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Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Cellular Effects

2-GHz band CW and W-CDMA modulated radiofrequency fields have no significant effect on cell proliferation and gene expression profile in human cells.

No Effects Found

Sekijima M, Takeda H, Yasunaga K, Sakuma N, Hirose H, Nojima T, Miyakoshi J. · 2010

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This study found no cellular damage from 3G-level RF exposure within safety limits, but represents just one piece of mixed research.

Plain English Summary

Summary written for general audiences

Japanese researchers exposed human brain cells and lung cells to 2.1 GHz radiofrequency radiation (similar to 3G cell phones) for up to 96 hours at various power levels. They found no significant changes in cell growth, survival, or gene expression patterns compared to unexposed cells. The study suggests that RF exposure within current safety guidelines doesn't trigger obvious cellular stress responses in laboratory conditions.

Why This Matters

This study adds to a mixed body of research on cellular effects of RF radiation, but its findings require careful context. While the researchers found no significant cellular changes at exposure levels within current safety guidelines, this represents just one snapshot of potential biological effects. The reality is that cellular studies have shown both positive and negative results for RF effects, and laboratory conditions don't always reflect the complex, long-term exposures we experience in daily life. What this means for you is that while this particular study is reassuring, it doesn't settle the broader question of RF safety. The science demonstrates that biological effects can be subtle, cumulative, or dependent on specific exposure conditions that weren't tested here.

Exposure Details

SAR
0.08, 0.25, 0.8 W/kg
Source/Device
2.1425 GHz
Exposure Duration
96 h

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

We investigated the mechanisms by which radiofrequency (RF) fields exert their activity, and the changes in both cell proliferation and the gene expression profile in the human cell lines, A172 (glioblastoma), H4 (neuroglioma), and IMR-90 (fibroblasts from normal fetal lung) following exposure to 2.1425 GHz continuous wave (CW) and Wideband Code Division Multiple Access (W-CDMA) RF fields at three field levels.

During the incubation phase, cells were exposed at the specific absorption rates (SARs) of 80, 250, ...

No significant differences in cell growth or viability were observed between any test group exposed ...

These results suggest that RF exposure up to the limit of whole-body average SAR levels as specified in the ICNIRP guidelines is unlikely to elicit a general stress response in the tested cell lines under these conditions.

Cite This Study
Sekijima M, Takeda H, Yasunaga K, Sakuma N, Hirose H, Nojima T, Miyakoshi J. (2010). 2-GHz band CW and W-CDMA modulated radiofrequency fields have no significant effect on cell proliferation and gene expression profile in human cells. J Radiat Res. 51(3):277-284, 2010.
Show BibTeX
@article{m_2010_2ghz_band_cw_and_3389,
  author = {Sekijima M and Takeda H and Yasunaga K and Sakuma N and Hirose H and Nojima T and Miyakoshi J.},
  title = {2-GHz band CW and W-CDMA modulated radiofrequency fields have no significant effect on cell proliferation and gene expression profile in human cells.},
  year = {2010},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/20215713/},
}
PubMed: 20215713

Cited By (26 papers)

View all 26 citing papers on Semantic Scholar

Quick Questions About This Study

No, Japanese researchers found that 2.1 GHz W-CDMA radiation (similar to 3G signals) had no significant effects on human brain and lung cell growth or survival after 96 hours of exposure at various power levels within safety guidelines.
A 2010 study found that 2.1425 GHz radiation exposure for up to 96 hours altered less than 1% of available genes in human cells, showing no general stress response within current safety limits.
Research shows 2.1425 GHz continuous wave radiation at SAR levels within ICNIRP guidelines does not act as an acute cytotoxicant, causing no significant changes in cell proliferation or viability in laboratory conditions.
Japanese scientists exposed human brain and lung cells to 2.1 GHz radiation for up to 96 hours without observing significant cellular damage or stress responses, suggesting safety within current exposure guidelines.
Yes, the 2010 Sekijima study found that RF exposure up to ICNIRP whole-body average SAR limits at 2.1425 GHz is unlikely to trigger general stress responses in human cells under laboratory conditions.