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Oxidative Stress

Effects of extremely low frequency magnetic field on the parameters of oxidative stress in heart

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Goraca A, Ciejka E, Piechota A. · 2010

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In rats, a 40 Hz, 7 mT magnetic field caused oxidative stress markers in heart tissue only when exposure lasted 60 minutes per day, not 30 minutes per day.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to an extremely low frequency magnetic field (ELF-MF) at 40 Hz and 7 mT for either 30 or 60 minutes per day for 14 days, then measured oxidative stress markers in heart tissue and plasma. Exposure at 30 minutes per day did not significantly alter any of the measured oxidative stress markers.

Why This Matters

The study used three groups of rats: a control group with no exposure, a group exposed for 30 minutes per day, and a group exposed for 60 minutes per day, with frequency and intensity kept the same across both exposed groups. Oxidative stress was assessed by measuring TBARS, hydrogen peroxide, free sulphydryl groups, and reduced glutathione in heart tissue, and plasma antioxidant capacity was measured using the ferric reducing ability method. The researchers noted that increasing production of free radicals is one proposed mechanism by which ELF-MF may affect biological systems. The researchers concluded that the effects of ELF-MF on reactive oxygen species generation and plasma antioxidant capacity depend on the duration of exposure.

Exposure Details

Magnetic Field
7 mT
Source/Device
40 Hz
Exposure Duration
30 min/day for 14 days

Exposure Context

This study used 7 mT 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: 7 mTExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern range (Building Biology)This level is 35 times the FCC limit
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 40 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 40 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

The present study was designated to assess if ELF-MF applied in the magnetotherapy, affects generation of reactive oxygen species (ROS) in heart tissue and antioxidant capacity of plasma according to its working time.

The experiments were performed on 3 groups of animals: group I - control; group II - exposed to 40 H...

Exposure to ELF-MF (40 Hz, 7 mT, 30 min/day for 2 weeks) did not significantly alter tissue TBARS, H...

Our results indicate that effects of ELF-MF on ROS generation in the heart tissue and antioxidant capacity of plasma depend on its working time.

Cite This Study
Goraca A, Ciejka E, Piechota A. (2010). Effects of extremely low frequency magnetic field on the parameters of oxidative stress in heart J Physiol Pharmacol. 61(3):333-338, 2010.
Show BibTeX
@article{a_2010_effects_of_extremely_low_379,
  author = {Goraca A and Ciejka E and Piechota A.},
  title = {Effects of extremely low frequency magnetic field on the parameters of oxidative stress in heart},
  year = {2010},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/20610864/},
}
PubMed: 20610864

Cited By (78 papers)

View all 78 citing papers on Semantic Scholar

Quick Questions About This Study

Rats were exposed to a 40 Hz, 7 mT magnetic field for either 30 or 60 minutes per day for 14 days, while control rats were housed without any exposure.
Exposure at 30 minutes per day for two weeks did not significantly alter TBARS, hydrogen peroxide, free sulphydryl groups, glutathione, or plasma antioxidant capacity.
Exposure for 60 minutes per day caused a significant increase in TBARS and hydrogen peroxide (P<0.01) and a significant decrease in glutathione (P<0.05) and free sulphydryl groups in heart tissue. Plasma antioxidant capacity also decreased in the 60-minute exposure group.
The researchers concluded that the effects of ELF-MF on reactive oxygen species generation and plasma antioxidant capacity depend on its working time.
Oxidative stress was assessed by measuring TBARS, hydrogen peroxide, free sulphydryl groups, and glutathione in heart tissue, and plasma antioxidant capacity was measured using the ferric reducing ability method.