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

Exposure to 900 MHz radiofrequency radiation induces caspase 3 activation in proliferating human lymphocytes

Bioeffects Seen

Palumbo R, Brescia F, Capasso D, Sannino A, Sarti M, Capri M, Grassilli E, Scarfì MR · 2008

View Original Abstract
Share:

Cell phone radiation activated cell death pathways in dividing immune cells by 22-32% at typical phone exposure levels.

Plain English Summary

Summary written for general audiences

Italian researchers exposed human immune cells to cell phone radiation for one hour and found a 22-32% increase in caspase 3, an enzyme linked to cellular stress. The effect only occurred in actively dividing cells, suggesting mobile phone radiation may impact growing immune cells.

Why This Matters

This study adds to mounting evidence that radiofrequency radiation affects cellular processes at exposure levels similar to those from everyday devices. The 1.35 W/kg SAR used here falls within the range of typical cell phone emissions during calls. What makes this research particularly significant is that it shows RF radiation specifically affects proliferating immune cells - the very cells your body relies on to fight infections and maintain health. The fact that resting cells showed no effect suggests the radiation interferes with cellular division processes. While the researchers didn't observe immediate cell death, the activation of caspase 3 indicates cellular stress that could have longer-term consequences. The reality is that your immune system is constantly producing new cells, making this finding relevant to daily EMF exposure from phones and wireless devices.

Exposure Details

SAR
1.35 W/kg
Source/Device
900 MHz
Exposure Duration
1h

Exposure Context

This study used 1.35 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: 1.35 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 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

In this study, the induction of apoptosis after exposure to 900 MHz radiofrequency radiation (GSM signal) was investigated by assessing caspase 3 activation in exponentially growing Jurkat cells and in quiescent and proliferating human peripheral blood lymphocytes (PBLs).

The exposure was carried out at an average specific absorption rate of 1.35 W/kg in a dual wire patc...

After 1 h exposure to the radiofrequency field, a slight but statistically significant increase in c...

Further studies are warranted to investigate the biological significance of our findings of a dose-response increase in caspase 3 activity after exposure to radiofrequency radiation.

Cite This Study
Palumbo R, Brescia F, Capasso D, Sannino A, Sarti M, Capri M, Grassilli E, Scarfì MR (2008). Exposure to 900 MHz radiofrequency radiation induces caspase 3 activation in proliferating human lymphocytes Radiat Res. 170(3):327-334, 2008.
Show BibTeX
@article{r_2008_exposure_to_900_mhz_1247,
  author = {Palumbo R and Brescia F and Capasso D and Sannino A and Sarti M and Capri M and Grassilli E and Scarfì MR},
  title = {Exposure to 900 MHz radiofrequency radiation induces caspase 3 activation in proliferating human lymphocytes},
  year = {2008},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/18763855/},
}
PubMed: 18763855

Cited By (32 papers)

Quick Questions About This Study

Yes, Italian researchers found that one hour of 900 MHz radiation exposure increased caspase 3 activity by 22-32% in actively dividing human immune cells. This cellular stress enzyme only increased in growing cells, not resting ones, suggesting mobile phone radiation specifically impacts proliferating immune tissue.
Caspase 3 activity increased significantly 6 hours after one hour of 900 MHz radiation exposure in human lymphocytes. The 2008 Italian study measured this cellular stress enzyme at the 6-hour mark and found 22-32% increases in actively dividing immune cells compared to unexposed controls.
The 2008 study found 900 MHz radiation triggered caspase 3 increases only in proliferating human lymphocytes, not quiescent (resting) cells. This suggests cell phone frequency radiation specifically impacts actively growing immune cells during their vulnerable division phase, while dormant immune cells remain unaffected.
No, the Italian researchers found no evidence of increased cell death 24 hours after one-hour 900 MHz exposure, despite elevated caspase 3 at 6 hours. While the cellular stress enzyme increased initially, this didn't translate to actual immune cell death or reduced viability at the 24-hour measurement.
The 2008 study found 900 MHz radiation increased caspase 3 activity in dividing immune cells without triggering cell death or affecting cell cycle progression. This suggests cell phone radiation may activate cellular stress pathways in proliferating lymphocytes through non-apoptotic mechanisms that researchers don't fully understand yet.