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Changes in cognitive function, synaptic structure and protein expression after long-term exposure to 2.856 and 9.375 GHz microwaves

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Wang H, Liu Y, Sun Y, Dong J, Xu X, Wang H, Zhao X, Zhang J, Yao B, Zhao L, Liu S, Peng R · 2023

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Long-term exposure to both 2.856 and 9.375 GHz microwaves impaired spatial memory and damaged hippocampal structures through disrupted synaptic function.

Plain English Summary

Summary written for general audiences

This study examined how long-term exposure to microwaves at 2.856 GHz and 9.375 GHz affected brain function in test subjects. Researchers found that both frequencies impaired spatial learning and memory, damaged brain structures in the hippocampus, and altered critical proteins involved in how brain cells communicate. The findings reveal that chronic microwave exposure can harm cognitive function through multiple biological mechanisms.

Why This Matters

This research matters because it demonstrates that chronic exposure to microwave radiation causes measurable damage to learning, memory, and brain structure at two distinct frequencies. The 2.856 GHz frequency falls within the range used by WiFi and Bluetooth (2.4 GHz band), while 9.375 GHz sits in the X-band range used by satellite communications and some 5G applications. The fact that both frequencies produced cognitive impairment and hippocampal damage suggests this is not an isolated phenomenon limited to specific wavelengths.

What makes these findings particularly concerning is the discovery of altered protein expression in both brain tissue and blood serum. The decrease in SNARE-associated protein Snapin indicates disrupted synaptic vesicle recycling, the fundamental process by which neurons communicate. This isn't subtle cellular stress. This is interference with the basic machinery of thought and memory. The identification of specific protein biomarkers in serum exosomes also opens the door to potentially detecting microwave-induced brain damage through blood tests, which could have significant implications for occupational health monitoring and public health surveillance.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Wang H, Liu Y, Sun Y, Dong J, Xu X, Wang H, Zhao X, Zhang J, Yao B, Zhao L, Liu S, Peng R (2023). Changes in cognitive function, synaptic structure and protein expression after long-term exposure to 2.856 and 9.375 GHz microwaves.
Show BibTeX
@article{wang_h_liu_y_sun_y_dong_j_xu_x_wang_h_zhao_x_zhang_j_yao_b_zhao_l_liu_s_peng_r_ce3551,
  author = {Wang H and Liu Y and Sun Y and Dong J and Xu X and Wang H and Zhao X and Zhang J and Yao B and Zhao L and Liu S and Peng R},
  title = {Changes in cognitive function, synaptic structure and protein expression after long-term exposure to 2.856 and 9.375 GHz microwaves},
  year = {2023},
  doi = {10.1186/s12964-022-01011-1},
  
}
DOI: 10.1186/s12964-022-01011-1

Quick Questions About This Study

Yes, this study found that long-term exposure to 2.856 GHz microwaves impaired spatial reference learning and memory abilities. The exposure also caused structural damage to the hippocampus, the brain region critical for memory formation, and disrupted proteins essential for neuron communication.
Long-term 9.375 GHz microwave exposure decreased several critical proteins in blood serum, including synaptophysin-like 1, ankyrin repeat and rabankyrin-5, protein phosphatase 3 catalytic subunit alpha, and sodium-dependent phosphate transporter 1. These proteins play roles in synaptic function and cellular signaling.
Yes, this research demonstrated that chronic exposure to both 2.856 and 9.375 GHz microwaves caused structural damage to the hippocampus, specifically in the dentate gyrus area. This damage was accompanied by impaired spatial learning and memory abilities, indicating functional consequences of the structural harm.
Snapin is a SNARE-associated protein that helps recycle synaptic vesicles, the tiny packages neurons use to communicate with each other. This study found decreased Snapin levels after microwave exposure, indicating that the recycling process was inhibited. This disruption interferes with how brain cells transmit information.
This study identified specific protein changes in serum exosomes (tiny particles released by cells into blood) after microwave exposure. These changes differed between 2.856 and 9.375 GHz exposure. While this is preliminary research, it suggests blood-based biomarkers might eventually help detect microwave-induced brain damage.