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Oxidative Stress

Effect of millimeter wave radiation on catalase activity.

No Effects Found

Logani MK, Agelan A, Ziskin MC. · 2002

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Millimeter wave radiation at 42.2 GHz showed no effect on protective enzymes, even at power levels 300 times higher than cell phone limits.

Plain English Summary

Summary written for general audiences

Researchers exposed mice to high-intensity millimeter wave radiation at 42.2 GHz to test whether it could protect an enzyme called catalase from damage caused by chemotherapy drugs. The radiation, delivered at power levels about 1,000 times higher than typical cell phone exposure, showed no protective effect on the enzyme. This suggests that millimeter waves at these frequencies don't provide the cellular protection some researchers had hoped to find.

Why This Matters

This study is significant because it tested millimeter wave radiation at the same frequency range being deployed in 5G networks, though at much higher power levels than consumer exposure. The researchers used a specific absorption rate of 622 W/kg - that's roughly 300 times higher than the SAR limit for cell phones (2 W/kg in the US). What makes this research particularly relevant is that it examined catalase, an enzyme crucial for protecting cells from oxidative damage. The fact that even these extreme exposure levels showed no biological effect on this protective enzyme provides important data for understanding how millimeter waves interact with biological systems. While the study found no effects, the reality is that we're still building our understanding of how these frequencies affect living tissue, especially at the lower power levels we encounter in daily life from 5G devices.

Exposure Details

SAR
622 ± 100 W/kg
Power Density
31 ± 5 mW/cm²
Source/Device
42.2±0.2 GHz

Exposure Context

This study used 31 ± 5 mW/cm² for radio frequency:

This study used 622 ± 100 W/kg for SAR (device absorption):

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 Exposure Level in ContextStudy Exposure Level in ContextThis study: 31 ± 5 mW/cm²Extreme Concern - 1,000 µW/m²FCC Limit - 10M µW/m²Effects observed in the Extreme Concern range (Building Biology)This level is 5 times the FCC limit
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 200 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 200 MHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

In order to understand the mechanisms involved in this reduction, the effect of millimeter electromagnetic waves (MWs) on catalase activity was examined in mouse blood

SKH-1 hairless mice were irradiated on their midbacks with 42.2±0.2 GHz millimeter waves. The incide...

The sham control groups were treated in a similar manner, but not irradiated. MW irradiation, before...

Cite This Study
Logani MK, Agelan A, Ziskin MC. (2002). Effect of millimeter wave radiation on catalase activity. Electromag Biol Med 21:303-308, 2002.
Show BibTeX
@article{mk_2002_effect_of_millimeter_wave_3206,
  author = {Logani MK and Agelan A and Ziskin MC.},
  title = {Effect of millimeter wave radiation on catalase activity.},
  year = {2002},
  doi = {10.1081/JBC-120016009},
  url = {https://www.tandfonline.com/doi/abs/10.1081/JBC-120016009},
}
DOI: 10.1081/JBC-120016009

Cited By (4 papers)

Quick Questions About This Study

A 2002 study found that millimeter wave radiation at 42.2 GHz provided no protective effect against chemotherapy-induced cellular damage in mice. The high-intensity radiation failed to preserve catalase enzyme activity, suggesting millimeter waves don't offer the cellular protection some researchers hoped to find.
Research on 42.2 GHz millimeter waves showed no significant effects on catalase activity, an important antioxidant enzyme. While this specific study used much higher power levels than typical 5G exposure, it suggests millimeter waves may not directly impact this particular oxidative stress marker.
A controlled study exposing mice to 42.2 GHz millimeter waves found no significant impact on catalase enzyme activity in blood. The radiation, delivered at very high intensities, neither helped nor harmed this important antioxidant enzyme that protects cells from damage.
Research on 42.2 GHz millimeter wave exposure showed no effect on catalase, a key cellular protection enzyme. Despite using radiation intensities about 1,000 times higher than typical wireless device exposure, the study found no enhancement or reduction in the enzyme's protective activity.
One 2002 study found no significant biological effects from 42.2 GHz millimeter wave radiation on catalase enzyme activity in mice. However, this represents limited research on a single biological marker, and more comprehensive studies are needed to fully assess potential health impacts.