To confirm the results of two recent studies (see publication 9990 and publication 9089) on the induction of genotoxic effects in human fibroblasts exposed to 50 Hz intermittent (5 min field on/10 min field off) sinusoidal electromagnetic fields.
To extend the investigation and validate the data, in the same experimental conditions, the potential genotoxicity was also tested by exposing the cells to a 50 Hz powerline signal.
Positive controls were also provided by treating fibroblasts with hydrogen peroxide or mitomycin C for the comet assay or micronucleus assay, respectively.
Exposure | Parameters |
---|---|
Exposure 1:
50 Hz
Exposure duration:
intermittent, 5 min field on/10 min field off for 15 or 24 h
pure sinusoidal signal
|
|
Exposure 2:
50 Hz
Exposure duration:
intermittent, 5 min field on/10 min field off for 15, 18 or 24 h
|
Frequency | 50 Hz |
---|---|
Type | |
Waveform | |
Exposure duration | intermittent, 5 min field on/10 min field off for 15 or 24 h |
Additional info | pure sinusoidal signal |
Additional info | pure sinusoidal signal |
Exposure source |
|
---|---|
Setup | Exposure system consisted of two identical apparatuses made of four coaxial square coils (20 cm long) placed horizontally hence parallel to the surface of the culture plates, each of them housed in a µ-metal shielding box in the region of uniform MF (1% for 12 x 12 x 20 cm³ region and 5% within a region of 15 x 15 x 20 cm³). Coils were connected wound or counter wound configurations. The latter was used for sham exposure. |
Measurand | Value | Type | Method | Mass | Remarks |
---|---|---|---|---|---|
magnetic flux density | 1 mT | effective value | measured | - | - |
Frequency | 50 Hz |
---|---|
Type | |
Waveform | |
Exposure duration | intermittent, 5 min field on/10 min field off for 15, 18 or 24 h |
Additional info | power line signal consisting of 50 Hz fundamental frequency as well the harmonics. |
Additional info | Powerline signal consisting of 50 Hz fundamental frequency as well the harmonics. |
Exposure source |
|
---|
Measurand | Value | Type | Method | Mass | Remarks |
---|---|---|---|---|---|
magnetic flux density | 1 mT | effective value | measured | - | - |
No statistically significant difference was found in exposed compared to sham-exposed samples in any of the experimental conditions tested. In contrast, the positive controls showed a statistically significant increase in DNA damage in all cases, as expected.
Accordingly, the results do not confirm the findings reported previously for either comet induction or an increase in micronucleus frequency.
This website uses cookies to provide you the best browsing experience. By continuing to use this website you accept our use of cookies.