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DNA & Genetic Damage141 citations

DNA damage in rat brain cells after in vivo exposure to 2450 MHz electromagnetic radiation and various methods of euthanasia.

No Effects Found

Malyapa RS, Ahern EW, Bi C, Straube WL, LaRegina M, Pickard WF, Roti RotiJL · 1998

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This replication study found no DNA damage from 2-hour microwave exposure at levels higher than typical cell phone use.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and some WiFi devices) for 2 hours to see if it would damage DNA in brain cells, as a previous study had suggested. They found no DNA damage in either the brain's cortex or hippocampus regions, contradicting the earlier research. This study suggests that short-term exposure to this type of radiation at moderate levels may not cause immediate genetic damage to brain cells.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2.45 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2.45 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

The study examined exposure from: 2450 MHz Duration: 2h

Study Details

The present study was done to confirm the reported observation that low-intensity acute exposure to 2450 MHz radiation causes DNA single-strand breaks (Lai and Singh, Bioelectromagnetics 16, 207-210, 1995).

Male Sprague-Dawley rats weighing approximately 250 g were irradiated with 2450 MHz continuous-wave ...

Irrespective of whether the rats were euthanized by CO2 asphyxia or decapitated by guillotine, no si...

Furthermore, we did not confirm the observation that DNA damage is produced in cells of the rat cerebral cortex or the hippocampus after a 2-h exposure to 2450 MHz CW microwaves or at 4 h after the exposure.

Cite This Study
Malyapa RS, Ahern EW, Bi C, Straube WL, LaRegina M, Pickard WF, Roti RotiJL (1998). DNA damage in rat brain cells after in vivo exposure to 2450 MHz electromagnetic radiation and various methods of euthanasia. Radiat Res 149(6):637-645, 1998.
Show BibTeX
@article{rs_1998_dna_damage_in_rat_3223,
  author = {Malyapa RS and Ahern EW and Bi C and Straube WL and LaRegina M and Pickard WF and Roti RotiJL},
  title = {DNA damage in rat brain cells after in vivo exposure to 2450 MHz electromagnetic radiation and various methods of euthanasia.},
  year = {1998},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/9611103/},
}
PubMed: 9611103

Cited By (141 papers)

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Quick Questions About This Study

No, a 1998 study found that 2-hour exposure to 2450 MHz microwave radiation (the same frequency as microwave ovens) caused no DNA damage in rat brain cells. Researchers examined both the cortex and hippocampus regions and found no significant genetic damage from this short-term exposure.
Yes, researchers found guillotine euthanasia produces more reliable DNA damage measurements than CO2 asphyxiation. Rats euthanized with CO2 showed more intrinsic DNA damage and experimental variation, making guillotine the preferred method for accurate DNA damage studies in laboratory animals.
Research suggests no immediate damage occurs. A study using 2450 MHz radiation (similar to WiFi frequencies) found no DNA damage in rat brain cells after 2-hour exposure or even 4 hours post-exposure, indicating short-term exposure may not cause immediate genetic damage.
Yes, hippocampus cells appear resistant to 2450 MHz microwave damage. Researchers specifically examined this memory-critical brain region along with the cortex and found no DNA damage after 2-hour exposure, suggesting these important brain cells may withstand moderate microwave radiation levels.
The 1998 study used improved methodology that eliminated experimental artifacts found in previous research. By comparing different euthanasia methods and controlling for intrinsic DNA damage, researchers demonstrated that earlier findings of microwave-induced brain DNA damage were likely due to methodological issues rather than radiation effects.