Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.
Measurement of DNA damage after exposure to electromagnetic radiation in the cellular phone communication frequency band (835.62 and 847.74 MHz).
Malyapa RS, Ahern EW, Straube WL, Moros EG, Pickard WF, Roti Roti JL. · 1997
View Original AbstractCell phone radiation at 0.6 W/kg caused no detectable DNA damage in laboratory cells, though this doesn't rule out other biological effects.
Plain English Summary
Researchers exposed two types of cells (mouse and human) to cell phone radiation at frequencies used by mobile phones (835-847 MHz) for up to 24 hours to see if it caused DNA damage. They found no DNA damage in either cell type when exposed at a specific absorption rate (SAR) of 0.6 W/kg, which is below current regulatory limits. This suggests that cell phone radiation at this level may not directly break DNA strands in laboratory conditions.
Why This Matters
This 1997 study represents an important early investigation into whether cell phone radiation directly damages DNA, using the sensitive alkaline comet assay to detect even minor DNA breaks. The 0.6 W/kg exposure level is below the current FCC limit of 1.6 W/kg for cell phones, making these findings relevant to real-world exposures. However, this negative result should be viewed within the broader context of EMF research. While this study found no DNA damage at the cellular level, it examined only direct DNA breaks and didn't assess other potential biological effects like oxidative stress, protein changes, or long-term cellular responses. The science demonstrates that EMF effects can be subtle and may not always manifest as immediate DNA damage, which is why researchers continue investigating multiple biological endpoints across different exposure scenarios.
Exposure Details
- SAR
- 0.6 W/kg
- Source/Device
- 835.62 and 847.74 MHz
- Exposure Duration
- 24 h
Exposure Context
This study used 0.6 W/kg for SAR (device absorption):
- 1.5x above the Building Biology guideline of 0.4 W/kg
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 Details
Mouse C3H 10T1/2 fibroblasts and human glioblastoma U87MG cells were exposed to cellular phone communication frequency radiations to investigate whether such exposure produces DNA damage in in vitro cultures
Two types of frequency modulations were studied: frequency-modulated continuous-wave (FMCW), with a ...
No significant differences were observed between the test group exposed to FMCW or CDMA radiation an...
Our results indicate that exposure of cultured mammalian cells to cellular phone communication frequencies under these conditions at an SAR of 0.6 W/kg does not cause DNA damage as measured by the alkaline comet assay.
Show BibTeX
@article{rs_1997_measurement_of_dna_damage_2921,
author = {Malyapa RS and Ahern EW and Straube WL and Moros EG and Pickard WF and Roti Roti JL.},
title = {Measurement of DNA damage after exposure to electromagnetic radiation in the cellular phone communication frequency band (835.62 and 847.74 MHz).},
year = {1997},
url = {https://meridian.allenpress.com/radiation-research/article-abstract/148/6/618/40733/Measurement-of-DNA-Damage-after-Exposure-to},
}