8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body

Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Oxidative Stress

Effects of 1800 MHz radiofrequency fields on signal transduction and antioxidant proteins in human A172 glioblastoma cells

No Effects Found

Authors not listed · 2021

Share:

Human brain cancer cells showed no consistent biological changes when exposed to cell phone radiation at twice the legal safety limit.

Plain English Summary

Summary written for general audiences

Researchers exposed human brain cancer cells to 1800 MHz radiofrequency radiation (the frequency used by GSM cell phones) for up to 4 hours at levels twice the legal limit. They found no consistent changes in cellular stress proteins or signaling pathways, with only sporadic effects that appeared to be statistical noise rather than real biological responses.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1800 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1800 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale
Cite This Study
Unknown (2021). Effects of 1800 MHz radiofrequency fields on signal transduction and antioxidant proteins in human A172 glioblastoma cells.
Show BibTeX
@article{effects_of_1800_mhz_radiofrequency_fields_on_signal_transduction_and_antioxidant_proteins_in_human_a172_glioblastoma_cells_ce2507,
  author = {Unknown},
  title = {Effects of 1800 MHz radiofrequency fields on signal transduction and antioxidant proteins in human A172 glioblastoma cells},
  year = {2021},
  doi = {10.1080/09553002.2021.1934751},
  
}
DOI: 10.1080/09553002.2021.1934751PubMed: 34047676

Quick Questions About This Study

This study found no consistent effects on human brain cancer cells exposed to 1800 MHz GSM radiation for up to 4 hours. A few sporadic changes were detected, but researchers concluded these were likely statistical false positives rather than real biological responses.
Researchers measured key antioxidant proteins (SOD1, SOD2, catalase, thioredoxin, peroxiredoxin) in brain cells after radiation exposure. No statistically significant changes were found in these cellular defense systems, suggesting no immediate oxidative stress response.
At 2.0 W/kg (double the current safety limit), human glioblastoma cells showed no consistent damage to signal transduction pathways or antioxidant systems. This suggests current safety limits may provide adequate protection for these cellular functions.
The study compared both continuous 1800 MHz waves and GSM-modulated signals. Neither type produced consistent biological effects in brain cells, with only occasional sporadic changes that researchers attributed to statistical variation rather than real differences.
Researchers tested exposure times of 5 minutes, 30 minutes, and 4 hours. No consistent time-dependent effects were observed across any duration, suggesting these cellular pathways don't show cumulative damage over these timeframes.