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

Brain & Nervous System

Local exposure of 849 MHz and 1763 MHz radiofrequency radiation to mouse heads does not induce cell death or cell proliferation in brain.

No Effects Found

Kim TH, Huang TQ, Jang JJ, Kim MH, Kim HJ, Lee JS, Pack JK, Seo JS, Park WY. · 2008

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Chronic cell phone radiation exposure at levels 4 times higher than current limits showed no brain tissue damage in mice.

Plain English Summary

Summary written for general audiences

Researchers exposed mice to cell phone radiation at 849 MHz and 1763 MHz frequencies for up to 12 months, using radiation levels about 4 times higher than current safety limits. They found no changes in brain cell death, cell growth, or tissue damage compared to unexposed mice. This suggests that chronic exposure to these specific frequencies at high levels may not cause detectable brain tissue changes in mice.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 849 MHz - 1.76 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 849 MHz - 1.76 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

The study examined exposure from: 849 MHz or 1763 MHz Duration: 12 Months

Study Details

The aim of this study is to investigate Local exposure of 849 MHz and 1763 MHz radiofrequency radiation to mouse heads does not induce cell death or cell proliferation in brain.

We established a carousel-type exposure chamber for 849 MHz or 1763 MHz of mobile phone RF radiation...

During this period, the body weights of 3 groups-sham, 849 MHz RF, and 1763 MHz RF-did not show any ...

From these data, we conclude that the chronic exposure to 849 MHz and 1763 MHz RF radiation at a 7.8 W/kg specific absorption rate (SAR) could not induce cellular alterations such as proliferation, death, and reactive gliosis.

Cite This Study
Kim TH, Huang TQ, Jang JJ, Kim MH, Kim HJ, Lee JS, Pack JK, Seo JS, Park WY. (2008). Local exposure of 849 MHz and 1763 MHz radiofrequency radiation to mouse heads does not induce cell death or cell proliferation in brain. Exp Mol Med. 40(3):294-303, 2008.
Show BibTeX
@article{th_2008_local_exposure_of_849_3141,
  author = {Kim TH and Huang TQ and Jang JJ and Kim MH and Kim HJ and Lee JS and Pack JK and Seo JS and Park WY.},
  title = {Local exposure of 849 MHz and 1763 MHz radiofrequency radiation to mouse heads does not induce cell death or cell proliferation in brain.},
  year = {2008},
  
  url = {https://www.nature.com/articles/emm200834},
}

Quick Questions About This Study

No, a 2008 study found that 849 MHz radiofrequency radiation did not cause brain cell death in mice. Researchers exposed mice to this frequency for up to 12 months at levels 4 times higher than current safety limits and detected no changes in brain cell death compared to unexposed mice.
Research shows 1763 MHz radiation exposure for 12 months does not damage brain tissue in mice. Scientists found no changes in brain cell growth, cell death, or tissue structure after chronic exposure at 7.8 W/kg SAR, which is significantly higher than typical human exposure levels.
Studies indicate chronic exposure to 849 MHz and 1763 MHz radiation does not affect hippocampus function. Researchers found no changes in NeuN and GFAP protein expression or distribution in the hippocampus after 6-12 months of exposure at high radiation levels.
Researchers tested 849 MHz radiation at 7.8 W/kg SAR for brain safety effects. This specific absorption rate is approximately 4 times higher than current safety limits. The study found no brain cell changes, suggesting this high exposure level did not cause detectable tissue damage in mice.
No, 1763 MHz radiofrequency radiation does not cause reactive gliosis in mouse brains. Scientists exposed mice for up to 12 months and found no evidence of glial cell activation or inflammatory responses in brain tissue, indicating no detectable neuroinflammatory effects from this frequency.