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Effects of 900-MHz Radio Frequencies on the Chemotaxis of Human Neutrophils in Vitro.

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Aly AA, Cheema MI, Tambawala M, Laterza R, Zhou E, Rathnabharathi K, Barnes FS. · 2008

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Exposing human neutrophils to a 900-MHz RF field increased their movement speed by approximately 50% above any temperature-only value and changed their direction of motion.

Plain English Summary

Summary written for general audiences

Researchers studied how 900-MHz radio-frequency fields affect the ability of human neutrophils to follow concentration gradients of Cyclic Adenosine 3', 5'-Monophosphate (C-AMP). Blood from healthy adult donors was exposed in vitro to different temperatures and a 900-MHz RF field at approximately 0.4 V/m. When the 900-MHz RF field was applied, neutrophil speed increased above the value observed at the same temperature, and the maximum speed exceeded that measured at any temperature by approximately 50%. The direction of motion changed from along the concentration gradient and the electrical field lines to motion at right angles to the concentration gradient and the electric field.

Why This Matters

Without RF exposure, neutrophil speed increased with rising temperatures from 35 to 40 degrees, peaked at 40 degrees, and then decreased above that point. The calculated temperature change caused by the RF exposure itself was less than one microdegree. The average time for neutrophils to respond to the RF radiation was about 2.5 minutes.

Exposure Details

Electric Field
0.4 V/m
Source/Device
900-MHz

Exposure Context

This study used 0.4 V/m for electric fields:

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.

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

The effects of radio frequency (RF) fields on the ability of human neutrophils to follow concentration gradients of Cyclic Adenosine 3', 5'-Monophosphate (C-AMP) are reported.

Blood from healthy adult donors was exposed in vitro to different temperatures and 900-MHz RF field ...

It was observed that the neutrophils' speed increased with increasing temperatures from 35 degrees t...

The average time for the neutrophils to respond to the effect of RF radiation was about 2.5 min.

Cite This Study
Aly AA, Cheema MI, Tambawala M, Laterza R, Zhou E, Rathnabharathi K, Barnes FS. (2008). Effects of 900-MHz Radio Frequencies on the Chemotaxis of Human Neutrophils in Vitro. IEEE Transactions on Biomedical Engineering, 55(2): 795-797, 2008.
Show BibTeX
@article{aa_2008_effects_of_900mhz_radio_809,
  author = {Aly AA and Cheema MI and Tambawala M and Laterza R and Zhou E and Rathnabharathi K and Barnes FS.},
  title = {Effects of 900-MHz Radio Frequencies on the Chemotaxis of Human Neutrophils in Vitro.},
  year = {2008},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/18270019/},
}
PubMed: 18270019

Cited By (30 papers)

Quick Questions About This Study

Human neutrophils from blood of healthy adult donors were exposed in vitro to a 900-MHz RF field at approximately 0.4 V/m.
When the 900-MHz RF field was applied, neutrophil speed increased above the value observed at the same temperature, and the maximum speed exceeded any temperature-only value by approximately 50%.
The direction of motion changed from along the concentration gradient and the electrical field lines to motion at right angles to the concentration gradient and the electric field.
The calculated temperature change resulting from the RF exposure was less than one microdegree.
The average time for the neutrophils to respond to the effect of RF radiation was about 2.5 minutes.