A Novel Method for Achieving Precision and Reproducibility in a 1.8 GHz Radiofrequency Exposure System That Modulates Intracellular ROS as a Function of Signal Amplitude in Human Cell Cultures

Authors: Dahon C, Aguida B, Lebon Y, Le Guen P, Dangremont A, Meyer O, Citerne J-M, Pooam M, Raad H, Thoradit T, et al.

Year: 2025

Category: Bioengineering

Journal: Bioengineering

DOI: 10.3390/bioengineering12030257

URL: https://www.mdpi.com/2306-5354/12/3/257

Abstract

Overview

Radiofrequency fields (RF) in the 1-28 GHz range are increasingly present in modern environments, prompting studies into their potential health impacts, including risks of cancer, neurological conditions, reproductive health, and electromagnetic hypersensitivity. Despite the mounting concern, inconsistencies in research findings persist, largely due to a lack of precision in exposure conditions and varied experimental methodologies. Notably, many observed RF effects on biological systems occur indirectly and take place over extended timeframes.

Findings

This study presents a streamlined RF exposure protocol targeting human HEK293 cell monolayer cultures with a single, well-defined 1.8 GHz carrier frequency. Utilizing a custom-built, shielded exposure system, the protocol delivers non-thermal RF signal amplitudes—mirroring those produced by everyday telecommunications devices. Critical to this approach is a brief, 15-minute exposure period, followed by immediate detection of changes in gene expression.

  • Rapid modulation of genes associated with oxidative stress and ROS signaling represents one of the earliest cellular responses to RF exposure.
  • Gene responses were complex and amplitude-dependent, consistent with a possible hormetic, receptor-driven mechanism.
  • Importantly, cellular responses occurred at RF amplitudes far below thermal thresholds, within the operational range of common personal electronic devices.

This approach highlights the importance of examining multiple amplitudes and employing direct, rapid readouts to accurately assess physiological outcomes from RF exposure.

Conclusion

The authors introduce a reproducible and precise RF exposure method for studying direct cellular responses in human cell cultures. Findings support a receptor-driven biological mechanism, where non-thermal RF exposure rapidly modulates intracellular ROS levels and related signaling pathways.

  • The gene expression response to RF is not simply dose-dependent; different amplitudes can produce opposite effects.
  • These findings suggest a possible biological basis for differing individual sensitivities to RF exposure.
  • Such mechanisms may underlie the syndromes like electromagnetic hypersensitivity (EHS), which have been previously linked to RF exposure.

While direct harm from RF exposure such as that from mobile phones has not been conclusively proven, these physiological responses indicate a tangible biological interaction and a possibility of heightened risk factors, especially in sensitive individuals or those under high oxidative stress.

This method provides a promising avenue for more consistent and comparable EMF research, and may help clarify controversies regarding health risks of RF exposure in human populations.

radiofrequency exposure ROS signaling human cell cultures electromagnetic fields oxidative stress gene expression EMF safety
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