Monochromatic red light of LED protects embryonic cells from oxidative stress caused by radiofrequency radiation

Abstract

Olexandr Tsybulin, Evgeniy Sidorik, Sergiy Kyrylenko, Igor Yakymenko

Objective: Oxidative mechanisms of the mutagenic and carcinogenic potential of radiofrequency radiation (RFR) have been demonstrated recently. This opens the need for antioxidative approach for protection of living cells from harmful effects of RFR. In this study, we aimed to assess the antioxidant potential of monochromatic red light of light-emitting diodes (LED) in RFR-exposed embryonic cells. Methods: One group of Japanese quail embryos was exposed in ovo to GSM 900 MHz RFR (I = 1 14 µW/cm2; SAR = 0.17 mW/kg; t = 158 h; discontinuously) before and during the first hours of incubation. The second group of embryos was exposed to RFR in the same regimen and additionally to LED red light (λmax = 630-650 nm; I = 0.1 mW/cm2; t = 180 c; discontinuously). The third group of embryos were served as control. The rate of somitogenesis, level of lipid peroxidation, activity of superoxide dismutase (SOD) and catalase in tissues of 38-h embryos were assessed. Results: Red light of LED exposure resulted in statistically significant reversion of the rate of somitogenesis decreased under RFR exposure; as well as in reversion of significantly increased level of lipid peroxidation and decreased catalase activity in tissues of RFR exposed embryos. In vitro significant suppression of SOD and catalase activities by short-term RFR exposure were partially reversed by LED red light treatment. Conclusion: Red light of LED can protect embryonic cells from oxidative stress caused by low intensity RFR exposure. This is of particularly importance in terms of potential mutagenicity and carcinogenicity of low intensity RFR, which in turn depends on the oxidative potential of RFR.