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Effect of a 2.45-GHz radiofrequency electromagnetic field on neutrophil chemotaxis and phagocytosis in differentiated human HL-60 cells.

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Koyama S, Narita E, Suzuki Y, Taki M, Shinohara N, Miyakoshi J. · 2014

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WiFi-frequency radiation at safety limit levels showed no effect on key immune cell functions in this controlled study.

Plain English Summary

Summary written for general audiences

Japanese researchers exposed immune cells called neutrophils to 2.45-GHz radiofrequency radiation (the same frequency used in WiFi and microwave ovens) at levels up to 10 W/kg for up to 24 hours. They found no significant effects on the cells' ability to migrate toward threats or engulf harmful particles - two critical immune functions. This suggests that RF exposure at current safety limits may not impair these specific immune responses.

Why This Matters

This study provides reassuring evidence about RF radiation's effects on neutrophil function, which is significant because neutrophils are your immune system's first responders to infection and injury. The researchers tested exposure levels both at and above current safety guidelines (2 W/kg is the ICNIRP limit, while 10 W/kg exceeds typical device exposures). What makes this research particularly relevant is that it examined 2.45-GHz radiation - the exact frequency used by WiFi routers, Bluetooth devices, and microwave ovens that surround us daily. While this single study doesn't settle all questions about RF radiation and immune function, it adds to a growing body of research examining how wireless technology affects our biological systems. The reality is that we need more studies like this one - well-controlled laboratory research that examines specific biological functions at realistic exposure levels.

Exposure Details

SAR
2, 10 W/kg
Source/Device
2.45-GHz
Exposure Duration
4 and 24 hours

Exposure Context

This study used 2, 10 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: 2, 10 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 1x higher than this level
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

Study Details

The aim of this study is to invesitgate Effect of a 2.45-GHz radiofrequency electromagnetic field on neutrophil chemotaxis and phagocytosis in differentiated human HL-60 cells.

In order to investigate the properties of RF fields, we examined the effect of 2.45-GHz RF fields at...

Neutrophil chemotaxis was not affected by RF-field exposure, and subsequent phagocytosis was not aff...

The results of our experiments for RF-field exposure at an SAR under 10 W/kg showed very little or no effects on either chemotaxis or phagocytosis in neutrophil-like human HL-60 cells.

Cite This Study
Koyama S, Narita E, Suzuki Y, Taki M, Shinohara N, Miyakoshi J. (2014). Effect of a 2.45-GHz radiofrequency electromagnetic field on neutrophil chemotaxis and phagocytosis in differentiated human HL-60 cells. J Radiat Res. 2014 Sep 5. pii: rru075.
Show BibTeX
@article{s_2014_effect_of_a_245ghz_1111,
  author = {Koyama S and Narita E and Suzuki Y and Taki M and Shinohara N and Miyakoshi J.},
  title = {Effect of a 2.45-GHz radiofrequency electromagnetic field on neutrophil chemotaxis and phagocytosis in differentiated human HL-60 cells.},
  year = {2014},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/25194051/},
}
PubMed: 25194051

Cited By (20 papers)

Quick Questions About This Study

A 2014 Japanese study found that 2.45-GHz radiation (the same frequency as WiFi) did not significantly impair key immune cell functions. Researchers exposed neutrophils to RF radiation for up to 24 hours at safety limit levels without affecting their ability to fight infections or migrate toward threats.
Research on neutrophils (a type of white blood cell) exposed to 2.45-GHz radiation showed no significant damage to critical immune functions. The study tested exposure levels up to 10 W/kg for 24 hours and found these immune cells maintained their normal ability to respond to threats.
A controlled study using the same 2.45-GHz frequency found in microwave ovens showed minimal effects on immune cell function. Neutrophils exposed to this radiation at current safety guidelines maintained their normal chemotaxis and phagocytosis abilities, suggesting limited impact on immune responses.
One study examining 2.45-GHz radiofrequency exposure found no weakening of specific immune functions in neutrophils. These critical immune cells retained their ability to migrate toward infections and engulf harmful particles even after 24 hours of exposure at recommended safety levels.
Research shows 2.45-GHz radiation (WiFi frequency) has minimal impact on neutrophil function. Japanese scientists found that these immune cells maintained normal chemotaxis and phagocytosis abilities when exposed to RF fields at current safety guidelines, suggesting preserved immune response capabilities.