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Grouping of Experimental Conditions as an Approach to Evaluate Effects of Extremely Low-Frequency Magnetic Fields on Oxidative Response in in vitro Studies.

Mattsson MO, Simkó M - Front Public Health (2014)

Bottom Line: A large body of literature deals with biological effects of extremely low-frequency magnetic fields (ELF MFs) studied in vitro.Despite the multitude of studies, no coherent picture has evolved regarding the plausibility of effects at low-flux densities or regarding the interaction mechanisms.A response at lower flux densities is seen in certain studies, although not consistently.

View Article: PubMed Central - PubMed

Affiliation: Environmental Resources and Technologies, Department Health and Environment, AIT Austrian Institute of Technology , Tulln , Austria.

ABSTRACT
A large body of literature deals with biological effects of extremely low-frequency magnetic fields (ELF MFs) studied in vitro. Despite the multitude of studies, no coherent picture has evolved regarding the plausibility of effects at low-flux densities or regarding the interaction mechanisms. Here, we propose that ELF MF exposure in vitro causes changes in oxidative status as an early response. We tested this hypothesis by scrutinizing the literature and applying a grouping approach for analyzing relevant biological properties and exposure conditions. A total of 41 scientific original publications were analyzed for this purpose. The conclusion from the work is that ELF MF (modulated or unmodulated) consistently can influence the oxidative status, at or above 1 mT, in a broad range of cell types and independent of exposure duration. A response at lower flux densities is seen in certain studies, although not consistently. Further studies with stringent protocols for sham exposure, blinding, and statistical analysis as well as appropriate positive controls are needed to establish if true dose-relationships for effects on oxidative status exist.

No MeSH data available.


Related in: MedlinePlus

Oxidative response as a positive or negative finding after different exposure durations to ELF MF in different cell types.
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Figure 4: Oxidative response as a positive or negative finding after different exposure durations to ELF MF in different cell types.

Mentions: It has been discussed that the exposure duration is another important condition for bioeffects. To identify if this is the case, we introduced three groups of exposure durations: ≤60 min, >1 h up to 24 h, and more than 1 day. Out of 69 investigations, oxidative response was shown in 49 studies. It seems that the exposure duration is not relevant for the biological response (Figure 4). Short exposure (up to 60 min) resulted in 23 papers in an effect, whereas no effects were reported in 7 papers (a ratio of 0.77). MF exposure up to 24 h resulted in 18 positive cases and in 9 negative cases (ratio 0.67), whereas after exposure up to day/s, in 8 positive papers and in 4 negative results were reported (ratio 0.67).


Grouping of Experimental Conditions as an Approach to Evaluate Effects of Extremely Low-Frequency Magnetic Fields on Oxidative Response in in vitro Studies.

Mattsson MO, Simkó M - Front Public Health (2014)

Oxidative response as a positive or negative finding after different exposure durations to ELF MF in different cell types.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4151017&req=5

Figure 4: Oxidative response as a positive or negative finding after different exposure durations to ELF MF in different cell types.
Mentions: It has been discussed that the exposure duration is another important condition for bioeffects. To identify if this is the case, we introduced three groups of exposure durations: ≤60 min, >1 h up to 24 h, and more than 1 day. Out of 69 investigations, oxidative response was shown in 49 studies. It seems that the exposure duration is not relevant for the biological response (Figure 4). Short exposure (up to 60 min) resulted in 23 papers in an effect, whereas no effects were reported in 7 papers (a ratio of 0.77). MF exposure up to 24 h resulted in 18 positive cases and in 9 negative cases (ratio 0.67), whereas after exposure up to day/s, in 8 positive papers and in 4 negative results were reported (ratio 0.67).

Bottom Line: A large body of literature deals with biological effects of extremely low-frequency magnetic fields (ELF MFs) studied in vitro.Despite the multitude of studies, no coherent picture has evolved regarding the plausibility of effects at low-flux densities or regarding the interaction mechanisms.A response at lower flux densities is seen in certain studies, although not consistently.

View Article: PubMed Central - PubMed

Affiliation: Environmental Resources and Technologies, Department Health and Environment, AIT Austrian Institute of Technology , Tulln , Austria.

ABSTRACT
A large body of literature deals with biological effects of extremely low-frequency magnetic fields (ELF MFs) studied in vitro. Despite the multitude of studies, no coherent picture has evolved regarding the plausibility of effects at low-flux densities or regarding the interaction mechanisms. Here, we propose that ELF MF exposure in vitro causes changes in oxidative status as an early response. We tested this hypothesis by scrutinizing the literature and applying a grouping approach for analyzing relevant biological properties and exposure conditions. A total of 41 scientific original publications were analyzed for this purpose. The conclusion from the work is that ELF MF (modulated or unmodulated) consistently can influence the oxidative status, at or above 1 mT, in a broad range of cell types and independent of exposure duration. A response at lower flux densities is seen in certain studies, although not consistently. Further studies with stringent protocols for sham exposure, blinding, and statistical analysis as well as appropriate positive controls are needed to establish if true dose-relationships for effects on oxidative status exist.

No MeSH data available.


Related in: MedlinePlus