Study type: Medical/biological study (experimental study)

The impact of chronic exposure to a magnetic field on energy metabolism and locomotion of Blaptica dubia med./bio.

By: Todorović D, Ilijin L, Mrdaković M, Vlahović M, Grčić A, Petković B, Perić-Mataruga V
Published in: Int J Radiat Biol 2020; 96 (8): 1076-1083
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Aim of study (acc. to author)

The effects of chronic exposure of Blaptica dubia nymphs to a static magnetic field or a 50 Hz magnetic field on the fat body and locomotor activity should be investigated. The cockroaches were used as a model organism to evaluate effects of chronic exposure to magnetic fields.

Background/further details

Blaptica dubia nymphs were divided into the following groups (n=10, respectively): 1) exposure to the 50 Hz magnetic field, 2) exposure to the static magnetic field, 3) control group.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: 5 months
Exposure 2:
Exposure duration: 5 months

Exposure 1

Main characteristics
Frequency 50 Hz
Type
Exposure duration 5 months
Exposure setup
Exposure source
Chamber Petri dish (5 nymphs per dish)
Setup temperature in electromagnet 26.3 ± 0.05 °C
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 10 mT - - - -
Additional parameter details

geomagnetic field in experimental room was approximately 47 µT

Exposure 2

Main characteristics
Frequency
Type
Exposure duration 5 months
Exposure setup
Exposure source
Chamber Petri dish (5 nymphs per dish)
Setup temperature in permanent magnet 26 ± 0.2 °C
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 110 mT - - - -

Reference articles

  • Todorović D et al. (2019): Long-term exposure of cockroach Blaptica dubia (Insecta: Blaberidae) nymphs to magnetic fields of different characteristics: effects on antioxidant biomarkers and nymphal gut mass

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

Exposure to the static magnetic field and 50 Hz magnetic field significantly decreased nymph body mass and glycogen content in the fat body but significantly increased all examined parameters of locomotor activity compared to the control group. Moreover, exposure to the static magnetic field significantly elevated total lipid content in the fat body, while exposure to the 50 Hz magnetic field significantly reduced fat body mass and total lipid content compared to the control group.
The authors conclude that chronic exposure of Blaptica dubia nymphs to a static magnetic field or a 50 Hz magnetic field might affect the fat body and locomotor activity, possibly as a result of stress.

Study character:

Study funded by

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