the percentage...

Our results confirm that exposure to low-level RF signals up to 800 mW/kg does not induce p53-dependent apoptosis, DNA damage, or other stress response in human cells.

Cite This Study
Hirose H, Sakuma N, Kaji N, Suhara T, Sekijima M, Nojima T, Miyakoshi J. (2006). Phosphorylation and gene expression of p53 are not affected in human cells exposed to 2.1425 GHz band CW or W-CDMA modulated radiation allocated to mobile radio base stations. Bioelectromagnetics.27(6):494-504, 2006.
Show BibTeX
@article{h_2006_phosphorylation_and_gene_expression_3085,
  author = {Hirose H and Sakuma N and Kaji N and Suhara T and Sekijima M and Nojima T and Miyakoshi J.},
  title = {Phosphorylation and gene expression of p53 are not affected in human cells exposed to 2.1425 GHz band CW or W-CDMA modulated radiation allocated to mobile radio base stations.},
  year = {2006},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/16715525/},
}
PubMed: 16715525

Cited By (53 papers)

View all 53 citing papers on Semantic Scholar

Quick Questions About This Study

No, a 2006 study found that 2.14 GHz radiation from cell towers does not trigger cell death in human brain and lung cells. Researchers exposed cells for up to 48 hours at levels up to 10 times higher than safety guidelines without observing any increase in programmed cell death.
Research shows that cell tower radiation at 2.14 GHz does not damage DNA even at exposure levels of 0.8 watts per kilogram. A controlled study found no activation of p53 stress response pathways or DNA damage markers in human cells after 48-hour exposure.
Studies indicate 2.1425 GHz radiation from mobile base stations appears safe for human cells. Research found no significant cellular stress responses, DNA damage, or cell death in human brain and lung cells exposed to this frequency for extended periods at various power levels.
No, W-CDMA modulated signals at 2.14 GHz do not cause genetic damage in human brain cells. Laboratory testing showed no changes in gene expression related to cell death or DNA repair pathways, even at exposure levels exceeding public safety limits.
Human cells can handle 2.14 GHz exposure for at least 48 hours without showing damage. Research demonstrated that continuous exposure to cell tower frequencies for this duration produced no detectable cellular stress responses or genetic changes in brain and lung tissue.