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Immune System

Hsp70 expression and free radical release after exposure to non-thermal radio-frequency electromagnetic fields and ultrafine particles in human Mono Mac 6 cells.

No Effects Found

Simko M, Hartwig C, Lantow M, Lupke M, Mattsson MO, Rahman Q, Rollwitz J · 2006

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RF radiation at cell phone levels failed to trigger stress responses in immune cells, unlike air pollution particles which caused significant effects.

Plain English Summary

Summary written for general audiences

German researchers exposed human immune cells (monocytes) to radiofrequency radiation at 2 W/kg SAR - similar to cell phone levels - while also testing exposure to ultrafine air pollution particles. They measured two key stress indicators: free radical production and heat shock proteins. While the air pollution particles triggered significant stress responses, the RF radiation produced no measurable effects on either stress marker, even when combined with the particles.

Study Details

The contemporary urban environment has become increasingly complex in its composition, leading to discussions regarding possible novel health effects. Two factors that recently have received considerable attention are ultrafine particles (UFP; <0.1 microm) produced by combustion processes and emissions from wireless communication devices like mobile phones that emit in the radio-frequency (RF) part of the spectrum. Several studies have shown biological effects of both these exposures in various cell systems. Here we investigate if exposure to UFP (12-14 nm, 100 microg/ml) and RF-electromagnetic fields (EMF; 2 W/kg specific absorption rate (SAR); continuous wave (CW) or modulated (217Hz or GSM-nonDTX)), alone or in combination influences levels of the superoxide radical anion or the stress protein heat-shock protein (Hsp70) in the human monocyte cell line Mono Mac 6. Heat treatment (42-43 degrees C, 1h) was used as positive control for both stress reaction and for heat development in the RF exposure setup.

Our results clearly show that Mono Mac 6 cells are capable to internalise UFP, and that this phagocy...

Therefore, we conclude that in the investigated Mono Mac 6 cells, RF exposure alone or in combination with UFP cannot influence stress-related responses.

Cite This Study
Simko M, Hartwig C, Lantow M, Lupke M, Mattsson MO, Rahman Q, Rollwitz J (2006). Hsp70 expression and free radical release after exposure to non-thermal radio-frequency electromagnetic fields and ultrafine particles in human Mono Mac 6 cells. Toxicol Lett. 161(1):73-82, 2006.
Show BibTeX
@article{m_2006_hsp70_expression_and_free_3402,
  author = {Simko M and Hartwig C and Lantow M and Lupke M and Mattsson MO and Rahman Q and Rollwitz J},
  title = {Hsp70 expression and free radical release after exposure to non-thermal radio-frequency electromagnetic fields and ultrafine particles in human Mono Mac 6 cells.},
  year = {2006},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/16153791/},
}
PubMed: 16153791

Cited By (98 papers)

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Quick Questions About This Study

No, cell phone radiation at 2 W/kg SAR does not cause stress in immune cells. German researchers found that radiofrequency radiation produced no measurable effects on free radical production or heat shock proteins in human monocytes, unlike air pollution particles which caused significant stress responses.
No, radiofrequency radiation does not increase the toxicity of ultrafine air pollution particles. Research on human Mono Mac 6 cells showed that RF exposure combined with particles produced no additional stress effects compared to particle exposure alone.
No, human monocytes do not produce additional free radicals when exposed to RF radiation. A 2006 study found that radiofrequency exposure at cell phone levels caused no increase in free radical release, unlike ultrafine particles which increased levels by 40-45%.
No, cell phone level radiation does not trigger heat shock proteins in immune cells. German researchers found that RF exposure at 2 W/kg SAR produced no increase in Hsp70 expression in human monocytes, while heat treatment significantly increased these stress proteins.
Yes, Mono Mac 6 cells effectively detect biological stress responses and are suitable for EMF testing. These human monocytes showed clear responses to ultrafine particles and heat treatment but no effects from radiofrequency radiation, demonstrating their sensitivity to genuine stressors.