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• W2021105541 endingPage "1070" @default.
• W2021105541 startingPage "1060" @default.
• W2021105541 abstract "Abstract Although melatonin ( MT ) has been reported to protect cells against oxidative damage induced by electromagnetic radiation, few reports have addressed whether there are other protective mechanisms. Here, we investigated the effects of MT on extremely low‐frequency electromagnetic field ( ELF ‐ EMF )‐induced Na v activity in rat cerebellar granule cells ( GC s). Exposing cerebellar GC s to ELF ‐ EMF for 60 min. significantly increased the Na v current ( I Na ) densities by 62.5%. MT (5 μM) inhibited the ELF ‐ EMF ‐induced I Na increase. This inhibitory effect of MT is mimicked by an MT 2 receptor agonist and was eliminated by an MT 2 receptor antagonist. The Na v channel steady‐state activation curve was significantly shifted towards hyperpolarization by ELF ‐ EMF stimulation but remained unchanged by MT in cerebellar GC that were either exposed or not exposed to ELF ‐ EMF . ELF ‐ EMF exposure significantly increased the intracellular levels of phosphorylated PKA in cerebellar GC s, and both MT and IIK ‐7 did not reduce the ELF ‐ EMF ‐induced increase in phosphorylated PKA . The inhibitory effects of MT on ELF ‐ EMF ‐induced Na v activity was greatly reduced by the calmodulin inhibitor KN 93. Calcium imaging showed that MT did not increase the basal intracellular Ca 2+ level, but it significantly elevated the intracellular Ca 2+ level evoked by the high K + stimulation in cerebellar GC that were either exposed or not exposed to ELF ‐ EMF . In the presence of ruthenium red, a ryanodine‐sensitive receptor blocker, the MT ‐induced increase in intracellular calcium levels was reduced. Our data show for the first time that MT protects against neuronal I Na that result from ELF ‐ EMF exposure through Ca 2+ influx‐induced Ca 2+ release." @default.
• W2021105541 created "2016-06-24" @default.
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• W2021105541 date "2014-02-18" @default.
• W2021105541 modified "2023-10-03" @default.
• W2021105541 title "Melatonin protects rat cerebellar granule cells against electromagnetic field‐induced increases in<scp><scp>Na</scp></scp>⁺currents through intracellular<scp><scp>Ca</scp></scp>²⁺release" @default.
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• W2021105541 doi "https://doi.org/10.1111/jcmm.12250" @default.
• W2021105541 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4508145" @default.
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