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

Activity of matrix metallo proteinases (MMPs) and the tissue inhibitor of MMP (TIMP)-1 in electromagnetic field-exposed THP-1 cells

Bioeffects Seen

Patruno A, Pesce M, Marrone A, Speranza L, Grilli A, De Lutiis MA, Felaco M, Reale M · 2012

View Original Abstract
Share:

Power frequency magnetic fields disrupt immune cell repair mechanisms through oxidative stress pathways at exposure levels found near electrical equipment.

Plain English Summary

Summary written for general audiences

Researchers exposed immune cells to 50 Hz magnetic fields (the same frequency as power lines) for 24 hours and found significant disruption of cellular repair mechanisms. The EMF exposure caused oxidative stress and altered the activity of enzymes called matrix metalloproteinases (MMPs), which help regulate tissue repair and inflammation. These changes could potentially affect how the immune system responds to threats and repairs tissue damage.

Why This Matters

This study reveals a concerning mechanism by which power frequency magnetic fields can disrupt fundamental cellular processes. The 1 milliTesla exposure level used here is relatively high compared to typical household exposures (which range from 0.01 to 0.2 mT), but it's within the range you might encounter very close to electrical appliances or power lines. What makes this research particularly significant is that it identifies a specific biological pathway through which EMF exposure affects immune cell function. The disruption of MMP regulation could have far-reaching implications for wound healing, inflammation control, and tissue maintenance. The science demonstrates that even non-thermal EMF exposures can trigger cascading biochemical changes that affect cellular health and immune function.

Exposure Details

Magnetic Field
1 mG
Source/Device
50 Hz
Exposure Duration
24 h

Exposure Context

This study used 1 mG for magnetic 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.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 1 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Severe Concern rangeFCC limit is 2,000x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

We analyzed the effects of EMF on the activity and expression of MMPs in THP-1 cells.

Cells were exposed to a 50 Hz, 1 mT EMF for 24 h and incubated with or without LPS.

Our data indicate that THP-1 cells exposed to EMF causes a reduction of anti-oxidant enzyme activity...

These results may suggest a pathway connecting an imbalance of MMPs and their cognate inhibitor TIMP-1.

Cite This Study
Patruno A, Pesce M, Marrone A, Speranza L, Grilli A, De Lutiis MA, Felaco M, Reale M (2012). Activity of matrix metallo proteinases (MMPs) and the tissue inhibitor of MMP (TIMP)-1 in electromagnetic field-exposed THP-1 cells J Cell Physiol. 227(6):2767-2774, 2012.
Show BibTeX
@article{a_2012_activity_of_matrix_metallo_440,
  author = {Patruno A and Pesce M and Marrone A and Speranza L and Grilli A and De Lutiis MA and Felaco M and Reale M},
  title = {Activity of matrix metallo proteinases (MMPs) and the tissue inhibitor of MMP (TIMP)-1 in electromagnetic field-exposed THP-1 cells},
  year = {2012},
  doi = {10.1002/jcp.23024},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/jcp.23024},
}
DOI: 10.1002/jcp.23024

Cited By (42 papers)

Quick Questions About This Study

Research shows power line frequencies (50 Hz) can disrupt immune cell function. A 2012 study found that 24-hour exposure caused oxidative stress and altered cellular repair mechanisms in immune cells, potentially affecting how your body fights infections and heals tissue damage.
Yes, 50 Hz EMF exposure significantly disrupts cellular repair processes. Laboratory research demonstrated that this frequency reduces antioxidant enzyme activity and alters proteins that regulate tissue repair, creating an imbalance that could impair your body's natural healing mechanisms.
Power line frequency (50 Hz) reduces your cells' antioxidant defenses. Studies show 24-hour exposure decreases protective enzyme activity while increasing harmful nitrogen compounds, creating oxidative stress that can damage cellular components and compromise immune function.
Power line EMF may compromise immune system function by disrupting cellular repair mechanisms and reducing antioxidant defenses. Research indicates 50 Hz exposure creates oxidative stress and alters enzyme activity, potentially affecting your body's ability to respond to threats and repair damage.
EMF exposure disrupts tissue repair by altering key regulatory proteins called matrix metalloproteinases (MMPs). Research shows 50 Hz fields cause oxidative damage to repair-controlling enzymes, creating an imbalance that could interfere with normal wound healing and tissue maintenance processes.