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EMF radiation at 2450MHz triggers changes in the morphology and expression of heat shock proteins and glucocorticoid receptors in rat thymus.

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Misa-Agustiño MJ, Leiro-Vidal JM, Gomez-Amoza JL, Jorge-Mora MT, Jorge-Barreiro FJ, Salas-Sánchez AA, Ares-Pena FJ, López-Martín E · 2015

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WiFi-frequency radiation damaged immune system organs in rats even at non-heating levels, challenging heating-only safety standards.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 2.45 GHz radiofrequency radiation (the same frequency used in microwave ovens and WiFi) and found it caused visible damage to the thymus, a key immune system organ. The radiation triggered cellular stress responses, increased blood vessel leakage, and altered stress proteins even at levels below those that cause heating. This suggests that EMF exposure can disrupt immune system function through non-thermal biological mechanisms.

Why This Matters

This study provides compelling evidence that radiofrequency radiation affects immune system organs through mechanisms that have nothing to do with heating. The 2.45 GHz frequency used here is identical to what your microwave oven uses and very close to WiFi frequencies. What makes this research particularly significant is that the researchers specifically ensured they were using 'sub-thermal' levels - meaning the radiation wasn't hot enough to cook tissue, yet it still caused measurable biological damage. The thymus is crucial for immune function, especially in developing immune responses, so any disruption here could have broader health implications. The reality is that this adds to a growing body of evidence showing that our current safety standards, which only consider heating effects, may be missing important biological impacts that occur at much lower exposure levels.

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

Specific exposure levels were not quantified in this study. The study examined exposure from: 2.45 GHz

Study Details

Electromagnetic fields (EMFs) can act as inducers or mediators of stress response through the production of heat shock proteins (HSPs) that modulate immune response and thymus functions. In this study, we analyzed cellular stress levels in rat thymus after exposure of the rats to a 2.45 GHz radio frequency (RF) using an experimental diathermic model in a Gigahertz Transverse Electromagnetic (GTEM) chamber.

In this experiment, we used H&E staining, the ELISA test and immunohistochemistry to examine Hsp70 ...

The thymus tissue presented several morphological changes, including increased distribution of blood...

Our results indicate that non-ionizing sub-thermal radiation causes changes in the endothelial permeability and vascularization of the thymus, and is a tissue-modulating agent for Hsp90 and GR.

Cite This Study
Misa-Agustiño MJ, Leiro-Vidal JM, Gomez-Amoza JL, Jorge-Mora MT, Jorge-Barreiro FJ, Salas-Sánchez AA, Ares-Pena FJ, López-Martín E (2015). EMF radiation at 2450MHz triggers changes in the morphology and expression of heat shock proteins and glucocorticoid receptors in rat thymus. Life Sci. 127:1-11, 2015.
Show BibTeX
@article{mj_2015_emf_radiation_at_2450mhz_2426,
  author = {Misa-Agustiño MJ and Leiro-Vidal JM and Gomez-Amoza JL and Jorge-Mora MT and Jorge-Barreiro FJ and Salas-Sánchez AA and Ares-Pena FJ and López-Martín E},
  title = {EMF radiation at 2450MHz triggers changes in the morphology and expression of heat shock proteins and glucocorticoid receptors in rat thymus.},
  year = {2015},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/25731700/},
}
PubMed: 25731700

Cited By (24 papers)

Quick Questions About This Study

Research shows that 2.45 GHz radiation (the same frequency as WiFi) caused visible damage to rat thymus tissue, including increased blood vessel leakage and cellular stress responses. The study found these effects occurred even at power levels below those that cause heating.
Yes, a 2015 study found that 2.45 GHz radiation (microwave oven frequency) altered thymus morphology in rats, causing hemorrhaging and changes to stress proteins. The thymus is a critical immune system organ responsible for T-cell development and immune function.
Exposure to 2.45 GHz radiation decreased Hsp90 levels in thymus tissue, particularly at higher power levels (12 watts). Most groups recovered after 24 hours, but one group showed persistent changes, indicating potential cellular stress responses to EMF exposure.
Research demonstrates that 2450 MHz radiation increased blood vessel permeability in thymus tissue, causing red blood cells to leak into surrounding tissue. This vascular damage occurred through non-thermal mechanisms, suggesting EMF affects tissue structure beyond simple heating effects.
Studies show that 2.45 GHz EMF exposure increased glucocorticoid receptor activity in thymus cortex tissue. These receptors respond to stress hormones, suggesting that EMF exposure may trigger stress responses in immune organs even without thermal heating effects.