Effect of 835 MHz radiofrequency radiation exposure on calcium binding proteins in the hippocampus of the mouse brain

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Maskey D, Kim M, Aryal B, Pradhan J, Choi IY, Park KS, Son T, Hong SY, Kim SB, Kim HG, Kim MJ. · 2010

One month of cell phone frequency exposure caused nearly complete loss of memory-critical brain cells in mice at radiation levels near current safety limits.

Plain English Summary

Summary written for general audiences

Researchers exposed mice to cell phone radiation (835 MHz) for one month and found almost complete loss of brain cells in the hippocampus, the region responsible for memory and learning. This suggests cell phone radiation may disrupt brain function and potentially affect memory formation.

Why This Matters

This study reveals concerning evidence that cell phone radiation can cause structural damage to critical brain regions involved in memory formation. The 835 MHz frequency used is very close to frequencies used by modern cellular networks, and the exposure levels (1.6-4.0 W/kg SAR) bracket the 2.0 W/kg safety limit set by the FCC. What makes this research particularly significant is the finding of actual cell loss in the hippocampus after one month of daily exposure. The hippocampus is essential for forming new memories and spatial navigation, and pyramidal cell loss in this region is associated with cognitive decline and memory disorders. While this was an animal study, the biological mechanisms involved - disruption of calcium homeostasis in neurons - are fundamental processes shared across mammalian species, making these findings relevant to human health concerns about long-term wireless device use.

Exposure Details

SAR: 4, 1.6 W/kg
Source/Device: 835 MHz
Exposure Duration: 1 month

Exposure Context

This study used 4, 1.6 W/kg for SAR (device absorption):

4x 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

To study the effect of 835 MHz radiofrequency radiation exposure on calcium binding proteins in the hippocampus of the mouse brain.

Worldwide expansion of mobile phones and electromagnetic field (EMF) exposure has raised question of...

Body weights did not change significantly. CB immunoreactivity (IR) displayed moderate staining of c...

Cite This Study

Maskey D, Kim M, Aryal B, Pradhan J, Choi IY, Park KS, Son T, Hong SY, Kim SB, Kim HG, Kim MJ. (2010). Effect of 835 MHz radiofrequency radiation exposure on calcium binding proteins in the hippocampus of the mouse brain Brain Res.1313:232-241, 2010.

Show BibTeX

@article{d_2010_effect_of_835_mhz_1187,
  author = {Maskey D and Kim M and Aryal B and Pradhan J and Choi IY and Park KS and Son T and Hong SY and Kim SB and Kim HG and Kim MJ. },
  title = {Effect of 835 MHz radiofrequency radiation exposure on calcium binding proteins in the hippocampus of the mouse brain},
  year = {2010},
  
  url = {https://www.sciencedirect.com/science/article/abs/pii/S0006899309025980},
}

Quick Questions About This Study

Yes, research shows 835 MHz radiation can severely damage hippocampus cells. A 2010 study found one month of exposure caused almost complete loss of pyramidal cells in the CA1 area of mouse hippocampus, the brain region crucial for memory and learning.

Research demonstrates significant damage to memory centers after one month of 835 MHz exposure. The study found almost complete loss of pyramidal cells in the hippocampus CA1 area, which could impair normal brain functions related to memory formation and learning.

Cell phone radiation at 835 MHz disrupts calcium binding proteins in brain cells. The study showed changes in calcium binding protein levels, which can alter cellular calcium levels and potentially harm normal hippocampal functions involving neuronal connectivity and integration.

Research found 835 MHz radiation causes severe damage to pyramidal neurons. After one month of exposure, mice showed almost complete loss of pyramidal cells in the hippocampus CA1 area, suggesting this frequency can significantly harm these critical brain cells.

Yes, 835 MHz radiation alters brain cell staining patterns significantly. The study found changes in calcium binding protein immunoreactivity, with moderate staining in some areas and prominent staining in granule cells, indicating cellular changes from radiation exposure.