Effect of magnetic fields on antioxidative defense and fitness‐related traits of Baculum extradentatum (insecta, phasmatodea)

Abstract

This study aimed to determine the effect of magnetic fields on the antioxidative defense and fitness-related traits of Baculum extradentatum. Following exposure to magnetic fields, antioxidative defense (superoxide dismutase (SOD), catalase (CAT) activities, and total glutathione (GSH) content) and fitness-related traits (egg mortality, development dynamics, and mass of nymphs) were monitored in nymphs. The experimental groups were: control (kept out of influence of the magnets), a group exposed to a constant magnetic field (CMF) of 50 mT, and a group exposed to an alternating magnetic field (AMF) of 50 Hz, 6 mT. We found increased SOD and CAT activities in animals exposed to constant and AMFs, whereas GSH activity was not influenced by experimental magnetic fields. No differences were found in egg mortality between control and experimental groups. Significant differences in the time of development between the control and the CMF group were observed, as well as between the CMF and the AMF group. No differences were found in the mass of the nymphs between the three experimental groups. In conclusion, CMF and AMF have the possibility to modulate the antioxidative defense and some of the fitness-related traits in B. extradentatum.

The Impact of Electromagnetic Radiation of Different Parameters on Platelet Oxygen Metabolism – In Vitro Studies

“…Catalase activity is one of its parameters. Todorović et al also noted an increase in catalase enzymatic activity under the effect of electromagnetic radiation of 6 mT induction and 50 Hz frequency [12].…”

“…Different organs and cell structures can be the site of electromagnetic radiation exposure in the body. Despite numerous publications [1,4,[8][9][10][11][12][13] related to this subject, no unequivocal conclusions have been drawn which would point to specific dysfunctions and pathologies induced by the given parameters of electromagnetic radiation. Because of that, the authors undertook research on the impact of the EMF emitted by car electronics, physiotherapy equipment and display screens on the selected parameters of platelet oxidative stress: the changes in enzymatic activity of the antioxidant defense protein catalase and in the concentration of malondialdehyde, a marker of lipid membrane peroxidation.…”

Exposure to Static Magnetic Fields Affects Insulin Secretion in INS Cells

“…The insufficient insulin secretion is recognized as one of the main causes of diabetes. There are a few studies that have already evaluated the influence of exposure to magnetic fields on pancreas islet function, including strong SMF [9] and ELFMF [15,16], it is still difficult to compare the results which have been performed, not only because of the cells used are different from each other [13], but also the methods used were quite inconsistent in different researches. Therefore, the association between pancreas islet function and magnetic fields exposure is still controversial and uncertain [17].…”

“…Previous studies have shown that SMF alone does not exhibit lethal effects on cell growth, survival, and DNA damage [7,8], but are still controversial [9,10]. It is urgent for us to provide a clear answer regarding the impact of SMFs on cell function, which is due to the use of SMFs of certain intensities and different cell types.…”

Effects of two different waveforms of ELF MF on bioelectrical activity of antennal lobe neurons ofMorimus funereus(Insecta, Coleoptera)

“…It is known that reactive oxygen species (ROS) affect the membrane properties, e.g., membrane current and potential, ionic gradients, level of ion channel openness, AP duration and amplitude, after depolarization, and spontaneous activity and loss of excitability (Kourie 1998, Annunziato et al 2002. On the other hand, MF generate reactive oxygen species (ROS) in different tissues (Akdag et al 2007, Simkó 2007, Todorović et al 2012. Nervous system is extremely sensitive to peroxidative damage (Metodiewa and Kośka 2000) and many researchers have shown that ELF MF cause changes in antioxidant system in different biological systems (Akdag et al 2010, Chu et al 2011, Cui et al 2012.…”