The effects of a chronic exposure of healthy and diabetic rats to 50 Hz magnetic fields on metabolic and hematologic parameters should be investigated.
Diabetes in diabetic rats was generated by an injection of streptozotocin. 80 rats were divided into the following groups (sizes of groups not stated): 1) healthy rats, sham exposure for group 2, 2) healthy rats, exposure to 5 mT magnetic field, 3) healthy rats, sham exposure for group 4, 4) healthy rats, exposure to 8 mT magnetic field, 5) diabetic rats, sham exposure for group 6, 6) diabetic rats, exposure to 5 mT magnetic field.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
50 Hz
Exposure duration:
continuous for 165 min/day for 3 weeks
|
|
|
Exposure 2:
50 Hz
Exposure duration:
continuous for 165 min/day for 3 weeks
|
|
| Frequency | 50 Hz |
|---|---|
| Type | |
| Exposure duration | continuous for 165 min/day for 3 weeks |
| Exposure source | |
|---|---|
| Chamber | 8 animals were kept in a plexiglas cage during exposure; rats were kept in seven separate, stainless steel cages |
| Setup | plexiglas cage was placed in north-south oriented magnetic field, temperature of solenoid was always kept between 21-24°C |
| Sham exposure | A sham exposure was conducted. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 5 mT | - | - | - | groups 2 and 6 |
| Frequency | 50 Hz |
|---|---|
| Exposure duration | continuous for 165 min/day for 3 weeks |
| Exposure source |
|
|---|---|
| Sham exposure | A sham exposure was conducted. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 8 mT | - | - | - | group 4 |
An increase in body weight was found in all groups with healthy animals (1-4) whereas diabetic groups (5 and 6) showed a loss of weight. Total cholesterol was significantly decreased in group 6 (exposed) compared to group 5, the level of triglycerides as well as the level of glucose were significantly decreased in group 2 (exposed) compared to group 1 and in group 6 (exposed) compared to group 5. No results were displayed for groups 3 and 4 (note from the EMF-Portal editorial office).
The authors conclude, that a chronic exposure of healthy and diabetic rats to the tested 50 Hz magnetic fields has a depressing effect on their metabolism .
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