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Abstract Title:

Exposure to a 50-Hz magnetic field induced mitochondrial permeability transition through the ROS/GSK-3β signaling pathway.

Abstract Source:

Int J Radiat Biol. 2016 ;92(3):148-55. Epub 2016 Feb 5. PMID: 26850078

Abstract Author(s):

Baihuan Feng, Liping Qiu, Chunmei Ye, Liangjing Chen, Yiti Fu, Wenjun Sun

Article Affiliation:

Baihuan Feng

Abstract:

PURPOSE: To investigate the biological effects of a 50-Hz magnetic field (MF) on mitochondrial permeability.

MATERIALS AND METHODS: Human amniotic epithelial cells were exposed to MF (50 Hz, 0.4 mT) for different durations. Mitochondrial permeability, mitochondrial membrane potential (ΔΨm), cytochrome c (Cyt-c) release and the related mechanisms were explored.

RESULTS: Exposure to the MF at 0.4 mT for 60 min transiently induced mitochondrial permeability transition (MPT) and Cyt-c release, although there was no significant effect on mitochondrial membrane potential (ΔΨm). Other than decreasing the total Bcl-2 associated X protein (Bax) level, MF exposure did not significantly affect the levels of Bax and B-cell lymphoma-2 (Bcl-2) in mitochondria. In addition, cells exposed to the MF showed increased intracellular reactive oxidative species (ROS) levels and glycogen synthase kinase-3β (GSK-3β) dephosphorylation at 9 serine residue (Ser(9)). Moreover, the MF-induced MPT was attenuated by ROS scavenger (N-acetyl-L-cysteine, NAC) or GSK-3β inhibitor, and NAC pretreatment prevented GSK-3β dephosphorylation (Ser(9)) caused by MF exposure.

CONCLUSION: MPT induced by MF exposure was mediated through the ROS/GSK-3β signaling pathway.

Study Type : Human In Vitro

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Sayer Ji
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