Effects of extremely low frequency magnetic field on the parameters of oxidative stress in heart

• Autorzy: Goraca A. , Ciejka E. , Piechota A.
• Języki publikacji: EN

Abstrakty

EN

Increasing production of free radicals in organisms is one of the putative mechanisms by which a extremely low frequency magnetic field (ELF-MF) may affect biological systems. The present study was designated to assess if ELF-MF applied in the magnetotherapy, affects generation of reactive oxygen species (ROS) in heart tissue and antioxidant capacity of plasma according to its working time. The experiments were performed on 3 groups of animals: group I - control; group II - exposed to 40 Hz, 7 mT, 30 min/day for 14 days (this field is commonly applied in magnetotherapy); group III - exposed to 40 Hz, 7 mT, 60 min/day for 14 days. Control rats were housed in a separate room without exposure to ELF-MF. Immediately after the last exposure, blood was taken from the tail vein and hearts were removed under anesthesia. The effect of the exposure to ELF-MF on oxidative stress was assessed on the basis of the measurements of thiobarbituric acid reactive substances (TBARS), hydrogen peroxide (H2O2), total free sulphydryl groups (-SH groups) and reduced glutathione (GSH) concentrations in heart homogenates. The total antioxidant capacity of plasma was measured using ferric reducing ability method (FRAP). Exposure to ELF-MF (40 Hz, 7 mT, 30 min/day for 2 weeks) did not significantly alter tissue TBARS, H2O2, total free -SH groups, reduced glutathione (GSH) and total antioxidant capacity of plasma. By contrast, ELF-MF with the same frequency and induction but used for 60 min/day for 14 days caused significant increase in TBARS and H2O2 concentration (P<0.01) and decrease in the concentration of GSH (P<0.05) and total free -SH groups in heart homogenates. Moreover, exposure of rats to ELF-MF (40 Hz, 7 mT, 60 min/day for 2 weeks) resulted in the decrease of plasma antioxidant capacity. Our results indicate that effects of ELF-MF on ROS generation in the heart tissue and antioxidant capacity of plasma depend on its working time.

Słowa kluczowe

EN

extremely low frequency magnetic field; parameter; oxidative stress; heart; free radical; reactive oxygen species; antioxidant capacity; lipid peroxidation; malondialdehyde; thiobarbituric acid

• Wydawca: -
• Czasopismo: Journal of Physiology and Pharmacology
• Rocznik: 2010
• Tom: 61
• Numer: 3
• Opis fizyczny: p.333-338,fig.,ref.

Twórcy

autor

Goraca A.

• Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland

autor

Ciejka E.

autor

Piechota A.

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