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DNA & Genetic Damage

Measurement of DNA damage in mammalian cells exposed in vitro to radiofrequency fields at sars of 3-5 w/kg.

No Effects Found

Li L, Bisht KS, LaGroye I, Zhang P, Straube WL, Moros EG, Roti Roti JL. · 2001

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This study found no DNA damage from 24-hour RF exposure at cell phone-level intensities, but doesn't address long-term cumulative effects.

Plain English Summary

Summary written for general audiences

Researchers exposed mouse cells to radiofrequency radiation at levels of 3.2-5.1 watts per kilogram (similar to cell phone exposure levels) for up to 24 hours to see if it would damage DNA. Using a sensitive test called the comet assay, they found no detectable DNA damage in the exposed cells compared to unexposed control cells. This suggests that RF exposure at these specific levels and durations may not cause immediate genetic damage in laboratory conditions.

Why This Matters

This study provides important data on DNA damage at RF exposure levels that mirror real-world cell phone use, since SAR levels of 3-5 W/kg are within the range of typical mobile device emissions. However, the research has notable limitations that affect its broader applicability. The study examined only immediate DNA damage over relatively short exposure periods (maximum 24 hours) and used a single cell line under controlled laboratory conditions. What this means for you is that while these results are reassuring for acute exposure scenarios, they don't address the potential for cumulative genetic damage from years of daily RF exposure that characterizes modern device use. The reality is that DNA damage research remains mixed, with some studies finding effects and others, like this one, finding none. The key variables appear to be exposure duration, frequency, modulation, and cellular conditions.

Exposure Details

SAR
3.2 - 5.1 W/kg
Source/Device
847.74 MHz (CDMA) and 835.62 (FDMA)
Exposure Duration
2, 4 or 24 h

Exposure Context

This study used 3.2 - 5.1 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: 3.2 - 5.1 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)This level is 2 times the FCC limit
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 847.7 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 847.7 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

In the present study, we determined whether exposure of mammalian cells to 3.2-5.1 W/kg specific absorption rate (SAR) radiofrequency fields could induce DNA damage in murine C3H 10T(1/2) fibroblasts.

Cell cultures were exposed to 847.74 MHz code-division multiple access (CDMA) and 835.62 frequency-d...

Using the alkaline comet assay to measure DNA damage, we found no statistically significant differen...

Our results show that exposure of cultured C3H 10T(1/2) cells at 37 degrees C CDMA or FDMA at SAR values of up to 5.1 W/kg did not induce measurable DNA damage.

Cite This Study
Li L, Bisht KS, LaGroye I, Zhang P, Straube WL, Moros EG, Roti Roti JL. (2001). Measurement of DNA damage in mammalian cells exposed in vitro to radiofrequency fields at sars of 3-5 w/kg. Radiat Res 156:328-332, 2001.
Show BibTeX
@article{l_2001_measurement_of_dna_damage_2918,
  author = {Li L and Bisht KS and LaGroye I and Zhang P and Straube WL and Moros EG and Roti Roti JL.},
  title = {Measurement of DNA damage in mammalian cells exposed in vitro to radiofrequency fields at sars of 3-5 w/kg.},
  year = {2001},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/11500143/},
}
PubMed: 11500143

Cited By (61 papers)

View all 61 citing papers on Semantic Scholar

Quick Questions About This Study

No, a 2001 study found that mouse cells exposed to 847 MHz CDMA radiation at 3.2-5.1 watts per kilogram for up to 24 hours showed no detectable DNA damage. Researchers used the sensitive comet assay to measure genetic damage and found no significant differences between exposed and control cells.
Research shows that 835 MHz FDMA radiation at cell phone-like exposure levels (up to 5.1 W/kg) does not cause measurable DNA damage in cultured mouse cells. Even after 24-hour exposures, scientists detected no significant genetic damage using precise laboratory testing methods.
Laboratory studies demonstrate that mouse cells can be exposed to radiofrequency radiation at 5.1 watts per kilogram for up to 24 hours without detectable DNA damage. Testing at 2, 4, and 24-hour intervals all showed no significant genetic effects compared to unexposed cells.
The alkaline comet assay, a sensitive test for DNA damage, found no genetic harm when mouse cells were exposed to cell phone frequencies (835-847 MHz) at typical exposure levels. This laboratory method can detect subtle DNA changes but showed no effects from radiofrequency radiation.
No, C3H 10T1/2 mouse cells showed no DNA damage when exposed to both CDMA (847 MHz) and FDMA (835 MHz) radiation at levels up to 5.1 W/kg. Researchers tested both actively growing and resting cells with identical negative results for genetic damage.